N-3NSPI (CA) RIR-1 to 18 - Redacted
297 passages
REDACTED (f) Please explain why none of these issues or the associated costs were foreseen or identified previously? Response IR-3: 5 (a) The original environmental timelines and budget were developed based on internal subject matter exper...
AI summary The response explains that the original environmental timelines and budget for the Ruth Falls Main Dam Refurbishment project were based on previous refurbishment projects and regulatory processes in place at the time. New legislation enacted in 2019 increased permitting requirements, including the need for a Fisheries Act Authorization, which was not required during the original filing.
NON-CONFIDENTIAL Additional Information Requested March 31, 2021 NS Power provided an updated project and environmental description and associated appendices to NSECC April 9, 2021 6 & 7 Additional Information Requested June 18, 2021 NS Po...
AI summary The document outlines a series of information requests and approvals related to the Ruth Falls Main Dam Refurbishment project by NS Power, including updates to the project and environmental descriptions, applications for watercourse alteration approvals, and interactions with NSECC and NSUARB.
CI 50518 CA IR-5 Attachment 1 Page 1 of 35 REDACTED (CONFIDENTIAL INFORMATION REMOVED) PO Box 910 ● Halifax, Nova Scotia ● Canada ● B3J 2W5 December 20, 2019 Kelly Henderson Nova Scotia Environment 30 Damascus Road, Suite 115 Bedford, NS B...
AI summary Nova Scotia Power (NSPI) is planning to refurbish the Ruth Falls Dam on the Sheet Harbour Hydro System to meet Canadian Dam Association safety guidelines. The project is expected to last about six months, starting in May/June 2020, and includes environmental protective measures. An application for approval and project description have been submitted for review.
CI 50518 CA IR-5 Attachment 1 Page 10 of 35 Nova Scotia Environment Application for Approval DIVISION 1 - WATER
AI summary The document is an application for approval related to water management under Division 1 of the Nova Scotia Environment. It outlines a regulatory proceeding involving environmental compliance and water-related regulations.
SECTIO ECTION A (FOR ALL APPLICATIONS) ALL INFORMATION MUST BE PROVIDED: It is an offense under Sections 158 (a) and 158 (b) of the Environment Act to provide false or misleading
AI summary The text outlines that providing false or misleading information is an offense under Sections 158 (a) and 158 (b) of the Environment Act, emphasizing the importance of accurate information in regulatory proceedings.
PROJECT OVERVIEW NSPI is proposing refurbishment of the Ruth Falls Dam (the "Project"), located on the Sheet Harbour Hydro System in Sheet Harbour NS, in 2020. This work is necessary in order to address structural and freeboard deficiencie...
AI summary NSPI proposes refurbishing the Ruth Falls Dam to address structural issues and meet safety guidelines. The project includes replacing stop log bays, installing a spillway, and modifying the dam's structure. Fish conveyance systems will be used to ensure fish movement during construction, which is expected to take six months starting in May 2020.
CI 50518 CA IR-5 Attachment 1 Page 15 of 35 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary This document discusses the Ruth Falls Dam Refurbishment Project under the Sheet Harbour Hydro System, including an environmental description. A redacted image is included on page 27.
2.0 CONSTRUCTION Refurbishment of the Ruth Falls Dam was identified as a high priority within NS Power's dam safety risk prioritization due to the deteriorated condition of the concrete structures and the stability deficiencies in the emba...
AI summary The refurbishment of the Ruth Falls Dam involves replacing concrete structures with rubber dams and installing new spillway systems, while ensuring fish passage is maintained during construction. The project includes temporary water level reductions and the installation of temporary barriers.
CI 50518 CA IR-5 Attachment 1 Page 16 of 35 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project under the Sheet Harbour Hydro System, accompanied by an image. It includes a reference to environmental considerations and is part of a regulatory proceeding in Nova Scotia.
CI 50518 CA IR-5 Attachment 1 Page 17 of 35 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary This document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including an environmental description and a redacted image. Key details are not visible due to confidentiality.
4.2 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt‐laden water in the w...
AI summary Erosion and sedimentation control measures, including hay and silt fencing, will be implemented to prevent sediment-laden water from entering the headpond during dewatering. Recovered water will be pumped to areas with vegetation for filtration, and NSPI personnel will monitor water quality during the recharge process.
4.3 Construction Material and Debris Measures will be taken to prevent any materials used in the various work activities from entering the watercourse. All such materials will be applied in a controlled manner and any excess material will...
AI summary Measures are outlined to prevent construction materials and debris from entering watercourses, including controlled application, containment of excess material, and proper disposal on NSPI property or approved landfills following NSE guidelines.
CI 50518 CA IR-5 Attachment 1 Page 18 of 35 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and includes an environmental description. A redacted image is referenced on page 30.
4.4 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refuelling and lubrication shall be in designated ar...
AI summary The section outlines requirements for equipment and machinery used near water bodies, emphasizing mechanical integrity, safe refuelling practices, storage distances from water, flood protection, and oil spill preparedness.
NSE Request: Provide a detailed erosion and sedimentation control plan.
AI summary The NSE Request asks for a detailed erosion and sedimentation control plan, indicating a need for environmental management strategies related to construction or land development activities.
NSPI Response: Detailed erosion and sedimentation control plans are completed by the contractor as they will assume the responsibility/liability of the plans throughout the length of the project. NSPI will develop a project Environmental P...
AI summary NSPI outlines measures for erosion and sedimentation control during construction projects, including the use of silt fencing, temporary erosion control materials, and regular maintenance of containment barriers. Contractors are responsible for developing these plans, and NSPI will create an Environmental Protection Plan upon receiving them.
NSPI Response: The temporary lowering of the reservoir by 7‐15 feet will cause the biggest disruption. The fish ladder and downstream fish bypass pipe will also be dewatered during construction. As well, NSPI is anticipating an additional...
AI summary NSPI outlines the temporary lowering of a reservoir and associated fish passage measures during construction at Ruth Falls. Mitigation includes fish conveyance systems, sediment control, and water level management to minimize ecological disruption. The fish transfer system will be monitored and operated by qualified personnel.
CI 50518 CA IR-5 Attachment 3 Page 5 of 17 REDACTED (CONFIDENTIAL INFORMATION REMOVED) February 27, 2020 Grant Brown temporary access road may be required, currently consists of exposed bedrock and boulders. Typically, temporary access roa...
AI summary The document outlines construction plans for a temporary access road and dewatering of the Ruth Falls Reservoir to allow fish spawning. It details materials, safety protocols, and environmental protections to be followed during the project, including handling of hazardous materials and oil spill contingency plans.
RE: Application # 2019-2638165-00 With reference to your application please be advised that as a result of an initial review, your application has been deemed incomplete. As a result, Nova Scotia Environment (NSE) is requesting the followi...
AI summary Nova Scotia Environment has deemed an application incomplete and requested additional information, including detailed design drawings, considerations for construction completion amid potential impacts from COVID-19, a detailed water management plan, and descriptions of how high flow scenarios will be managed, particularly regarding erosion and sediment control.
NSPI Response: The erosion and sedimentation control (ESC) plan will be developed by the selected contractor after the project is awarded. An Environmental Protection Plan will be developed by NSP and will include the site specific ESC Pla...
AI summary NSPI outlines the development of an ESC plan by the contractor and the inclusion of this plan in an Environmental Protection Plan by NSP. The project timeline will be refined during the RFP stage, with the goal of installing rubber bladders by September. Water management during high inflow events will be handled by hydro operations personnel, and erosion risks are considered minimal due to the downstream bedrock composition.
NSPI Response: The reservoir will be lowered primarily through generation. Water will flow through the power canal to the generating station until the reservoir level reaches the level of the intake. While the generating station is online,...
AI summary NSPI outlines the process for lowering the reservoir through generation and controlled removal of stop logs, emphasizing monitoring for environmental impacts and downstream flow management during the drawdown.
CI 50518 CA IR-5 Attachment 5 Page 5 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) June 22, 2020 Grant Brown of construction to ensure compliance with NSPI standards and best practices and all project‐specific approvals or authorizati...
AI summary The document outlines requirements for water quality sampling and discharge limits under Watercourse Alteration Approvals. It emphasizes compliance with NSPI standards and includes specific thresholds for Total Suspended Solids. The text also requests additional information on potential impacts to aquatic organisms and wetlands, along with mitigation measures.
NSPI Response: A rare species assessment, wetland delineation, and functional assessment of the area surrounding the project site was conducted by Strum Consulting in September 2017, see the report included in this submission. It is not ex...
AI summary NSPI submitted a report by Strum Consulting from September 2017 assessing the impact of a project on rare species and wetlands. The report indicates that the four identified wetlands are unlikely to be affected due to their proximity to the construction site and unchanged water management levels.
CI 50518 CA IR-5 Attachment 5 Page 10 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) September 29, 2017 Ms. Jenny LeBlanc Nova Scotia Power Inc. 1223 Lower Water Street Halifax, NS B3J 3S8 Ms. Jenny LeBlanc, Re: Rare Species Assessment...
AI summary A report on the Rare Species Assessment, Wetland Delineation, and Functional Assessment for the Ruth Falls Dam site is submitted to Nova Scotia Power Inc. by Strum Environmental. The report includes observations, findings, and recommendations related to the environmental impact of the dam.
CI 50518 CA IR-5 Attachment 5 Page 11 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Rare Species Assessment, Wetland Delineation, and Functional Assessment September 29, 2017 Ruth Falls Dam Ms. Jenny LeBlanc Nova Scotia Power Inc. Pro...
AI summary This document includes a rare species assessment, wetland delineation, and functional assessment conducted on September 29, 2017, for the Ruth Falls Dam project by Nova Scotia Power Inc. The assessment was carried out by Ms. Jenny LeBlanc.
CI 50518 CA IR-5 Attachment 5 Page 13 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Rare Species Assessment, Wetland Delineation, and Functional Assessment September 29, 2017 Ruth Falls Dam Ms. Jenny LeBlanc Nova Scotia Power Inc. Pro...
AI summary This document contains a rare species assessment, wetland delineation, and functional assessment conducted on September 29, 2017, for the Ruth Falls Dam project by Ms. Jenny LeBlanc on behalf of Nova Scotia Power Inc. Project #17-6170.
Project #17-6170 Common Name Scientific Name SARA NSESA NSDNR COSEWIC ACCDC Evening Grosbeak Coccothraustes vespertinus Not Listed Not Listed 4 Secure Special Concern S3S4B, S3N Gray Catbird Dumetella carolinensis Not Listed Not Listed 2 M...
AI summary The document presents a table listing various bird species along with their conservation status across multiple organizations and agencies in Nova Scotia. It includes information on their common and scientific names, as well as their status according to SARA, NSESA, NSDNR, COSEWIC, and ACCDC.
CI 50518 CA IR-5 Attachment 5 Page 18 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Rare Species Assessment, Wetland Delineation, and Functional Assessment September 29, 2017 Ruth Falls Dam Ms. Jenny LeBlanc Nova Scotia Power Inc. Pro...
AI summary This document includes a rare species assessment, wetland delineation, and functional assessment conducted on September 29, 2017, for the Ruth Falls Dam project by Nova Scotia Power Inc. The assessment was performed as part of Project #17-6170.
CI 50518 CA IR-5 Attachment 5 Page 22 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Rare Species Assessment, Wetland Delineation and Functional Assessment September 29, 2017 Ruth Falls Dam Ms. Jenny LeBlanc Nova Scotia Power Inc. Proj...
AI summary The document references a rare species assessment, wetland delineation, and functional assessment conducted on September 29, 2017, for the Ruth Falls Dam project by Nova Scotia Power Inc. under project number 17-6170.
Nova Scotia Power Inc. Project #17-6170 FUNCTION DEFINITION POTENTIAL BENEFITS Water Quality Maintenance Functions Water Cooling The effectiveness for maintaining or reducing temperature of downslope waters. Support coldwater fish and othe...
AI summary The document outlines various ecological and water quality maintenance functions associated with wetland ecosystems, including water cooling, sediment retention, phosphorus and nitrate removal, and habitat support for diverse species such as fish, invertebrates, amphibians, reptiles, waterbirds, songbirds, raptors, mammals, and native plants. These functions contribute to maintaining water quality and regional biodiversity.
4.2 Results The results of the WESP-AC functional assessment identified that Wetlands 1-4 serve high benefit to the surrounding area for the following wetland functions: - Water Cooling (WL4); - Phosphorus Retention (WL4); - Nitrate Remova...
AI summary The WESP-AC functional assessment identified key wetland functions for Wetlands 1-4, highlighting their ecological benefits such as water cooling, phosphorus retention, and habitat support. Wetlands 1, 2, and 3 are swamp wetlands with similar scores, influenced by the dam and their remote, pristine nature.
CI 50518 CA IR-5 Attachment 5 Page 27 of 160 September 29, 2017 Rare Species Assessment, Wetland Delineation and Functional Assessment Ruth Falls Dam Ms. Jenny LeBlanc Nova Scotia Power Inc.
AI summary This document includes an assessment of rare species, wetland delineation, and functional assessment related to the Ruth Falls Dam conducted by Ms. Jenny LeBlanc of Nova Scotia Power Inc.
7.0 REFERENCES ACCDC (Atlantic Canada Data Conservation Centre). 2017. Data Report 5918 . Atlantic Canada Conservation Data Centre, New Brunswick Canada. Arsenault, M., Mittelhause, G.H., Cameron, D., Dibble, A.C., Haines, A., Rooney, S.C....
AI summary The document provides a list of references used in the proceeding, including publications, reports, and legislation related to biodiversity, species conservation, and environmental regulations in Nova Scotia and Canada.
Table 1: Flora and Fauna SOCI within 100 km of the Study Area, Ruth Falls Project#17-6170 Common Name Alewife American Eel Atlantic Salmon Atlantic Salmon - Inner Bay of Fundy pop. Atlantic Sturgeon Brook Trout Lake Trout Striped Bass- Bay...
AI summary Table 1 lists various species of flora and fauna within 100 km of the Ruth Falls Project study area, including their conservation status according to multiple organizations and legislation such as SARA, NSESA, NSDNR, COSEWIC, and ACCDC.
References Environmental Laboratory (1987), Corps of Engineers Wetlands Delineation Manual, US Army Corp of Engineers, 1987. Reed. 1988. National List of Plant Species that Occur in Wetlands: NE Region (Region 1) U.S. Fish and Wildlife Ser...
AI summary The text provides a list of references to various publications and manuals related to wetlands delineation and hydric soil identification, including the Corps of Engineers Wetlands Delineation Manual and a guide from the USDA-NRCS.
WETLAND 1 Cover Page: Basic Description of Assessment WESP-AC version 1.2 OF7 ody Wo Uni que nes s The tion is m ostl ood but land ithin 5 k m h % w ood If s and tinu OF AA 's ve geta <10 nter "3" e to 8. I y w y up s w ave y co ver. o, e...
AI summary The document provides a basic description of an assessment for Wetland 1, including details about vegetation coverage, land use, and environmental considerations. It outlines the percentage of land covered by woody vegetation within specific radii and notes the presence of shrubland and forest, excluding certain areas.
WETLAND 1 A В C D F22 Fringe Wetland During most of the year, open water within or adjacent to the vegetated AA (in a lake, stream, or river) is much wider than the vegetated wetland. Enter 0 119 J "1" if true, "0" if false. - F23 Lacustri...
AI summary The text provides a table with criteria for classifying wetlands, including fringe wetlands, lacustrine wetlands, and the percentage of an area without surface water. It outlines specific conditions for each category and provides instructions for entering values.
WETLAND 1 In the last column, place a check mark next to any item present in the CA that is likely to have elevated the load of waterborne or windborne sediment reaching the wetland from its CA. [FA, FR, INV, PH, SRv, STR] Severe (3 points...
AI summary The text provides a table for assessing sediment load impacts on a wetland based on factors like erosion, soil disturbance, and proximity to sediment sources. It includes criteria for scoring severity, recency, and distance of disturbance from the wetland.
WETLAND 2 Cover Page: Basic Description of Assessment WESP-AC version 1.2 98 OF2 0 Wa ter Q uali ty Sen sitiv ity a: (a ) le lly p cted fro land s be se i t fee ds a uife wel l tha The AA is i rote ost t se n an are ga m m use cau n aq r,...
AI summary The text describes an assessment of Wetland 2 under the WESP-AC version 1.2, focusing on water quality sensitivity and degraded water conditions. It outlines criteria for evaluating wetlands based on their role in feeding aquatic wildlife and the risk of contamination due to logical conditions.
WETLAND 4CI 50518 CA IR-5 Attachment 5 Page 117 of 160 A B C D 169 F32 P ond ed O Wa ter pen - Min imu m S ize re (a m) Dur ing t of the ing s the larg h of tha t is p ond ed a nd is in o r bo rder ing t he A A is >0. 01 h bou t 10 m b y 1...
AI summary The text appears to be a table with technical details related to wetland evaluation and site protection assessment criteria. It includes information on ponded water, minimum size, and vegetation coverage, likely used for environmental compliance and regulatory purposes.
WETLAND 4 Aberrant Timing of Water Inputs artificial drains or ditches in or near the wetland accelerated downcutting or channelization of an adjacent or internal channel (incised below the historical water table level) logging within the...
AI summary This section of the document outlines factors that may cause aberrant timing of water inputs in wetlands, including artificial drains, logging, and subsidence. It provides a scoring system to assess the severity and spatial extent of these effects on water timing within the wetland area.
Results for this Assessment Area (AA): Function Benefits Wetland Functions or Other Attributes: Score (normalized) Function Rating Score (normalized) Benefits Rating Function Score (raw) Benefits Score (raw) Water Storage & Delay (WS) 1.17...
AI summary The table presents an assessment of wetland functions and benefits with normalized scores, ratings, and raw scores. It evaluates various ecological attributes such as water storage, sediment retention, phosphorus retention, and habitat support for different species. The data highlights varying levels of function and benefit scores across multiple categories.
CI 50518 CA IR-5 Attachment 5 Page 128 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Table of Contents 1.0 1.1 1.1.1 1.1.2 1.1.3 1.2 SHEET HARBOUR HYDROELECTRIC SYSTEM VEGETATION SURVEYS 1 Vegetation and Wetlands 1 Species at Risk (SA...
AI summary The text outlines a vegetation and wetlands survey conducted for the Sheet Harbour Hydroelectric System, including sections on rare plant species, wetland surveys, and appendices listing vascular plants and species composition in the Governor Lake and Ruth Falls Flowage reservoirs.
Governor Lake Reservoir The vascular plant survey conducted on Governor Lake reservoir did not reveal the presence of any of the rare vascular plants identified as potentially present by the species at risk modelling exercise. The timing o...
AI summary A vascular plant survey at Governor Lake Reservoir did not find any rare species identified by risk models. Algae-like pondweed was found but is not considered at risk. No mitigative measures are recommended for this species.
Ruth Falls Flowage Reservoir A vascular plant survey was conducted on Ruth Falls Flowage reservoir to determine if any of the rare or sensitive vascular plant species identified as potentially present in the reservoir by the species at ris...
AI summary A vascular plant survey was conducted at Ruth Falls Flowage Reservoir to check for rare or sensitive species. No such species were found, except for algae-like pondweed, which is classified as secure. The survey timing affected detection of southern twayblade, which is not impacted by the hydroelectric system due to its habitat being unaffected by reservoir water levels.
CI 50518 CA IR-5 Attachment 5 Page 139 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Shore bog habitat was observed in 14 out of 21 wetlands found around the margin of Ruth Falls Flowage. Shore bogs are not tolerant of frequent or ext...
AI summary The text describes the ecological characteristics of various wetland types around Ruth Falls Flowage, including shore bogs, floating bogs, and coniferous treed shore swamps. It notes the presence of specific vegetation and tree species, and mentions that no rare or sensitive vascular plant species were found in the sampled wetlands.
Governor Lake Reservoir The vascular plant surveys conducted in the littoral zone of Governor Lake did not reveal the presence of any vascular plant species considered to be rare or sensitive by NSDNR. Algae-like pondweed, a species consid...
AI summary Vascular plant surveys at Governor Lake Reservoir found no rare or sensitive species. Algae-like pondweed, which is uncommon to common in Nova Scotia, was present but not at risk due to the reservoir's long-term operation. The survey also identified 25 wetlands, with shore marsh being the most common type.
Ruth Falls Flowage Reservoir No vascular plant species considered to be sensitive or at risk by NSDNR were encountered in the littoral zone of Ruth Falls Flowage. Algae-like pondweed, a species considered to be uncommon to fairly common in...
AI summary The Ruth Falls Flowage Reservoir survey found no sensitive or at-risk vascular plant species in the littoral zone or wetlands. Algae-like pondweed, though uncommon in Nova Scotia, is not considered at risk. The survey also identified 21 wetlands, with shore bog being the most common type. Continued reservoir operation is not expected to harm the local pondweed population.
APPENDIX D Vascular Plant Cover of Dominant Species Found in the Five Wetlands Surveyed in the Governor Lake Reservoir CI 50518 CA IR-5 Attachment 5 Page 154 of 160
AI summary This section of the document presents data on the vascular plant cover of dominant species found in five wetlands surveyed in the Governor Lake Reservoir, as part of an environmental assessment.
CI 50518 CA IR-5 Attachment 6 Page 1 of 3 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 30 Damascus Road, Suite 115 Bedford, NS Canada B4A 0C1 902-424-7773 T 902-424-0597 F www.novascotia.ca Our File Number: 95100-30-BED-2019-2638165 March 3...
AI summary Nova Scotia Power's application for the Sheet Harbour Hydro System – Ruth Falls Dam Refurbishment has been deemed incomplete due to missing information. The Department of Environment and Climate Change (ECC) has requested detailed design drawings, updated construction schedules, and a comprehensive water management plan from qualified professionals. The application must address environmental concerns and provide clear details on construction stages and mitigation measures.
CI 50518 CA IR-5 Attachment 6 Page 2 of 3 REDACTED (CONFIDENTIAL INFORMATION REMOVED) in order to assess environmental risk and review that appropriate mitigations are in place related to the proposed activity. - a. If NSPI does not have t...
AI summary The document outlines requirements for NSPI to address environmental risks and mitigation measures related to a proposed activity. Specific attention is given to managing high flow scenarios, erosion and sediment control, and water management during construction. NSPI is requested to provide detailed plans and updates to ECC for review.
CI 50518 CA IR-5 Attachment 6 Page 3 of 3 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - 7. In order to monitor and address potential impacts, monitoring pre‐, active, and post construction periods will be needed. Water quality monitoring i...
AI summary The document outlines several requests for information related to a project, including water quality monitoring, impacts on aquatic organisms and wetlands, and public engagement updates. The applicant is required to submit this information by June 30, 2021, with a warning that failure to comply may result in the rejection of the application under Section 7 of the Approval and Notification Procedure Regulations.
CI 50518 CA IR-5 Attachment 7 Page 4 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3. Provide a detailed water management plan including: construction staging including cofferdam placement and dewatering and maintenance of flows, cont...
AI summary The document requests a detailed water management plan for a project, including construction staging, erosion and sediment control, and contingency planning for high precipitation events. It also asks for confirmation on the water management approach, potential downstream risks, and a methodology for water quality monitoring during and after construction.
CI 50518 CA IR-5 Attachment 7 Page 5 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 8. Information to date has only been provided with respect to fish. Provide similar discussion on potential impacts to other aquatic organisms and habi...
AI summary The document requests additional information on potential impacts to aquatic organisms and wetlands due to drawdown, as well as updates on public engagement and consultation, particularly with Mi'kmaq communities. Section 4.6 provides wetland and rare species monitoring details, while Sections 5, 6, and 7 cover engagement updates.
4.1 Drawdown Methodology NS Power intends to approach the drawdown of Ruth Falls Headpond the same way as all previous drawdowns conducted on its various hydro systems. Based on operational experience, the drawdown of Ruth Falls to elevati...
AI summary NS Power plans to draw down the Ruth Falls Headpond to 98.0 ft using a controlled method similar to previous hydro system drawdowns. The process will use generating units and stoplog bays to manage discharge rates, ensuring minimal erosion and environmental impact. Spill rates exceeding 500 cfs are common, and NS Power will monitor for scour and report to the Department of Environment and Climate Change if necessary.
4.4. Erosion and Sedimentation Control NS Power is anticipating minimal impacts to the surrounding environment with respect to erosion, scour and associated sedimentation of watercourses. The proposed scope of work for the Project involves...
AI summary NS Power anticipates minimal environmental impact from erosion and sedimentation due to the limited excavation involved in refurbishing the existing dam. Erosion control measures include silt fencing, water management strategies, and the use of hay. Excavation of the west abutment retaining wall will be managed with pumps to control water and sediment.
4.5 Water Quality Ruth Falls Headpond is a relatively small, shallow headpond with depths of up to 26.2 ft (8 m) in the deepest parts. Water quality of the headpond is heavily influenced by inflows from the Grant River Watershed as well as...
AI summary The text discusses the water quality of Ruth Falls Headpond, influenced by inflows from the Grant River Watershed and other tributaries. NS Power conducts water quality surveys as part of relicensing programs. The headpond has acidic conditions, phosphorus, and chlorophyll, and is classified as meso-eutrophic or eutrophic. A drawdown is proposed, and NS Power plans to monitor water quality changes through monthly sampling.
CI 50518 CA IR-5 Attachment 7 Page 14 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System for direct comparison to normal operating conditions. Water quality sampling will be completed from July to October for tem...
AI summary The document outlines water quality sampling procedures for the Sheet Harbour Hydro System, including monitoring of temperature, dissolved oxygen, total suspended solids, and turbidity from July to October. NS Power will compare samples during normal and high inflow periods to ensure compliance with standards.
CI 50518 CA IR-5 Attachment 7 Page 17 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) along the Lochaber Mines Road. Ruby-crowned Kinglet is listed as Sensitive within the NS General Status Rank. Neither of these species are anticipated...
AI summary The text discusses the potential environmental impact of the drawdown of Ruth Falls Headpond on local wildlife, specifically mentioning the Ruby-crowned Kinglet, which is listed as Sensitive in Nova Scotia. It also references mapped wetlands and conservation data from the NS Department of Lands and Forestry and the Atlantic Canada Conservation Data Centre.
CI 50518 CA IR-5 Attachment 7 Page 20 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Given the short duration of the potential change to water levels on portions of these wetlands as a result of the drawdown (9 months), NS Power is not...
AI summary NS Power anticipates short-term impacts from a 9-month drawdown of Ruth Falls Headpond but expects no long-term alterations to wetlands. A wetland monitoring plan, based on a similar project, will be used to assess impacts and ensure compliance. A rare species assessment and wetland delineation were previously conducted and found no significant impacts.
CI 50518 CA IR-5 Attachment 7 Page 49 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) August 12, 2020 Jenny LeBlanc, MREM Environmental Scientist Nova Scotia Power E-Mail: [[email protected]](mailto:[email protected]...
AI summary CBCL Limited submitted a Wetland Monitoring Plan for Nova Scotia Power's Tusket Hydro Dam Refurbishment project, addressing feedback from Jenny LeBlanc and Ian Bryson. The plan outlines ecological and shallow groundwater monitoring activities as part of the required dewatering process during dam refurbishment.
- A AC CDC List of Rank Definitions - B AC CDC Report for Project Area - C Example of Minipiezometer Construction
AI summary The text includes a list of rank definitions and a report related to a project area, along with an example of minipiezometer construction, suggesting the content may be technical and related to environmental or geological assessments.
CI 50518 CA IR-5 Attachment 7 Page 57 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) The large number of SAR and SoCC records is due to the Project Area's location within the Tusket Islands Ecodistrict, a part of Nova Scotia which occu...
AI summary The high number of SAR and SoCC records in the Project Area is attributed to its location within the Tusket Islands Ecodistrict, which is home to rare wetland flora. However, many records are outdated and may no longer be present due to changes in water levels from the Tusket dam. Monitoring of these species is not expected, but if detected, they should be included in the Tusket Falls Wetland Monitoring Plan.
Chapter 3 Monitoring Program Monitoring stations will be established prior to alteration of the lake level in order to collect baseline data. Subsequent monitoring data will be collected during the periods that the lake level is lowered, d...
AI summary Monitoring stations will be set up before altering lake levels to collect baseline data. Data will be gathered during lake level lowering, restoration, and after repairs to assess wetland drying and vegetation changes.
CI 50518 CA IR-5 Attachment 7 Page 61 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) (Adamus, 2018), a regionalized adaptation of the Wetland Evaluation Technique (WET; Adamus, 1983) and the Wetland Ecosystem Services Protocol for the...
AI summary The text discusses the WESP-AC method, a standardized approach for assessing non-tidal wetland functions and their benefits using ecological indicators and data sources such as ArcGIS and Google Earth Pro. It outlines the 18 ecosystem functions evaluated and the inputs used in the assessment process.
CI 50518 CA IR-5 Attachment 7 Page 62 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Function Definition Potential Benefit HYDROLOGIC FUNCTIONS Water Surface Storage (WS) The effectiveness for storing runoff or delaying the downslope m...
AI summary The text outlines various hydrologic and water quality maintenance functions of ecosystems, including water surface storage, stream flow support, water cooling, sediment retention, phosphorus retention, and nitrate removal. These functions are linked to benefits such as flood control, ecological system maintenance, and water quality preservation.
CI 50518 CA IR-5 Attachment 7 Page 65 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) each wetland. Monitoring data will demonstrate whether surface water drainage and/or groundwater discharge helps to sustain moisture levels in the wet...
AI summary The text outlines a hydrological monitoring program for wetlands, focusing on surface water and groundwater interactions. It discusses how monitoring data will assess the impact of construction on moisture levels, groundwater flow, and seasonal water level trends, as well as the potential influence of surrounding drainage and groundwater systems.
3.4 Post-Construction Monitoring Post-construction monitoring is outside of the scope of this monitoring Plan, although it is known that five years of post-construction monitoring will be required by NSE once the Project has been completed...
AI summary Post-construction monitoring is not included in the current monitoring plan, but NSE will require five years of monitoring after the Project is completed and the lakes return to normal levels. The monitoring plan would include vegetation and hydrogeological monitoring, with an additional WESP-AC functional assessment in year 5.
CI 50518 CA IR-5 Attachment 7 Page 68 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - a. Check water level, barometric pressure, and temperature loggers; - b. Document hydrological conditions; and - c. Photograph existing vegetation,...
AI summary The text outlines a monitoring schedule for wetlands affected by a project, including pre-construction, construction, and post-construction phases. Monitoring activities involve checking loggers, documenting conditions, and photographing vegetation and wetlands. Post-construction monitoring will continue for five years, with a final wetland functional assessment in 2026.
Chapter 5 Annual Reports A report summarizing the result of the of the 2020 baseline vegetation, wetland, and hydrology assessments will be prepared for NSPI and submitted by the end of the fiscal year (March 30, 2021). This report will in...
AI summary This chapter outlines the preparation and submission of annual reports related to wetland, vegetation, and hydrology monitoring. Reports will include detailed species lists, hydrological data, and wetland assessments, with final reports submitted by the end of the fiscal year.
5.0 Rare Species within 100 km 5.1 Source Bibliography Map 1 . A 100 km buffer around the study area
AI summary Section 5.0 discusses rare species within a 100 km buffer around the study area, referencing a map and a source bibliography. The section appears to focus on environmental considerations related to rare species.
Included datasets: Filename Contents YarmouthNS_6639ob.xls Rare and legally protected Flora and Fauna in your study area YarmouthNS_6639ob100km.xls A list of Rare and legally protected Flora and Fauna within 100 km of your study area Yarmo...
AI summary The document includes datasets related to rare and legally protected flora and fauna, managed areas, significant natural areas, and freshwater fish in the Yarmouth, Nova Scotia study area. These datasets are part of a larger regulatory proceeding context.
Data Report 6639: Yarmouth, NS Page 6 of 25 Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) P Symplocarpus foetidus Eastern Skunk Cabbage S3S4 4 Secure 77 3.4 ± 0.0 P Carex argyra...
AI summary The document presents a data report containing information on various plant and animal species in Yarmouth, NS, including their scientific and common names, conservation status, provincial legal protection, rarity rank, and distance measurements. The report includes details on both flora and fauna, highlighting endangered and threatened species.
Data Report 6639: Yarmouth, NS Page 7 of 25 Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) A Chelydra serpentina Snapping Turtle Special Concern Special Concern Vulnerable S3 3 S...
AI summary This section of the data report lists various species found in Yarmouth, NS, along with their conservation status, legal protections, and rarity rankings. The table includes details such as scientific names, common names, and their proximity to the area.
CI 50518 CA IR-5 Attachment 7 Page 81 of 103 REDACTED (CONFIDENTIAL INFORMATION REMOVED) # recs CITATION 447 Blaney, C.S. & Mazerolle, D.M. 2011. Atlantic Coastal Plain flora species at risk surveys for Mersey Tobeatic Research Institute....
AI summary The document lists various records and citations related to botanical fieldwork and species at risk surveys conducted in Nova Scotia and Atlantic Canada, including contributions from multiple researchers and organizations.
Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov A Coregonus huntsmani Atlantic Whitefish Endangered Endangered Endangered S1 7 Exotic 3 3.3 ± 1.0 NS A Myotis...
AI summary The document presents a taxonomic listing of various species, including their scientific names, conservation status, and legal protections in Nova Scotia. It includes information on endangered and threatened species such as the Atlantic Whitefish, Little Brown Myotis, and Blanding's Turtle.
Data Report 6639: Yarmouth, NS Page 10 of 25 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov A Phalaropus lobatus Red-necked Phalarope Special Concern Special...
AI summary The table provides data on various species in Yarmouth, NS, including their conservation status, legal protections, and rarity rankings. It includes information on species such as the Red-necked Phalarope, Snapping Turtle, and Canadian Lynx, along with their respective distances and counts.
Data Report 6639: Yarmouth, NS Page 11 of 25 Group A Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov Lasiurus cinereus Hoary Bat S1S2B,S1M 2 May Be At Risk 2 96.5 ± 0.0 NS Pl...
AI summary This table presents data on various bird species in Yarmouth, NS, including their scientific names, common names, conservation status, rarity rankings, and distances recorded. The data includes species such as the Hoary Bat, American Golden-Plover, and Philadelphia Vireo, along with their conservation status under provincial and national frameworks.
Data Report 6639: Yarmouth, NS Page 12 of 25 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov A Eremophila alpestris Horned Lark SHB,S4S5N 4 Secure 5 18.5 ± 0....
AI summary The data report lists various species of wildlife in Yarmouth, NS, with their conservation status, rarity rankings, and distances from the area. It includes information on species such as the Monarch butterfly, Yellow-banded Bumblebee, and several dragonflies and snaketails.
Data Report 6639: Yarmouth, NS Page 13 of 25 Taxonomic Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov I Gomphaeschna furcillata Harlequin Darner S3 3 Sensiti...
AI summary This data report lists various species of dragonflies and lichens in Yarmouth, NS, along with their conservation status, rarity rankings, and other relevant information. The table includes details such as scientific names, common names, and distances from the study area.
Data Report 6639: Yarmouth, NS Page 14 of 25 Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov N Nephroma resupinatum a lichen S2 2 May Be At Risk 2 67.8 ± 0.0 NS N Parmo...
AI summary This table lists various species of lichens and mosses found in Yarmouth, NS, including their scientific names, common names, conservation status, and rarity rankings. The data highlights several species with S2 or S2? rankings, indicating they are at risk or potentially at risk, and provides distance measurements from specific locations.
Data Report 6639: Yarmouth, NS Page 15 of 25 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov N Cladonia phyllophora Felt Lichen S2S3 5 Undetermined 1 56.4 ± 0...
AI summary This document presents a data report on lichen species in Yarmouth, NS, including their scientific names, common names, conservation statuses, and other relevant details. The report includes information on rarity rankings, number of records, and distances from locations in Nova Scotia.
Data Report 6639: Yarmouth, NS Page 16 of 25 Р COSEWIC SARA Prov Legal Prot Prov Rarity Rank Prov GS Rank # recs Distance (km) Prov Smilax rotundifolia Round-leaved Greenbrier Not At Risk S3 4 Secure 1017 0.5 ± 1.0 NS > Crocanthemum canade...
AI summary The document presents a data report listing various plant species with their conservation status, rarity rankings, and other relevant details. It includes information on species such as Round-leaved Greenbrier, Long-branched Frostweed, and Eastern White Cedar, along with their legal protection status and distance metrics.
Data Report 6639: Yarmouth, NS Page 19 of 25 Taxonomic P Sceptridium dissectum Dissected Moonwort S3 4 Secure 8 15.7 ± 5.0 NS P Polypodium appalachianum Appalachian Polypody S3 5 Undetermined 3 83.3 ± 0.0 NS P Persicaria amphibia var. emer...
AI summary The document presents a taxonomic table listing various plant species in Yarmouth, NS, with details on their conservation status, population numbers, and distribution. It includes species such as Dissected Moonwort and Nova Scotia Agalinis, along with their conservation rankings and abundance estimates.
Data Report 6639: Yarmouth, NS Page 22 of 25 # recs CITATION 40 NatureServe Canada. 2019. iNaturalist Maritimes Butterfly Records. iNaturalist.org and iNaturalist.ca. 38 Blaney, C.S. 2017. Atlantic Canada Conservation Data Centre Fieldwork...
AI summary The document provides a list of citations related to biodiversity and conservation efforts in Nova Scotia, including records of rare species, plant observations, and fieldwork reports from various organizations and researchers.
Data Report 6639: Yarmouth, NS Page 23 of 25 # recs CITATION 4 Belliveau, A.G. 2019. Maleberry (Lyonia ligustrina) count at Long Lake, Yarmouth Co., NS. E.C Smith Herbarium, Acadia University, Wolfville NS, 4 records. 4 Brunelle, PM. (comp...
AI summary The document lists various citations and records related to biodiversity and environmental data in Yarmouth, Nova Scotia, including observations of plant and animal species, conservation efforts, and research conducted by multiple institutions and individuals.
Data Report 6639: Yarmouth, NS Page 24 of 25 # recs CITATION 2 McCarthy, C. 2003. Ecological Inventory of Melanson Property, Annapolis County, Nova Scotia. Kejimkujik National Park. 2 Mills, P. 2016. Email communication to S. Blaney, re: S...
AI summary This document lists various ecological and biological records and studies conducted in Nova Scotia, including inventories, species sightings, and data collections related to flora and fauna.
Note: A legend must be supplied for all mapping describing symbols used, scale and north orientation. Description Submitted Waiver requested Reason for Waiver 6A - Attach for all applicable Water Applications Proof of Ownership/Agreement/L...
AI summary The document outlines the required submissions for different types of water applications, including proof of ownership, site plans, and environmental assessments. It emphasizes the importance of complete and high-quality documentation to avoid delays or rejections in the application process.
SECTION A (FOR ALL APPLICATIONS) ALL INFORMATION MUST BE PROVIDED: Name of watercourse and watercourse it is a tributary to Community and County name 1:50,000 Topographic map with alteration location marked 1:50,000 Topographic map number...
AI summary This document outlines the requirements for watercourse alteration applications, including information on the watercourse, site details, plans, and compliance with regulations. It also includes sections for certification by the applicant and a certified installer.
CI 50518 CA IR-5 Attachment 9 Page 11 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Environmental & Project Description for Construction Activities Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation 2021 CI 50518 CA IR-...
AI summary This document provides an environmental and project description for the installation of a sluice gate at the Ruth Falls Dam as part of the Sheet Harbour Hydro System in 2021.
CI 50518 CA IR-5 Attachment 9 Page 14 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description, including a redacted image related to the project.
CI 50518 CA IR-5 Attachment 9 Page 15 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Flow in the area is controlled by NSPI Hydro O...
AI summary The Sheet Harbour Hydro System's Ruth Falls Dam Sluice Gate Installation Project involves managing water levels and flows to support fish migration, particularly for Atlantic salmon and American eel. Environmental assessments indicate low salmon returns and concerns about mercury contamination. Water quality parameters are generally good, though some metals exceed guidelines. Wetlands and rare species were assessed, with no significant impacts expected from the project.
CI 50518 CA IR-5 Attachment 9 Page 16 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description piers and underneath the deck of the dam. The...
AI summary The document discusses the installation of sluice gates at the Ruth Falls Dam in Sheet Harbour Hydro System, noting the presence of a Tree Swallow nest in the control building. The NS Department of Lands and Forestry has been notified, and a SAR permit application has been submitted to remove the nests after the birds have left by late August/early September. Work on the sluice gates will be delayed until this occurs.
4.2 Erosion and Sedimentation Control NS Power is anticipating minimal impactsto the surrounding environment with respect to erosion, scour and associated sedimentation of watercourses. The proposed scope of work for the Project involves n...
AI summary NS Power anticipates minimal environmental impact from erosion and sedimentation due to the project's construction methods, which avoid excavation and use silt fencing. The project will not involve instream work, and sediment control measures are in place to manage runoff.
CI 50518 CA IR-5 Attachment 9 Page 20 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description throughout construction to ensure periods of h...
AI summary The document discusses the installation project at the Ruth Falls Dam Sluice Gate in Sheet Harbour Hydro System, emphasizing the need for erosion and sedimentation control plans during construction. NS Power is requested to provide a site-specific plan before starting activities, ensuring environmental measures are in place.
4.3 Construction Material and Debris Construction materials include concrete, wood, gravel, and slide gates. A list of other products to be used by the contractor will be submitted to NSPI prior to start of work for approval based on healt...
AI summary The document outlines procedures for managing construction materials and debris during a project on NSPI property. It emphasizes compliance with WHMIS, SDS availability, and controlled material application to prevent contamination of nearby watercourses. The site is prepared with gravel and leveling, and debris will be removed and disposed of according to regulations.
4.4 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refuelling and lubrication shall be in designated ar...
AI summary Equipment and machinery near water bodies must be mechanically sound, with refuelling and lubrication conducted away from water sources. Petroleum storage and spill prevention measures are required, including the development of an oil spill contingency plan and on-site spill kits.
Table 1: Summary of potential impacts associated with the Project and mitigation measures to prevent or minimize impacts. prevent or minimize impacts. Potential Effect Measure to Mitigate Loss of fish habitat There will be a small permanen...
AI summary The table outlines potential environmental impacts of a project, specifically the loss of fish habitat due to a small permanent instream footprint from a new support slab for a control building. Mitigation measures include maintaining normal water levels in the headpond and avoiding the need for cofferdams during gate installation.
CI 50518 CA IR-5 Attachment 9 Page 23 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description NS Power will continue monthly updates with th...
AI summary NS Power is working on the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and has been engaging with the Mi'kmaw Conservation Group and Millbrook First Nation to address potential environmental impacts. Updates on the project and engagement efforts have been shared, with plans to publish an article in the Millbrook monthly newsletter.
CI 50518 CA IR-5 Attachment 9 Page 24 of 55 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description. It includes a redacted image that likely contains details about the project's environmental impact.
1. Definitions - a. Act means Environment Act. 1994-95, c.1, s.1 , and includes, unless the context otherwise requires, the regulations made pursuant to the Act, as amended from time to time. - b. Department means the Nova Scotia Departmen...
AI summary This section defines key terms used in the regulatory proceeding, including the Environment Act, the Department of Environment and Climate Change, the Minister, the Site, and Surface Watercourse, providing contact details and legal context.
CI 50518 CA IR-5 Attachment 10 Page 4 of 14 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - i. The Approval Holder(s) shall bear all expenses incurred in carrying out the environmental monitoring required under the terms and conditions of th...
AI summary The document outlines the requirements and responsibilities of the Approval Holder(s) regarding environmental monitoring, construction oversight, and compliance with regulatory standards for a project in Nova Scotia. It specifies the need for qualified personnel, adherence to industry standards, and submission of required documentation.
5. Surface Water - a. The Approval Holder(s) shall ensure the Site is developed and maintained to prevent contaminants from being discharged into a water resource or beyond the property boundary. - b. Monitoring during construction: The Ap...
AI summary The document outlines requirements for managing surface water contamination during construction, including water quality limits for suspended solids, erosion control plans, and monitoring obligations for the Approval Holder(s) to ensure compliance with environmental standards.
CI 50518 CA IR-5 Attachment 10 Page 6 of 14 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - e. No authority is granted by this Approval to enable the Approval Holder(s) to discharge surface water onto adjoining lands without the authorizatio...
AI summary The document outlines environmental and erosion control requirements for the Approval Holder(s) at the Site, including installation and maintenance of erosion and sediment controls, handling of surface water runoff, and restrictions on disturbing riparian vegetation and proximity to watercourses.
CI 50518 CA IR-5 Attachment 10 Page 8 of 14 REDACTED (CONFIDENTIAL INFORMATION REMOVED) constructed off site and moved into place by crane. All work must be conducted in accordance with the documents submitted by the proponent in the appli...
AI summary The document outlines conditions for a watercourse alteration project, including compliance with submitted plans, obtaining necessary approvals, sediment control measures, construction timelines, and environmental mitigation strategies. It also references a Letter of Advice from DFO.
21-HMAR-00478 - Completing the 2021 portion of the project will not require the reservoir to be lowered beyond the normal operating level required and can be conducted without altering operation of the Ruth Falls fishladder. - The project...
AI summary The document discusses the completion of a project related to a reservoir and fish ladder at Ruth Falls, with consideration of environmental impacts and regulatory requirements. The project is expected to be completed by late January 2022 without lowering the reservoir below normal levels. Environmental controls are in place, and potential impacts on aquatic species, including the American Eel, are noted.
Site Specific Mitigation Measures - Isolate the control building worksite from running water by installing non-erodible impermeable barriers/cofferdams capable of withstanding the Q50 flow for the watercourse. - Dewater gradually to reduce...
AI summary The document outlines specific mitigation measures required for a construction project to minimize environmental impacts on aquatic species and habitats. It includes measures such as installing barriers, managing water flow, preventing fish entrainment, and ensuring compliance with the Fisheries Act and other regulations. The proponent is required to notify DFO and maintain compliance throughout the project.
PROJECT OVERVIEW NS Power is proposing refurbishment of the Ruth Falls Dam (the "Project"), located on the Sheet Harbour Hydro System in Sheet Harbour NS, in 2022. This work is necessary in order to address structural and freeboard deficie...
AI summary NS Power is proposing the refurbishment of the Ruth Falls Dam in Sheet Harbour, NS, to address structural issues and meet safety guidelines. The project includes replacing stop log bays with rubber dams, installing a spillway, and lowering the headpond. ECC has requested additional information on water management, contingency planning, and fish protection measures.
CI 50518 CA IR-5 Attachment 11 Page 4 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description system, e.g. as referenced in the submission,...
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and related environmental considerations. NS Power has provided updates on construction schedules, wetland monitoring plans, and mitigation strategies for debris and rock fill. The submission also includes information on fish ladder performance and discharge ranges during drawdown.
CI 50518 CA IR-5 Attachment 11 Page 5 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description a. Based on the information above, provide ECC...
AI summary The document discusses the Ruth Falls Dam Sluice Gate Installation Project, addressing concerns raised by ECC regarding scour observations, site access, construction plans for cofferdams, water management, ice action on temporary structures, and the elevation of the new uncontrolled spillway relative to the minimum operating level of the Ruth Falls Headpond.
CI 50518 CA IR-5 Attachment 11 Page 7 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description the primary method of isolating the existing d...
AI summary The document describes the installation of a sluice gate at the Ruth Falls Dam in Sheet Harbour Hydro System. Temporary cofferdams will be used to isolate the dam for refurbishment and manage water diversion, while the fish ladder and fish bypass will be dewatered during the process.
CI 50518 CA IR-5 Attachment 11 Page 8 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description higher returns are observed in the East River...
AI summary The Ruth Falls Dam Sluice Gate Installation Project involves environmental considerations, including the presence of mercury in local fish species and the observation of Barn Swallow nests. NS Power has received a permit to manage these nests and mitigate their impact during construction.
CI 50518 CA IR-5 Attachment 11 Page 9 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description. It includes a redacted image related to the project.
CI 50518 CA IR-5 Attachment 11 Page 10 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description the Ruth Falls Headpond will be lowered appro...
AI summary The Ruth Falls Dam sluice gate installation project involves lowering the headpond by 18 ft to facilitate construction. This includes dewatering the canal, fishladder, and fish bypass, while maintaining a 35 cfs flow downstream. The drawdown will be managed using the centre vertical lift gate/deep sluice bay, and flow velocities will decrease as the headpond elevation lowers over a 4-day period.
CI 50518 CA IR-5 Attachment 11 Page 11 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The text discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description. A redacted image is referenced on page 16.
Qualified NS Power personnel will be on site during the drawdown to monitor water quality (visual silt) and conduct a fish rescue for any isolated fish in the headpond and canal. The headpond will be subsequently recharged at a controlled...
AI summary The document outlines plans for monitoring water quality and conducting fish rescue during a drawdown, as well as the construction of access roads and cofferdams for refurbishment activities. These measures aim to minimize environmental impact and ensure safe and efficient work conditions.
CI 50518 CA IR-5 Attachment 11 Page 14 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description. A redacted image is also referenced.
4.3 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the w...
AI summary Erosion and sedimentation control measures will be implemented during construction, including the use of hay and silt fencing. NS Power will monitor water quality and has confirmed that past flood events have not caused erosion or scour. Regular inspections and communication with Hydro Operations will ensure proper planning for high inflow periods.
CI 50518 CA IR-5 Attachment 11 Page 16 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description proven to have little effect on sedimentation...
AI summary The document describes the environmental considerations and water management strategies for the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project. It outlines measures to control sedimentation, including the use of pumps, silt fencing, and designated water filtration areas. The project involves minimal excavation and focuses on refurbishing the existing dam structure.
CI 50518 CA IR-5 Attachment 11 Page 17 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description The removal of cofferdam material will take p...
AI summary The document outlines environmental mitigation measures for the Ruth Falls Dam Sluice Gate Installation Project, including siltation monitoring, erosion control plans, and site inspections by NS Power to ensure compliance with environmental regulations and best practices during construction.
CI 50518 CA IR-5 Attachment 11 Page 18 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Grant River Watershed; although, inflows from...
AI summary NS Power proposes to conduct monthly water quality sampling and install a temperature logger at the Ruth Falls Dam headpond to monitor parameters such as temperature, dissolved oxygen, and turbidity. This monitoring will occur from July to November and will use data from the 2017 relicensing period for comparison.
CI 50518 CA IR-5 Attachment 11 Page 19 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description, highlighting the project's scope and potential environmental impacts.
CI 50518 CA IR-5 Attachment 11 Page 20 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 2: Mapped wetlands on Ruth Falls Headpond (2007).
AI summary The document includes a figure showing mapped wetlands on Ruth Falls Headpond from 2007, likely related to environmental assessments or regulatory considerations.
CI 50518 CA IR-5 Attachment 11 Page 21 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Figure 3: NS Department of Lands and Forestry...
AI summary NS Power is proposing a wetland monitoring program to assess potential impacts from a 9-month drawdown of the Ruth Falls Headpond. The program will monitor wetland plant species, soil moisture, water levels, and effects on fish and fish habitat. A third-party consultant will be contracted, and a monitoring plan will be submitted to ECC by March 31, 2022.
CI 50518 CA IR-5 Attachment 11 Page 22 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description or disposed to an approved landfill. Any debr...
AI summary The document discusses the installation project at the Ruth Falls Dam Sluice Gate in Sheet Harbour Hydro System, including environmental considerations and debris disposal guidelines in accordance with NSECC guidelines.
4.7 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refuelling and lubrication shall be in designated ar...
AI summary The section outlines requirements for equipment and machinery near water bodies, including mechanical soundness, safe refuelling practices, storage distances from water, and spill contingency planning.
CI 50518 CA IR-5 Attachment 11 Page 23 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description dewatered reservoir. In the event that archae...
AI summary The text discusses the installation of a sluice gate at the Ruth Falls Dam in the Sheet Harbour Hydro System. It mentions the dewatering of the reservoir and the potential for archaeological resources to be identified during the process. If such resources are found, two rounds of documentation and artifact collection will be conducted.
CI 50518 CA IR-5 Attachment 11 Page 24 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description. A redacted image is referenced but not included in the text.
CI 50518 CA IR-5 Attachment 11 Page 28 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description APPENDIX B – SITE PHOTOS
AI summary This section of the document provides an overview of the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project, including an environmental description and site photos from Appendix B.
CI 50518 CA IR-5 Attachment 11 Page 34 of 34 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description APPENDIX E – NS WATERCOURSE ALTERNATION SIZIN...
AI summary This document is part of a regulatory proceeding related to the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description and a wetland and wetland fish habitat monitoring plan addressed to Nova Scotia Power Inc.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir within the Sheet Harbour Hydroelectric System to accommodate refurbishments at the Ruth Falls Reservoir (the Project). Str...
AI summary Nova Scotia Power Inc. (NSPI) plans to lower the headpond at the Ruth Falls Reservoir temporarily for refurbishments. Strum Consulting was engaged to develop a monitoring plan to assess impacts on wetlands and fish habitat caused by the lowered water levels.
Methodology Wetland monitoring will include detailed vegetative, hydrological, and soil monitoring within the six selected wetlands. Each wetland to be monitored will be delineated prior to the commencement of monitoring activities to ensu...
AI summary The methodology outlines detailed wetland monitoring activities, including vegetative, hydrological, and soil assessments, monitoring well installation, and soil test pits. Monitoring will be conducted during pre- and post-construction periods by a trained biologist during the growing season.
Review of Fish Sampling Results A review of all fish sampling conducted by NSPI will be completed for all data available prior to the commencement of monitoring. The review will involve data compilation of fish species and abundance, infor...
AI summary This section outlines a review of fish sampling results conducted by NSPI prior to the commencement of monitoring. The review includes data compilation on fish species, abundance, migratory periods, and habitat requirements.
PROPOSED SCHEDULE AND REPORTING Annual post-construction monitoring reports will be submitted to Nova Scotia Environment and Climate Change (NSECC) for the five years of post-construction monitoring. Vegetation results shall be provided in...
AI summary The document outlines the proposed schedule and reporting requirements for post-construction monitoring, including annual reports to Nova Scotia Environment and Climate Change and the use of cumulative tables for vegetation results. Tables 4 and 5 detail the monitoring schedules for the Wetland Monitoring Program and Wetland Fish Habitat Monitoring Program.
CI 50518 CA IR-5 Attachment 13 Page 2 of 2 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - o If an instantaneous measurement method is proposed, provide justification for only having one pre-construction monitoring event to establish baselin...
AI summary The document outlines several requests for information related to a project, including justification for monitoring methods, mapping of wetland locations, clarification on project components, rationale for temperature indicators, and a communication plan for property owners. The Environmental Compliance Commission (ECC) has set a deadline for submission.
CI 50518 CA IR-5 Attachment 14 Page 1 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Environmental & Project Description for Construction Activities Addendum Sheet Harbour Hydro System Ruth Falls Dam Refurbishment 2022 CI 50518 CA IR-5...
AI summary This document provides an environmental and project description for the Ruth Falls Dam Refurbishment in the Sheet Harbour Hydro System in 2022, including an addendum and details about the sluice gate installation project.
PROJECT OVERVIEW NS Power is proposing refurbishment of the Ruth Falls Dam (the "Project"), located on the Sheet Harbour Hydro System in Sheet Harbour NS, in 2022. This work is necessary in order to address structural and freeboard deficie...
AI summary NS Power is proposing to refurbish the Ruth Falls Dam in Sheet Harbour, NS, to address structural issues and meet safety guidelines. The project involves replacing stop log bays with rubber dams and vertical lift gates, and includes dewatering activities. An addendum was submitted to the NS Department of Environment and Climate Change to address incomplete application requirements.
CI 50518 CA IR-5 Attachment 14 Page 4 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description naturally from the sluice bay opening downstre...
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project, focusing on cofferdam standards, water discharge capacity, construction scheduling, wetland monitoring methods, and the location of monitoring sites. NS Power provides references to sections in the document for detailed information.
CI 50518 CA IR-5 Attachment 14 Page 5 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description - 6. Provide an updated 'Figure 1 – Site Plan...
AI summary The document discusses updates to the Site Plan for the Sheet Harbour Hydro System, clarifications on project components such as the bypass and modular bridge, the rationale for using 23°C as a temperature indicator, and the need for a communication plan for property owners near the headpond. These updates are in response to various queries from regulatory bodies.
CI 50518 CA IR-5 Attachment 14 Page 6 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The document describes the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description. A redacted image is referenced on page 57.
CI 50518 CA IR-5 Attachment 14 Page 7 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description concrete gravity bulkhead sections that abut e...
AI summary The text describes the Ruth Falls Dam Sluice Gate Installation Project in Sheet Harbour Hydro System, focusing on environmental considerations and fish migration. The project involves replacing the stoplog-controlled sluiceway with vertical lift gates, maintaining minimum water levels for fish passage, and ensuring compliance with environmental regulations. Mercury contamination in fish and ongoing water quality improvements are also noted.
CI 50518 CA IR-5 Attachment 14 Page 8 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description In July 2021, NS Power staff observed a Barn S...
AI summary In July 2021, NS Power observed Barn Swallow nests near the Ruth Falls Dam and received a Species at Risk permit from the NS Department of Lands and Forestry. The permit allows for nest removal before March 31, 2022, and requires the installation of alternative nesting structures during construction.
3.0 REGULATORY PERMITS/APPROVALS In addition to the Watercourse Alteration Approval required in accordance with Section 5(A)(1)(c) of the Activities Designation Regulations of the Environment Act , an authorization under Section 35(2)(b) o...
AI summary The document outlines the regulatory permits and approvals required for a project, including a Watercourse Alteration Approval, a variance to an existing water approval, and a Species At Risk permit. It also details adjustments to water management practices during construction, particularly concerning fish passage and salmon flow requirements.
CI 50518 CA IR-5 Attachment 14 Page 11 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description The drawdown flow will be directed through ar...
AI summary The document describes the Ruth Falls Dam Sluice Gate Installation Project, focusing on the drawdown flow process, which directs water through normal flowage channels and maintains fish passage. The headpond level is reduced from 109.25 ft to 91 ft over a 4-day period, with Table 1 showing decreased flow velocities as the elevation lowers.
CI 50518 CA IR-5 Attachment 14 Page 12 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Once the drawdown is completed, two access ro...
AI summary The document describes the construction of access roads and a temporary bridge for the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project. It outlines the design, materials, and environmental considerations for the access roads and bridge, including storm management and contingency planning.
CI 50518 CA IR-5 Attachment 14 Page 14 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Fish will have the ability to move downstream...
AI summary The Fish will be able to move upstream and downstream through the sluice bay during construction, except when the centre sluice bay gate is under construction. The passive opening under the bridge allows fish to move freely downstream. The minimum 35 cfs discharge requirement will be maintained throughout construction, ensuring no negative impacts to water passage.
4.2 Contingency Planning The hydrological information provided in the application submission references the Sheet Harbour system flood study, which was completed as part of NS Power's dam safety program in addition to the system dam safety...
AI summary The text discusses contingency planning in the context of the Ruth Falls Dam refurbishment, referencing a flood study conducted as part of NS Power's dam safety program. The study contains confidential information and is not typically shared in watercourse alteration applications.
CI 50518 CA IR-5 Attachment 14 Page 15 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description sluiceway bays, as required for the sequencin...
AI summary The document discusses the installation of a sluice gate at the Ruth Falls Dam as part of the Sheet Harbour Hydro System project. It outlines measures to manage water levels during construction, including the use of sluice bays, monitoring of inflows, and contingency plans for unexpected high inflows or extreme weather events.
CI 50518 CA IR-5 Attachment 14 Page 16 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document provides an environmental description of the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project, including a redacted image related to the project.
4.3 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the w...
AI summary The document outlines erosion and sedimentation control measures for a hydro project, including the use of silt fencing, hay, and pumps to manage sediment-laden water. It notes that past flood events have not caused erosion or scour, and that regular inspections confirm this. The project involves minimal excavation and focuses on refurbishing the existing dam structure.
CI 50518 CA IR-5 Attachment 14 Page 17 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Figure 1: Potential locations for water filtr...
AI summary The document outlines environmental mitigation measures for the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project, including siltation monitoring, erosion and sedimentation control plans, and responses to weather events to minimize environmental impact.
CI 50518 CA IR-5 Attachment 14 Page 18 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description NS Power will also require the general civil...
AI summary NS Power will conduct daily site inspections and weekly environmental inspections during the construction of the Ruth Falls Dam Sluice Gate Installation Project to ensure compliance with regulatory requirements and best practices.
4.4 Water Quality NS Power conducts water quality surveys as part of the hydro relicensing program, the process by which the water approvals for storage/withdrawal are renewed for each hydro system. Relicensing studies for the Sheet Harbou...
AI summary NS Power is conducting water quality surveys as part of the hydro relicensing program for the Sheet Harbour Hydro System. The headpond has acidic conditions and is classified as meso-eutrophic or eutrophic. NS Power proposes monthly water quality sampling from July to November to monitor parameters such as temperature, dissolved oxygen, and nutrient content.
CI 50518 CA IR-5 Attachment 14 Page 19 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description In addition, NS Power will install a temperat...
AI summary NS Power plans to install a temperature logger in the Ruth Falls Dam sluice gate to monitor water temperature continuously. The logger will use 23 degrees Celsius as a baseline for normal temperatures in the headpond, based on measurements taken during hydro relicensing.
CI 50518 CA IR-5 Attachment 14 Page 20 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description, including a redacted image related to the project.
CI 50518 CA IR-5 Attachment 14 Page 22 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description Figure 3: NS Department of Lands and Forestry...
AI summary NS Power is implementing a wetland monitoring program to assess potential impacts from a 9-month drawdown of the Ruth Falls Headpond. A third-party consultant will monitor wetland plant species, soil moisture, water levels, and fish habitat, with the plan submitted to the ECC for review.
CI 50518 CA IR-5 Attachment 14 Page 23 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description As per the Wetland Monitoring Plan, in advanc...
AI summary The document describes the Wetland Monitoring Plan for the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project. It outlines the selection of six wetlands for baseline monitoring, considering factors such as wetland type, geographic spread, size, species diversity, and fish habitat. Two monitoring events are planned to capture baseline water levels.
4.6 Construction Material and Debris Measures will be taken to prevent any materials used in the various work activities from entering the watercourse. All such materials will be applied in a controlled manner and any excess material will...
AI summary The text outlines measures to prevent construction materials and debris from entering watercourses, ensuring controlled application and proper disposal on NS Power property or approved landfills in accordance with NSECC guidelines.
4.7 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refueling and lubrication shall be in designated are...
AI summary The text outlines requirements for equipment and machinery operations near water bodies, emphasizing mechanical integrity, fuel and lubrication storage distances, oil spill contingency planning, and compliance with environmental regulations.
CI 50518 CA IR-5 Attachment 14 Page 24 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and its environmental description, including a redacted image related to the project.
4.8 Rehabilitation Following any excavation and placement activities, areas disturbed by machinery or equipment will be returned to pre-construction condition. Any exposed soil areas will be stabilized to prevent erosion. In the event that...
AI summary The section outlines requirements for rehabilitating areas disturbed during construction, including stabilizing exposed soil and taking temporary measures to prevent erosion if long-term solutions cannot be implemented immediately.
CI 50518 CA IR-5 Attachment 14 Page 25 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description at the One Window Meeting with KMKNO. NS Powe...
AI summary NS Power has been engaging with various Indigenous groups and regulatory bodies regarding the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project. They have provided regular updates and are working on an offsetting plan for potential environmental impacts. The project was deferred to 2021, and engagement with Millbrook First Nation has been re-initiated.
CI 50518 CA IR-5 Attachment 14 Page 26 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an environmental description. A redacted image is referenced, indicating the presence of confidential or sensitive information.
CI 50518 CA IR-5 Attachment 14 Page 30 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description APPENDIX B – SITE PHOTOS
AI summary This document provides an overview of the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project, including an appendix with site photos. The content is redacted, indicating that some information has been removed due to confidentiality.
CI 50518 CA IR-5 Attachment 14 Page 36 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description APPENDIX D – ENGINEERING DRAWINGS CI 50518 CA...
AI summary The document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes engineering drawings. It is part of a regulatory proceeding in Nova Scotia.
CI 50518 CA IR-5 Attachment 14 Page 58 of 59 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and Environmental Description APPENDIX E – NS WATERCOURSE ALTERNATION SIZIN...
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Sluice Gate Installation Project and includes an appendix with sizing calculations related to watercourse alternation.
CI 50518 CA IR-5 Attachment 16 Page 4 of 9 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - i. The Approval Holder(s) shall bear all expenses incurred in carrying out the environmental monitoring required under the terms and conditions of thi...
AI summary The document outlines various requirements and responsibilities for the Approval Holder(s) related to environmental monitoring, construction oversight, and compliance with regulatory standards. It includes obligations such as sample collection, laboratory analysis, and submission of completion forms.
5. Surface Water - a. The Approval Holder(s) shall ensure the Site is developed and maintained to prevent contaminants from being discharged into a water resource or beyond the property boundary. - b. Monitoring during construction: The Ap...
AI summary The document outlines requirements for managing surface water contamination during construction, including water quality limits for suspended solids, erosion control plans, and monitoring obligations for the Approval Holder(s) to ensure compliance with environmental standards.
CI 50518 CA IR-5 Attachment 16 Page 6 of 9 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - e. No authority is granted by this Approval to enable the Approval Holder(s) to discharge surface water onto adjoining lands without the authorization...
AI summary The document outlines requirements for erosion and sediment control, surface water management, and environmental compliance during construction activities, including installation of controls, inspection protocols, and restrictions on site disturbance near water resources.
CI 50518 CA IR-5 Attachment 19 Page 7 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Water levels in Ruth Headpond can fluctuate between the...
AI summary The Ruth Falls Dam refurbishment project involves adjusting the minimum operating level of the Ruth Headpond to 109.25 ft, aligning with engineering drawings and Dam Safety Reviews. The project includes maintaining ecological flows for fish passage and addressing discrepancies in datum measurements. Environmental considerations include water levels, fish species, and spill management during construction.
CI 50518 CA IR-5 Attachment 19 Page 8 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The Ruth Falls Headpond was sampled by NS Power in 2017...
AI summary The Ruth Falls Dam refurbishment project involves environmental considerations, including fish species sampling, mercury contamination, wetland identification, and protection of Barn Swallow nests. Environmental assessments have been conducted to ensure compliance with conservation regulations and to mitigate potential impacts on local ecosystems.
CI 50518 CA IR-5 Attachment 19 Page 11 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description management plan water will be free flowing through the...
AI summary The Ruth Falls Dam Refurbishment Project involves a management plan ensuring free-flowing water through the sloplog/sluiceway bay. A Species at Risk permit will be obtained under the Wildlife Act and Endangered Species Act, and an authorization from Transport Canada's Navigation Protection Program is required for construction activities.
CI 50518 CA IR-5 Attachment 19 Page 12 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary This document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour, Nova Scotia, and includes an environmental description. A redacted image is also included, likely showing details related to the project or its environmental impact.
CI 50518 CA IR-5 Attachment 19 Page 14 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description weather and precipitation conditions. The access roads...
AI summary The text discusses the Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project, noting that access roads pose very low risk to the project and the environment. Weather and precipitation conditions are also mentioned as relevant factors.
CI 50518 CA IR-5 Attachment 19 Page 17 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The maximum mean annual flows for the Ruth Falls headpo...
AI summary The text discusses the calculation of maximum mean annual flows for the Ruth Falls headpond using a 2008 flood study, a 6-hour sub basin unit hydrograph, and rainfall data from Shearwater Airport. The results are presented in Table 3.
CI 50518 CA IR-5 Attachment 19 Page 18 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The right downstream access road will be reinforced on...
AI summary The document details the construction and environmental considerations for the Ruth Falls Dam refurbishment project, including measures to manage water levels, infrastructure adjustments during high return period rain events, and temporary structures that can be removed to accommodate increased water flow.
CI 50518 CA IR-5 Attachment 19 Page 20 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description - evaluate whether ecological flows are sufficient for...
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour, focusing on measures to ensure optimal fish passage through the fish ladder and downstream bypass. It outlines adjustments to ecological flows, gate configurations, and modifications to the fish ladder and louver system to support fish migration.
CI 50518 CA IR-5 Attachment 19 Page 21 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description For full hydraulic modeling results and interpretation...
AI summary The document discusses the Ruth Falls Dam Refurbishment Project under the Sheet Harbour Hydro System, mentioning environmental considerations and referencing hydraulic modeling results from Thaumus Environmental found in Appendix F.
5.3 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the w...
AI summary NS Power plans to use erosion and sedimentation control measures, including hay and silt fencing, to manage sediment during construction. Silt-laden water will be pumped to areas with vegetation for filtration. Regular inspections and communication with Hydro Operations will ensure safety during high inflow periods. Rockfill cofferdams and pumps will further mitigate sedimentation risks.
CI 50518 CA IR-5 Attachment 19 Page 24 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The proposed scope of work for the Project involves min...
AI summary The Ruth Falls Dam Refurbishment Project involves minimal excavation and focuses on refurbishing the existing dam structure. Water management strategies and sediment control measures, such as silt fencing and water filtration areas, will be used during construction. Two potential filtration areas have been identified for further field verification.
CI 50518 CA IR-5 Attachment 19 Page 25 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The removal of access road material will take place wit...
AI summary The Ruth Falls Dam Refurbishment Project involves the removal of access road material and implementation of erosion and sedimentation control measures. NS Power will monitor siltation, require a site-specific erosion and sedimentation control plan, and conduct inspections to ensure compliance with environmental regulations and best practices.
CI 50518 CA IR-5 Attachment 19 Page 26 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description less than 9.8 ft (3 m). At an elevation of 91.0 ft, the...
AI summary NS Power is proposing monthly water quality sampling at the Ruth Falls Headpond during the Sheet Harbour Hydro System refurbishment project. The sampling will occur from July to November and will monitor parameters such as temperature, dissolved oxygen, and nutrient content to assess the impact of the drawdown on water quality.
CI 50518 CA IR-5 Attachment 19 Page 29 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Given the short duration of the potential change to wat...
AI summary NS Power is undertaking the Ruth Falls Dam Refurbishment Project, which involves a 9-month drawdown of the Ruth Falls Headpond. While short-term impacts on wetlands are anticipated, NS Power is uncertain about the extent of these impacts and has contracted a third-party consultant to monitor wetland health, water levels, and fish habitat. Six specific wetlands will be monitored as part of this effort.
CI 50518 CA IR-5 Attachment 19 Page 30 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 4: Mapped wetlands on Ruth Falls Headpond (2007). Proposed Wetland Monitoring locations are highlighted in red (6 locations)
AI summary The document includes a figure showing mapped wetlands on Ruth Falls Headpond from 2007, with proposed wetland monitoring locations highlighted in red. The figure is part of a regulatory proceeding in Nova Scotia.
CI 50518 CA IR-5 Attachment 19 Page 31 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Wetlands selected for monitoring were chosen based on t...
AI summary The document outlines the selection criteria for wetlands to be monitored as part of the Ruth Falls Dam Refurbishment Project. Six wetlands were chosen based on their representativeness, geographic spread, biodiversity, and accessibility. Baseline monitoring was conducted in July 2022, with results included in an updated monitoring plan.
5.7 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refueling and lubrication shall be in designated are...
AI summary The document outlines requirements for equipment and machinery operations near water bodies, emphasizing mechanical integrity, fuel and lubrication storage, spill prevention, and contingency planning to mitigate environmental risks.
CI 50518 CA IR-5 Attachment 19 Page 32 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary This document provides an environmental description of the Ruth Falls Dam Refurbishment Project in the Sheet Harbour Hydro System. It includes a redacted image and is part of a larger regulatory proceeding.
CI 50518 CA IR-5 Attachment 19 Page 34 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including its environmental description. It includes a redacted image referenced as page 170, Picture 3.
ISSUED FOR CONSTRUCTION REFERENCE DESCRIPTION A X,X,X,X,X X X,X,X X,X X,X,X SEAL DEPARTMENTAL APPROVALS SCALE Nova Scotia IV. THE OWNER MAY CHOOSE TO EMPLOY AN INDEPENDENT THIRD PARTY TESTING AGENCY TO PERFORM QUALITY ASSURANCE (QA) TESTIN...
AI summary The document outlines requirements for erosion and sediment control during construction, including compliance with local and provincial standards, submission of plans for approval, and removal of temporary measures within 30 days after final site stabilization or upon authorization by the owner.
CI 50518 CA IR-5 Attachment 19 Page 69 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX E – Wetland Monitoring Plan
AI summary This document provides an appendix to the environmental description of the Ruth Falls Dam Refurbishment Project, specifically focusing on a Wetland Monitoring Plan. It includes a redacted page from a regulatory proceeding and a picture referenced as '_page_5_Picture_3.jpeg'.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir (the Reservoir) within the Sheet Harbour Hydroelectric System to accommodate refurbishments (the Project). Strum Consultin...
AI summary Nova Scotia Power Inc. (NSPI) plans to lower the headpond at the Ruth Falls Reservoir temporarily for refurbishments. Strum Consulting was engaged to develop a monitoring plan to assess the impact on wetlands and fish habitat caused by the change in water levels.
CI 50518 CA IR-5 Attachment 19 Page 71 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960
AI summary The document outlines a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir project, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022, under project number 21-7960.
CI 50518 CA IR-5 Attachment 19 Page 72 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960...
AI summary The document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project by Nova Scotia Power Inc. It includes pre-construction and post-construction monitoring phases to evaluate changes in wetland characteristics due to lowered water levels.
Methodology Wetland monitoring will include detailed vegetative, hydrological, and soil monitoring within the six selected wetlands. Each wetland to be monitored was delineated prior to the commencement of monitoring activities to ensure t...
AI summary The methodology for wetland monitoring includes detailed assessments of vegetation, hydrology, and soil within six selected wetlands. Vegetative monitoring involves quadrats along transects, soil test pits, and standardized placement of monitoring wells and vegetation plots. Photographs are taken for future comparison, and monitoring occurs during pre- and post-construction periods.
CI 50518 CA IR-5 Attachment 19 Page 73 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960...
AI summary This section outlines a monitoring plan for wetland and wetland fish habitat at the Ruth Falls Reservoir, developed by Nova Scotia Power Inc. The plan includes timing of monitoring events and methods for assessing vegetation and biodiversity, with an emphasis on comparing data across years and accounting for drawdown timing and growing seasons.
CI 50518 CA IR-5 Attachment 19 Page 75 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960...
AI summary This document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project by Nova Scotia Power Inc., including baseline conditions and further surveys during drawdown and post-construction.
Baseline Monitoring Results Initial baseline monitoring was conducted on July 4-5, and September 6, 2022. All wetlands were accessed via boat over the Reservoir, and each wetland was accessed successfully, as locations provided by the JW (...
AI summary Baseline monitoring of wetlands was conducted in 2022 using WESP-AC protocols. Wetlands were accessed by boat, and monitoring wells and vegetation plots were installed. One wetland (WL17) was identified as an island within the reservoir. Results from the assessments are detailed in attachments and drawings.
PROPOSED SCHEDULE AND REPORTING Annual post-construction monitoring reports will be submitted to Nova Scotia Environment and Climate Change (NSECC) for the five years of post-construction monitoring. Vegetation results shall be provided in...
AI summary The document outlines the requirement for annual post-construction monitoring reports to be submitted to Nova Scotia Environment and Climate Change (NSECC) over a five-year period. Vegetation results will be presented in a cumulative table for inter-annual comparison. Tables 6 and 7 detail the monitoring and reporting schedules for the Wetland Monitoring Program and Wetland Fish Habitat Monitoring Program, respectively.
Table6: Monitoring and Reporting Schedule for Wetland Monitoring Monitoring Event Wetland and Wetland Fish Habitat Monitoring WESP-AC Reporting Submission to NSECC Pre-construction Baseline ✓ ✓ During Construction ✓ Memo Post-construction...
AI summary This table outlines the monitoring and reporting schedule for wetland monitoring during and after construction. Monitoring events include baseline data collection before construction, ongoing monitoring during construction, and annual follow-ups for five years post-construction. Post-construction data is compared to baseline data to evaluate impacts on vegetation, hydrology, and soils, with a follow-up WESP-AC program and consultation with NSECC after Year 5.
CLOSURE Thank you for the opportunity to develop this Wetland and Wetland Fish Habitat Monitoring Plan. If you have any questions, please contact us. Thank you, [[email protected]](mailto:[email protected]) [[email protected]](mailto:sduncan...
AI summary The document is a closure message from Angus Doane and Natasha Myers, environmental scientists, thanking the recipient for the opportunity to develop a Wetland and Wetland Fish Habitat Monitoring Plan and offering contact information for further questions.
REFERENCES Environmental Services Nova Scotia Power. 2018. Sheet Harbour Hydro System Relicensing Report . Jacques Whitford. 2007. Report – Vegetation Surveys at the Sheet Harbour Hydroelectric System . Project No. 1026751. NSLC Adopt a St...
AI summary The document provides references to various environmental and fish habitat assessment reports, including studies on the Sheet Harbour Hydro System, fish habitat suitability, and procedures for mapping fish habitats in the Bay of Quinte.
CI 50518 CA IR-5 Attachment 19 Page 94 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3 # Indicators Condition Choices Data Definitions/Explanations 15 >100 hectares. 1 16 OF3 Ponded Water & Wetland Within 1 km. The area of wetlands an...
AI summary This section outlines indicators and condition choices related to wetland and ponded water areas, as well as the size of nearby vegetated tracts. It includes definitions and explanations for assessing environmental conditions, such as the area of wetlands and surface water within 1 km of a site and the size of the largest nearby vegetated tract.
Scores will appear below after data are entered in worksheets OF, F, and S. See Manual for definitions and descriptions of how scores were computed. Water Storage & Delay (WS) Stream Flow Support (SFS) Water Cooling (WC) 7.98 1.60 10.00 4....
AI summary The text presents a scoring system for various ecological functions and benefits of wetlands, including water storage, sediment retention, phosphorus removal, and habitat support. Scores are normalized, and the data indicate varying levels of function and benefit, with some functions showing low scores and others showing higher scores. The Habitat Rule is not satisfied based on the provided data.
CI 50518 CA IR-5 Attachment 19 Page 112 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 5 Investigator Name: Darcy Kavanagh & Angus Doane Date o...
AI summary This document is a field assessment form for the Ruth Falls Wetland 5 conducted on July 4, 2022, by investigators Darcy Kavanagh and Angus Doane. The assessment includes details about the site, such as its location, size, and the extent of the area visited. The form is part of the WESP-AC version 2 process for wetland assessments in Nova Scotia.
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 The area of wetlands and surface water ponded during most of the growing season that is both (1) in or adjacent to the AA and (2) within 1 km is: <0.01 hectare (about 10 m x 10 m). 0 0.01 - 0.1...
AI summary The text discusses the assessment of environmental factors related to a project, focusing on wetlands, surface water, and vegetated areas. It outlines specific criteria for measuring the size of vegetated patches and the presence of nitrogen-fixing plants within a 1 km radius of the area of interest.
CI 50518 CA IR-5 Attachment 19 Page 135 of 423 2 Water subsidies from wastewater effluent, septic system leakage, snow storage areas, or irrigation. Regular removal of surface or groundwater for irrigation or other consumptive use. Flow re...
AI summary The text outlines various activities and structures that may impact wetlands, including water subsidies, flow regulation, excavation, artificial drains, logging, and subsidence. These factors are likely considered in environmental compliance and regulatory processes.
CI 50518 CA IR-5 Attachment 19 Page 152 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 15 Darcy Kavanagh & Investigator Name: Angus Doane Date...
AI summary This document is a field assessment form for a wetland site in Sheet Harbour, Nova Scotia, conducted on July 4, 2022, by investigators Darcy Kavanagh and Angus Doane. The assessment covers a 0.271124-hectare area and includes details about the site, investigator, and assessment procedures.
CI 50518 CA IR-5 Attachment 19 Page 192 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 19 Investigator Name: Darcy Kavanagh & Angus Doane Date...
AI summary This document is a field assessment form for the Ruth Falls Wetland 19 conducted on July 5, 2022, by Darcy Kavanagh and Angus Doane. It includes details such as the site's location, the investigator's name, and the assessment methodology used (WESP-AC version 2). The form indicates that a full assessment of the wetland was conducted, and the investigators have extensive experience in wetland assessments.
Scientific Name Common Name Baseline (July 2022) % Baseline (September 2022) % Notes Scientific Name Common Name Baseline (July 2022) % Baseline (September 2022) % Notes
AI summary The text presents a table with scientific and common names of species, along with baseline percentages for July and September 2022, and notes. The content appears to be related to environmental or ecological data, likely from a regulatory proceeding involving environmental compliance or monitoring.
Flow Assessment Spill flow data was available from 2015 to 2022. The full timeseries of the spill flow data is presented below in Figure 1: CI 50518 CA IR-5 Attachment 19 Page 231 of 423 Figure 1: Spill flow Timeseries from 2015 to 2022 at...
AI summary The document discusses spill flow data from 2015 to 2022 at Ruth Falls Dam, noting increased spills in 2021 and 2022 due to construction. Data from those years was excluded to reflect typical conditions. Flow duration curves and seasonal analysis were used to assess fish passage conditions, with adjustments made to weir configurations to improve fish passage.
CI 50518 CA IR-5 Attachment 19 Page 331 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) must be immediately below the dam. The supplemental flow events are intended to complement significant high flow events (i.e., ≥ 24 mm of rain in 24...
AI summary The document discusses supplemental flow events designed to assist Atlantic Salmon migration by creating suitable flow conditions over river rock sills. It also outlines a literature review conducted by Thaumas on the swimming abilities and migration behaviors of various fish species, including Gaspereau, Brook Trout, and American Eels, relevant to the site's dam.
CI 50518 CA IR-5 Attachment 19 Page 332 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Selected Species Migration Times/Needs Past the Dam Migration Requirements Assessed Typical Size Range (cm) Assessed Size (cm) - water depth - behav...
AI summary The document presents a table analyzing the migration times, needs, and requirements for selected fish species, including Atlantic Salmon and American Eel, with specific details on water depth, behavior, swimming ability, and size ranges. The table also includes assessed sizes for each species.
Closure This memo has been prepared for the sole benefit of NSP based on the information provided by Thaumas Environmental Consultants Ltd. The memo may not be relied upon by any other person or entity without the express written consent o...
AI summary This memo, prepared for NSP by Thaumas Environmental Consultants Ltd. and reviewed by CBCL, outlines findings and recommendations related to a 3D modelling and fish passage assessment project. The document is not to be relied upon by third parties without consent from CBCL or NSP.
CI 50518 CA IR-5 Attachment 19 Page 381 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX G – Fish Passage Assessment
AI summary This section of the document discusses the Fish Passage Assessment for the Ruth Falls Dam Refurbishment Project as part of the Sheet Harbour Hydro System. It includes an appendix that evaluates the impact of the project on fish passage.
CI 50518 CA IR-5 Attachment 19 Page 392 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Kailey Osborne, Environmental Scientist Nova Scotia Power [[email protected]](mailto:[email protected]) January 31, 2023 Re: Concept...
AI summary Kailey Osborne from Nova Scotia Power is providing feedback on the Concept Design Report for the Downstream Passage of Silver Stage Eels at Ruth Falls Dam. The report is in draft form and relates to environmental considerations.
CI 50518 CA IR-5 Attachment 19 Page 396 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Louvers can be very effective at guiding all fish including eels to a bypass if properly designed (Beck 2020) and modeling conducted at the Alden Re...
AI summary The document discusses the effectiveness of louvers in guiding fish, particularly eels, to bypass structures at Ruth Falls. It references studies by Beck (2020), Allen (2005), and Amaral (2003), which highlight the importance of design factors such as guiding angle and the inclusion of a bottom barrier (overlay) to improve eel fish guidance efficiency (FGE), which is estimated to be in the 90% range at Ruth Falls.
CI 50518 CA IR-5 Attachment 19 Page 399 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) the Alden modeling (Allen et al 2005) that indicates the velocities are good for guiding the eels to the bypass both at the bottom and along the lou...
AI summary The document discusses the effectiveness of louvers in guiding eels to a bypass and highlights the need for design changes and modifications to improve passage efficiency, particularly at the bottom and near the surface outlet. Observations by NSPI staff indicate that eels are successfully reaching the bypass entrance, but further checks and repairs are needed during dam construction.
6. Conclusions - 1) The installation of a ramp and bottom walls along the louver will greatly improve entrance conditions for eel and other benthic species traveling along the bottom. This option would provide passage for yellow stage eels...
AI summary The document discusses the installation of a ramp and bottom walls along a louver to improve fish passage, particularly for eels and other benthic species. It highlights the importance of designing the bypass entrance to prevent upstream fish movement and the trade-offs between flow velocity and fish passage effectiveness.
CI 50518 CA IR-5 Attachment 19 Page 404 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - 3) The bypass pipe outfall drop to the river and plunge pool as currently operating meets the drop and depth requirements to ensure it is safe for...
AI summary The document discusses modifications to a bypass pipe outfall and louvers to improve eel passage and overall aquatic species safety. It highlights the need for condition assessments, repairs, and monitoring studies post-modifications. The current design has weaknesses for benthic species like eels, and proposed changes aim to address these issues and bring the system up to new standards.
3. Modern Eel Passes Generally, technical upstream fishways, such as fish ladders and fish lifts, are ineffective at passing juvenile eels. Therefore, specialized eel pass structures are required to provide a path for them over the dam (Vo...
AI summary Modern eel passes are specialized structures designed to help juvenile eels navigate dams. They consist of linear channels with climbing substrate and pumped water flow, and are often enclosed to protect eels from predators. The entrance is designed to accommodate varying water levels over extended periods.
CI 50518 CA IR-5 Attachment 20 Page 2 of 2 REDACTED (CONFIDENTIAL INFORMATION REMOVED) • Vegetation monitoring plots in Wetlands 5 and 16 appear to be outside the delineated wetland boundary. Provide confirmation that the wetland boundarie...
AI summary The Environment and Climate Change (ECC) is requesting confirmation regarding the location of vegetation monitoring plots in Wetlands 5 and 16, specifically whether they are within the delineated wetland boundaries. The request must be submitted by August 25, 2023, with a warning that failure to comply may result in application rejection under Section 7 of the Approval and Notification Procedure Regulations.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) CI 50518 CA IR-5 Attachment 21 Page 2 of 465 Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project and its environmental description, including a reference to a page from a technical report or visual documentation.
Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including its environmental description.
CI 50518 CA IR-5 Attachment 21 Page 6 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project under the Sheet Harbour Hydro System, including its environmental description. It outlines the scope of the project and its potential environmental impacts.
NSECC Information Request Response Location The fishway modeling provided in the submission recommended the replacement of the lower non-technical fishway weirs, and the removal of rock material and some flattening. It is likely the footpr...
AI summary The document contains information requests and responses related to environmental and engineering aspects of a refurbishment project. Requests include updated fishway modeling, flood condition assessments, storage capacity quantification, and sediment monitoring plans. NS Power assumes previous incomplete letters are no longer relevant.
CI 50518 CA IR-5 Attachment 21 Page 7 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Governor Reservoir is located at the head waters of Twel...
AI summary The document describes the Sheet Harbour Hydro System, including the Ruth Falls Dam Refurbishment Project and the environmental context of the area. It outlines the hydrological features of the system, the location and function of key reservoirs and generating stations, and the fish passage structures at the Ruth Falls Dam.
CI 50518 CA IR-5 Attachment 21 Page 8 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description between April 1-November 30 as 109.4 ft. The engineering...
AI summary The Ruth Falls Dam refurbishment project involves adjusting the dam's structure and ensuring compliance with ecological maintenance flows. The project maintains the current minimum operating level of the reservoir. Ecological considerations include maintaining flows for fish passage and addressing water quality concerns. Mercury contamination has been observed in certain fish species, but no invasive species or critical habitat for at-risk aquatic species were found.
CI 50518 CA IR-5 Attachment 21 Page 9 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description In July 2021, NS Power staff observed a Barn Swallow nes...
AI summary The document discusses the environmental considerations of the Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project, including the presence of Barn Swallow nests and wetland identification. NS Power obtained a SAR permit for nest removal and installed alternative nesting structures. Wetland assessments from 2007 and 2023 indicate no rare or endangered species were found.
CI 50518 CA IR-5 Attachment 21 Page 10 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description - Dewatering of the Ruth Falls fishladder and canal and...
AI summary The text describes the Ruth Falls Dam Refurbishment Project, including activities such as dewatering, installation of new structures, fishway improvements, and demobilization. The project involves environmental considerations and infrastructure upgrades at the dam site.
2.3 Construction Schedule The Project is scheduled to take approximately 9 months to complete starting with the installation of the downstream access roads and temporary bridge in early July 2024. After the water is drawn down, the install...
AI summary The Project is scheduled to take approximately 9 months, starting with the installation of downstream access roads and a temporary bridge in early July 2024. The drawdown of the reservoir will occur after July 10th, taking about 8 days, with additional time incorporated to ensure controlled drawdown and minimize environmental impact.
CI 50518 CA IR-5 Attachment 21 Page 13 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including an environmental description and a redacted image. It appears to be part of a regulatory proceeding involving infrastructure and environmental considerations.
CI 50518 CA IR-5 Attachment 21 Page 14 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project under the Sheet Harbour Hydro System, including its environmental description. It is part of a regulatory proceeding and contains confidential information that has been redacted.
CI 50518 CA IR-5 Attachment 21 Page 15 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary This document provides information on the Ruth Falls Dam Refurbishment Project in Sheet Harbour, including environmental considerations related to the hydro system. The content includes a redacted image and is part of a larger regulatory proceeding.
CI 50518 CA IR-5 Attachment 21 Page 18 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description NS Power believes that by having 9 ft of headpond capac...
AI summary NS Power is refurbishing the Ruth Falls Dam sluiceway, ensuring water level management during construction. Emergency measures, such as using the open gate bays and pumping water around the construction area, are in place to maintain minimum discharge requirements and allow fish passage. The project includes contingency planning for extreme weather events.
CI 50518 CA IR-5 Attachment 21 Page 24 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Figure 3: Site diagram outlining refurbishments associa...
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including a site diagram that outlines refurbishments related to upstream and downstream fish passage. The text is part of a regulatory proceeding and includes confidential information that has been redacted.
Downstream Louver System The assessment of downstream passage included looking at the existing infrastructure to evaluate the effectiveness of a louvre system at facilitating downstream passage for species that would be required to move do...
AI summary The document discusses the assessment of a downstream louver system at a dam to improve fish passage. It outlines the need for repairs, the installation of a trap funnel and bottom orifices, and the recommendation of a ramp to aid fish migration. These improvements aim to meet fish passage engineering criteria and ensure the system supports fish life cycles.
CI 50518 CA IR-5 Attachment 21 Page 25 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description dwelling species such as American eel, Brown bullhead,...
AI summary The text discusses the environmental considerations of the Ruth Falls Dam Refurbishment Project, including measures to protect fish species such as American eel and Brown bullhead, and the realignment of the bypass outfall to meet water depth criteria for fish passage.
5.3 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the w...
AI summary NS Power outlines measures to control erosion and sedimentation during construction, including the use of silt fencing and clean rock materials. Regular monitoring and past operational success suggest no significant erosion or scour risks during high flood events. Communication with Hydro Operations and use of pumps will further mitigate sedimentation concerns.
CI 50518 CA IR-5 Attachment 21 Page 27 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The proposed scope of work for the Project involves min...
AI summary The Project involves minimal excavation and focuses on refurbishing the existing concrete dam structure. Erosion and sedimentation control will be managed through water management strategies, silt fencing, and temporary water filtration areas. Potential locations for filtration areas are identified on NS Power property and will be field verified in spring 2023.
CI 50518 CA IR-5 Attachment 21 Page 28 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description The removal of access road material will take place wit...
AI summary The document outlines environmental mitigation measures for the Ruth Falls Dam Refurbishment Project, including erosion and sedimentation control, siltation monitoring, and site inspections. NS Power will oversee these efforts to ensure compliance with regulatory requirements and best practices during construction.
5.3.1 Sediment Release Monitoring Plan NS Power will implement a regular water quality monitoring program. The water quality checks will be completeddaily to assess turbidity levels in the river downstream of the construction area. During...
AI summary NS Power will implement a daily water quality monitoring program to assess turbidity levels in the river downstream of the construction area. A threshold of 8 ntu has been set, and if exceeded, work will halt until levels return to acceptable limits. Visual inspections will also be conducted to detect silt discoloration.
CI 50518 CA IR-5 Attachment 21 Page 29 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description inspections will be documented with photos. Should visu...
AI summary The document discusses the Ruth Falls Dam Refurbishment Project, including environmental considerations during construction. NSP anticipates no significant environmental impacts such as scour or silt, and procedures for reporting any observed plumes during inspections.
5.4 Water Quality NS Power conducts water quality surveys as part of the hydro relicensing program, the process by which the water approvals for storage/withdrawal are renewed for each hydro system. Relicensing studies for the Sheet Harbou...
AI summary NS Power conducts water quality surveys as part of hydro relicensing, with the Sheet Harbour Hydro System's 2017 studies showing acidic conditions and eutrophic classification. A drawdown of the headpond may affect water quality, though inflows from the Grant River are expected to maintain oxygenation. NS Power plans monthly sampling from July to November to monitor parameters like temperature, dissolved oxygen, and turbidity.
CI 50518 CA IR-5 Attachment 21 Page 30 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description - Temperature - Dissolved oxygen - Nutrient content (la...
AI summary The document discusses the environmental impact assessment of the Ruth Falls Dam Refurbishment Project in Sheet Harbour, focusing on parameters such as temperature, dissolved oxygen, and nutrient content based on laboratory analysis.
CI 50518 CA IR-5 Attachment 21 Page 32 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Six wetlands have been selected for monitoring. Figure...
AI summary The document discusses the selection of six wetlands for monitoring as part of the Ruth Falls Dam Refurbishment Project. These wetlands, including WL3, WL5, WL6, WL15, WL17, and WL19, are highlighted in Figure 5 and described in Table 4.
CI 50518 CA IR-5 Attachment 21 Page 33 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description Wetlands selected for monitoring were chosen based on t...
AI summary The document discusses the selection and monitoring of wetlands for the Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project. Wetlands were selected based on their diversity, geographic spread, and biodiversity. Monitoring includes vegetation, hydrology, and soil assessments. An error in GIS mapping was identified and corrected in Wetlands 5 and 16.
5.6 Construction Material and Debris Measures will be taken to prevent any materials used in the various work activities from entering the watercourse. All such materials will be applied in a controlled manner and any excess material will...
AI summary The document outlines measures to prevent construction materials and debris from entering watercourses, ensuring controlled application and proper disposal on NS Power property or approved landfills in accordance with NSECC guidelines.
5.7 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refueling and lubrication shall be in designated are...
AI summary Equipment and machinery used near water must be mechanically sound, with refueling and lubrication restricted to designated areas away from water bodies. Petroleum storage must be at least 100 m from water, and oil spill contingency plans must be followed with spill kits on-site.
CI 50518 CA IR-5 Attachment 21 Page 35 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including its environmental description. It includes a redacted image and is part of a larger regulatory proceeding.
CI 50518 CA IR-5 Attachment 21 Page 36 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including an environmental description. A redacted image is included, likely showing details of the project or its environmental impact.
CI 50518 CA IR-5 Attachment 21 Page 37 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System, including an environmental description and a redacted image. It is part of a larger regulatory proceeding.
CI 50518 CA IR-5 Attachment 21 Page 38 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description
AI summary The document discusses the Ruth Falls Dam Refurbishment Project in the Sheet Harbour Hydro System, including environmental considerations and visual representations of the project.
CI 50518 CA IR-5 Attachment 21 Page 41 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX B – SITE PHOTOS
AI summary This document provides an overview of the Ruth Falls Dam Refurbishment Project in Sheet Harbour, including site photos in Appendix B. The content is redacted due to the inclusion of confidential information.
CI 50518 CA IR-5 Attachment 21 Page 45 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX C – PROPOSED WATER MANAGEMENT STRUCTURES CI 50...
AI summary This document outlines the Ruth Falls Dam Refurbishment Project and includes Appendix C, which describes proposed water management structures. It contains visual elements such as images and figures related to the project and its environmental aspects.
CI 50518 CA IR-5 Attachment 21 Page 69 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX E – Wetland Monitoring Plan
AI summary This document discusses the Wetland Monitoring Plan as part of the Ruth Falls Dam Refurbishment Project in Sheet Harbour Hydro System. It includes an appendix outlining strategies for monitoring wetland environments during and after the refurbishment process.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir (the Reservoir) within the Sheet Harbour Hydroelectric System to accommodate refurbishments (the Project). Strum Consultin...
AI summary Nova Scotia Power Inc. (NSPI) plans to temporarily lower the headpond at the Ruth Falls Reservoir for refurbishments. Strum Consulting was hired to develop a monitoring plan to assess the impact of this action on wetlands and fish habitat.
CI 50518 CA IR-5 Attachment 21 Page 72 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960...
AI summary This document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project, including pre-construction and post-construction monitoring periods. The plan aims to evaluate changes in wetland characteristics and function due to water level changes during construction and refurbishment.
Methodology Wetland monitoring will include detailed vegetative, hydrological, and soil monitoring within the six selected wetlands. Each wetland to be monitored was delineated prior to the commencement of monitoring activities to ensure t...
AI summary The methodology for wetland monitoring includes detailed vegetative, hydrological, and soil assessments. Vegetative monitoring involves quadrat-based assessments along transects, while monitoring wells and vegetation plots are strategically placed for consistency. Soil test pits and photographs are used to document and track changes over time.
CI 50518 CA IR-5 Attachment 21 Page 73 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960...
AI summary This document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project, led by Nova Scotia Power Inc. It emphasizes the timing of monitoring events to align with previous assessments and account for seasonal and environmental changes, ensuring accurate data collection and comparison over time.
REFERENCES Environmental Services Nova Scotia Power. 2018. Sheet Harbour Hydro System Relicensing Report . Jacques Whitford. 2007. Report – Vegetation Surveys at the Sheet Harbour Hydroelectric System . Project No. 1026751. NSLC Adopt a St...
AI summary The document references several environmental and hydroelectric reports related to the Sheet Harbour Hydro System, including relicensing, vegetation surveys, and fish habitat assessments.
2 STR= Stressors. 3 # Indicators Condition Choices Data Definitions/Explanations 4 OF1 Province Mark the province in which the AA is located by changing the 0 in the column next to it to a "1". Mark only one. This determines to which provi...
AI summary The document outlines a set of indicators used to evaluate stressors related to wetland areas. It includes details on how to mark the province, measure ponded areas within 1 km, and assess the size of the largest nearby vegetated tract or corridor.
CI 50518 CA IR-5 Attachment 21 Page 114 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 71 None of the above (the closest patches or corridors that large are >1 km away). 1 OF14 72 Distance to Large Ponded Water The distance f...
AI summary The text provides a table related to environmental assessments, including distance measurements from a site to large ponded water and tidal water bodies. It includes instructions for determining these distances using Google Earth and references specific files and tools for accuracy.
CI 50518 CA IR-5 Attachment 21 Page 331 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) must be immediately below the dam. The supplemental flow events are intended to complement significant high flow events (i.e., ≥ 24 mm of rain in 24...
AI summary The document discusses supplemental flow events designed to assist Atlantic Salmon migration upstream past a dam by providing adequate flow depth. It outlines fish species evaluated for their swimming abilities and migration behaviors, including Gaspereau, Brook Trout, Atlantic Salmon, and American Eels.
CI 50518 CA IR-5 Attachment 21 Page 332 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Selected Species Migration Times/Needs Past the Dam Migration Requirements Assessed Typical Size Range (cm) Assessed Size (cm) - water depth - behav...
AI summary The table outlines migration times, needs, and requirements for selected species, including Atlantic Salmon and American Eel, with details on river migration, velocity, temperature, water depth, behavior, swimming ability, and endurance. The assessed size for Atlantic Salmon is significantly larger than its typical size range.
CI 50518 CA IR-5 Attachment 21 Page 391 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX H – Louvre Assessment
AI summary This document discusses the Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project, including an appendix on the Louvre Assessment. The content is redacted due to the inclusion of confidential information.
CI 50518 CA IR-5 Attachment 21 Page 396 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Louvers can be very effective at guiding all fish including eels to a bypass if properly designed (Beck 2020) and modeling conducted at the Alden Re...
AI summary The document discusses the effectiveness of louvers in guiding fish, particularly eels, to bypass structures at Ruth Falls. It references studies by Beck (2020), Allen (2005), and Amaral (2003), highlighting the importance of guiding angles and the addition of a bottom barrier (overlay) to improve eel fish guidance efficiency (FGE).
CI 50518 CA IR-5 Attachment 21 Page 399 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) the Alden modeling (Allen et al 2005) that indicates the velocities are good for guiding the eels to the bypass both at the bottom and along the lou...
AI summary The document discusses modifications needed to improve eel passage efficiency at a dam, including checking for gaps in louvers and making design changes to direct eels to the surface outlet. Observations indicate that louvers are effective, but further inspection and adjustments are required.
6. Conclusions - 1) The installation of a ramp and bottom walls along the louver will greatly improve entrance conditions for eel and other benthic species traveling along the bottom. This option would provide passage for yellow stage eels...
AI summary The document discusses the installation of a ramp and bottom walls along a louver to improve fish passage, particularly for eels and other benthic species. It highlights the importance of designing the bypass entrance to prevent upstream fish movement and the trade-offs between flow velocity and fish passage effectiveness.
CI 50518 CA IR-5 Attachment 21 Page 404 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - 3) The bypass pipe outfall drop to the river and plunge pool as currently operating meets the drop and depth requirements to ensure it is safe for...
AI summary The document discusses the current and proposed modifications to fish passage systems at a dam site, focusing on eel passage and the effectiveness of the louvers and bypass channel. It highlights the need for monitoring studies and adjustments to ensure safe passage for all species, including eels, following construction modifications.
CI 50518 CA IR-5 Attachment 21 Page 406 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Piper, Adam T. 2015, Jon C. Svendsen, Rosalind M. Wright, Paul S. Kemp, Movement patterns of seaward migrating European eel (Anguilla anguilla) at a...
AI summary The text includes several academic references related to the movement patterns of European eels and fish behavior in relation to riverine barriers and spillways. These studies are likely relevant to environmental impact assessments or fish protection measures.
CI 50518 CA IR-5 Attachment 21 Page 407 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Sheet Harbour Hydro System Ruth Falls Dam Refurbishment Project and Environmental Description APPENDIX I – Upstream Eel Passage
AI summary This document discusses the Upstream Eel Passage as part of the Ruth Falls Dam Refurbishment Project in the Sheet Harbour Hydro System. It includes an image and is part of a larger environmental description related to the project.
3. Modern Eel Passes Generally, technical upstream fishways, such as fish ladders and fish lifts, are ineffective at passing juvenile eels. Therefore, specialized eel pass structures are required to provide a path for them over the dam (Vo...
AI summary Modern eel passes are specialized structures designed to help juvenile eels navigate dams. They consist of linear channels with climbing substrate and pumped water flow, and are often enclosed to protect eels from predators. The entrance is designed to accommodate varying water levels over extended periods.
Overview The Sheet Harbour Hydro system, including generation at Malay Falls and Ruth Falls has been providing clean, renewable electricity to Nova Scotians for nearly one hundred years. The system requires maintenance and upgrades to ensu...
AI summary Nova Scotia Power plans to refurbish the Ruth Falls Main Dam, including replacing stoplog bays with rubber inflatable dams and sluice gates. The project requires regulatory approvals and involves lowering the headpond temporarily. A habitat offsetting project with the Mi'kmaw Conservation Group and NS Salmon Association is also part of the effort to support Atlantic Salmon recovery.
CI 50518 CA IR-5 Attachment 21 Page 447 of 465 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Taxonomic A Antrostomus vociferus Eastern Whip-Poor-Will Special Concern Threatened Threatened S1?B 11 55.9 ± 7.0 NS A Passerculus sandwichensis pri...
AI summary This table lists various species of concern in Nova Scotia, including their conservation status, population estimates, and distribution. The entries include birds, fish, and reptiles, with some species categorized as Special Concern, Threatened, or Endangered.
Data Report 7716: Ruth Falls Watershed, NS Page 8 of 22 Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov A Hirundo rustica Barn Swallow Special Concern Threatened Endangered S3B 1048...
AI summary The document presents a table listing various species in the Ruth Falls Watershed, including their scientific names, conservation status, and other relevant data. It includes information on their legal protection status, rarity rankings, and distances from the watershed.
Data Report 7716: Ruth Falls Watershed, NS Page 9 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov A Falco sparverius American Kestrel S3B,S4S5M 318 5.9 ± 7.0 NS A Ga...
AI summary This table presents data on various bird species in the Ruth Falls Watershed, Nova Scotia, including their scientific names, conservation status, and population details. The information includes taxonomic groups, common and scientific names, COSEWIC and SARA status, provincial legal protection, rarity rank, number of records, and distances.
Data Report 7716: Ruth Falls Watershed, NS Page 10 of 22 Group A Scientific Name Passerella iliaca Common Name Fox Sparrow COSEWIC SARA Prov Legal Prot Prov Rarity Rank S3S4B,S5M # recs 115 Distance (km) 10.5 ± 0.0 Prov NS A Mergus serrato...
AI summary The document presents data on various species in the Ruth Falls Watershed, including their scientific and common names, conservation status, number of records, and distances. It includes information on birds, bees, and other wildlife, highlighting their rarity and conservation status within Nova Scotia.
Data Report 7716: Ruth Falls Watershed, NS Page 11 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov I Icaricia saepiolus Greenish Blue SH 2 70.1 ± 2.0 NS I Polygonia...
AI summary The document lists various species of lichens and butterflies in the Ruth Falls Watershed, Nova Scotia, along with their conservation status, rarity rankings, and distances from the watershed. Several species are listed as endangered, threatened, or of special concern under provincial and federal legislation.
Data Report 7716: Ruth Falls Watershed, NS Page 12 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov N Parmotrema reticulatum Netted Ruffle Lichen S1S2 1 88.5 ± 0.0 NS...
AI summary The document presents a table listing various species of lichens and mosses found in the Ruth Falls Watershed, NS, along with their conservation status, rarity rankings, and distances from the area. This data is part of a broader ecological assessment.
Data Report 7716: Ruth Falls Watershed, NS Page 13 of 22 N N Fuscopannaria ahlneri # recs Prov N Myurella julacea Small Mouse-tail Moss S3S4 1 95.9 ± 0.0 NS N Splachnum ampullaceum Cruet Dung Moss S3S4 2 12.6 ± 0.0 NS N N Tomentypnum niten...
AI summary This page from Data Report 7716 lists various species of mosses and lichens found in the Ruth Falls Watershed, Nova Scotia, along with their conservation status, number of records, and percentages. The data includes species such as Small Mouse-tail Moss, Cruet Dung Moss, and several types of lichens, all categorized under S3S4 conservation status.
Page 14 of 22 Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov г Juncus vaseyi 31 1 09.0 ± 0.0 P Malaxis monophyllos var. brachypoda North American White Adder's-mouth S1 1 $99.6 \pm...
AI summary The table lists various plant species with their scientific and common names, along with conservation status, rarity rankings, and other details. It includes information on species like North American White Adder's-mouth, Spreading Wild Rye, and Pennsylvania Sedge, with conservation statuses ranging from S1 to S1S2 and distances measured in kilometers.
Page 15 of 22 Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov Р Primula mistassinica Mistassini Primrose S2S3 17 49.3 ± 1.0 NS Р Anemone quinquefolia Wood Anemone S2S3 21 $46.0 \pm...
AI summary The table lists various plant species with their scientific names, common names, conservation status, rarity rankings, and distances in Nova Scotia. It includes data related to their conservation status under COSEWIC and provincial legal protections.
Data Report 7716: Ruth Falls Watershed, NS Page 19 of 22 # recs CITATION 46 LaPaix, R.W.; Crowell, M.J.; MacDonald, M.; Neily, T.D.; Quinn, G. 2017. Stantec Nova Scotia rare plant records, 2012-2016. Stantec Consulting. 46 Zinck, M. & Rola...
AI summary The document lists various citations and records related to biodiversity and species observations in Nova Scotia, including rare plant and butterfly records, fieldwork data, and conservation efforts by multiple organizations and researchers.
Data Report 7716: Ruth Falls Watershed, NS Page 20 of 22 # recs CITATION 23 Belland, R.J. Maritimes moss records from various herbarium databases. 2014. 23 Ferguson, D.C. 1954. The Lepidoptera of Nova Scotia. Part I, macrolepidoptera. Proc...
AI summary The document presents a list of citations related to biodiversity data in the Ruth Falls Watershed, Nova Scotia, including records on moss, Lepidoptera, rare species, lichen, and freshwater mussels, compiled by various researchers and institutions.
Data Report 7716: Ruth Falls Watershed, NS Page 21 of 22 7 O'Neil, S. 1998. Atlantic Salmon: Northumberland Strait Nova Scotia part of SFA 18. Dept of Fisheries & Oceans, Atlantic Region, Science. Stock Status Report D3-08. 9 recs. 7 Robin...
AI summary The document lists various biological surveys and records related to the Ruth Falls Watershed in Nova Scotia, including studies on Atlantic Salmon, Roseate Terns, lichens, rare plants, and other ecological data collected over several years by different researchers and organizations.
Data Report 7716: Ruth Falls Watershed, NS Page 22 of 22 # recs CITATION 1 MacKinnon, D.; Wright, P.; Smith, D. 2014. 2014 Common Tern email report, Eastern Passage, NS. NS Department of Environment. 1 McAlpine, D.F. 1998. NBM Science Coll...
AI summary The document presents a list of citations related to biodiversity and ecological data in the Ruth Falls Watershed, Nova Scotia. It includes reports and observations from various researchers and institutions, such as the Nova Scotia Nature Trust, the Mersey Tobeatic Research Institute, and the New Brunswick Museum.
CI 50518 CA IR-5 Attachment 22 Page 3 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Phone: (902) 424-7773 Fax: (902) 424-0597 - c. Minister means the Minister of Environment and Climate Change and includes any person delegated the auth...
AI summary The text defines key terms related to environmental regulation, including 'Minister,' 'Site,' and 'Surface Watercourse,' with specific reference to the Environment Act and the Minister of Environment and Climate Change.
CI 50518 CA IR-5 Attachment 22 Page 4 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - d. If there is a discrepancy between the reference documents and the terms and conditions of this Approval, the terms and conditions of this Approval...
AI summary This document outlines the terms and conditions of an approval, emphasizing compliance, notification requirements, and responsibilities of the Approval Holder. It includes obligations for environmental monitoring, laboratory analysis, construction oversight, and certification by a qualified professional engineer.
CI 50518 CA IR-5 Attachment 22 Page 6 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - (a) Maximum increase of 25 mg/l from background levels for any short term exposure (24 hour or less); - (b) Maximum average increase of 5 mg/l from b...
AI summary The document outlines environmental compliance requirements for an approval holder, including water quality limits, erosion and sediment control measures, and monitoring obligations. It specifies permissible increases in contaminants, the need for an erosion and sediment control plan, and procedures for handling sulphide-bearing materials and petroleum hydrocarbons.
CI 50518 CA IR-5 Attachment 22 Page 7 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - deficiencies shall be kept for the duration of the approval and made available to the Department upon request. - j. Work at the site shall only take...
AI summary The text outlines environmental protection measures required during construction activities, including erosion and sediment control, limitations on disturbed areas, and restrictions on activities near watercourses to prevent sediment release and environmental harm.
CI 50518 CA IR-5 Attachment 22 Page 8 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - placement within the watercourse to mitigate against the release of substance into a surface watercourse or wetland. - f. Any equipment used for work...
AI summary The text outlines environmental protection measures for work conducted within watercourses and wetlands, including equipment cleanliness, spill-kit requirements, and debris removal protocols to prevent contamination and invasive species transfer.
7. Site Specific - a. This Approval authorizes the refurbishment of the Dam on the Ruth Falls Reservoir at or near Malay Falls, Halifax County, Nova Scotia. NSPI shall ensure the work is carried out as described in the NSPI report entitled...
AI summary The document outlines the approval for the refurbishment of the Ruth Falls Dam, including environmental and project requirements such as erosion control, sediment management, and watercourse protection measures to minimize environmental impact during construction.
CI 50518 CA IR-5 Attachment 22 Page 9 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - g. Road drainage must not be discharged over a cut or fill unless appropriate vertically staged Erosion and Sediment Control measures are in place on...
AI summary The text outlines environmental protection measures related to water quality and erosion control during construction activities near a dam. It specifies pH monitoring requirements, turbidity limits, and the use of erosion and sediment control measures to minimize environmental impact.
CI 50518 CA IR-5 Attachment 22 Page 10 of 11 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - q. A contingency plan shall be in place for significant rainfall events (i.e., greater than or equal to a 1 in 2-year return period storm event). -...
AI summary The text outlines requirements for contingency planning during significant rainfall events and post-excavation site restoration, including soil stabilization and re-vegetation to prevent erosion.
NON-CONFIDENTIAL 1 Request IR-7: 2 3 Reference: "As a result of the additional work required to address environmental permitting 4 requirements, the construction timeline was extended leading to increased project costs of 5 approximately $...
AI summary The document discusses a request regarding the extended construction timeline and increased costs for a project, attributing the delay to environmental permitting requirements. NS Power asserts that the delay was directly caused by the environmental regulatory process and that obtaining permits more timely would have kept the project on budget.
- 3 Reference: NS Power states that regular labour costs will increase by $444,441, with term - 4 labour increasing by $94,851, plus associated overtime, all due to additional "project - 5 management support & environmental services labour...
AI summary NS Power has reported an increase in internal labour costs of $444,441, attributed to expanded project management support and environmental services labour due to an extended project timeline and scope. The costs are related to securing environmental permits for construction.
REDACTED Environmental Permitting Application fees Environmental maintenance flow assessment $1 Wetland delineation and functional assessment -$1 RFP support by the external Engineering Consultant -$6 KMKNO Capacity payments 1 TOTAL 0F $1,...
AI summary The text includes a table showing environmental permitting application fees and a line item for KMKNO Capacity payments totaling $1,631. Other items include environmental assessments and a payment to an external engineering consultant.
N-6NSPI (NSUARB) RIR-1 to 13 - Redacted
353 passages
CI 50518 - HYD - Ruth Falls Main Dam Refurbishment ATO (NSUARB M11927) NSPI Responses to NSUARB Information Requests 1 Request IR-1: 4 Project Detailed Cost Estimate" and in the project specifications and design. 5 6 (a) Has NS Power made...
AI summary The document outlines responses from NS Power to information requests regarding the Ruth Falls Main Dam Refurbishment ATO. It addresses whether changes were made to DFO requirements, confirms compliance with CDA Guidelines 2007 (Revised 2013), and references the 2019 ACE Plan proceeding (Matter M08984).
OPTION 5: NEW DAM CONSTRUCTED IMMEDIATELY DOWNSTREAM OF EXISTING DAM Option 5 would utilize the existing dam spillway structure as a cofferdam to control water during construction of a new dam immediately downstream. The new dam would requ...
AI summary Option 5 proposes constructing a new dam immediately downstream of the existing dam, utilizing the existing spillway as a cofferdam. This option involves relocating part of the existing fishway and may lead to increased construction costs and environmental concerns. Two spillway designs—5A and 5B—are analyzed for the new dam.
REDACTED Description Increase in costs (in Thousands) ADDITIONAL SCOPE: NEW PERMITTING REQUIREMENTS Fish Passage upgrades $1,630 Engineering support for environmental permit $15 application Barn Swallow nest removal $11 Pre-tree clearing n...
AI summary The text outlines various cost increases associated with a project, including fish passage upgrades, archaeological engagement, and extended construction timelines. The table details specific line items with associated costs, such as engineering support, environmental permits, and construction-related expenses.
ENVIRONMENTAL POLICY As a responsible company we will ensure that the proper safeguards are taken to protect our environment. All individuals will have responsibility and we will take the necessary action to protect the environment. Elliot...
AI summary The Elliot Group of Companies outlines its commitment to environmental protection, including recycling practices, employee training, waste management, and adherence to provincial legislation. Environmental emergencies are addressed with spill kits on site, and incidents are reported to ensure compliance.
The Elliot Group Environmental Site Inspection Form Loca tion ————— Project Insp ector — Foreman — — Date Silt fence or silt berm placed in a recommended condition & location. If necessary, extra silt fence and/or filter cloth on site. Oil...
AI summary This document outlines an environmental site inspection form used by The Elliot Group to ensure compliance with environmental regulations during construction. It includes various checks for erosion control, waste management, safety protocols, and adherence to legal requirements.
D.COMPLIANCE Elliot Excavators Limited shall comply with all applicable environmental legislation, regulations, standards, work practices and provisions including but not limited to: - Environmental Act of Nova Scotia - Nova Scotia Power I...
AI summary Elliot Excavators Limited is required to comply with environmental legislation and regulations, including the disposal of treated wood at approved facilities. A certificate of disposal will be provided to NSPI. The text also references a Redacted CI and an RFP related to the Ruth Falls Dam Refurbishment.
gc.ca/pnw-ppe/reviews-revues/applicants-guide-candidats-eng.html#131) to cover the cost of offsetting plan, if you are not exempted from providing one as set out in subsection 2(2) of the Regulations. Should you choose to relocate or redes...
AI summary The letter outlines requirements for offsetting plans under the Fisheries Act, noting that relocating or redesigning a proposal may avoid the need for authorization. Unauthorized activities could lead to enforcement actions. Contact details for inquiries are provided, along with a reference to a file number.
Fisheries and Oceans Canada Pêches et Océans Canada Canada Project engineering Yes See Appendix C of the Supporting Information specifications, scale drawings 103 Document. and dimensional drawings Document. (for physical works) [schedule...
AI summary This document outlines various sections and requirements related to a project, including engineering specifications, location information, consultations, effects on fish and habitat, mitigation measures, monitoring, contingency plans, and residual impacts. It also notes that habitat credits will not be used for the project.
CI 50518 NSUARB IR-12 Attachment 2 Page 7 of 50 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information place to ensure continued...
AI summary The document outlines the proposed refurbishment of the Ruth Falls Dam, including fish conveyance system installation, reservoir lowering, and spillway modifications. It notes that the project will require variances from existing operating approvals, particularly regarding maintenance flows and elevation requirements, while ensuring environmental compliance.
4.0 PHASES AND SCHEDULE The Project is expected to take six to seven months starting in May 2021 the Project and Environmental Description document submitted to NSE as part of the Watercourse Alteration Approval Application and finishing i...
AI summary The Project is expected to take six to seven months starting in May 2021, involving the lowering and recharging of water in the headpond to avoid exposing fish eggs during spawning. The detailed construction schedule will be developed by the contractor after the contract is awarded.
CI 50518 NSUARB IR-12 Attachment 2 Page 15 of 50 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information There are no formal fish...
AI summary The Ruth Falls Dam Refurbishment Application discusses the impact on fish habitat in Sloane Reservoir and the East River of Sheet Harbour. It notes there are no formal fisheries management objectives for the area, and the temporary loss of habitat is not expected to significantly affect local fish populations.
10.0 MEASURES AND STANDARDS TO AVOID OR MITIGATE SERIOUS HARM TO FISH NSP recognizes DFO's mitigation hierarchy, which emphasizes that efforts must be made to prevent impact first and, where avoidance is not possible, efforts must be made...
AI summary NSP acknowledges DFO's mitigation hierarchy, focusing on preventing and minimizing impacts to fish and their habitats. Table 5 outlines potential effects and mitigation measures for the new dam project, ensuring no permanent impacts to the East River of Sheet Harbour or Ruth Falls Reservoir beyond the new dam's footprint.
Table 5: Summary of potential impacts associated with the Project and mitigation measures to prevent or minimize impacts. Potential Effect Measure to Mitigate Serious Harm Temporary loss of fish habitat (approximately 600 m2 ‐ 1350 m2 ) du...
AI summary The project may temporarily reduce fish habitat by lowering the reservoir, potentially exposing fish eggs. NSPI plans to lower the reservoir in mid-May, prior to spawning, and ensure a minimum flow of 35 cfs to support fish spawning. Mitigation includes offsetting habitat loss and using upstream fish conveyance systems.
Potential Effect Measure to Mitigate Serious Harm Potential downstream scour during drawdown of reservoir. The reservoir will be lowered primarily through generation. Water will flow through the power canal to the generating station until...
AI summary The document discusses measures to mitigate potential downstream scour during the drawdown of a reservoir. The reservoir will be lowered through generation, with controlled flow through the power canal and sluice bay. Stop logs will be removed individually to manage the drawdown, and environmental monitoring will be conducted to address potential issues.
Potential Effect Measure to Mitigate Serious Harm continuing downstream. Inability to monitor for salmon while trap is out of service. NSPI have considered options for continuing to operate the salmon trap during construction. Given associ...
AI summary The document outlines mitigation measures to address potential environmental impacts of construction activities on salmon migration and fish habitat. NSPI will not operate the salmon trap in 2021 due to low salmon numbers and will implement erosion and sedimentation controls to protect fish and habitat. Hazardous materials from equipment will be managed to prevent contamination.
Short‐term monitoring will be completed during construction to ensure mitigation measures proposed for potential impacts identified in Table 5 are effective. Drawdown of the reservoir will be monitored by NSPI Environmental Services person...
AI summary Short-term environmental monitoring during construction will ensure mitigation measures are effective. NSPI Environmental Services will monitor reservoir drawdown and fish passage systems to ensure safe fish movement and promptly report any issues.
CI 50518 NSUARB IR-12 Attachment 2 Page 18 of 50 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information site representative. Env...
AI summary The Ruth Falls Dam Refurbishment project includes environmental protection measures such as compliance audits, erosion and sedimentation control, and water quality sampling. A Project-specific environmental protection plan will be developed, and contractors will be required to follow environmental standards and provide training.
12.0 CONTINGENCY MEASURES Both upstream and downstream fish passage will be closely monitored throughout construction. Should issues arise, the situation will be immediately assessed and decisions made regarding alternate methods by the Co...
AI summary The document outlines contingency measures for monitoring fish passage during construction. If issues arise, the Contractor, Project Manager, Engineers, Environmental Services, and Hydro Operations will assess and address them. Mitigation measures from Section 10 will be followed, and work will halt if these measures are ineffective. Environmental protocols and monitoring are emphasized to prevent significant issues.
13.0 DEATH OF FISH AFTER IMPLEMENTATION OF MEASURES AND STANDARDS DFO have concluded that the following water management strategies are likely to result in the death of fish by means other than fishing, and/or the harmful alteration, disru...
AI summary The Department of Fisheries and Oceans (DFO) has identified potential impacts on fish and their habitats due to water management strategies, including reservoir drawdowns and construction activities. Mitigation measures and monitoring are planned to prevent fish deaths and minimize harm to fish habitats.
Table 6: Residual Harm from Potential Impacts Associated with the Ruth Falls Main Dam Refurbishment Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Temporary loss of fish habitat (approximately 600...
AI summary The text discusses the potential residual harm to fish from the temporary loss of fish habitat due to lowering the reservoir during the Ruth Falls Main Dam refurbishment. Mitigation measures include timing the drawdown to avoid spawning seasons and maintaining sufficient water flow for fish spawning. No residual harm is anticipated.
Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Inability to provide safe fish passage upstream and downstream during construction. Upstream fish passage will be provided using a fish pump conveyan...
AI summary The document outlines measures to mitigate serious harm to fish during construction at the Ruth Falls site, including the use of a fish pump conveyance system to ensure safe fish passage. The system will be monitored and maintained by qualified personnel, with contingency plans in place if issues arise.
Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish This can be accomplished with steel beams and building abutments out of swamp maps as an example. This will be determined by the contractor. Downstre...
AI summary The text discusses measures to mitigate serious harm to fish during a project, including the use of steel beams and building abutments based on swamp maps, and the monitoring of downstream fish passage by the contractor throughout the project duration.
CI 50518 NSUARB IR-12 Attachment 2 Page 29 of 50 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Photo 2: View of Ruth Falls Dam, facing west Photo 3: Ruth Falls fishladder and bypass pipe
AI summary The document includes photos of Ruth Falls Dam and its fishladder and bypass pipe, likely related to infrastructure and environmental considerations in a regulatory proceeding.
CI 50518 NSUARB IR-12 Attachment 2 Page 44 of 50 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information conveyance system is ins...
AI summary The Ruth Falls Dam Refurbishment Application outlines plans for dewatering the reservoir and implementing fish passage measures during construction. Key activities include lowering water levels, maintaining a 35 cfs flow, and ensuring fish migration. Qualified personnel will monitor water quality and fish rescue during the drawdown process.
4.2 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt‐laden water in the w...
AI summary Erosion and sedimentation control measures, including hay and silt fencing, will be implemented to prevent sediment-laden water from entering the headpond during dewatering. Water will be recovered and pumped to areas with vegetation for filtration, and NSPI will monitor water quality.
4.3 Construction Material and Debris Measures will be taken to prevent any materials used in the various work activities from entering the watercourse. All such materials will be applied in a controlled manner and any excess material will...
AI summary The document outlines measures to prevent construction materials and debris from entering watercourses, ensuring controlled application and proper disposal on NSPI property or approved landfills in accordance with NSE guidelines.
4.4 Equipment and Machinery All equipment and machinery required to be operated on or near a body of water will be mechanically sound with no leaking fuel tanks or hydraulic connections. Refuelling and lubrication shall be in designated ar...
AI summary The text outlines requirements for equipment and machinery operations near water bodies, including mechanical soundness, fuel and lubrication storage, spill prevention, and contingency planning to prevent environmental harm.
CI 50518 NSUARB IR-12 Attachment 4 Page 8 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities discharge through the dam that...
AI summary NS Power is planning a drawdown of the Ruth Falls Headpond to reach an elevation of 98.0 ft, with discharge through the dam equivalent to one or both generating units. They are not anticipating significant erosion, sedimentation, or fish entrainment risks during this process and will monitor for fish entrapment.
CI 50518 NSUARB IR-12 Attachment 4 Page 9 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities personnel. The system will be m...
AI summary The document outlines NS Power's plan for water management during the Ruth Falls Dam refurbishment, including continuous downstream discharge to maintain fish passage and comply with regulatory requirements. The proposed system has been used successfully by the Halifax Regional Municipality, and NS Power intends to seek a variance from ECC for modifications to flow releases.
EROSION AND SEDIMENTATION CONTROL NS Power is anticipating minimal impacts to the surrounding environment with respect to erosion, scour and associated sedimentation of watercourses. The proposed scope of work for the Project involves mini...
AI summary NS Power anticipates minimal environmental impact from erosion and sedimentation due to the limited excavation involved in refurbishing the existing dam. Silt fencing will be used during construction to control sedimentation, particularly around the spillway channel.
CI 50518 NSUARB IR-12 Attachment 4 Page 14 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities small and as such, soil materi...
AI summary The document outlines monitoring activities for the Ruth Falls Dam Refurbishment project, including the use of pumps, sediment traps, and silt fencing to manage water filtration and prevent sediment from entering watercourses. Potential filtration areas are identified, and further field verification is planned for spring 2021.
CI 50518 NSUARB IR-12 Attachment 4 Page 15 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities All cofferdam material will be...
AI summary NS Power outlines mitigation measures for sedimentation and erosion during the Ruth Falls Dam refurbishment. These include using clean rockfill cofferdams, silt curtains, and monitoring activities. They will also require the contractor to submit a site-specific erosion and sedimentation control plan and conduct regular inspections to ensure compliance and mitigate environmental impacts.
CI 50518 NSUARB IR-12 Attachment 4 Page 17 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities and the louvers present in the...
AI summary The document outlines fish rescue efforts during the Ruth Falls Dam refurbishment, emphasizing methods to minimize fish mortality during reservoir drawdown. NS Power estimates that approximately 10% of fish over 10 cm and 20% under 10 cm may not be successfully rescued, with adjustments made for unidentifiable stranding areas. Continuous inflows into the headpond are expected to reduce ongoing fish mortality risks.
CI 50518 NSUARB IR-12 Attachment 4 Page 18 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities The water quality surveys comp...
AI summary The document outlines water quality monitoring activities for the Ruth Falls Dam Refurbishment project, including sampling of parameters such as pH, dissolved oxygen, and nutrient content. NS Power plans to conduct monthly monitoring from July to November to assess the impact of drawdown on water quality and compare results to normal operating conditions.
CI 50518 NSUARB IR-12 Attachment 4 Page 19 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities total suspended solids to ensu...
AI summary The text discusses monitoring activities related to total suspended solids (TSS) to ensure compliance with standard approval conditions under the Fisheries Act Authorization for the Ruth Falls Dam Refurbishment. This includes establishing background samples during normal and high inflow periods and comparing them to weekly water sampling downstream of the dam.
EGG/LARVAE STRANDING NS Power proposes to use a worst‐case scenario approach to estimate the impact of the drawdown on gaspereau eggs and larvae. This estimate will rely on upstream migration counts at the Ruth Falls fishladder (to be cond...
AI summary NS Power proposes using a worst-case scenario approach to estimate the impact of drawdown on gaspereau eggs and larvae. The estimate will rely on upstream migration counts at the Ruth Falls fish ladder and assumptions about fish behavior, fecundity, and survival rates.
4.5.2 Monitoring Transects Monitoring transects will also be completed once per month to supplement the drone surveys. One (1) monitoring transect will be selected on Ruth Falls Headpond. The position of the transect will not be located ra...
AI summary Monthly monitoring transects will be conducted on Ruth Falls Headpond to assess ecological changes during a drawdown. Transects will focus on areas of high ecological value, with data collected from both drone surveys and on-site observations. The data will be used to evaluate potential impacts on habitat from the drawdown, and short-term changes are not assumed to be permanent.
CI 50518 NSUARB IR-12 Attachment 4 Page 22 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities NS Power will also complete a...
AI summary NS Power will conduct a literature review of scientific publications to supplement drone surveys and monitoring transects, aiming to assess changes in vegetation, soils, and habitat loss around the Ruth Falls Dam Refurbishment project.
CI 50518 NSUARB IR-12 Attachment 4 Page 26 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities Figure 4: NS Department of Lan...
AI summary NS Power is proposing a wetland monitoring program for the Ruth Falls Dam Refurbishment project, given the potential short-term impacts from a 9-month drawdown. They plan to use a previously approved monitoring plan from the Tusket Main Dam Refurbishment Project as a basis for this effort.
CI 50518 NSUARB IR-12 Attachment 4 Page 27 of 57 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Supporting Information #1 Monitoring Activities - An updated desktop assessmen...
AI summary The document outlines the wetland monitoring activities for the Ruth Falls Dam Refurbishment project, including baseline assessments, construction monitoring, and post-construction monitoring. It emphasizes the importance of data collection to identify changes in wetland habitat and fish habitat value.
4.5.4 Post‐Construction Monitoring As part of the wetland monitoring program, a post‐construction monitoring program will be implemented for 5 years starting in 2022 once construction is completed and reservoir elevations return to normal...
AI summary A post-construction monitoring program will be implemented by NS Power for 5 years starting in 2022 to assess long-term impacts on wetlands and fish habitat after reservoir elevations return to normal operation. The program will be based on data collected during construction monitoring and may involve extending drone surveys or adding aquatic habitat assessments.
4.6 REPORTING NS Power will provide a report on 2021 drawdown monitoring activities by June 30, 2022, detailing results of the fish rescue survey and mortality estimates, estimates for loss of egg/larval stage fish due to stranding, result...
AI summary NS Power is required to submit a detailed report by June 30, 2022, covering 2021 drawdown monitoring activities, including fish rescue surveys, mortality estimates, egg/larval fish loss, downstream entrainment results, habitat assessments, and water quality surveys mandated by the Environmental Compliance Committee (ECC).
Construction Monitoring NS Power requires that the main civil contractor (or general contractor) develop a site‐specific water management and erosion and sedimentation control plan that must align with NS Power's established water manageme...
AI summary NS Power requires contractors to develop site-specific environmental plans and conducts regular inspections to ensure compliance with environmental standards. A summary report confirming compliance will be provided to DFO by June 30, 2022.
Death of Fish/HADD after Avoidance and Mitigation Measures and Standards Table 8 provides a summary of potential impacts to fish and fish habitat including proposed mitigation and potential for death of fish and/or harmful alteration, disr...
AI summary Table 8 outlines potential impacts to fish and fish habitat, including mitigation measures and the potential for death of fish and harmful alteration, disruption, or destruction of fish habitat (HADD) due to water management activities during the Ruth Falls Main Dam refurbishment.
Table 8: Residual Harm from Potential Impacts Associated with the Ruth Falls Main Dam Refurbishment Potential Effect Spatial Extent of Potential Effect Probability of Potential Effect Magnitude of Potential Effect Measures to Mitigation De...
AI summary The table outlines the residual harm from potential impacts associated with the Ruth Falls Main Dam Refurbishment, focusing on temporary and permanent effects on fish habitat, fish mortality, and monitoring challenges. Most impacts are deemed low in magnitude, with mitigation measures and monitoring to confirm residual harm.
Reduced ability for salmon to migrate Localized: Ruth Falls High Low Refer to No residual upstream due to downstream Headpond Section 3 HADD supplemental flows not being released. anticipated Effects to fish and fish habitat due to Localiz...
AI summary The document discusses environmental impacts related to a project, including reduced salmon migration ability, sedimentation effects on fish habitat, and potential release of hazardous materials. These impacts are localized around Ruth Falls and the Sheet Harbour area. The section also references an offsetting plan in Section 8.0.
CI 50518 NSUARB IR-12 Attachment 5 Page 1 of 2 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Fisheries and Oceans Canada Pêches et Océans Canada Bedford Institute of Oceanography 1 Challenger Drive P.O. Box 1006, Station P500 Dartmouth, Nova...
AI summary Fisheries and Oceans Canada has informed Nova Scotia Power that their application for a Fisheries Act authorization for the Sheet Harbour Ruth Falls Headpond Dam refurbishment is incomplete or inadequate. The application involves significant changes to the dam and potential impacts on fish habitat.
CI 50518 CA IR-5 Attachment 1 Page 7 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information erosion or scour is minimized...
AI summary The document discusses the Ruth Falls Dam Refurbishment Application, including measures to minimize erosion, scour, and fish entrainment, with additional environmental protection details outlined in the Monitoring Plan (Appendix F).
9.0 DESCRIPTION OF EFFECTS ON FISH AND FISH HABITAT The following water management strategies related to the Project have the potential to result in the death of fish by means other than fishing, and/or the harmful alteration, disruption,...
AI summary The project may temporarily disrupt fish habitat due to drawdowns and construction activities, but the effects are expected to be minimal and temporary. Measures will be taken to mitigate impacts on fish migration and spawning, and preliminary data from similar projects suggests limited habitat changes.
Table 4: Summary of potential effects on fish and fish habitat due to refurbishment of the Ruth Falls Main Dam Potential Effect Spatial Extent of Potential Effect Probability of Potential Effect Magnitude of Potential Effect Temporary loss...
AI summary The table outlines potential effects on fish and fish habitat due to the refurbishment of the Ruth Falls Main Dam. Effects include temporary habitat loss, fish mortality, and changes to fish passage. Most effects are localized and have low probability and magnitude, except for one effect with high magnitude related to changes in fish passage.
11.0 MEASURES AND STANDARDS TO AVOID OR MITIGATE SERIOUS HARM TO FISH NS Power recognizes DFO's mitigation hierarchy, which emphasizes that efforts must be made to prevent impact first and, where avoidance is not possible, efforts must be...
AI summary NS Power acknowledges the Department of Fisheries and Oceans' mitigation hierarchy, emphasizing prevention and minimization of impacts on fish and fish habitat. Materials will be stored and handled according to WHMIS regulations, and mitigation measures are outlined in Table 5 to avoid permanent impacts to the East River and Ruth Falls Headpond.
Temporary loss of fish habitat (approximately 1.15 km2 ) due to lowering of the reservoir beyond the minimum operating level observed from April 1 – Nov. 30 annually. Lowering the headpond approximately 18' is required in order to complete...
AI summary The temporary loss of fish habitat due to lowering the Ruth Falls dam's headpond is a necessary step for refurbishment. NS Power acknowledges the impact and proposes mitigation measures, such as controlled drawdown and maintaining water flow for fish spawning.
Potential Effect Measure to Mitigate Serious Harm Fish mortality due to stranding when lowering headpond In order to conduct work in dry conditions, the headpond will be lowered approximately 18' below the minimum operating level of 109.25...
AI summary The document outlines a measure to mitigate fish mortality caused by lowering the headpond during construction. The headpond will be lowered by 18' below the minimum operating level, and qualified staff will monitor for stranded fish, capturing and relocating them if found. NS Power has proposed mechanisms to evaluate mortality and offsetting measures.
Potential Effect Measure to Mitigate Serious Harm Effects to fish and fish habitat due to sedimentation of the river from construction activities NS Power's best practices for erosion and sedimentation controls will be employed to prevent...
AI summary The text discusses measures to mitigate the potential environmental impact of sedimentation on fish and fish habitat due to construction activities. NS Power will employ best practices for erosion and sedimentation control, including site-specific plans, geotextiles, and sediment control devices, to minimize disruption and protect watercourses.
dam spillway. Post-construction, the majority of water control will be done using the vertical lift impacts to fish and fish habitat as a result of this: Potential Effect Measure to Mitigate Serious Harm
AI summary The text discusses the potential impacts of dam spillway operations on fish and fish habitat post-construction, and outlines measures to mitigate serious harm.
CI 50518 CA IR-5 Attachment 1 Page 19 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information - -Fish Rescue - -Tributary...
AI summary The document outlines environmental protection measures for the Ruth Falls Dam Refurbishment Project, including fish rescue, monitoring activities, and the development of a project-specific environmental protection plan (EPP) to address potential environmental risks.
13.0 CONTINGENCY MEASURES Both upstream and downstream fish passage will be closely monitored throughout construction. Should issues arise, the situation will be immediately assessed and decisions made regarding alternate methods by the Co...
AI summary The document outlines contingency measures for fish passage and water management during construction. These include monitoring, stopping work if mitigation fails, and implementing measures like sandbags to handle unexpected inflows. Details are provided in Appendix F.
Table 6: Residual Harm from Potential Impacts Associated with the Ruth Falls Dam Refurbishment Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish
AI summary The table outlines potential residual harm from the Ruth Falls Dam refurbishment, focusing on impacts to fish and measures to mitigate serious harm. It highlights environmental concerns related to the project.
Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Loss of ~60 m2 of fish habitat in the East River of Sheet Harbour The amount of new footprint has been optimized to meet stability requirements for t...
AI summary The text outlines potential environmental impacts of a dam project on fish habitat and mortality, including habitat loss and fish stranding during headpond lowering. Mitigation measures such as habitat offsetting, monitoring by NS Power Environmental Services, and gradual drawdown are discussed to minimize harm.
Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Potential downstream scour during drawdown of reservoir. NS Power will use the Ruth Falls generating units to initially lower the headpond elevation...
AI summary The document outlines measures by NS Power to mitigate potential downstream scour during reservoir drawdown at Ruth Falls. The drawdown will be controlled using generating units and a vertical lift gate, with discharge limited to 500 cfs. Bedrock and boulders downstream reduce erosion risks, and NS Power will report any scour to NS Environment and Climate Change and make repairs if needed.
Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Effects to fish and fish habitat due to sedimentation of the river from construction activities NS Power's best practices for erosion and sedimentati...
AI summary The document outlines NS Power's measures to mitigate sedimentation effects on fish and their habitat due to construction activities. These include erosion and sedimentation controls, site-specific plans, and monitoring of weather conditions and dewatering rates. No residual harm is anticipated.
passage will not be possible with the new vertical lift gates but also notes that surface passage is still present over top the newly installed rubber dams and free overflow section of the new dam structure. The newly installed rubber dams...
AI summary The passage discusses the installation of new vertical lift gates and rubber dams at a dam structure, noting that surface passage remains available. NS Power believes the new operation will not negatively impact fish migration through the Ruth Falls fish ladder and proposes post-construction monitoring for two years.
16.0 OFFSETTING CREDIT NS Power is proposing, in partnership with the Mi'kmaw Conservation Group (MCG) and the Nova Scotia Salmon Association (NSSA), a restoration project that is suitable for offsetting of serious harm for the Ruth Falls...
AI summary NS Power, in partnership with the Mi'kmaw Conservation Group and the Nova Scotia Salmon Association, is proposing a fish habitat restoration project to offset the environmental impact of dam refurbishments. The project involves habitat restoration on the West River and includes a letter of credit for $62,000, based on previous offsetting plans.
CI 50518 CA IR-5 Attachment 1 Page 32 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Photo 2: View of Ruth Falls Dam, facing west Photo 3: Ruth Falls fishladder and bypass pipe
AI summary The document includes redacted pages from a regulatory proceeding and contains images of Ruth Falls Dam and its fishladder and bypass pipe. The content is related to infrastructure and environmental considerations.
CI 50518 CA IR-5 Attachment 1 Page 63 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information the reservoir once drawn dow...
AI summary NS Power is proposing to refurbish the Ruth Falls Dam, which involves drawing down the reservoir, installing a temporary bridge, and managing water levels during construction. Measures include controlling downstream flow, using clean materials, and monitoring water quality and fish rescue operations.
4.2 Erosion and Sedimentation Control Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the w...
AI summary The document outlines erosion and sedimentation control measures during construction, including the use of materials like hay and silt fencing. Water quality will be monitored by NS Power, and past flood events have not caused erosion or scour. Communication between project and hydro operations personnel is emphasized to manage high inflows.
CI 50518 CA IR-5 Attachment 1 Page 64 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment Application for Authorization – 34.4(2)(b) and 35(2)(b) Fisheries Act Supporting Information All access road material wil...
AI summary The document outlines measures to minimize sedimentation during the Ruth Falls Dam refurbishment, including the use of clean rock material, rockfill cofferdams, pumps for silt removal, and siltation monitoring by NS Power during the removal process.
CI 50518 CA IR-5 Attachment 1 Page 70 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan - ix. Replacement of the west retaining wall, to the west of the f...
AI summary NS Power is proposing to lower the Ruth Falls Headpond as part of the refurbishment of the Ruth Falls Dam, citing it as the safest and most efficient method. The plan includes mitigation measures to address environmental and archaeological risks, as well as safety concerns for employees and contractors.
Table 1: Summary of potential effects on fish and/or fish habitat due to refurbishment of the Ruth Falls Dam Potential Effect Spatial Extent of Potential Effect Probability of Potential Effect Magnitude of Potential Effect Temporary loss o...
AI summary The table outlines potential environmental effects on fish and fish habitat due to the refurbishment of the Ruth Falls Dam. Effects include temporary and permanent habitat loss, fish mortality, and downstream scour, with localized spatial extents and low to medium probabilities and magnitudes.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
Inability to provide safe fish passage upstream and downstream during construction. Localized: Ruth Falls Headpond Low Low Inability to monitor for salmon while trap is out of service. Localized: Ruth Falls Headpond High Low Reduced abilit...
AI summary The document outlines potential environmental impacts related to fish passage and habitat due to construction activities at Ruth Falls Headpond and East River of Sheet Harbour, including the inability to monitor salmon, sedimentation, and changes in fish passage structures. It also mentions proposed avoidance and mitigation measures.
CI 50518 CA IR-5 Attachment 1 Page 75 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan existing louvre system that may effectively improve the efficacy o...
AI summary This document outlines NS Power's plan to assess and modify the existing louvre system at the Ruth Falls Dam to improve downstream passage for American eels. The modifications will be based on an engineering assessment and will be evaluated through a study comparing pre- and post-modification results, with findings submitted to the Department of Fisheries and Oceans.
3.4 UPSTREAM ESCAPEMENT NS Power will monitor upstream escapement at the Ruth Falls fish ladder using a camera installed in the fish ladder to inform the Harmful Alteration Disruption or Destruction (HADD) and death of fish and subsequent...
AI summary NS Power will monitor upstream escapement at the Ruth Falls fish ladder using a camera to assess fish movement and ensure compliance with environmental regulations. The camera will be operational by mid-May 2022, with daily checks to ensure its functionality and proper monitoring of fish passage.
CI 50518 CA IR-5 Attachment 1 Page 76 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Counts will be taken from video footage to inform upstream gaspera...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment, focusing on escapement counts using DFO methodology and continued salmon trap operations until the fish ladder is dewatered.
Table 3: Estimated Flow Velocities Table Time (day) Beginning Elevation (ft) Middle Sluice Opening (ft) Discharge (cfs) Velocity through gate(fps) Downstream Velocity (fps) 0 109.2 1 211 21 2.4 0.5 108.8 1 209 21 2.4 1 108.0 1 204 20 2.4 1...
AI summary Table 3 presents estimated flow velocities at different times, including elevation, sluice opening, discharge, and velocities through the gate and downstream. This data may be relevant to infrastructure planning and environmental compliance.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
CI 50518 CA IR-5 Attachment 1 Page 80 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan watercourse Alteration Standard (requiring a bridge to have a widt...
AI summary The document outlines NS Power's plan for managing water levels and infrastructure during the Ruth Falls Dam refurbishment, including bridge removal during high flow conditions and measures to mitigate sedimentation risks. Contingency plans are in place for significant flood events, and communication protocols are established with Hydro Operations.
3.7 EROSION AND SEDIMENTATION CONTROL NS Power is anticipating minimal impacts to the surrounding environment with respect to erosion, scour and associated sedimentation of watercourses. The proposed scope of work for the Project involves...
AI summary NS Power anticipates minimal environmental impact from erosion and sedimentation due to the project's focus on refurbishing an existing dam. Excavation will be limited, and silt fencing will be used to control sedimentation during construction of the retaining wall.
CI 50518 CA IR-5 Attachment 1 Page 81 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Pumps will be used to keep the retaining wall work area dry and si...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment, detailing methods to manage water filtration and sediment control during construction. Pumps will be used to manage water, and silt fencing will be installed to prevent sediment from entering watercourses. Potential filtration areas have been identified and will be field-verified.
CI 50518 CA IR-5 Attachment 1 Page 82 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan cofferdams have been used by NS Power on other hydro refurbishment...
AI summary NS Power outlines measures to mitigate sedimentation and environmental impacts during the Ruth Falls Dam refurbishment project. These include the use of silt curtains, pumps, washed rock, and monitoring during construction. Contractors will be required to submit site-specific erosion and sedimentation control plans, and NS Power will conduct regular inspections to ensure compliance with environmental standards.
4.1 BACKGROUND NS Power completes fish and fish habitat surveys as part of the Hydro Relicensing Program, which takes place on a 10-year cycle as part of the renewal of Hydro System Water Storage Approvals. The relicensing fish data collec...
AI summary NS Power conducts fish and fish habitat surveys every 10 years as part of the Hydro Relicensing Program. The data collected is qualitative, and NS Power has two datasets for the Sheet Harbour Hydro System from 10 years apart, allowing for some trend analysis and observations.
CI 50518 CA IR-5 Attachment 1 Page 84 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan seines. The team may need to travel on foot to certain areas that...
AI summary NS Power is preparing a fish rescue plan for the Ruth Falls Dam refurbishment, estimating fish mortality during a drawdown. They anticipate 10% of fish over 10 cm and 20% under 10 cm may not be rescued, with adjustments for unidentifiable stranding areas. The plan involves electrofishing, seining, and special attention to species of conservation concern.
4.2.1 Tributary Monitoring During the fish rescue, NS Power will conduct ground truthing to confirm any tributary locations on Ruth Falls Headpond using the results of a desktop exercise identifying tributaries depicted on 1:50,000 mapping...
AI summary NS Power will conduct ground truthing to identify tributaries at Ruth Falls Headpond, using both desktop mapping and field observations. Field personnel will walk portions of tributaries into the reservoir after a 2-day period.
CI 50518 CA IR-5 Attachment 1 Page 86 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Monthly monitoring will be conducted from July to November and wil...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment, specifying monthly monitoring activities from July to November, including parameters such as Secchi depth, temperature, dissolved oxygen, and nutrient content. NS Power will also install a temperature logger to monitor lake temperatures continuously.
4.4 EGG/LARVAE STRANDING NS Power will monitor upstream escapement of gaspereau at the fish ladder using NS Power's video recording system; NS Power is intending to install a new system at the fish ladder in mid-May 2022 in order to captur...
AI summary NS Power plans to monitor gaspereau upstream migration using a video recording system at the fish ladder, with a new system to be installed in mid-May 2022. The method has been used at other hydro locations and will provide data for fisheries management. Assumptions about migration timing, fecundity, and mortality rates are outlined for estimating egg/larvae mortality.
CI 50518 CA IR-5 Attachment 1 Page 87 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Based on these assumptions, the mortality estimate for eggs and la...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment under the Fisheries Act. It calculates mortality estimates for gaspereau eggs and larvae based on assumptions about fish count, sex ratio, survival rate, and fecundity. The plan also notes that upstream gaspereau escapement is expected to be low due to downstream challenges.
4.5.1 Overview The drawdown of the Ruth Falls Headpond will be conducted gradually to avoid creating excessive flows, which will reduce the risk of entrainment of fish and other species downstream of the dam. It should be noted that NS Pow...
AI summary NS Power plans to gradually drawdown the Ruth Falls Headpond to minimize environmental risks, particularly to fish species. A monitoring program will assess fish abundance, entrainment, and aquatic habitat changes during the drawdown. NS Power will use a third-party consultant for monitoring to ensure compliance and environmental protection.
4.5.2 Methods A similar study was carried out during the drawdown for the Tusket Main Dam Refurbishment Project. The study involved two parts; the first was to determine the presence and density of YoY gaspereau in the Vaughn reservoir usi...
AI summary The document discusses a study on fish entrainment and habitat during the drawdown of the Tusket Main Dam Refurbishment Project. Methods included sampling with various nets and shoreline monitoring. Similar methods will be used for the Ruth Falls Dam, with findings indicating no fish mortality and suitable habitat downstream.
4.5.3 Study Plan The duration of the drawdown is scheduled to take 4 days starting no earlier than July 10, this will provide sufficient time for juvenile fish to move through the system. The planned late start date of the drawdown will pr...
AI summary The study plan outlines a 4-day fish drawdown starting no earlier than July 10 to allow juvenile fish to move through the system safely. Monitoring will occur before, during, and after the drawdown, with an adaptive sampling approach based on fish collection rates. A field plan detailing gear types and sampling methods will be submitted to DFO by March 31, 2022.
CI 50518 CA IR-5 Attachment 1 Page 89 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan sampling equipment will be based on a DFO approved method and requ...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment under the Fisheries Act. It includes sampling methods approved by the DFO, flow rate measurements, and procedures for estimating fish entrainment and harm. If data is insufficient, DFO may use precautionary assumptions for offsetting requirements.
4.6.1 Drone Surveys NS Power will apply the following methodology to characterize the habitat in Ruth Falls Headpond during the drawdown. A baseline drone survey, completed no earlier than 2 weeks prior to the start of drawdown, will be co...
AI summary NS Power plans to use drone surveys and GIS to monitor habitat changes in Ruth Falls Headpond during and after a drawdown. Baseline surveys will be conducted before and after the drawdown, with ongoing monitoring to assess shoreline evolution. NS Power emphasizes that short-term changes may not indicate permanent habitat harm and seeks further consultation with DFO.
Table 7: Wetlands Found Within the Littoral Zone of Ruth Falls Headpond. Wetland ID Number Wetland Type Wetland Description 1 Coniferous treed shore bog No 2 Coniferous treed shore bog No 3 Coniferous treed shore bog (two subtypes) Yes 4 S...
AI summary A survey of the littoral zone of Ruth Falls Headpond identified various wetland types, but no rare or endangered species were found during field surveys. However, historical records from 2017 indicate the presence of two rare species near the area, though they are not expected to be affected by the headpond's drawdown.
CI 50518 CA IR-5 Attachment 1 Page 95 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Figure 4: NS Department of Lands and Forestry Wetland Inventory Ma...
AI summary NS Power is preparing a monitoring plan for the Ruth Falls Dam Refurbishment, considering the potential short-term impact of a 9-month drawdown on wetlands. While long-term impacts are not anticipated, the extent of potential effects remains unknown.
4.6.3.1 Wetland Monitoring Plan While no permanent long-term alterations to the wetlands on Ruth Falls Headpond are anticipated, NS Power proposes to contract a third-party qualified wetland consultant to develop and execute a wetland moni...
AI summary NS Power plans to implement a wetland monitoring program for the Ruth Falls Headpond project, involving a third-party consultant to monitor wetland health, species cover, soil and water levels, and impacts on fish and fish habitat.
CI 50518 CA IR-5 Attachment 1 Page 96 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Tusket Main Dam Refurbishment Project, which involves a similar dr...
AI summary NS Power proposes using a previously approved monitoring plan from the Tusket Main Dam project for the Ruth Falls Dam refurbishment, including baseline, construction, and post-construction monitoring of wetlands and fish habitat. A condition is requested for submitting the wetland monitoring plan to DFO by March 31, 2022, with a post-construction program to be submitted by December 31, 2022.
4.7 REPORTING NS Power will provide a report on 2022 drawdown monitoring activities by December 31, 2023, detailing results of the fish rescue survey and mortality estimates, estimates for loss of egg/larval stage fish due to stranding, re...
AI summary NS Power will submit a report by December 31, 2023, detailing 2022 drawdown monitoring activities, including fish rescue surveys, mortality estimates, habitat assessments, and water quality surveys as mandated by ECC.
Construction Monitoring NS Power requires that the main civil contractor (or general contractor) develop a site-specific water management and erosion and sedimentation control plan that must align with NS Power's established water manageme...
AI summary NS Power requires contractors to develop site-specific environmental plans aligned with its standards, including water management and erosion control. Both the contractor and NS Power implement inspection programs to ensure compliance with environmental standards, with a summary report to be submitted to DFO by December 31, 2023.
Post-Construction Monitoring NS Power will monitor the operation of the new dam structure as part of its regular bi-annual dam inspection and maintenance program as well as weekly inspections conducted by Hydro Operations. NS Power does no...
AI summary NS Power will monitor the new dam structure through regular inspections and a two-year post-construction monitoring plan. This includes an engineering assessment of the louvre system, an acoustic tracking study, and monitoring using a camera system on the fish ladder. The plan will be submitted to DFO by January 1, 2023.
Death of Fish/HADD after Avoidance and Mitigation Measures and Standards Table 8 provides a summary of potential impacts to fish and fish habitat including proposed mitigation and potential for death of fish and/or harmful alteration, disr...
AI summary Table 8 summarizes potential impacts to fish and fish habitat, including proposed mitigation measures and the potential for death of fish and/or harmful alteration, disruption, or destruction of fish habitat (HADD) resulting from water management activities associated with the Ruth Falls Dam refurbishment.
Table 8: Residual Harm from Potential Impacts Associated with the Ruth Falls Dam Refurbishment Potential Effect Spatial Extent of Probability Magnitude Measures to Potential Potential Effect of Potential of Potential Mitigation Residual Ef...
AI summary Table 8 outlines the residual harm from potential impacts associated with the Ruth Falls Dam Refurbishment, focusing on temporary and permanent effects on fish habitat, fish mortality, and migration. The table includes spatial extent, probability, magnitude, mitigation measures, and residual harm for each potential effect.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
Effects to fish and fish habitat due to Localized: Ruth Falls Low Low Refer to No residual sedimentation of the river from Headpond, East River Section 3 HADD construction activities of Sheet Harbour anticipated Release of hazardous materi...
AI summary The text discusses potential environmental effects on fish and fish habitat due to construction activities and equipment use at various locations, including sedimentation, release of hazardous materials, and changes to fish passage. It references sections and terms like HADD and indicates no residual effects.
CI 50518 CA IR-5 Attachment 1 Page 100 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan NS Power has obtained a letter of credit for the offset project,...
AI summary NS Power has obtained a letter of credit for the offset project related to the Ruth Falls Dam Refurbishment, estimated based on a 5:1 ratio from the Sloane project and a previous plan by MCG for the Trenton Generating Station in 2019. The letter of credit amount is currently set at $62,000 and may be adjusted once the final cost is determined.
CI 50518 CA IR-5 Attachment 1 Page 104 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) River Restoration Work: The previous four summers (2014-2018) MCG installed and repaired in-stream fish habitat structures, removed barriers to fish...
AI summary From 2014 to 2018, the Mi'kmaw Conservation Group (MCG) conducted river restoration work, including installing and repairing in-stream fish habitat structures, removing barriers to fish passage, and restoring riverbanks in several waterbodies such as McLellans Brook, Barneys River, Smalls Brook, Indian Brook, and tributaries to the Stewiacke River.
Goal: As part of a contract under NSPI the DARFM along with the NSSA will develop and implement an offsetting project for 5000m 2 on the West River Sheet Harbour watershed. The offset project relates to NSPI dam refurbishment projects at t...
AI summary As part of a contract with NSPI, DARFM and NSSA will implement a seven-year offset project on the West River to improve fish migration and habitat, focusing on restoring instream and streambank areas. The project will involve Millbrook, NSSA, and CMM, with monitoring activities planned for years one, three, five, and seven.
Objective 2: Baseline monitoring and post-restoration monitoring: The NSSA will utilize existing data to ensure there is adequate pre restoration monitoring completed and perform more work in partnership with the CMM if required. Based off...
AI summary The NSSA will use existing data to ensure pre-restoration monitoring is complete and will collaborate with the CMM and Millbrook to conduct post-offset monitoring over three years (years 3, 5, and 7) following the completion of instream offsetting work.
Monitoring strategy and techniques: - Visualization: - o Map will be created to show proposed monitoring sites and structure placements. - o Site pictures taken at each survey site and structure site, including original orientation to allo...
AI summary The document outlines monitoring strategies and techniques for environmental impact assessments, including visualization methods, habitat surveys, cross-sectional surveys, and water temperature monitoring. These methods aim to track the presence of fish, habitat characteristics, and water conditions at various sites.
Objective 2: Baseline monitoring and post-restoration monitoring: The freshwater biologist has indicated that from their desktop analysis and previous work upriver and downriver of this proposed site that the design width of this section o...
AI summary The document discusses baseline and post-restoration monitoring for a river section, highlighting degraded fish habitat due to past land use and restoration efforts by the NSSA. Instream improvements, such as deflectors and rock sills, are planned to aid fish migration and habitat continuity.
Large scale restoration: - The NSSA will lead the large-scale restoration work to be completed and will arrange the scheduling for their contractors (heavy machinery, freshwater habitat restoration consultant) to ensure the work is complet...
AI summary The NSSA will lead large-scale restoration efforts, coordinating contractors and consultants. The CMM will conduct site visits, mentor staff, and involve Millbrook community members in the project where appropriate, ensuring necessary training is provided.
Post Monitoring: The post-offset monitoring techniques will heavily mirror the techniques used in the pre-offset monitoring plan, the major difference being that in the post-offset there will be more focus on inspecting the structures and...
AI summary Post-offset monitoring will follow techniques from the pre-offset plan, with a focus on inspecting structures and pools to ensure habitat creation and structural integrity. The project team, including Millbrook, NSSA, and CMM, will monitor progress in years 3, 5, and 7 of the proposed plan, with potential changes to the plan as initial monitoring is completed.
CI 50518 CA IR-5 Attachment 1 Page 111 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - o Surveys to ensure structures have stayed in place and are establishing positive habitat change. - Note: will document any changes or damage cause...
AI summary The text outlines monitoring activities for habitat structures and water temperature in a river environment. It includes documentation of structural integrity, habitat changes, stream bank vegetation, pool and meander measurements, and fish presence. Water temperature loggers are to be installed at similar sites as in year one, with potential site adjustments due to habitat changes.
Appendix: See below NSSA's technical document which elaborates more on the restoration portion of the offset project which will be led by the NSSA. "Habitat Offsetting Proposal"
AI summary The document references a technical document from the NSSA that details the restoration portion of an offset project, which will be led by the NSSA under the 'Habitat Offsetting Proposal'.
HABITAT PARTNERS: Nova Scotia Salmon Association, Thaumas Environmental Consultants Ltd., Mi'kmaw Conservation Group (Confederacy of Mainland Mi'kmaw), Eastern Shore Wildlife Association
AI summary The text lists organizations involved in habitat partners related to environmental and aquatic resource management in Nova Scotia.
OBJECTIVE: Detail an option for freshwater habitat restoration project to be considered for future offsetting projects.
AI summary The objective is to detail an option for a freshwater habitat restoration project that could be considered for future offsetting projects.
PROPOSED PROJECTS: PROJECT #1: Main Branch, West River (Marinette) Estimated area: 5,000 m 2 proposed in this work. Part of a larger 20,090 m 2 segment Primary Issue: The main West River has been over-widened, straightened and has lost its...
AI summary Project #1 at Main Branch, West River proposes restoring 5,000 m² of the river to improve Atlantic Salmon habitat. The site was previously treated for acid rain impacts and has prior restoration work. The project includes rock deflectors and woody debris to restore natural flow and increase habitat diversity.
CI 50518 CA IR-5 Attachment 1 Page 124 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 2 – Example of proposed work. Shown are two habitat structures spanning nearly 300m just downstream of the worksite proposed in this document....
AI summary Figure 2 illustrates a proposed habitat restoration project, showing two habitat structures spanning nearly 300m downstream of a worksite. The image compares pre-installation and post-restoration conditions, highlighting improvements in river thalweg definition and pool habitat proportion.
CI 50518 CA IR-5 Attachment 1 Page 125 of 132 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Estimated cost: Based on our 2016-2018 project in this area, we would estimate the total cost of completing this work to be approx. $125,000 + tax fo...
AI summary The estimated cost for a habitat restoration project is approximately $156,750, including contractor and consultant fees, with additional costs dependent on DFO-mandated monitoring. The project is located downstream at coordinates 45.9718°, -062.6383°, and involves coordination with NSSA and local Mi'kmaw community members.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir within the Sheet Harbour Hydroelectric System to accommodate refurbishments at the Ruth Falls Reservoir (the Project). Str...
AI summary Nova Scotia Power Inc. plans to temporarily lower the headpond at the Ruth Falls Reservoir for refurbishment. Strum Consulting was hired to develop a monitoring plan to assess the impact of this action on wetlands and fish habitat.
Wetlands Wetland delineation was completed along the shores of the Ruth Falls Reservoir during the Vegetation Surveys at the Sheet Harbour Hydroelectric System completed by Jacques Whitford (JW) in 2007 (JW, 2007). As a result of this deli...
AI summary Wetland delineation was completed along the shores of the Ruth Falls Reservoir in 2007 by Jacques Whitford as part of a vegetation survey. The survey identified 21 wetlands contiguous with the headpond. A monitoring plan for wetland and fish habitat was submitted by Nova Scotia Power Inc. in February 2022.
Review of Fish Sampling Results A review of all fish sampling conducted by NSPI will be completed for all data available prior to the commencement of monitoring. The review will involve data compilation of fish species and abundance, infor...
AI summary This section outlines the review of fish sampling results conducted by NSPI, focusing on data compilation of fish species, abundance, migratory periods, and habitat requirements prior to the start of monitoring.
PROPOSED SCHEDULE AND REPORTING Annual post-construction monitoring reports will be submitted to Nova Scotia Environment and Climate Change (NSECC) for the five years of post-construction monitoring. Vegetation results shall be provided in...
AI summary The document outlines the requirement for annual post-construction monitoring reports to be submitted to Nova Scotia Environment and Climate Change over five years. Vegetation results will be presented in a cumulative table for inter-annual comparison. Tables 4 and 5 detail the monitoring and reporting schedules for the Wetland Monitoring Program and the Wetland Fish Habitat Monitoring Program, respectively.
Table 5. Monitoring and Reporting Schedule for Wetland Fish Habitat Monitoring Monitoring Event Fish Habitat Transect Monitoring Desktop Review of Fish Data Reporting Submission to NSECC & DFO Pre-construction Baseline ✓ ✓ ✓ 1 week after d...
AI summary Table 5 outlines a monitoring and reporting schedule for wetland fish habitat monitoring, detailing events such as pre-construction, during construction, and post-construction, with specific monitoring and reporting requirements for each phase.
3.2 FISH ENTRAINMENT MONITORING EAST RIVER Monitoring of fish entrainment during the drawdown will be conducted downstream of the Ruth Falls Flowage dam in East River. Based on aerial imagery, East River downstream of the Ruth Falls Dam co...
AI summary Fish entrainment monitoring during the drawdown of the Ruth Falls Flowage dam in East River will be conducted using a rotary screw trap. The trap is to be installed downstream of the dam, and monitoring will occur over six days, starting one day before the drawdown and ending one day after it completes.
3.3 SHORELINE HABITAT CHARACTERIZATION Aerial imagery will be collected within the reservoir at set intervals to allow NS Power to document changes to aquatic habitat. Aerial imagery collection will consist of three surveys conducted durin...
AI summary Aerial imagery will be collected at specific intervals within the Ruth Falls Flowage reservoir to document changes in aquatic habitat. The imagery will be captured using a fixed-wing remotely piloted aircraft system and processed into a geo-referenced orthomosaic for habitat analysis by NS Power.
CI 50518 NSUARB IR-12 Attachment 8 Page 13 of 14 REDACTED (CONFIDENTIAL INFORMATION REMOVED) RUTH FALLS REBUILD: FISH ENTRAINMENT STUDY FIELD PLAN Project Schedule March 24, 2022
AI summary This document outlines the project schedule for the Ruth Falls Rebuild Fish Entrainment Study Field Plan, dated March 24, 2022. It is part of a regulatory proceeding involving environmental compliance and fish habitat protection.
CI 50518 NSUARB IR-12 Attachment 9 Page 2 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Pêches et Océans Canada Our review considered the following information: - Fisheries and Oceans Canada Request for Review and attached information,...
AI summary The document outlines the review process of an application by NS Power, considering various submissions and correspondence related to environmental compliance. The application was found incomplete due to missing information required under the Fisheries Act and related regulations.
CI 50518 NSUARB IR-12 Attachment 9 Page 6 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Fisheries and Oceans Canada Pêches et Océans Canada bypassing eels downstream NS Power will engage a professional engineering and fish passage consu...
AI summary The document outlines actions to be taken by NS Power to improve fish passage effectiveness for American eels and other species, including engaging a consultant to assess and modify the existing louvre system. It also requests an explanation of improvements made or planned, their compliance with fish passage design criteria, and monitoring methods. Additionally, it asks for the inclusion of at least two habitat characterization transects in the Ruth Falls Headpond.
CI 50518 NSUARB IR-12 Attachment 9 Page 7 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) fish habitat functions). If this is to be part of the post-construction monitoring to be submitted later, state that in the plan.
AI summary The text discusses the requirement for post-construction monitoring of fish habitat functions and suggests that this should be explicitly stated in the plan if it is to be included.
Response to DFO Incomplete Letter Dated May 5, 2022 - Concordance Table DFO Information Request Section in FAA Application Additional Notes, if applicable An assessment by a qualified professional on potential impacts to upstream and downs...
AI summary The document responds to a request from the Department of Fisheries and Oceans (DFO) regarding an assessment of potential impacts on fish passage due to infrastructure design and operations at the Ruth Falls Hydroelectric Development. It outlines the need for measures to avoid, mitigate, or offset these impacts and references specific sections of the Fish and Aquatic Habitat (FAA) application.
CI 50518 NSUARB IR-12 Attachment 10 Page 16 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) cfs if water levels were to raise to 99 ft. There would be no negative impacts to the passage of water during all scenarios. Nova Scotia Environ...
AI summary The document discusses environmental requirements for operations at Ruth Falls and Marshall Falls, including minimum flow rates and water level restrictions. NS Power plans to maintain required flows during construction and is requesting variances for some conditions.
3.6 Erosion and Sedimental Control Plan Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the...
AI summary NS Power plans to use erosion and sedimentation control measures, including hay and silt fencing, to manage sediment-laden water during dewatering of the headpond. Water will be recovered and pumped to areas with vegetation for filtration, and NS Power will monitor water quality during the process.
CI 50518 NSUARB IR-12 Attachment 10 Page 20 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) the various return period flood events down the spillway channel. High return period flood events have been safely passed as part of past normal...
AI summary The text discusses the construction and refurbishment activities at the Ruth Falls Dam, including measures to manage erosion, sedimentation, and water flow. NS Power outlines plans for excavation, water management, and environmental protection during the project.
CI 50518 NSUARB IR-12 Attachment 10 Page 21 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 2: Potential locations for water filtration to support pumping activities. Areas to be field verified in spring 2024. The removal of acce...
AI summary NS Power is outlining measures to manage sedimentation and erosion during the removal of access road material at Ruth Falls Headpond. This includes using washed rock, siltation monitoring, and submitting a site-specific erosion and sedimentation control plan. NS Power will also monitor weather conditions and conduct inspections to ensure compliance with environmental standards.
CI 50518 NSUARB IR-12 Attachment 10 Page 23 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Removal of all applicable environmental controls and final site clean-up will take place over the following weeks. NS Power has developed a Gant...
AI summary NS Power outlines plans for environmental clean-up and construction sequencing, referencing a Gantt chart that may be subject to change. Authorization is requested to allow instream work until December 31, 2022.
CI 50518 NSUARB IR-12 Attachment 10 Page 31 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - The installation of a temporary bridge and access roads for machinery on both the upstream and downstream sides of the dam, resulting in a tem...
AI summary The text discusses the environmental impacts of a dam refurbishment project, including temporary habitat loss, fish passage disruptions, and mitigation measures. NS Power argues that the project will not significantly affect fish populations due to the temporary nature of the drawdown and planned improvements to fish passage infrastructure.
Table 7 - Summary of potential effects on fish and fish habitat due to refurbishment of the Ruth Falls Main Dam Potential Effect Spatial Extent of Potential Effect Probability of Potential Effect Magnitude of Potential Effect Temporary los...
AI summary The table summarizes potential effects on fish and fish habitat due to the refurbishment of the Ruth Falls Main Dam. Effects include temporary habitat loss, fish mortality, and changes to fish passage. Most effects are localized and have low probability or magnitude, except for the potential effects on upstream fish passage, which has a high magnitude.
12.1 3D Hydraulic Modelling NS Power engaged CBCL Ltd. And Thaumas Environmental to complete 3D hydraulic modeling to assess post-refurbishment hydraulic conditions. The objective of the modeling was to evaluate whether the refurbishment a...
AI summary NS Power conducted 3D hydraulic modeling to assess the impact of a dam refurbishment on fish passage. The modeling evaluated various flow conditions, ecological flows, and gate configurations to optimize fish migration. The study supports maintaining a minimum ecological flow to ensure optimal fish passage downstream of the dam.
CI 50518 NSUARB IR-12 Attachment 10 Page 35 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - The current ecological flow for the upper technical (concrete) fish ladder and louver (downstream bypass) system (6 cfs and 29 cfs, respective...
AI summary The document outlines modifications to fish ladder systems and flow management practices to ensure ecological flow and improve fish passage. Adjustments to attraction flow and gate operations will be made, with spill management and supplemental flows planned to support aquatic species.
12.2.2 Downstream Louvre System Improvements The assessment of downstream passage included looking at the existing infrastructure to evaluate the effectiveness of a louvre system at facilitating downstream passage for species that would be...
AI summary The document discusses improvements to the downstream louvre system to enhance fish passage effectiveness, including repairs to slats, installation of a trap funnel and bottom orifices, and the addition of a ramp to aid bottom-dwelling species. These changes are intended to meet fish passage design criteria and support the life cycle of aquatic species.
CI 50518 NSUARB IR-12 Attachment 10 Page 38 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - the convergence of the slates in order to find the bypass pipe. Refer to Appendix D for detailed design of the new ramp. - Realignment of the...
AI summary The document outlines improvements to the bypass pipe and fish passage design, including realignment of the bypass outfall and adjustments to the plunge pool depth to meet USFW criteria. It also mentions the commitment to conduct an eel pit-tagging study after completing louvre system improvements.
13.0 MEASURES AND STANDARDS TO AVOID OR MITIGATE SERIOUS HARM TO FISH NS Power recognizes DFO's mitigation hierarchy, which emphasizes that efforts must be made to prevent impact first and, where avoidance is not possible, efforts must be...
AI summary NS Power acknowledges the need to mitigate impacts on fish and fish habitat due to the Ruth Falls dam refurbishment project. Measures include controlled drawdown of the reservoir, maintaining water flow for spawning, and offsetting habitat loss. Temporary habitat loss from construction activities is also addressed through mitigation strategies.
CI 50518 NSUARB IR-12 Attachment 10 Page 42 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) potential to create access from the west side;however, it will be accessible once the downstream access roads and bridge are installed. Temporar...
AI summary The document discusses the temporary access roads construction and fish habitat loss in the East River of Sheet Harbour. It states that the temporary footprint is accounted for and that fish monitoring will be conducted during the installation. Nova Scotia Power argues that the habitat loss is not significant as the area is primarily bedrock and lacks spawning habitat.
14.0 MONITORING MEASURES Monitoring will be completed pre-construction, during, and post-construction to ensure mitigation measures proposed for potential impacts identified in Table 12 are effective. NS Power has developed a Monitoring Pl...
AI summary Monitoring measures for the project include pre-construction, during, and post-construction activities to ensure the effectiveness of mitigation measures. NS Power has developed a Monitoring Plan and a Project-specific environmental protection plan to address potential environmental risks and ensure compliance.
16.0 DEATH OF FISH AND HARMFUL ALTERATION, DISRUPTION, OR DESTRUCTION OF FISH HABITAT AFTER IMPLEMENTATION OF MEASURES AND STANDARDS Table 8 below provides a summary of potential impacts to fish and fish habitat including proposed mitigati...
AI summary The Ruth Falls Dam refurbishment project may result in temporary fish habitat loss and residual fish death due to drawdown. No permanent impacts to the East River or Ruth Falls Headpond are anticipated beyond the new dam footprint. Mitigation measures are proposed to compensate for these impacts.
Temporary loss of fish habitat (approximately 1.15 km2 ) due to lowering of the reservoir beyond the minimum operating level observed from April 1 – Nov. 30 annually. Lowering the headpond approximately 18' is required in order to complete...
AI summary The temporary loss of fish habitat due to lowering the Ruth Falls Dam reservoir is necessary for refurbishment. NS Power acknowledges the impact and proposes mitigation measures to minimize effects on fish habitat, including a controlled drawdown and maintaining water flow.
18.0 OFFSETTING CREDIT NS Power is proposing, in partnership with the Mi'kmaw Conservation Group (MCG) and the Nova Scotia Salmon Association (NSSA), a restoration project that is suitable for offsetting of serious harm for the Ruth Falls...
AI summary NS Power, in collaboration with the Mi'kmaw Conservation Group and the Nova Scotia Salmon Association, is proposing a fish habitat restoration project to offset the environmental impact of the Ruth Falls Dam refurbishment. The project involves habitat restoration on the West River and includes a detailed schedule and monitoring plan. A letter of credit for $62,000 has been secured for the project.
CI 50518 NSUARB IR-12 Attachment 10 Page 103 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2009 / 2010 Eel Study Summary Ruth Falls Downstream Louvre System Based on this information NSP decided to conduct a more robust study in 2010...
AI summary In 2009 and 2010, NSP conducted studies on eel migration, focusing on survival rates and the effectiveness of bypass systems. The 2010 study used acoustic tags and receivers to track eels, though the setup could not distinguish between eels using the bypass and those going over the spillway.
CI 50518 NSUARB IR-12 Attachment 10 Page 106 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2009 / 2010 Eel Study Summary Ruth Falls Downstream Louvre System Upon completing the study, the following results were concluded: - 30 eels we...
AI summary A 2009/2010 study on eels found that 30 eels were tagged. Of these, 9 survived and exited via the spillway or louvre bypass, while 21 entered the canal. Of the 21, 8 survived and exited to the river and estuary, while 13 were last seen in the canal and presumed to have died from turbine interaction.
Figure 4: Study Result Breakdown PASSAGE ROUTE 30 Total Fish No Turbine Turbine Number 30 9 21 % 30.0 70.0 RIVER ROUTE MORTALITY CANAL / TURBINE ROUTE MORTALITY 9 Fish Alive Mortality Observed 21 Fish Alive Mortality Observed Number 9 9 0...
AI summary Figure 4 presents a study result breakdown, showing the mortality rates of fish in different routes (passage, river, and canal/turbine). The data indicates that 70% of fish died in the turbine route, while no mortality was observed in the passage route. Overall, 43.3% of fish experienced mortality.
CI 50518 NSUARB IR-12 Attachment 10 Page 214 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Selected Species Migration Times/Needs Past the Dam Migration Requirements Assessed Typical Size Range (cm) Assessed Size (cm) - water depth -...
AI summary The table outlines migration times, needs, and assessed requirements for Atlantic Salmon and American Eel, including factors like water depth, velocity, temperature, and swimming ability. The size range and assessed sizes for each species are also provided, with a note that larger sizes were assessed for Atlantic Salmon to ensure passage.
The Fishway Flows The upper, concrete section of the fishway has been designed to operate with 1 ft of water over the crests of the notches with the water level in the pool below equal to the elevation of the notch crest. The velocity in t...
AI summary The fishway design ensures adequate water flow and velocities for fish migration. Velocities range from 1 ft/sec to 6 ft/sec, with resting areas in pools. The design accommodates most migratory species, except the smallest eels. Figures illustrate velocity patterns and flow dynamics.
CI 50518 NSUARB IR-12 Attachment 10 Page 250 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 27 There is a large resting area on the right side of the spill flows where eels can gather before heading towards the fishway. The velocities...
AI summary The text describes the movement of eels through different routes near a spill flow and fishway. It outlines the varying water velocities and depths along the yellow and green routes, impacting the ability of eels of different sizes to pass through successfully.
CI 50518 NSUARB IR-12 Attachment 10 Page 263 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) APPENDIX H – ASSESSMENT OF UPSTREAM AND DOWNSTREAM FISH PASSAGE
AI summary This document provides an assessment of upstream and downstream fish passage as part of a regulatory proceeding. It focuses on the impact of infrastructure on fish migration and is part of a larger submission involving environmental considerations.
2. Site Visit On May 31, 2022, Thaumas Environmental and Wood Canada Limited (Wood) visited the fish diversion louvers at the entrance to the Ruth Falls power canal in Sheet Harbour, NS. The purpose of the site visit was to determine the c...
AI summary On May 31, 2022, Thaumas Environmental and Wood Canada Limited conducted a site visit to assess the fish diversion louvers at the Ruth Falls power canal in Sheet Harbour, NS. The purpose was to evaluate the current configuration and functionality of the louvers and assess opportunities for improving downstream American silver eel passage. A second visit was conducted in October 2022 to check flow volume and configuration.
CI 50518 NSUARB IR-12 Attachment 10 Page 286 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - 3) The bypass pipe outfall drop to the river and plunge pool as currently operating meets the drop and depth requirements to ensure it is saf...
AI summary The text discusses modifications to a bypass pipe outfall and louver system to improve fish passage, particularly for eels. Concerns include compliance with USFW criteria, the need for condition assessments and repairs, and recommendations for monitoring studies. The current system has issues with leakage and spill, and the proposed changes aim to enhance downstream passage for eels and other species.
CI 50518 NSUARB IR-12 Attachment 10 Page 288 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Piper, Adam T. 2015, Jon C. Svendsen, Rosalind M. Wright, Paul S. Kemp, Movement patterns of seaward migrating European eel (Anguilla anguilla)...
AI summary The text presents several research studies and a technical report focused on the movement patterns and behavior of European eels and other fish species in relation to riverine barriers and fish exclusion facilities. These studies provide insights into fish migration and conservation efforts.
1.0 Introduction This monitoring plan outlines NS Power's proposed monitoring activities, and additional avoidance and mitigation measures for the Ruth Falls Dam Refurbishment Project (the Project) as well addresses DFO's request for addit...
AI summary NS Power's monitoring plan for the Ruth Falls Dam Refurbishment Project outlines proposed activities, including entrainment and wetland monitoring, as well as construction activities such as lowering the headpond and installing new spillway sections. The plan also addresses DFO's request for additional information.
CI 50518 NSUARB IR-12 Attachment 10 Page 302 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan NS Power has considered the potential environmental and arc...
AI summary NS Power has evaluated the environmental and safety risks of lowering the Ruth Falls Headpond for the refurbishment project and believes this approach is the safest and most efficient, despite potential risks. Alternative methods such as bulkheads and cofferdams were considered but deemed less viable due to safety and scheduling concerns.
CI 50518 NSUARB IR-12 Attachment 10 Page 303 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan - After the water is at an elevation of 91 ft, construction...
AI summary The text outlines the timeline and approach for the Ruth Falls Dam Refurbishment project, including the installation of upstream access roads, refurbishment of the dam and sluiceway bays, and improvements to fish passage. The project is expected to be completed by April 1st, 2025, with contingency plans in place if the work cannot be finished during the initial construction season.
CI 50518 NSUARB IR-12 Attachment 10 Page 304 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan the temporary footprint to be a HADD as per the above ratio...
AI summary The Ruth Falls Dam Refurbishment project will temporarily impact fish and fish habitat due to drawdown activities and changes to the fish ladder. However, these effects are expected to be short-term and minimal, with mitigation measures in place to support fish passage and habitat recovery. The project will not result in permanent habitat loss.
3.4 WATER QUALITY The Ruth Falls Headpond is a relatively small, shallow headpond with depths of up to 26.2 ft (8 m) in the deepest parts. Water quality of the headpond is heavily influenced by inflows from the Grant River Watershed as wel...
AI summary The Ruth Falls Headpond's water quality is influenced by inflows from the Grant River Watershed and the East River. NS Power conducts water quality surveys as part of the relicensing process. The headpond exhibits acidic conditions and is classified as meso-eutrophic or eutrophic. A drawdown of 11 ft for 9 months may affect water quality, but continuous inflows are expected to maintain oxygen levels.
CI 50518 NSUARB IR-12 Attachment 10 Page 309 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan Sheet Harbour Hydro System for direct comparison to normal...
AI summary The document outlines the monitoring plan for the Ruth Falls Dam Refurbishment under the Fisheries Act Authorization. It includes water quality sampling from July to October, with monthly monitoring from July to November, focusing on parameters such as temperature, dissolved oxygen, and nutrient content.
3.5 TRIBUTARY MONITORING FISH ENTRAINMENT / DOWNSTREAM MONITORING The drawdown of the Ruth Falls Headpond will be conducted gradually to avoid creating excessive flows, which will reduce the risk of entrainment of fish and other species do...
AI summary NS Power plans to gradually draw down the Ruth Falls Headpond to minimize fish entrainment risks. A monitoring program will assess fish abundance before and during the drawdown, focusing on juvenile and adult fish, including eggs and larvae. A third-party consultant will conduct the study, and a detailed plan has been included in the application.
CI 50518 NSUARB IR-12 Attachment 10 Page 310 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan A similar study was carried out during the drawdown at the...
AI summary This text discusses the Ruth Falls Dam Refurbishment and its environmental monitoring plan, referencing a similar study conducted at the Tusket Dam. The study examined fish entrainment and habitat conditions, concluding that suitable freshwater habitat exists downstream of the dam, and no fish mortality was observed.
3.6.2 Monitoring Transects Monitoring transects will also be completed once per month to supplement the drone surveys. Two (2) monitoring transect will be selected on Ruth Falls Headpond. The position of the transects will not be located r...
AI summary Monitoring transects will be conducted monthly on Ruth Falls Headpond to assess ecological changes during a drawdown. Transects are strategically placed based on drone surveys to monitor high-diversity areas. Data from transects and drone surveys will evaluate habitat and vegetation changes, with NS Power noting that short-term changes may not indicate permanent harm.
CI 50518 NSUARB IR-12 Attachment 10 Page 318 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan - An updated desktop assessment, using an updated ACCDC sea...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project, including wetland and fish habitat assessments, baseline and post-construction monitoring, and reporting schedules. The plan involves collaboration with the NSECC Wetland Specialist and includes specific wetland locations for monitoring.
3.8 REPORTING NS Power will provide a report on 2024 drawdown monitoring activities by December 31, 2025, detailing results of the fish rescue survey and mortality estimates, results and estimates for downstream entrainment and results of...
AI summary NS Power will submit a report on 2024 drawdown monitoring activities by December 31, 2025, including fish rescue survey results, mortality estimates, downstream entrainment results, habitat assessments, and water quality survey summaries as required by NSECC. Wetland monitoring reporting will follow the plan in Appendix M.
4.0 Construction Monitoring NS Power requires that the main civil contractor (or general contractor) develop a site-specific water management and erosion and sedimentation control plan that must align with NS Power's established water mana...
AI summary NS Power requires contractors to develop site-specific environmental plans, including water management and erosion control, which are reviewed by project managers and environmental leads. NS Power also implements its own Environmental Protection Plan (EPP) with regular inspections to ensure compliance. A summary report confirming compliance will be submitted to DFO by December 31, 2025.
5.2 FISH LADDER NS Power will complete monitoring activities associated with changes to the Ruth Falls Dam after construction is complete, including the improvements made to the fish ladder which includes the adjustment of weir sizing, not...
AI summary NS Power plans to monitor the effectiveness of fish ladder improvements at Ruth Falls Dam, including the use of AI cameras, daily inspections, and engagement with a fish passage specialist. Collaboration with DFO and contingency measures are also outlined.
5.3 LOUVRE SYSTEM Upon completion of the proposed improvements to the louvre system, NS Power is committed to completing a tagging study to assess how the changes impact the downward migration of eels. The results of this study will be use...
AI summary NS Power plans to conduct a tagging study in 2025 to assess the impact of improvements to the louvre system on eel migration. Results will be compared to a 2010 baseline study to evaluate improvements in diverting fish away from the powerhouse. If no improvement is observed, further adjustments to the louvre system may be considered.
CI 50518 NSUARB IR-12 Attachment 10 Page 323 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary This document outlines a monitoring plan for the Ruth Falls Dam Refurbishment under section 35(2)(b) of the Fisheries Act Authorization. It focuses on environmental monitoring and compliance with regulatory requirements during the refurbishment process.
Table 8: Residual Harm from Potential Impacts Associated with the Ruth Falls Dam Refurbishment Potential Effect Spatial Extent of Probabil Magnitu Measure Potential Residual Death of Potential Effect ity of de of s to Fish/HADD Potenti Pot...
AI summary The table outlines the residual harm from potential impacts associated with the Ruth Falls Dam Refurbishment, including temporary and permanent loss of fish habitat, fish mortality, and other environmental effects. Each potential effect is categorized by spatial extent, probability, magnitude, and mitigation measures.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) CI 50518 NSUARB IR-12 Attachment 10 Page 327 of 591 RUTH FALLS REBUILD: FISH ENTRAINMENT STUDY - FIELD PLAN
AI summary The document outlines a field plan for a fish entrainment study related to the Ruth Falls Rebuild project. The study aims to assess the impact of the project on fish populations and their migration patterns.
CI 50518 NSUARB IR-12 Attachment 10 Page 328 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) RUTH FALLS REBUILD: FISH ENTRAINMENT STUDY – FIELD PLAN Introduction November 12, 2022
AI summary This document outlines the Field Plan for the Fish Entrainment Study related to the Ruth Falls Rebuild project, initiated on November 12, 2022. It provides an introduction to the study, which likely involves assessing the impact of the project on fish populations and aquatic ecosystems.
1.0 INTRODUCTION Stantec Consulting Ltd. (Stantec) has been retained by Nova Scotia Power Inc. (NS Power) to conduct fish entrainment monitoring as part of the Ruth Falls Rebuild Project (the Project). Specifically, Stantec is conducting a...
AI summary Stantec Consulting Ltd. is conducting fish entrainment monitoring for the Ruth Falls Rebuild Project, focusing on gaspereau and other species. Aerovision Canada Inc. is conducting aerial drone surveys to monitor habitat changes before and after the reservoir drawdown. This document outlines the field plan for the monitoring program.
3.1 BASELINE FISH ABUNDANCE SURVEY - RUTH FALLS FLOWAGE Prior to the drawdown a baseline fish abundance survey will be conducted in Ruth Falls Flowage. The baseline survey was developed to obtain a sample of YoY gaspereau to establish dens...
AI summary A baseline fish abundance survey will be conducted in Ruth Falls Flowage prior to a drawdown to assess YoY gaspereau density, length, and weight. The survey will use seining in the littoral zone, sampling up to 10 locations over one night, with specific attention to bathymetry, substrates, and shoreline access.
Fyke-Net Monitoring Fyke nets will be used during entrainment monitoring to assess other species and life stages of fish which may be entrained by the drawdown. Stantec proposes to set three fyke nets with ¼ inch mesh (6 mm) in suitable lo...
AI summary Stantec proposes using fyke nets with ¼ inch mesh to monitor fish entrainment during drawdown, with nets set in the morning and checked periodically. NS Power acknowledges that 24-hour sampling may not be feasible, potentially introducing bias in entrainment estimates.
3.3 SHORELINE HABITAT CHARACTERIZATION Aerial imagery will be collected within the reservoir at set intervals to allow NS Power to document changes to aquatic habitat. Aerial imagery collection will consist of three surveys conducted durin...
AI summary NS Power will conduct aerial imagery surveys of the Ruth Falls Flowage reservoir at three intervals—before, after, and in November 2024—to document changes in aquatic habitat. The imagery will be collected using a fixed-wing drone with high-resolution cameras and processed into geo-referenced orthomosaics for habitat analysis.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir (the Reservoir) within the Sheet Harbour Hydroelectric System to accommodate refurbishments (the Project). Strum Consultin...
AI summary Nova Scotia Power Inc. (NSPI) plans to temporarily lower the headpond at the Ruth Falls Reservoir for refurbishments. Strum Consulting was hired to develop a monitoring plan to assess the impact of this change on wetlands and fish habitat.
CI 50518 NSUARB IR-12 Attachment 10 Page 342 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary The document outlines a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir project, submitted by Nova Scotia Power Inc. on December 14, 2022, as part of the regulatory process for project #21-7960.
CI 50518 NSUARB IR-12 Attachment 10 Page 343 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project by Nova Scotia Power Inc. It includes pre-construction and post-construction monitoring phases to assess changes in wetland characteristics due to lowered water levels.
Methodology Wetland monitoring will include detailed vegetative, hydrological, and soil monitoring within the six selected wetlands. Each wetland to be monitored was delineated prior to the commencement of monitoring activities to ensure t...
AI summary The methodology outlines wetland monitoring procedures, including vegetative, hydrological, and soil monitoring. Vegetative assessments involve quadrats along transects, while monitoring wells and vegetation plots are standardized for consistency. Soil test pits are used to identify hydrological indicators, and photographs are taken for future comparison.
CI 50518 NSUARB IR-12 Attachment 10 Page 344 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This text outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project, led by Nova Scotia Power Inc. The plan includes timing of monitoring events to align with previous assessments and account for drawdown uncertainty, as well as the use of consistent data gathering techniques for ongoing evaluation.
CI 50518 NSUARB IR-12 Attachment 10 Page 345 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir, prepared by Nova Scotia Power Inc. on December 14, 2022. It includes information on migratory periods, species observed, and their habitat requirements.
CI 50518 NSUARB IR-12 Attachment 10 Page 346 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This document outlines a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir project, submitted by Nova Scotia Power Inc. on December 14, 2022. It includes plans for further surveys during drawdown and post-construction to assess conditions and compare them to baseline data.
CI 50518 NSUARB IR-12 Attachment 10 Page 347 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary The text references a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022, as part of Project #21-7960.
Table 3: Wetland Fish Habitat Monitoring Parameters and Methods of Assessment Monitoring Parameter Transect Portion to be assessed Methods of Assessment Photos OL, LS, BS Photos will be taken of the substrate (where applicable), vegetation...
AI summary This table outlines the monitoring parameters and methods for assessing wetland fish habitat, including photography, GPS mapping, vegetation and water quality assessments, and substrate analysis. It also addresses the need for adaptive monitoring during water level changes and safety considerations.
CI 50518 NSUARB IR-12 Attachment 10 Page 348 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary The document references a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022, as part of Project #21-7960.
CI 50518 NSUARB IR-12 Attachment 10 Page 349 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary The document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir, noting that water quality measurements were collected at specific locations. It highlights the presence of riparian buffers and the impact of forestry on surrounding properties, with details provided in Table 5.
Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21-7960 Wetland Open Lake Lakeshore Backshore Wetland 17 Quite shallow all around the wetland Shor...
AI summary The document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir, detailing habitat conditions across different zones such as wetlands, open lake, lakeshore, and backshore. Observations note varying substrate types, vegetation, and fish habitat quality, with some areas showing signs of potential flooding.
PROPOSED SCHEDULE AND REPORTING Annual post-construction monitoring reports will be submitted to Nova Scotia Environment and Climate Change (NSECC) for the five years of post-construction monitoring. Vegetation results shall be provided in...
AI summary Annual post-construction monitoring reports will be submitted to Nova Scotia Environment and Climate Change for five years. Vegetation results will be provided in a cumulative table for inter-annual comparison. Tables 6 and 7 outline the monitoring and reporting schedules for the Wetland Monitoring Program and Wetland Fish Habitat Monitoring Program, respectively.
CI 50518 NSUARB IR-12 Attachment 10 Page 351 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This document references a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022, as part of Project #21-7960.
Table6: Monitoring and Reporting Schedule for Wetland Monitoring Monitoring Event Wetland and Wetland Fish Habitat Monitoring WESP-AC Reporting Submission to NSECC Pre-construction Baseline ✓ ✓ During Construction ✓ Memo Post-construction...
AI summary This table outlines the monitoring and reporting schedule for wetland monitoring, including pre-construction, during construction, and post-construction phases. Post-construction monitoring will evaluate vegetation, hydrology, and soils, with long-term assessments and consultations after Year 5.
Table 7: Monitoring and Reporting Schedule for Wetland Fish Habitat Monitoring Monitoring Event Fish Habitat Transect Monitoring Desktop Review of Fish Data Reporting Submission to NSECC & DFO Baseline ✓ ✓ ✓ Pre-construction 1 week before...
AI summary Table 7 outlines a monitoring and reporting schedule for wetland fish habitat monitoring, including baseline, pre-construction, during construction, and post-construction events. It specifies the timing and frequency of fish habitat transect monitoring, desktop review of fish data, and reporting submission to NSECC and DFO.
CI 50518 NSUARB IR-12 Attachment 10 Page 352 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary A wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022, as part of project #21-7960.
CI 50518 NSUARB IR-12 Attachment 10 Page 353 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir December 14, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 21...
AI summary This document outlines a Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir project, submitted by Ms. Kailey Osborne of Nova Scotia Power Inc. on December 14, 2022. The plan is part of the project documentation for Project # 21-7960.
REFERENCES Environmental Services Nova Scotia Power. 2018. Sheet Harbour Hydro System Relicensing Report . Jacques Whitford. 2007. Report – Vegetation Surveys at the Sheet Harbour Hydroelectric System . Project No. 1026751. NSLC Adopt a St...
AI summary The references section lists several documents related to environmental assessments and fish habitat studies, including reports on hydroelectric systems and fish habitat suitability assessments.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) CI 50518 NSUARB IR-12 Attachment 10 Page 362 of 591 ATTACHMENT B WESP-AC FORMS CI 50518 NSUARB IR-12 Attachment 10 Page 363 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic De...
AI summary The text provides details of a wetland assessment conducted at Ruth Falls Wetland 3 on July 5, 2022, by Darcy Kavanagh and Angus Doane. The assessment includes geographic information, site details, and the use of the WESP-AC version 2 form for evaluating the wetland.
CI 50518 NSUARB IR-12 Attachment 10 Page 365 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3 # Indicators Condition Choices Data Definitions/Explanations 15 >100 hectares. 1 16 OF3 Ponded Water & Wetland Within 1 km. The area of wetla...
AI summary This table outlines indicators and condition choices related to environmental assessments, focusing on the size of wetlands, ponded water, and vegetated tracts within a specified area. It includes definitions and explanations for each indicator, such as the area of wetlands within 1 km and the size of the largest nearby vegetated tract.
CI 50518 NSUARB IR-12 Attachment 10 Page 373 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 114 Upland Edge species cannot be identified, answer "none". [PH, STR] 115 none of the upland edge (invasives apparently absent), or...
AI summary The table provides criteria for assessing wetland characteristics, including upland edge presence, fringe wetland conditions, lacustrine wetland size, and the percentage of the area without surface water. These assessments are tied to ecological factors and habitat types.
CI 50518 NSUARB IR-12 Attachment 10 Page 383 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 5 Investigator Name: Darcy Kavanagh & Angus Doane D...
AI summary This document is a field assessment form for a wetland site named Ruth Falls Wetland 5, conducted by investigators Darcy Kavanagh and Angus Doane on July 4, 2022. It includes details such as location, size, and information about the assessment process.
CI 50518 NSUARB IR-12 Attachment 10 Page 385 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 137 Is probably is not accessed by any anadromous fish species but is known or likely to have other fish at least seasonally. Is know...
AI summary The text discusses fish and wildlife conservation considerations, specifically focusing on anadromous fish species and the presence of rare plant, amphibian, and reptile species in a given area. It outlines the need for surveys and documentation of species presence for regulatory compliance.
Scores will appear below after data are entered in worksheets OF, F, and S. See Manual for definitions and descriptions of how scores were computed. Wetland Functions or Other Attributes: Function Score (Normalised) Function Rating Benefit...
AI summary This document presents a scoring system for evaluating wetland functions and benefits, including normalized and raw scores for various attributes such as water storage, sediment retention, and habitat support. It also includes grouped function scores and a final assessment indicating that the Habitat Rule was not satisfied.
Google Earth Pro : https://www.google.com/earth/download/gep/agree.html Provincial Landscape Viewer : https://nsgi.novascotia.ca/plv/ For most wetlands, completing this office data form will require 1-2 hours. For a list of functions to wh...
AI summary The text provides links to tools for wetland evaluation and describes the functions and codes used in the WESP-AC model, including water storage, sediment retention, and habitat for various species.
CI 50518 NSUARB IR-12 Attachment 10 Page 405 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2 15 >100 hectares. 1 16 OF3 Ponded Water & Wetland Within 1 km. The area of wetlands and surface water ponded during most of the growing seaso...
AI summary The document provides a table with criteria for assessing wetlands and vegetated areas near a project site. It includes measurements for ponded water and wetlands within 1 km of the area of assessment (AA) and details on the size of the largest nearby vegetated tract or corridor.
CI 50518 NSUARB IR-12 Attachment 10 Page 413 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 201 Little or none. 0 [AM, FA, FR, INV] 202 Intermediate. 0 203 Extensive. 0 F40 Isolated Island The AA contains (or is part of) an i...
AI summary The document outlines criteria for assessing aquatic habitats, including the presence of isolated islands and floating vegetation such as algae and duckweed. It includes scoring categories and conditions for evaluating the ecological significance of these features.
CI 50518 NSUARB IR-12 Attachment 10 Page 425 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3 # Indicators Condition Choices Data Definitions/Explanations 99 Upstream water, high temperatures) being present at levels harmful to aquatic...
AI summary This section outlines indicators for assessing water quality conditions, including upstream and downstream factors, and provides definitions for evaluating water quality based on federal and provincial standards. It also includes data collection and sampling considerations.
CI 50518 NSUARB IR-12 Attachment 10 Page 433 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 1 plant species. In riverine systems, the extent of this zone can be estimated by multiplying by 2 the 0 bankful height and visualisi...
AI summary The text provides guidance on estimating the extent of a riparian zone by multiplying the bankful height by 2 and identifying where it would intersect the land along the river. It also discusses methods for assessing annual water level fluctuations and determining the size of an area affected by surface water.
CI 50518 NSUARB IR-12 Attachment 10 Page 453 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 214 Leaves through natural exits (channels or diffuse outflow), not mainly through artificial or temporary features. 1 215 Is exporte...
AI summary The document presents a table with criteria for evaluating wetland features, including natural exits, water export through ditches or pipes, tributary channels, input water temperature, and throughflow resistance. These criteria are used in the assessment of aquatic areas and are relevant to conservation and environmental compliance.
CI 50518 NSUARB IR-12 Attachment 10 Page 465 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3 # Indicators Condition Choices Data Definitions/Explanations 71 None of the above (the closest patches or corridors that large are >1 km away...
AI summary The document presents a table with indicators and condition choices related to ecological assessments, including distance to large ponded water, tidal proximity, and upland edge contact. These indicators are used for evaluating wetland sensitivity and other ecological factors.
CI 50518 NSUARB IR-12 Attachment 10 Page 473 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E F35 Flat Shoreline Extent During most of the part of the growing season when water is present, the percentage of the AA's water edge...
AI summary The text presents a table with criteria related to wetland assessment, including flat shoreline extent and robust emergents, which are indicators used in evaluating wetland conditions. These metrics are relevant to ecological assessments and habitat classification.
Wetland 15 Carex trisperina Three seeded sedge 20 Myrica gale Sweetgale 60 25 Myrica gale Sweetgale 30 40 Chamaedaphne calyculata Leatherleaf 60 Chamaedaphne calyculata Leatherleaf 5 25 Shrubs Viburnum nudum Wild Raisin 25 Ledum groenlandi...
AI summary The text presents a table detailing vegetation data across different wetland sites, including species names, percentages, and notes. It includes information on various plant species, such as Carex trisperina, Myrica gale, and Viburnum nudum, along with their distribution percentages in July and September 2022.
Project Title: Sheet Harbour Area Habitat Offsetting Initiative
AI summary The document outlines the Sheet Harbour Area Habitat Offsetting Initiative, a project aimed at addressing habitat impacts through offsetting measures. It involves the Nova Scotia Utilities and Regulatory Board (NSUARB) and focuses on environmental compliance and regulatory oversight.
Goal As part of a contract under NSPI the DARFM, along with the NSSA, will develop and implement an offsetting project for 5000m 2 on the West River Sheet Harbour watershed. The offset project relates to NSPI dam refurbishment projects at...
AI summary The document outlines a project to develop and implement an offsetting project for 5000m² on the West River Sheet Harbour watershed, as part of a contract under NSPI. The project involves restoring fish habitat and improving fish migration, with active engagement from Millbrook First Nation and other stakeholders. The project spans eight years, with significant work planned for 2024 and monitoring activities in subsequent years.
Objective 2: Pre-offset baseline monitoring: - The pre-habitat offset monitoring work on the West River Sheet Harbour will involve performing habitat suitability assessments following established field methods 2 . While estimates of the si...
AI summary The pre-offset baseline monitoring on the West River Sheet Harbour will focus on habitat characteristics and channel morphologies, as there is a lack of recent data on fish abundance. The monitoring will assess changes in habitat features such as substrate composition, water temperature, and channel morphology, and will not prioritize water quality monitoring due to an ongoing liming project.
• Visualization: - o Map created to show monitoring sites and proposed structure placements - o Site pictures taken at each survey site and structure site, including original orientation to allow for replication in post construction monito...
AI summary The document outlines a visualization plan involving mapping monitoring sites and proposed structure placements, along with pre-monitoring habitat suitability index (HSI) assessments. The plan includes taking site pictures, assessing channel measurements, substrate composition, instream cover, and riparian characteristics to evaluate the presence of Atlantic salmon and other fish.
Objective 2: Post-restoration monitoring • The post-offset monitoring techniques will heavily mirror the techniques used in the pre-offset monitoring plan, the major difference being that in the post-offset there will be more focus on insp...
AI summary Post-restoration monitoring will use techniques similar to pre-offset monitoring, with a focus on inspecting structures and pools to ensure habitat creation and structural integrity. The project team, including Millbrook, NSSA, and CMM, will monitor progress in years 4, 6, and 8 of the proposed plan, with potential changes to the monitoring plan as the offset layout is developed.
Monitoring strategy and techniques: - Visualization: - o Site pictures taken at each survey site and structure site. - Pictures will be taken with the same orientation and matched with the map(s) established in year 1 - o Will document pre...
AI summary The monitoring strategy includes visualization techniques, habitat suitability index assessments, water temperature monitoring, and structure surveys to evaluate the impact of restoration efforts on fish populations and river conditions.
CI 50518 NSUARB IR-12 Attachment 10 Page 511 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) o Document presence of adult and or juvenile Atlantic salmon (and other salmonid / fish species) using habitat
AI summary The document discusses the presence of adult and juvenile Atlantic salmon and other fish species in their habitats, likely in the context of environmental assessments or regulatory considerations.
PROPOSED PROJECTS: PROJECT #1: Main Branch, West River (Marinette) Estimated area: 5,000 m 2 proposed in this work. Part of a larger 20,090 m 2 segment Primary Issue: The main West River has been over-widened, straightened and has lost its...
AI summary A restoration project is proposed for the Main Branch, West River in Marinette, Nova Scotia. The site has been impacted by historic log driving and poor land use practices, leading to poor habitat conditions for Atlantic Salmon. The project aims to restore the stream's natural pool-riffle-run sequence through narrowing the stream and adding habitat diversity structures.
1.0 Project Description and Overview of West River Sheet Harbour Site An approximately 5000 m 2 offsetting project was prescribed for the Ruth Falls Main Dam Refurbishment and Sloane Dam Rip Rap Stabilization projects. The Confederacy of M...
AI summary The West River Sheet Harbour restoration project aims to enhance aquatic connectivity and promote Atlantic salmon recovery. The project involves collaboration between the Confederacy of Mainland Mi'kmaq, Nova Scotia Salmon Association, and Millbrook First Nation. The area faces challenges such as low water levels, high acidity, and toxic aluminum levels, which have been mitigated by lime dosing since 2005 and habitat restoration efforts.
CI 50518 NSUARB IR-12 Attachment 10 Page 539 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) determined by noting the total proportion of the bankfull width which was covered in water. Wetted depths were determined by taking water depth...
AI summary The text describes field methods used to assess riverine habitats, including measurements of wetted width, depth, and the identification of thalweg and pools. The focus is on quantifying habitat characteristics relevant to fish cover and floodplain width.
Benthic macroinvertebrate observations were dominated by stoneflies and caddisflies at all assessments. Caddisflies were often identified by their cases. Both taxa are considered to be sensitive. Water pennies (family Psephenidae) were the...
AI summary Benthic macroinvertebrate observations showed dominance by stoneflies and caddisflies, both sensitive taxa. Water pennies were the only observed coleopterans. These findings indicate potential environmental conditions affecting aquatic ecosystems.
5.0 Rare Species within 100 km 5.1 Source Bibliography Map 1 . A 100 km buffer around the study area
AI summary This section discusses rare species within a 100 km buffer around the study area, referencing a map and a source bibliography. It sets the context for environmental considerations related to the project's impact on biodiversity.
CI 50518 NSUARB IR-12 Attachment 10 Page 563 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov A Myotis lucifugus Little B...
AI summary The document lists various endangered species in Nova Scotia, including bats, turtles, salmon, and birds, along with their conservation status, rarity rankings, and distances. These species are protected under provincial and federal legislation, highlighting the need for conservation efforts.
Data Report 7716: Ruth Falls Watershed, NS Page 8 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov A Hirundo rustica Barn Swallow Special Concern Threatened Endangere...
AI summary This table lists various bird and animal species in the Ruth Falls Watershed, including their conservation status, legal protections, and rarity rankings in Nova Scotia. Species such as the Barn Swallow, Canada Warbler, and Harbour Porpoise are highlighted with their respective conservation statuses under COSEWIC and SARA.
Data Report 7716: Ruth Falls Watershed, NS Page 10 of 22 Group A Scientific Name Passerella iliaca Common Name Fox Sparrow COSEWIC SARA Prov Legal Prot Prov Rarity Rank S3S4B,S5M # recs 115 Distance (km) 10.5 ± 0.0 Prov NS A Mergus serrato...
AI summary The document presents data on various species found in the Ruth Falls Watershed, including their scientific names, conservation status, and recorded distances. It includes information on endangered and threatened species such as the Ashton Cuckoo Bumble Bee and the Monarch, as well as their conservation statuses under COSEWIC and SARA.
Data Report 7716: Ruth Falls Watershed, NS Page 11 of 22 Group I Scientific Name Epitheca princeps Common Name Prince Baskettail COSEWIC SARA Prov Legal Prot Prov Rarity Rank S3 # recs 9 Distance (km) 85.4 ± 0.0 Prov NS I Sphaerophoria pyr...
AI summary The document lists various species found in the Ruth Falls Watershed, including their scientific names, conservation status, and distances from the site. Several species are identified as endangered, threatened, or of special concern under COSEWIC and SARA.
Data Report 7716: Ruth Falls Watershed, NS Page 13 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov N Melanohalea olivacea Spotted Camouflage Lichen S3S4 2 68.5 ± 0.0...
AI summary The document presents a table listing various species of lichens and plants in the Ruth Falls Watershed, Nova Scotia, along with their conservation status, rarity rankings, and distances from the site. Several species are noted as being at risk, with some classified as endangered or threatened under provincial and federal legislation.
CI 50518 NSUARB IR-12 Attachment 10 Page 574 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) # recs CITATION 434 SwiftWatch. 2022. Total Chimney Swift counts from roost watches for the duration of the SwiftWatch program (2011-2021). Bir...
AI summary The text lists various wildlife and habitat databases compiled by different organizations in Nova Scotia and Atlantic Canada, including records on Chimney Swifts, Piping Plovers, lichen, waterfowl, and colonial waterbirds. These databases were compiled by entities such as Birds Canada, the Canadian Wildlife Service, and the Mersey Tobeatic Research Institute.
Data Report 7716: Ruth Falls Watershed, NS Page 20 of 22 # recs CITATION 18 Bell, G. 2018. Moose, bat and bird records from Goldboro LNG Project, NS, Environmental Assessment. Amec Foster Wheeler. 18 Feltham, Carter. 2022. Monarch (Danaus...
AI summary The document presents a list of citations related to biodiversity and wildlife records in Nova Scotia, including studies on moose, bats, birds, and freshwater mussels. These records were compiled by various organizations and researchers over several years, contributing to environmental assessments and conservation efforts.
Data Report 7716: Ruth Falls Watershed, NS Page 21 of 22 # recs CITATION 5 Hughes, Cory. 2020. Atlantic Forestry Centre Coccinella transversoguttata collections. Canadian Forest Service, Atlantic Forestry Centre. 5 McNeil, J.A. 2020. Snapp...
AI summary The document lists various ecological and biodiversity-related records and reports, including species sightings, fieldwork, and conservation efforts in the Ruth Falls Watershed, Nova Scotia. These include contributions from multiple organizations and researchers, focusing on wildlife, plant, and habitat data.
Data Report 7716: Ruth Falls Watershed, NS Page 22 of 22 # recs CITATION 1 Belliveau, A.G. 2014. Plant Records from Southern and Central Nova Scotia. Atlantic Canada Conservation Data Centre, 919 recs. 1 Belliveau, A.G. E.C. Smith Herbariu...
AI summary The document lists various citations and records related to biodiversity and conservation efforts in the Ruth Falls Watershed, Nova Scotia. These include herbarium records, bird surveys, and species observations, contributing to ecological data collection and conservation initiatives.
CI 50518 NSUARB IR-12 Attachment 10 Page 590 of 591 REDACTED (CONFIDENTIAL INFORMATION REMOVED) placed in flowing water until processed. The selection of the most adequate location for the holding cage(s) will be based on the following con...
AI summary The document outlines procedures for handling and tagging fish during a study, including anesthetization methods, tagging techniques, and considerations for fish holding and release. It also mentions coordination with the Sheet Harbour Hydro Superintendent to maintain normal operations during the study.
Appendix K, Monitoring Plan - x NS Power states, "the East River watershed Ruth provides approximately 3 km of suitable freshwater habitat below the Ruth Falls dam and accordingly, NSP considers that entrainment of juvenile and adult fish...
AI summary NS Power discusses fish entrainment and monitoring plans at Ruth Falls, including the use of AI cameras, tagging studies, and offsetting measures for fish mortality. DFO requires offsetting for at least 50% of juvenile Alewives and potentially other species. Monitoring periods and species assessment are under review.
CI 50518 NSUIARB IR-12 Attachment 11 Page 6 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Fisheries and Oceans Canada Pêches et Océans Canada shown them to be < 30 % effective at diverting out-migrating silver American Eel from the powe...
AI summary NS Power is required to improve fish passage effectiveness at the power canal, as current measures are less than 30% effective at diverting out-migrating silver American Eel. The Department of Fisheries and Oceans Canada has indicated that turbine survival rates are approximately 62%, and further mitigation measures may be necessary.
Table 1: Estimated Flow and Velocities for an 8-day drawdown of Ruth Falls Heapond Time (day) Beginning Elevation (ft) Bays 1-15 Bays 16-30 Outer Sluice Middle Sluice Opening (ft) Total Discharge (cfs) Velocity through each bay (fps) Downs...
AI summary This table outlines the estimated flow and velocities during an 8-day drawdown of the Ruth Falls Heapond. The flow downstream is managed to prevent environmental impacts such as scour and sedimentation, with a focus on maintaining a 35 cfs maintenance flow and ensuring fish passage. NS Power will monitor water quality and conduct fish rescues during the drawdown.
CI 50518 NSUIARB IR-12 Attachment 12 Page 11 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Fish will have the ability to move downstream through the sluice bay during construction, with the exception of when the centre sluice bay gate...
AI summary The document discusses fish passage and water flow management during construction at Ruth Falls and Marshall Falls. It outlines the 35 cfs maintenance flow requirement and the use of sluiceway bays to ensure fish passage. NS Power is requesting a variance for certain conditions and flexibility in elevation requirements at Marshall Falls to manage water levels and reduce uncontrolled spill.
3.6 Erosion and Sedimental Control Plan Erosion and sedimentation control materials such as hay, silt fencing, etc., will be used to control sediment laden water from entering the headpond while it is dewatered. Any silt-laden water in the...
AI summary This section outlines NS Power's plan to manage erosion and sedimentation during dewatering activities, using materials like hay and silt fencing, and ensuring water quality is monitored during the process.
CI 50518 NSUIARB IR-12 Attachment 12 Page 15 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) the various return period flood events down the spillway channel. High return period flood events have been safely passed as part of past norma...
AI summary The document discusses flood management and erosion control measures for the Ruth Falls Dam project. It outlines inspection protocols, sedimentation control strategies, and water management plans to ensure environmental protection during construction. NS Power will use rockfill cofferdams, silt fencing, and designated filtration areas to minimize environmental impact.
CI 50518 NSUIARB IR-12 Attachment 12 Page 16 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 2: Potential locations for water filtration to support pumping activities. Areas to be field verified in spring 2024. The removal of acc...
AI summary NS Power plans to remove access road material at Ruth Falls Headpond, with siltation monitoring and erosion control measures in place. A site-specific erosion and sedimentation control plan is required from the contractor, and NS Power will conduct inspections and monitor weather to mitigate environmental impacts.
5.0 CONSTRUCTION SCHEDULE The Project is scheduled to take approximately nine (9) months to complete starting with the installation of the downstream access roads and temporary bridge in early July 2024. After the water is drawn down, the...
AI summary The construction schedule for the Project outlines a nine-month timeline starting in early July 2024, including the installation of access roads, temporary bridges, and dam construction. The schedule includes a controlled drawdown of the Ruth Falls Headpond to minimize environmental impact and ensure fish migration. Key activities include sluice gate installation, dam refurbishment, fish passage improvements, and final commissioning by April 2025.
CI 50518 NSUIARB IR-12 Attachment 12 Page 18 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Removal of all applicable environmental controls and final site clean-up will take place over the following weeks. NS Power has developed a Gan...
AI summary NS Power is outlining the removal of environmental controls and site clean-up, with a Gantt chart detailing the construction schedule. The authorization requested would permit instream work until December 31st, 2025.
9.0 CONSULTATIONS NS Power initiated Mi'kmaq engagement regarding the Ruth Falls Dam project with the Kwilmu'kw Mawklusuaqn Negotiation Office (KMKNO) in December 2017 during the One Window meeting to discuss 2018 hydro capital projects. N...
AI summary NS Power has engaged with various Indigenous groups and organizations throughout the Ruth Falls Dam project, including the Kwilmu'kw Mawklusuaqn Negotiation Office, Millbrook First Nation, and the Maritime Aboriginal People's Council. Consultations have included project updates, site visits, and discussions on environmental and archaeological considerations. Public engagement efforts are also planned.
CI 50518 NSUIARB IR-12 Attachment 12 Page 26 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) shore bogs, which are typically not tolerant of extended periods of deep flooding and indicates that Ruth Falls Headpond may have water level f...
AI summary NS Power acknowledges that the nine-month drawdown of Ruth Falls Headpond may impact wetlands but does not expect long-term effects. A third-party consultant will monitor wetland changes. No rare or endangered species were found during surveys in 2007 and 2023.
CI 50518 NSUIARB IR-12 Attachment 12 Page 28 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) during drawdown. There will be times at the end of the drawdown and during the summer when river flow drops below 100cfs and water depths on th...
AI summary The text discusses the potential impact of a project on fish and fish habitat during a drawdown period. It mentions that while water levels and flow rates may decrease, there are no significant obstructions to fish movement downstream due to sufficient water depths and acceptable velocities. A rock ledge near a dam gate is noted but is not expected to cause injury due to adequate flow depth.
Table 8 - Summary of potential effects on fish and fish habitat due to refurbishment of the Ruth Falls Main Dam Potential Effect Spatial Extent of Potential Effect Probability of Potential Magnitude of Potential Effect Effect Temporary los...
AI summary The table outlines potential effects on fish and fish habitat due to the refurbishment of the Ruth Falls Main Dam. Effects include temporary habitat loss, fish mortality, and impacts on fish passage. These effects are localized and generally have low to medium probability and low magnitude. The East River of Sheet Harbour is used for recreational fishing and traditional harvesting by the Mi'kmaw of NS.
12.1 3D Hydraulic Modelling NS Power engaged CBCL Ltd. and Thaumas Environmental to complete 3D hydraulic modeling to assess post-refurbishment hydraulic conditions. The objective of the modeling was to evaluate whether the refurbishment a...
AI summary NS Power conducted 3D hydraulic modeling to assess the impact of a dam refurbishment on fish passage. The modeling evaluated historical spill data, ecological flows, and fish ladder configurations to ensure optimal fish migration conditions downstream of the dam.
CI 50518 NSUIARB IR-12 Attachment 12 Page 31 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) considerations have been made to design and operations plans to allow for improved conditions below and at the fishway entrance. This includes...
AI summary The document outlines measures to improve fish passage conditions at a dam, including maintaining minimum ecological flows, modifying fish ladder sections, and optimizing gate usage. These actions aim to support upstream and downstream fish migration and avoid negative impacts on aquatic species.
12.2.1 Upstream Fishway Improvements Results of the 3D hydraulic modeling and professional evaluation determined that improvement to the lower non-technical section of the existing fishway should be made to improve passage for species migr...
AI summary The document discusses proposed improvements to an existing fishway to enhance upstream passage for migratory species, particularly gaspereau. The improvements include replacing existing weirs with new concrete weirs and adjusting the entrance orientation for better flow conditions.
13.0 MEASURES AND STANDARDS TO AVOID OR MITIGATE SERIOUS HARM TO FISH NS Power recognizes DFO's mitigation hierarchy, which emphasizes that efforts must be made to prevent impact first and, where avoidance is not possible, efforts must be...
AI summary NS Power acknowledges the DFO's mitigation hierarchy and outlines measures to avoid or mitigate harm to fish and fish habitat due to the Ruth Falls dam refurbishment. Temporary loss of fish habitat is unavoidable, but NS Power proposes mitigation strategies such as controlled drawdown of the headpond and offsetting measures.
CI 50518 NSUIARB IR-12 Attachment 12 Page 38 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) temporary access roads sit within the drawdown area. On the upstream side, access roads will be placed after the headpond has been drawn down a...
AI summary The text discusses the temporary access roads within the drawdown area of a dam and the fish habitat loss in the East River of Sheet Harbour. It mentions that fish monitoring and rescue will be conducted during road installation, and that NS Power does not consider the habitat loss downstream of the dam to be a significant environmental impact.
14.0 MONITORING MEASURES Monitoring will be completed pre-construction, during, and post-construction to ensure mitigation measures proposed for potential impacts identified in Table 9 are effective. NS Power has developed a Monitoring Pla...
AI summary Monitoring measures will be implemented pre-construction, during, and post-construction to ensure the effectiveness of mitigation measures for potential environmental impacts. NS Power has developed a Monitoring Plan and a Project-specific environmental protection plan to address environmental risks and ensure proper incident reporting and staff training.
CI 50518 NSUIARB IR-12 Attachment 12 Page 41 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Should mitigation measures prove to be ineffective, work will be stopped and issues reported to NS Power for resolution and reporting as requir...
AI summary The text outlines mitigation measures to be taken by NS Power to manage environmental impacts, including supervision, inspections, and contingency planning for water management. If mitigation fails, work will be halted and issues reported to NS Power for resolution.
16.0 DEATH OF FISH AND HARMFUL ALTERATION, DISRUPTION, OR DESTRUCTION OF FISH HABITAT AFTER IMPLEMENTATION OF MEASURES AND STANDARDS Table 10 below provides a summary of potential impacts to fish and fish habitat including proposed mitigat...
AI summary The text discusses potential impacts on fish and fish habitat due to the Ruth Falls Dam refurbishment, noting temporary direct loss of habitat and residual fish death from drawdown. No permanent impacts are anticipated, and compensation measures are proposed in Section 18.
Table 10 - Residual Harm from Potential Impacts Associated with the Ruth Falls Dam Refurbishment Potential Effect Measure to Mitigate Serious Harm Potential Residual Serious Harm to Fish Temporary loss of fish habitat (approximately 1.15 k...
AI summary The Ruth Falls Dam refurbishment will temporarily reduce fish habitat due to lowering the reservoir, but mitigation measures such as controlled drawdown and maintaining water flow are proposed to minimize impact. Some residual harm is expected.
18.0 OFFSETTING CREDIT NS Power is proposing, in partnership with the Mi'kmaw Conservation Group (MCG) and the Nova Scotia Salmon Association (NSSA), a restoration project that is suitable for offsetting of serious harm for the Ruth Falls...
AI summary NS Power, in partnership with the Mi'kmaw Conservation Group and the Nova Scotia Salmon Association, is proposing a fish habitat restoration project to offset the environmental impact of the Ruth Falls Dam refurbishment. The project involves creating two habitat blocks totaling 2700 m² to compensate for temporary habitat degradation and fish mortality.
CI 50518 NSUIARB IR-12 Attachment 12 Page 46 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - Temporary HADD of wetland fish habitat from drawdown activities. - Death of fish due to entrainment from drawdown activities. - Death of fish...
AI summary NS Power is proposing an offset project on the West River to compensate for fish habitat disruption and fish deaths caused by drawdown activities. The project involves habitat restoration and is in collaboration with MCG and the Millbrook First Nation. The offset is costly and includes long-term monitoring over seven years.
REFERENCE DESCRIPTION A ×, ×, ×, ×, × ×, ×, ×, ×, ×, ×, ×, × SEAL DEPARTMENTAL APPROVALS SCALE Nova Scotia A. ROSION PROVIDED AND SEDMENT CONTROL SHALL BE IN ACCORDANCE WITH LOCAL AND PROVINCE STANDARDS AND OWNER'S STANDARDS. ALL MEASURES...
AI summary The text outlines requirements for erosion and sediment control during construction projects, referencing local, provincial, and owner standards, as well as the Yor's Sotiol Department of Environment guidelines.
CI 50518 NSUIARB IR-12 Attachment 12 Page 98 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) APPENDIX F – EEL AND SALMON STUDY SUMMARY
AI summary This section provides an overview of the EEL and Salmon Study, which is part of the regulatory proceeding document. It outlines the key findings and considerations related to the environmental impact of the proposed project.
CI 50518 NSUIARB IR-12 Attachment 12 Page 105 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2009 /2010 Eel Study Summary Ruth Falls DownstreamLouvre System Basedon this information NSP conducted a secondstudy in 2010 specifically focu...
AI summary In 2009 and 2010, NSP conducted studies on eel migration, focusing on survival rates and the effectiveness of bypass systems. The 2010 study used acoustic tags and receivers to track eels, though the setup could not distinguish between eels using the louvre bypass and those passing over the spillway.
CI 50518 NSUIARB IR-12 Attachment 12 Page 106 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2009 /2010 Eel Study Summary Ruth Falls DownstreamLouvre System
AI summary This section references a 2009/2010 Eel Study Summary titled 'Ruth Falls DownstreamLouvre System' and includes a redacted image. The content appears to be related to an environmental or ecological study, though specific details are confidential and not disclosed.
CI 50518 NSUIARB IR-12 Attachment 12 Page 108 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2009 /2010 Eel Study Summary Ruth Falls DownstreamLouvre System Upon completing the study, the following results were concluded: - 30 eels wer...
AI summary A 2009/2010 eel study found that 30 eels were tagged, with 9 successfully passing through the spillway or louvre bypass, while 21 eels entered the canal, with 13 assumed to have died from turbine interaction.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) CI 50518 NSUIARB IR-12 Attachment 12 Page 115 of 576 Figure 1: Spill flow Timeseries from 2015 to 2022 at the Ruth Falls Dam As shown on the figure, spills are rather infrequent at this site. Spi...
AI summary The document discusses spill flow data from 2015 to 2022 at the Ruth Falls Dam, noting increased spills in 2021 and 2022 due to construction. Data from those years were excluded to reflect typical conditions. Seasonal flow duration curves are presented, and modeling indicates that 65 cfs of leakage through the dam structure provides optimal conditions for fish passage. Adjustments to weirs were made to improve fish passage.
CI 50518 NSUIARB IR-12 Attachment 12 Page 215 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) must be immediately below the dam. The supplemental flow events are intended to complement significant high flow events (i.e., ≥ 24 mm of rain...
AI summary The document discusses supplemental flow events designed to attract Atlantic Salmon to migrate upstream past a dam by providing adequate flow depth. Thaumas evaluated the swimming abilities and migration behaviors of several fish species, including Gaspereau, Brook Trout, Atlantic Salmon, and American Eels, to ensure the effectiveness of the flow events.
Gaspereau The route marked with green arrows follows the main thalweg of the river and will be the most used route for gaspereau as it is the easiest. Using this route fish can avoid velocities greater than 2 m/sec over the first sill by t...
AI summary The document describes the migration routes of gaspereau below a dam, analyzing the velocity of water and the resting areas available. The green route is the most used due to lower velocities, while the yellow and orange routes are less preferred due to increased distances and velocities. Fish are expected to rest below the dam before attempting to move upstream through the fishway.
CI 50518 NSUIARB IR-12 Attachment 12 Page 252 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 27 There is a large resting area on the right side of the spill flows where eels can gather before heading towards the fishway. The velocities...
AI summary The text discusses the movement of eels through different routes near a fishway, detailing varying water velocities and depths that affect eel passage success rates for different sizes of eels. It outlines the yellow and green routes, highlighting areas with low and high velocities and the impact on eel passage.
CI 50518 NSUIARB IR-12 Attachment 12 Page 265 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) APPENDIX H – ASSESSMENT OF UPSTREAM AND DOWNSTREAM FISH PASSAGE
AI summary This section of the document provides an assessment of upstream and downstream fish passage, which is relevant to the environmental impact of energy infrastructure projects.
CI 50518 NSUIARB IR-12 Attachment 12 Page 266 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) To: Kailey Osborne, BMgmt, EP Environmental Scientist Nova Scotia Power January 31, 2023 Re: Ruth Falls Fish Passage Assessment
AI summary This document is a communication from an environmental scientist at Nova Scotia Power regarding a fish passage assessment at Ruth Falls. The content is redacted, indicating that it contains confidential information.
CI 50518 NSUIARB IR-12 Attachment 12 Page 269 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) backwater on the notch slope, to one that is a combination of plunging and streaming flow. This improves passage for all species. It also intr...
AI summary The text discusses modifications to water flow patterns, changing from backwater on a notch slope to a combination of plunging and streaming flow. This change enhances passage for aquatic species, increases energy dissipation, and reduces turbulence and velocity in pools, creating more resting areas.
CI 50518 NSUIARB IR-12 Attachment 12 Page 276 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Kailey Osborne, Environmental Scientist Nova Scotia Power [[email protected]](mailto:[email protected]) January 31, 2023 Re: C...
AI summary Kailey Osborne from Nova Scotia Power submitted a concept design report regarding the downstream passage of Silver Stage Eels at Ruth Falls Dam on January 31, 2023.
2. Site Visit On May 31, 2022, Thaumas Environmental and Wood Canada Limited (Wood) visited the fish diversion louvers at the entrance to the Ruth Falls power canal in Sheet Harbour, NS. The purpose of the site visit was to determine the c...
AI summary On May 31, 2022, Thaumas Environmental and Wood Canada Limited conducted a site visit to the Ruth Falls power canal in Sheet Harbour, NS, to assess the fish diversion louvers and their impact on American silver eel passage. A second visit was made in October 2022 to evaluate the flow volume and configuration of the louvers, though a planned assessment of louver condition was not completed due to unmet headpond conditions.
CI 50518 NSUIARB IR-12 Attachment 12 Page 280 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Louvers can be very effective at guiding all fish including eels to a bypass if properly designed (Beck 2020) and modeling conducted at the Al...
AI summary The document discusses the effectiveness of louvers in guiding fish, particularly eels, to bypass structures. It references studies by Beck (2020), Allen (2005), and Amaral (2003), highlighting that a 15-degree angle to the flow is more effective than a 45-degree angle. The document also notes that the addition of a barrier along the bottom (overlay) can enhance eel guidance efficiency (FGE) at sites like Ruth Falls.
CI 50518 NSUIARB IR-12 Attachment 12 Page 288 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - 3) The bypass pipe outfall drop to the river and plunge pool as currently operating meets the drop and depth requirements to ensure it is sa...
AI summary The document discusses modifications to a bypass pipe and fish passage system to improve eel and other species' downstream passage. It highlights current compliance with safety standards, the need for future assessments and repairs, and recommendations for monitoring studies to evaluate the effectiveness of the modifications.
CI 50518 NSUIARB IR-12 Attachment 12 Page 304 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan NS Power has considered the potential environmental and ar...
AI summary NS Power has evaluated the environmental and safety risks of lowering the Ruth Falls Headpond for the refurbishment project and determined it to be the safest and most efficient approach, despite considering alternatives like bulkheads and cofferdams which present significant risks.
2.0 Description of Effects on Fish and Fish Habitat The following water management strategies related to the Project have the potential to result in the death of fish by means other than fishing, and/or the harmful alteration, disruption,...
AI summary The text discusses the potential environmental impacts of a project on fish and fish habitat in Nova Scotia, including temporary drawdowns of a reservoir, entrainment and stranding of fish, and the installation of temporary infrastructure that may disrupt fish habitat.
CI 50518 NSUIARB IR-12 Attachment 12 Page 306 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan structures will be placed upon the substrate which will be...
AI summary The Ruth Falls Dam Refurbishment project will temporarily impact fish passage and habitat due to reservoir drawdown and construction activities. NS Power argues that the temporary nature of these impacts and the lack of recent salmon presence will minimize long-term effects on fish populations. Fish ladder improvements are planned to enhance efficiency.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
3.1 BACKGROUND Based on operational experience, the drawdown of the headpond to elevation 91.0 ft is expected to take one to two days, however the drawdown has been extended to eight daysto reduce potential impacts to fish and fish habitat...
AI summary NS Power has extended the drawdown of the headpond to eight days to minimize impacts on fish and fish habitat. The company conducts fish and fish habitat surveys as part of the Hydro Relicensing Program, which occurs every ten years. Data from two surveys, ten years apart, are used to observe trends in fish species in the Sheet Harbour watershed.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
3.3 TRIBUTARY MONITORING During the fish rescue, NS Power will conduct ground truthing to confirm any tributary locations on Ruth Falls Headpond using the results of a desktop exercise identifying tributaries depicted on 1:50,000 mapping....
AI summary NS Power will conduct field assessments of tributaries near Ruth Falls Headpond during and after a drawdown to evaluate connectivity, thermal refuge areas, and other physical characteristics of the tributaries.
3.4 WATER QUALITY The Ruth Falls Headpond is a relatively small, shallow headpond with depths of up to 26.2 ft (8 m) in the deepest parts. Water quality of the headpond is heavily influenced by inflows from the Grant River Watershed as wel...
AI summary The Ruth Falls Headpond has acidic water quality with a pH range of 4.43-4.52 and is classified as meso-eutrophic or eutrophic. NS Power conducts water quality surveys as part of the hydro relicensing program, and a drawdown would expose approximately 1.15 km² of shoreline.
CI 50518 NSUIARB IR-12 Attachment 12 Page 311 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan shallow under normal FSL of 109.25 ft, with depths of less...
AI summary NS Power proposes a monitoring plan for water quality during the Ruth Falls Dam refurbishment, including monthly sampling from July to November to assess parameters such as temperature, dissolved oxygen, and nutrient content. The plan aims to compare these measurements with normal operating conditions and ensure water quality is maintained during the drawdown period.
3.5 TRIBUTARY MONITORING FISH ENTRAINMENT / DOWNSTREAM MONITORING The drawdown of the Ruth Falls Headpond will be conducted gradually to avoid creating excessive flows, which will reduce the risk of entrainment of fish and other species do...
AI summary The drawdown of the Ruth Falls Headpond will be conducted gradually to minimize fish entrainment. NS Power regularly manages stop log bays without known harm to fish species. The monitoring program aims to assess YoY gaspereau abundance before drawdown and monitor fish entrainment during the process.
CI 50518 NSUIARB IR-12 Attachment 12 Page 312 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan drawdown and characterize the aquatic habitat exposed duri...
AI summary The text discusses the monitoring plan for the Ruth Falls Dam refurbishment, focusing on the impact of drawdown on aquatic habitats and fish entrainment. It references a similar study conducted at Tusket Dam and outlines the methods to be used for monitoring fish entrainment and juvenile fish populations.
3.5.1 Study Plan The duration of the drawdown is scheduled to take eight days starting no earlier than July 10th . The planned late start date of the drawdown will provide time for juvenile fish to grow and increase their chance of surviva...
AI summary A study plan outlines an eight-day fish entrainment monitoring period starting no earlier than July 10th, with monitoring beginning a day before and continuing a day after the drawdown to assess juvenile fish survival during downstream migration.
CI 50518 NSUIARB IR-12 Attachment 12 Page 313 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan - Implementing an adaptive approach to sampling frequency...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam refurbishment, focusing on adaptive sampling methods, gear types for capturing different fish species and life stages, and flow rate measurements. NS Power plans to estimate fish entrainment and harm, and proposes an offsetting strategy involving 2700 m2 of habitat restoration to mitigate impacts.
3.6.2 Monitoring Transects Monitoring transects will also be completed once per month to supplement the drone surveys. Two monitoring transect will be selected on Ruth Falls Headpond. The position of the transects will not be selected rand...
AI summary Monitoring transects will be conducted monthly at Ruth Falls Headpond to assess ecological changes during the drawdown. Transects will be placed in areas of high ecological value based on drone surveys. Data from these transects and drone surveys will be used to evaluate the impact of the drawdown on habitat and vegetation.
Table 4: Wetlands Found Within the Littoral Zone of Ruth Falls Headpond. Wetlands 3,5,6,15,17,19 are highlighted as they have been selected for Wetland Monitoring as described below. Wetland ID Number Wetland Type Wetland Description 1 Con...
AI summary Table 4 lists wetlands within the littoral zone of Ruth Falls Headpond, highlighting specific wetlands for monitoring. A 2007 survey identified no rare or endangered species, but a 2023 update found three potentially rare or endangered species near the area, though not within the immediate vicinity of the headpond.
CI 50518 NSUIARB IR-12 Attachment 12 Page 319 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan drawdown activities. See Appendix P – ACCDC report in the...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment under the Fisheries Act, focusing on potential short-term impacts of drawdown activities on wetlands. NS Power acknowledges the uncertainty regarding the extent of these impacts, despite expecting no long-term changes to species composition or hydrology.
3.7.1 Wetland Monitoring While no permanent long-term alterations to the wetlands on Ruth Falls Headpond are anticipated, NS Power proposes to contract a third-party qualified wetland consultant to develop and execute a wetland monitoring...
AI summary NS Power plans to contract a third-party wetland consultant to monitor changes in wetland plant species, soil moisture, water levels, and fish habitat at Ruth Falls Headpond. A similar monitoring plan was approved for the Tusket Main Dam Refurbishment Project, with initial results showing temporary impacts but minimal long-term effects.
CI 50518 NSUIARB IR-12 Attachment 12 Page 321 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan use this plan as a basis for monitoring at Ruth Falls. Ful...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under the Fisheries Act Authorization. It includes baseline, construction, and post-construction monitoring of wetlands, fish habitat assessments, and the use of drone imagery to evaluate temporary impacts on fish habitat.
CI 50518 NSUIARB IR-12 Attachment 12 Page 322 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary This document outlines a monitoring plan related to the Ruth Falls Dam Refurbishment under the Fisheries Act Authorization, specifically addressing Section 35(2)(b). The plan is part of a regulatory proceeding and involves environmental compliance and oversight.
3.8 REPORTING NS Power will provide a report on 2024 drawdown monitoring activities by December 31st, 2025, detailing results of the fish rescue survey and mortality estimates, results and estimates for downstream entrainment and results o...
AI summary NS Power will submit a report by December 31, 2025, detailing 2024 drawdown monitoring activities, including fish rescue surveys, mortality estimates, downstream entrainment, habitat assessments, and water quality surveys as required by NSECC. Wetland monitoring reporting will follow the plan in Appendix M.
4.0 Construction Monitoring NS Power requires that the main civil contractor (or general contractor) develop a site-specific water management and erosion and sedimentation control plan that must align with NS Power's established water mana...
AI summary NS Power requires the main civil contractor to develop a site-specific water management and erosion control plan aligned with its established standards. The plan will be reviewed by NS Power's Project Manager, Engineer, and Environmental Lead. NS Power will also implement a Project Specific Environmental Protection Plan (EPP) with regular inspections to ensure compliance and provide a summary report to DFO by December 31, 2025.
5.2 FISH LADDER NS Power will complete monitoring activities associated with changes to the Ruth Falls Dam after construction is complete, including the improvements made to the fish ladder which includes the adjustment of weir sizing, not...
AI summary NS Power will monitor the effectiveness of fish ladder improvements at Ruth Falls Dam by installing AI cameras and conducting daily visual inspections to assess fish passage. Monitoring will occur between April 1st and June 15th in 2025 and 2026, with additional assessments if fish activity continues beyond this period.
CI 50518 NSUIARB IR-12 Attachment 12 Page 324 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan while the camera at the entrance will be used to quantify...
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment under the Fisheries Act. It includes methods for assessing fish ladder efficiency, tracking fish migration, and implementing contingency measures if fish passage is compromised. NS Power will collaborate with experts and DFO to ensure compliance and improve fish passage.
5.3 LOUVRE SYSTEM Upon completion of the proposed improvements to the louvre system, NS Power is committed to completing a tagging study to assess how the changes impact the downward migration of eels and other migratory pelagic species su...
AI summary NS Power plans to conduct a tagging study in 2025 to assess the impact of proposed louvre system improvements on fish migration. The study will compare results to a 2009/2010 baseline and inform further improvements. If no improvement is found, additional mitigation measures may be required by DFO.
5.4 UPSTREAM EEL RAMP The eel ramp will require monitoring and maintenance to ensure it is operating as designed. Operations will complete weekly checks on the eel ramp to ensure it is free of debris by opening up the locked box surroundin...
AI summary The upstream eel ramp requires weekly maintenance and monitoring to ensure proper function and debris removal. During the 2025 upstream migration season, NS Power will conduct a study comparing elver counts in a trap and fyke net to assess the ramp's effectiveness. Adjustments may be made based on findings.
CI 50518 NSUIARB IR-12 Attachment 12 Page 326 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan It is important to note that during the first year of oper...
AI summary The document discusses the need for potential adjustments to fish passage structures (fishway, louvre system, and eel ramps) during the first year of operation following the Ruth Falls Dam refurbishment to ensure optimal performance.
6.0 Death of Fish/HADD after Avoidance and Mitigation Measures and Standards Table 5 provides a summary of potential impacts to fish and fish habitat including proposed mitigation and potential for death of fish and/or harmful alteration,...
AI summary This section discusses the potential impacts of the Ruth Falls Dam refurbishment on fish and fish habitat, including the proposed mitigation measures and the potential for fish death or harmful alteration, disruption, or destruction of fish habitat (HADD).
Table 5: Residual Harm from Potential Impacts Associated with the Ruth Falls Dam Refurbishment Potential Effect Spatial Extent of Potential Effect Probabil ity of Potenti al Effect Magnitu de of Potential Effect Measures to Mitigate Death...
AI summary Table 5 outlines the residual harm from potential impacts of the Ruth Falls Dam refurbishment, including temporary loss of fish habitat due to lowering the headpond below the minimum operating level. The spatial extent is localized, and mitigation measures are referenced in Section 3.
Ruth Falls Dam Refurbishment S 35(2)(b) Fisheries Act Authorization Monitoring Plan
AI summary The document outlines a monitoring plan for the Ruth Falls Dam Refurbishment project under section 35(2)(b) of the Fisheries Act. It details measures to ensure compliance with environmental regulations and protect fish habitats during the refurbishment process.
Temporary loss of fish habitat due to temporary installation of access roads Localized: area immediately above and below the dam High Low Refer to Section 2 and 3 No residual HADD anticipated Permanent loss of fish habitat in the East Rive...
AI summary The document outlines potential environmental impacts of a construction project on fish and fish habitat, including temporary and permanent habitat loss, fish mortality, and effects from sedimentation and hazardous materials. These impacts are localized around the Ruth Falls Headpond and East River of Sheet Harbour, with some residual effects anticipated.
1.0 INTRODUCTION Stantec Consulting Ltd. (Stantec) has been retained by Nova Scotia Power Inc. (NS Power) to conduct fish entrainment monitoring as part of the Ruth Falls Rebuild Project (the Project). Specifically, Stantec is conducting a...
AI summary Stantec Consulting Ltd. is conducting fish entrainment monitoring for the Ruth Falls Rebuild Project, focusing on gaspereau and other species. Aerovision Canada Inc. is performing aerial drone surveys to assess habitat changes before and after the reservoir drawdown. The document outlines the field plan for the fish entrainment monitoring program.
3.0 FIELD PROGRAM The following section outlines the proposed Fish Entrainment Monitoring Program that will be conducted during the 2024 drawdown of Ruth Falls flowage. The objective of the field program was to assess the abundance of Youn...
AI summary The proposed Fish Entrainment Monitoring Program aims to assess YoY gaspereau abundance before the 2024 Ruth Falls flowage drawdown, monitor fish entrainment during the drawdown, and characterize exposed aquatic habitats. Stantec is involved in the program.
3.1 BASELINE FISH ABUNDANCE SURVEY - RUTH FALLS FLOWAGE Prior to the drawdown a baseline fish abundance survey will be conducted in Ruth Falls Flowage. The baseline survey was developed to obtain a sample of YoY gaspereau to establish dens...
AI summary A baseline fish abundance survey for YoY gaspereau will be conducted in Ruth Falls Flowage prior to a drawdown in early July. The survey will use seines in the littoral zone to capture juvenile fish and collect morphometric data. The approach is based on successful methods used in a previous drawdown monitoring program on the Tusket River in 2021.
3.2.1 YoY Gaspereau Monitoring The location for the entrainment monitoring was selected based on the field assessment conducted in June 2022 and include two locations downstream of the Ruth Falls Dam where the flow is concentrated as shown...
AI summary The entrainment monitoring for YoY Gaspereau is conducted downstream of the Ruth Falls Dam using bongo nets with a 3-mm mesh. The monitoring includes multiple sampling periods per day, and flow data is collected to calculate fish density and abundance estimates.
CI 50518 NSUIARB IR-12 Attachment 12 Page 336 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) RUTH FALLS REBUILD: FISH ENTRAINMENT STUDY – FIELD PLAN Field Program November 12, 2022
AI summary This document outlines the field program for the Ruth Falls Rebuild Fish Entrapment Study conducted on November 12, 2022. It focuses on assessing fish entrainment at the site as part of the project's environmental impact assessment.
3.3 SHORELINE HABITAT CHARACTERIZATION Aerial imagery will be collected within the reservoir at set intervals to allow NS Power to document changes to aquatic habitat. Aerial imagery collection will consist of three surveys conducted durin...
AI summary Aerial imagery will be collected at specific intervals within the Ruth Falls Flowage reservoir to document changes in aquatic habitat. Surveys will be conducted in Early July 2024, August 2024, and November 2024 using a fixed-wing remotely piloted aircraft system operated by Aerovision. The imagery will be used by NS Power to produce geo-referenced orthomosaics and analyze habitat types and extents using GIS.
CI 50518 NSUIARB IR-12 Attachment 12 Page 340 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) RUTH FALLS REBUILD: FISH ENTRAINMENT STUDY – FIELD PLAN Reporting November 12, 2022
AI summary The document outlines a field plan for a fish entrainment study related to the Ruth Falls Rebuild project, reported on November 12, 2022. It focuses on assessing the impact of the project on fish populations and developing strategies to mitigate potential entrainment effects.
Table 1. Wetlands to be monitored at the Ruth Falls Reservoir Wetland ID Wetland Type To be monitored? 1 Treed shore bog 2 Treed shore bog 3 Treed shore bog Yes 4 Shore bog 5 Shore bog Yes 6 Treed shore bog/ floating bog Yes Engineering ●...
AI summary Table 1 lists wetlands to be monitored at the Ruth Falls Reservoir, including their IDs, types, and monitoring status. The table is part of a document related to environmental monitoring and includes contact information for the head office.
CI 50518 NSUIARB IR-12 Attachment 12 Page 346 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Response to DFO Comments, Ruth Falls Reservoir Monitoring Plan May 20, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project #21-7960 wetland...
AI summary Nova Scotia Power Inc. responds to comments from the Department of Fisheries and Oceans regarding the Ruth Falls Reservoir Monitoring Plan, emphasizing the importance of wetland location and water depth in determining their impact on fish and fish habitat.
Table 2: Direct versus Indirect Benefits Direct Benefits Indirect Benefits Notes Open Lake Fish feeding habitat, Surveys in this zone will spawning habitat focus on fish habitat features and associated direct needs Lakeshore (Foreshore) Fe...
AI summary Table 2 outlines direct and indirect benefits of different zones around a lake, focusing on fish habitat and water quality. Surveys will occur between June 1-September 30, but fish habitat may exist outside this period. It requests confirmation that NS Power will use the ordinary high water mark (OHWM) to delineate fish habitat.
CI 50518 NSUIARB IR-12 Attachment 12 Page 348 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) November 18, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. 1223 Lower Water St. Halifax, NS B3J 3S8 Dear Ms. Osborne, Re: Wetland and Wetland...
AI summary This letter from Nova Scotia Power Inc. to Ms. Kailey Osborne is related to the Wetland and Wetland Fish Habitat Monitoring Plan for the Ruth Falls Reservoir in Sheet Harbour, NS. It is part of a regulatory proceeding involving environmental compliance and monitoring.
INTRODUCTION Nova Scotia Power Inc. (NSPI) is planning to temporarily lower the headpond at the Ruth Falls Reservoir (the Reservoir) within the Sheet Harbour Hydroelectric System to accommodate refurbishments (the Project). Strum Consultin...
AI summary Nova Scotia Power Inc. (NSPI) plans to temporarily lower the headpond at the Ruth Falls Reservoir for refurbishments. Strum Consulting was hired to develop a monitoring plan to assess the impact of this change on wetlands and fish habitat.
CI 50518 NSUIARB IR-12 Attachment 12 Page 350 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir November 18, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 2...
AI summary The document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project by Nova Scotia Power Inc. It includes pre-construction and post-construction monitoring phases to evaluate changes in wetland characteristics due to lowered water levels.
Methodology Wetland monitoring will include detailed vegetative, hydrological, and soil monitoring within the six selected wetlands. Each wetland to be monitored was delineated prior to the commencement of monitoring activities to ensure t...
AI summary The methodology for wetland monitoring involves detailed vegetative, hydrological, and soil assessments, including the use of quadrats, monitoring wells, and soil test pits. Vegetative composition, cover, and plant health are assessed, and standardized placement of monitoring elements ensures data consistency. Photographs are taken from fixed GPS locations for future comparison.
Review of Fish Sampling Results A review of fish sampling conducted by NSPI was completed for all data available prior to the commencement of monitoring. The review involved data compilation of fish species and abundance, information relat...
AI summary A review of fish sampling conducted by NSPI was completed for all data available prior to the commencement of monitoring. The review included data compilation on fish species, abundance, migratory periods, and habitat requirements.
CI 50518 NSUIARB IR-12 Attachment 12 Page 354 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir November 18, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 2...
AI summary The document outlines a wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project, submitted by Nova Scotia Power Inc. on November 18, 2022, under project number 21-7960.
CI 50518 NSUIARB IR-12 Attachment 12 Page 360 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland and Wetland Fish Habitat Monitoring Plan, Ruth Falls Reservoir November 18, 2022 Ms. Kailey Osborne Nova Scotia Power Inc. Project # 2...
AI summary A wetland and wetland fish habitat monitoring plan for the Ruth Falls Reservoir project, submitted by Nova Scotia Power Inc. on November 18, 2022, is discussed in this document.
REFERENCES Environmental Services Nova Scotia Power. 2018. Sheet Harbour Hydro System Relicensing Report . Jacques Whitford. 2007. Report – Vegetation Surveys at the Sheet Harbour Hydroelectric System . Project No. 1026751. NSLC Adopt a St...
AI summary The references section lists several documents related to environmental assessments and fish habitat studies, including reports on hydroelectric systems and fish habitat suitability assessments.
CI 50518 NSUIARB IR-12 Attachment 12 Page 380 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 206 network.] with Toporama (http://atlas.nrcan.gc.ca/toporama/en/index.html) [CS, FA, FR, NR, OE, PR, Sens, 207 Persistent (surface...
AI summary The document contains a table discussing wetland outflow characteristics, including persistent, seasonal, and temporary water flows, as well as outflow confinement during major runoff events. It references specific ecological factors and includes skips to other sections for further details.
CI 50518 NSUIARB IR-12 Attachment 12 Page 390 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 5 Investigator Name: Darcy Kavanagh & Angus Doane...
AI summary This document is a field assessment form for the Ruth Falls Wetland 5 conducted on July 4, 2022, by Darcy Kavanagh and Angus Doane. It includes details about the site, investigator, and assessment data, as well as information about the wetland's size and the extent of the assessment conducted.
CI 50518 NSUIARB IR-12 Attachment 12 Page 392 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2 STR= Stressors. 77 5-10 km. 0 78 >10 km. 0 79 OF15 Tidal Proximity The distance from the AA edge to the closest tidal water body (regardless...
AI summary The text outlines a table related to stressors, including tidal proximity and upland edge contact, with specific measurements and considerations for assessing environmental impact. It includes notes on using Google Earth and KMZ files for accurate distance calculations and mentions entities involved in the assessment process.
CI 50518 NSUIARB IR-12 Attachment 12 Page 410 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 6 Investigator Name: Darcy Kavanagh & Angus Doane...
AI summary This document contains a wetland assessment form for the Ruth Falls Wetland 6 site, completed by Darcy Kavanagh and Angus Doane on July 4, 2022. The form includes details about the site, such as its location, size, and the investigator's experience with the WESP-AC assessment method.
Google Earth Pro : https://www.google.com/earth/download/gep/agree.html Provincial Landscape Viewer : https://nsgi.novascotia.ca/plv/ For most wetlands, completing this office data form will require 1-2 hours. For a list of functions to wh...
AI summary The text provides links to tools for wetland evaluation and describes the functions and codes used in the WESP-AC model, including water storage, sediment retention, and habitat for various species.
CI 50518 NSUIARB IR-12 Attachment 12 Page 420 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 177 Zone within Wetland adjoining uplands from open water within the AA is: include wooded riparian areas if they have wetland soil...
AI summary The text describes criteria for identifying wetland zones and flat shoreline extent within a specific area. It outlines measurements for distances from open water, definitions of flat shoreline based on slope, and classifications of emergent vegetation. These metrics are used for ecological assessment and planning.
CI 50518 NSUIARB IR-12 Attachment 12 Page 430 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 15 Investigator Name: Darcy Kavanagh & Angus Doane...
AI summary This document contains a field assessment report for the Ruth Falls Wetland 15 conducted on July 4, 2022, by Darcy Kavanagh and Angus Doane. The assessment includes details such as location, size of the area, and survey coverage. It is part of a larger regulatory proceeding and includes a data form for non-tidal wetlands in Nova Scotia.
CI 50518 NSUIARB IR-12 Attachment 12 Page 440 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E F17 Forb Cover Within parts of the AA having herbaceous cover (excluding SAV), the areal cover of forbs reaches an annual maximum of...
AI summary The text outlines criteria for assessing vegetation cover within specific ecological areas, focusing on forb and sedge cover percentages and the dominance of herbaceous species. These metrics are used to evaluate ecological conditions and habitat characteristics.
CI 50518 NSUIARB IR-12 Attachment 12 Page 450 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Cover Page: Basic Description of Assessment WESP-AC version 2 Site Name: Ruth Falls Wetland 17 Investigator Name: Darcy Kavanagh & Angus Doane...
AI summary This document is a field assessment form for the Ruth Falls Wetland 17 conducted on July 5, 2022, by Darcy Kavanagh and Angus Doane. It includes details about the site location, investigator information, and instructions for completing the WESP-AC version 2 assessment form for Nova Scotia wetlands.
CI 50518 NSUIARB IR-12 Attachment 12 Page 460 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E 132 50-95% of the AA. 0 133 >95% of the AA. True for many fringe wetlands. 1 F26 % of Summertime At mid-day during the warmest time...
AI summary The document contains a table with information on the percentage of Aquatic Assets (AA) shaded and flooded, along with ecological indicators such as FA (Anadromous Fish Habitat), WC (Water Cooling), CS (Carbon Sequestration), and others. The data is used for environmental assessments and includes ecological metrics like shading, flooding, and habitat characteristics.
CI 50518 NSUIARB IR-12 Attachment 12 Page 480 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) A B C D E Erosion from plowed fields, fill, timber harvest, dirt roads, vegetation clearing, fires. Erosion from construction, in-channel mach...
AI summary The text outlines various sources of erosion and sedimentation within a Conservation Area (CA) and provides a framework for assessing their impact on the Area of Assessment (AA). It includes categories of erosion, human-related disturbances, and a scoring system based on the severity and recency of disturbances.
Table 1D. Ruth Falls Reservoir - Wetland Monitoring Results Netland 15 HYDROLOGICAL INDI CATORS Baseline (July 2022) Y/N Baseline (September 2022) Y/N Notes HYDROLOGICAL OBSERVATIONS (POST ALTERATION) Surface water N Y urface saturat Y Y •...
AI summary Table 1D presents wetland monitoring results for the Ruth Falls Reservoir, including hydrological indicators, vegetation plots, and soil type data collected in July and September 2022. The table highlights changes in surface water, vegetation percentages, and other environmental factors.
CI 50518 NSUIARB IR-12 Attachment 12 Page 503 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Wetland Fish Habitat Monitoring Results Project # 21-7960 5-Jul-22 6-Sep-22 Weather Sun Overcast Time 12:15 13:45 Locations Surveyed (OL, LS,...
AI summary This document provides monitoring results for a wetland fish habitat project conducted between July and September 2022. Key findings include water and air temperatures, pH, conductivity, and fish presence observations. The wetland is described as a peninsula with varying substrate types and habitat conditions.
Goal As part of a contract under NSPI the DARFM, along with the NSSA, will develop and implement an offsetting project for approximately 2700m2 (Now placing two large structures instead) on the West River Sheet Harbour watershed. The offse...
AI summary The document outlines a project to develop and implement an offsetting initiative for fish habitat restoration in the West River Sheet Harbour watershed, in collaboration with the DARFM, NSSA, and Millbrook First Nation. The project, spanning eight years, aims to improve fish migration and habitat, including a liming project since 2005 to mitigate acidification effects.
Objective 2: Pre-offset baseline monitoring: - Pre-offset baseline monitoring will include the repetition of Habitat Suitability Index (HSI) assessments described in Year 1 as well as the following: - o Characterization of the thermal prof...
AI summary Pre-offset baseline monitoring includes repeating HSI assessments and characterizing the river's thermal profile through drone surveys and water temperature loggers. Monitoring efforts have been adjusted due to 2023 water conditions and plan changes, incorporating previous data from NSSA and fall 2023 surveys with early 2024 monitoring.
Monitoring strategy and techniques: - Visualization: - o Site pictures taken at each survey site and structure site. - Pictures will be taken with the same orientation and matched with the map(s) established in year 1 - o Will document pre...
AI summary The document outlines a comprehensive monitoring strategy for a river restoration project, including visualization techniques, habitat suitability index assessments, water temperature monitoring, and structure surveys. Methods such as site pictures, transect measurements, and drone usage are detailed to evaluate the project's environmental impact and effectiveness.
CI 50518 NSUIARB IR-12 Attachment 12 Page 547 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov A Myotis lucifugus Little...
AI summary The document lists several endangered species in Nova Scotia, including bats, turtles, salmon, and birds, with details on their conservation status, rarity rankings, and distances. The table includes information on their scientific and common names, as well as legal protections under provincial and federal regulations.
Data Report 7716: Ruth Falls Watershed, NS Page 12 of 22 Taxonomic Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov N Parmeliopsis ambigua Green Starburst Lichen S2S3 5 50.7 ± 0.0 NS...
AI summary The document presents a table listing various species of lichens and mosses found in the Ruth Falls Watershed in Nova Scotia, including their scientific names, common names, conservation status, and distances from the watershed.
Page 14 of 22 Group P Scientific Name Persicaria careyi Common Name Carey's Smartweed COSEWIC SARA Prov Legal Prot Prov Rarity Rank S1 # recs Distance (km) 62.6 ± 3.0 Prov NS P Parlin's Pussytoes S2 2 87.9 ± 0.0 NS • Antennaria parlinii ss...
AI summary This table lists various plant species in Nova Scotia with their scientific and common names, conservation status, number of records, distance measurements, and provincial legal protection status. It includes species such as Carey's Smartweed, Parlin's Pussytoes, Cut-Leaved Coneflower, and others, with details on their rarity and distribution.
Page 15 of 22 Group Scientific Name Common Name COSEWIC SARA Prov Legal Prot Prov Rarity Rank # recs Distance (km) Prov ı P Primula mistassinica Mistassini Primrose S2S3 17 49.3 ± 1.0 NS Р Anemone quinquefolia Wood Anemone S2S3 21 46.0 ± 0...
AI summary The table lists various plant species in Nova Scotia with their conservation status, rarity rankings, and distances. It includes scientific and common names, along with data on the number of records and distances measured in kilometers. The table appears to be related to biodiversity and conservation efforts.
Page 17 of 22 Group ⊃ Scientific Name Carex tribuloides Common Name Blunt Broom Sedge COSEWIC SARA Prov Legal Prot Prov Rarity Rank S3 # recs Distance (km) 48.5 ± 5.0 Prov NS Persicaria amphibia var. emersa Long-root Smartweed S3? 2 $70.4...
AI summary This page lists various plant species along with their conservation status, rarity rankings, and distances in Nova Scotia. The data includes scientific and common names, COSEWIC designations, and provincial legal protections.
Data Report 7716: Ruth Falls Watershed, NS Page 19 of 22 # recs CITATION 139 Klymko, J. 2018. Maritimes Butterfly Atlas database. Atlantic Canada Conservation Data Centre. 135 Neily, T.H. & Pepper, C. 2020. Nova Scotia SMP lichen surveys 2...
AI summary This document presents a list of citations and records related to biodiversity and species data in the Ruth Falls Watershed, Nova Scotia. It includes data on butterflies, lichens, vascular plants, bats, wood turtles, and breeding birds, collected by various organizations and researchers.
1.0 Introduction The Sheet Harbour Hydro System is located on the East River in Halifax County, with the easternmost extents of the drainage area extending into Guysborough County. The hydro system has a drainage area of 573.9 km2. Present...
AI summary The Sheet Harbour Hydro System includes six reservoirs and several fish passage structures, including fishways and a trap and truck program for Atlantic salmon. NS Power conducted studies in 2009 and 2010 to assess fish passage effectiveness, particularly for salmon smolts and American eels. DFO requested improvements to fish passage at Ruth Falls as part of the relicensing process.
CI 50518 NSUIARB IR-12 Attachment 12 Page 569 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - NSP tagged 148 eels, released them upstream the below Malay Falls dam, and detected 40 travelling through the bypass representing 30% effici...
AI summary The document discusses a study on fish passage at a dam in Nova Scotia, focusing on the migration of American eels and other species. NSP tagged and released eels, detecting a 30% efficiency in their movement through a bypass. The study also identified other species and outlines recommended modifications to the louver diversion system and fish ladder to improve passage.
CI 50518 NSUIARB IR-12 Attachment 12 Page 570 of 576 REDACTED (CONFIDENTIAL INFORMATION REMOVED) NS Power is committed to implementing the proposed upgrades to the fish ladder and diversion system. This document provides an overview of the...
AI summary NS Power is committed to upgrading the fish ladder and diversion system at Ruth Falls. The proposed study and monitoring program will assess the effectiveness of the modified louvre system in diverting migratory species. Construction is expected to start in July 2024, with postconstruction studies to be conducted after completion.
2.1 Species of interest The data collected by NS Power over the past 20 years indicates that three migratory species are present in the watershed: alewife, Atlantic salmon, and American eels. However, the number of salmon present is extrem...
AI summary NS Power has identified three migratory species in the watershed: alewife, Atlantic salmon, and American eels. Due to very low salmon numbers, studies will focus on alewife and American eels, with sea-run trout added at DFO's request. Resident trout will be used to assess bypass efficiency, though their low numbers may affect study reliability.
Study Design - Juvenile Alewife Assessing juvenille alewife downward migration will be completed using a minimally invasive approach in an effort to reduce the mortality associated with handling young alewife. All methods pose a risk of ha...
AI summary NS Power plans to assess the efficacy of a bypass for juvenile alewife using a minimally invasive method in early September. A bongo net will be used upstream and downstream of the louvre system, and an overhead camera will assist in counting. Fish will be released after counting, but variability in counts is expected due to the schooling behavior of juvenile alewife.
2.4 Data analysis and reporting Depending on the environmental conditions, hydrophones will be recovered at least four weeks after the final fish release to ensure that all tagged fish have completed their downstream movement past the Ruth...
AI summary This section outlines the data analysis and reporting process for a fish migration study. Hydrophones will be recovered after four weeks to analyze acoustic data from tagged fish. The study will assess fish movement through a bypass and louver system, and NS Power will provide a report to DFO by May 1, 2026.
Offsetting: - DFO and the Mi'kmaw have communicated that the amount of offsetting proposed for the project is too low, and are requesting additional offsetting for the harmful alteration, disruption and destruction of fish habitat and the...
AI summary DFO and the Mi'kmaw have raised concerns about the adequacy of the offsetting plan proposed by NS Power for the project, citing insufficient compensation for fish habitat damage and fish mortality. DFO has requested additional offsetting and suggested reallocating funds from ineffective monitoring to increase offsetting. NS Power is to revise the plan and submit it for DFO consultation.
Ruth Falls Dam Refurbishment project (phase 2): - Concern with the removal of approximately 6.35 million m3 of water over 9 months: - Significant exposure time and removal of habitat is sure to permanently destroy more of the habitat than...
AI summary The Ruth Falls Dam Refurbishment project (phase 2) raises concerns about the environmental impact of removing 6.35 million m3 of water over 9 months, the adequacy of habitat offsetting measures, and the need for security and navigability of the river during construction. Requests include increasing offsetting to 5%, confirming security measures, and ensuring access for hunters and fishers.