N-3NSPI (CA) RIR-1 to 18 - Redacted
3 passages
CI 50518 CA IR-5 Attachment 5 Page 7 of 160 REDACTED (CONFIDENTIAL INFORMATION REMOVED) June 22, 2020 Grant Brown awareness and understanding of the Project scope, objectives, and timelines and addressing public areas of interest and poten...
AI summary Nova Scotia Power's Environmental Scientist, Nadine Thomas, provides additional information regarding a project's scope, objectives, timelines, and public concerns as of June 22, 2020.
CI 50518 CA IR-5 Attachment 19 Page 194 of 423 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3 # Indicators Condition Choices Data Definitions/Explanations Protection and off road vehicles appear to effectively exclude or divert visitors and...
AI summary The document discusses environmental protection indicators, focusing on wildlife disturbance prevention and consumptive uses within a protected area. It includes data on proximity of domestic wells to the area and the absence of certain consumptive activities.
Table 3: Swimming Speeds by Time for 200 mm long Trout in m/sec (Katopodis & Gervais, Ecohydraulic analysis of fish fatigue data, 2012; Di Rocco, 2020) Percent passage Sprint speed 5 seconds Burst speed 20 seconds Prolonged speed 200 secon...
AI summary Table 3 presents swimming speeds for 200 mm long trout at various passage percentages and time intervals, including sprint, burst, and prolonged speeds. The data is sourced from studies by Katopodis & Gervais (2012) and Di Rocco (2020). The table includes metrics such as UCRIT and EPOC, which are relevant to fish fatigue analysis.
N-6NSPI (NSUARB) RIR-1 to 13 - Redacted
7 passages
6.1 Regular Operations Inflows into the Ruth falls reservoir are controlled by NS Power Hydro Operations. Water levels can fluctuate between the full supply level of 33.7 m (110.5'), minimum supply level of 33.3 m (109.25'), and the low su...
AI summary NS Power manages the Ruth Falls reservoir's inflows and water levels, maintaining specific flows for fish passage and operational needs. Refurbishments will include changes to the bypass pipe and the installation of an eel ramp, requiring additional maintenance flows to support fish migration.
3.1 2010 Study Results The October 2010 study was designed to assess successful outmigration of American eel. The details and results of the 2010 study including receiver and release locations are described below: American eels were captur...
AI summary The October 2010 study assessed the outmigration of American eel. Eels were captured, measured, and tagged with pit and acoustic tags. Six receivers were deployed at various locations to track their movement as they migrated back down the watershed.
4.0 CONCLUSION Upon review of both the 2009 and 2010 studies, NSP has made certain assumptions: - Both studies with very different techniques have similar efficiency estimates for the louvres approximately 30%. - Based on2009 study, the lo...
AI summary NSP reviewed studies from 2009 and 2010, noting that the louvre and bypass system is approximately 30% efficient for pelagic species but ineffective for eels. The system is old and damaged, requiring improvements to enhance efficiency for eels and other bottom-dwelling fish.
5. Conclusions - 1) The young eels cannot effectively use the pool and weir fishway and require an eel pass to facilitate passage. - 2) A modern eel pass will be used at Ruth Falls, following the alignment shown in Figures 1 and 2. - 3) Th...
AI summary The document concludes that a modern eel pass is required at Ruth Falls to assist young eels in passing through the fishway. The design will follow USFW 2019 guidelines and include specific tiles for eels of certain sizes.
2.2 Upstream migration monitoring It is worth noting here that up to 15 sets of falls are located upstream on the East River between the Hydro generating station tailrace and the Ruth Falls dam. These natural outcroppings of bedrock repres...
AI summary Upstream migration monitoring notes that 15 sets of falls on the East River between the Hydro generating station tailrace and the Ruth Falls dam create partial barriers to alewife passage, particularly during high flow periods.
4.0 CONCLUSION Upon review of both the 2009 and 2010 studies, NSP has made certainassumptions: - Both studies with very different techniques have similar efficiency estimates for the louvres approximately 30% when assessing American eel. -...
AI summary NSP reviewed 2009 and 2010 studies on louvre and bypass systems, noting similar efficiency estimates for louvres at around 30% for American eel. The system is effective for pelagic species but may not work well for eels. NSP acknowledges the system is old, damaged, and may require improvements to guide eels toward the bypass pipe.
• 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 text describes a visualization plan for a project involving monitoring sites and structure placements, along with pre-monitoring habitat suitability index (HSI) assessments. Activities include mapping, site photography, and assessments of fish presence, channel measurements, substrate composition, and riparian characteristics.