N-1Application - CI C0067183 - TUC Wharf Access Bridge Replacement - Redacted
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Why do this project now? Visual Inspection and Non-Destructive Examination (NDE) using Ultrasonic Testing (UT) thickness measurements, which were conducted in 2024, showed deterioration in the condition of both the connections and the stee...
AI summary Ultrasonic testing in 2024 revealed deterioration in the wharf platform's structural elements, requiring replacement by 2025. The wharf's capacity has been reduced to six people at a time, and replacement is needed before the next heavy fuel oil delivery in early 2026 to avoid impacting fuel supply to thermal generation sites.
Why do this project this way? Two preliminary design alternatives were developed to replace the existing wharf access bridge structure, with both designs retaining the substructure, including the piles and pile caps (please refer to Partia...
AI summary Two preliminary design alternatives for replacing the existing wharf access bridge structure were evaluated. Both retain the substructure and accommodate NS Power's telehandler. A steel structure with a timber deck was selected as the more economical option that meets load requirements for offloading operations.
Document No: XXX-XX-XXXX-XXXX Project Cost Estimate Input Checklist and Maturity Matrix Process Industries Required fields: Estimate Classification Project Name: TUC Wharf Access Bridge Replacement Started or Preliminary Class 5 Class 4 Cl...
AI summary The document outlines a Project Cost Estimate Input Checklist and Maturity Matrix for the TUC Wharf Access Bridge Replacement. It includes sections on project scope, location, requirements, technology selection, and strategy, with maturity levels for each category.
Background NSPI previously engaged Stantec to complete an inspection and evaluation of the structure and Stantec produced a report stating that due to excessive deterioration of the stringers and floor beams the structure requires signific...
AI summary NSPI engaged Stantec to evaluate a structure, which found significant deterioration requiring rehabilitation. NSPI considered rehabilitating or replacing the structure but concluded it would be unlikely to complete the work before the end of the year.
Inspection Harbourside completed an inspection of the wharf structure during two visits on June 24, 2024, and July 5, 2024. Access for the provided a boat to access and inspect the underside of the existing superstructure. The stringers we...
AI summary An inspection of the wharf structure was conducted in June and July 2024, revealing poor conditions in some components. The stringers were not surveyed due to prior reports, while floor beams showed deterioration. Cracking and spalling were observed in the substructure. A sub-sea inspection was also completed, with results detailed in Appendix A.
Evaluation Methodology if NSPI is able to use the wharf for this of fuel in the fall, was to confirm the capacity of the existing structure. To do this, an S-Frame model of the superstructure was developed, and the results confirmed by han...
AI summary The evaluation methodology involves confirming the capacity of an existing structure through an S-Frame model and hand calculations, with modifications based on inspection findings. The analysis follows CSA S6-19, Section 14 (Evaluation), and dead loads are calculated and summarized in Table 1.
REDACTED CI C0067183 Attachment 1 Page 4 of 80 REDACTED (CONFIDENTIAL INFORMATION REMOVED) File No: 241188 pipe that runs along the structure near the North side. The telehandler was assumed to be carrying 80% of its maximum load which is...
AI summary The document discusses structural concerns related to a telehandler operating on a structure with deteriorated stringers. Harbourside proposed a jump bridge system to support the telehandler, adding an additional dead load of 279 kN, resulting in an overall dead load of 1024 kN.
Stringers The stringers were found to be severely deteriorated. Typical stringers were assumed to have a 50% reduced section which was in line with findings in the Stantec inspection report. The locations of the worst section loss on the s...
AI summary The document discusses the severe deterioration of stringers, noting a 50% reduction in section properties based on findings from the Stantec inspection report. It references figures showing section loss in specific stringers and outlines calculations comparing bending capacities with load combinations.
REDACTED CI C0067183 Attachment 1 Page 12 of 80 REDACTED (CONFIDENTIAL INFORMATION REMOVED) File No: 241188 reinforcing bars where there has been significant deterioration and epoxy crack injection to extend the life of the existing struct...
AI summary The document discusses the need to replace the existing wharf superstructure due to significant deterioration, the potential installation of cathodic protection, and the opportunity to address sea level rise considerations. The replacement would also facilitate the rehabilitation of the shoreline with a rock revetment and improve access for construction.
Conclusion Harbourside has completed an inspection and evaluation of the Tufts Cove Wharf structure to determine its current capacity and develop alternatives for the offloading operations. Based on the current condition of the wharf, no r...
AI summary Harbourside Engineering has evaluated the Tufts Cove Wharf and concluded that no repairs are needed for this year's offloading operations if conducted using Option 2 with a 6-person limit and without a telehandler. They also recommend replacing the wharf superstructure after the 2025 offload, considering sea level rise and using a steel and timber structure for cost-effectiveness.
SITE VISIT RECORD Date: 2024-Sep-19 File No.: 241188 To: Connor Lebans. P.Eng. From: Tim Matthews, P.Eng. Mechanical Engineer Address: Tufts Cove Subject: Tufts Cove Wharf - Record of Site Inspection Harbourside Engineering Consultants (Ha...
AI summary Nova Scotia Power Inc. (NSPI) commissioned Harbourside Engineering Consultants to inspect the Tufts Cove Wharf to evaluate its structural capacity and determine if modifications are needed for offloading operations. The wharf's structure includes spans supported by concrete pile caps and consists of various girders, beams, and a timber deck.
Inspection - Substructure Above Water Line Photo 15: Photo showing the condition of Shore-side Cell. As can be seen in the photo above, there is marine growth over the wetted area of the steel sheet pile wall. There are no signs of coating...
AI summary The document presents photos and descriptions of structural inspections at a marine facility, highlighting issues such as marine growth, corrosion, delamination, cracking, and spalling of concrete. These findings indicate significant deterioration of the steel sheet pile walls, pile caps, and manifold cell structures.
REDACTED CI C0067183 Attachment 1 Page 41 of 80 REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI C0067183 Attachment 1 Page 44 of 80 File No: 241188 APPENDIX C - Stantec Inspection Report REDACTED CI C0067183 Attachment 1 Page 45 of...
AI summary This document is an attachment from a regulatory proceeding, containing a redacted inspection report by Stantec Consulting Ltd. for Nova Scotia Power Inc. regarding the condition assessment of an access bridge at Tufts Cove. The report is part of a larger filing and includes correspondence addressed to Connor Lebans.
4.0 OBSERVATIONS The overall dimension of the access bridge and member sizes were measured where accessible and were observed to be in general conformance with the information included in the drawings received. A summary of the member size...
AI summary The access bridge and member sizes were generally in conformance with the drawings provided by NSPI. However, some member sizes indicated in the drawings are no longer available from Canadian mills, and the general layout of bracing, bearing plates, and anchorage details were missing from the drawings.
\ W12x27 is no longer available. Metric Designation and Imperial Designation refer to closest section size selected based on the measurements taken on site. REDACTED CI C0067183 Attachment 1 Page 47 of 80 May 31, 2024 Connor Lebans Page 3...
AI summary The condition assessment of the steel structure of the access bridge TUC in Nova Scotia reveals significant corrosion on girders and beams. While girders are in fair condition with localized thickness loss, beams are in poor condition with advanced corrosion and failed bolted connections, requiring replacement.
beams were also in poor condition. Full material loss of the bolts was observed at most of these connections. Based on the condition observed on the beams, it is recommended to replace these members. The joists were observed to be in poor...
AI summary The structural assessment of the access bridge identified severe corrosion and material loss in beams, joists, and bracing elements, recommending full replacement due to safety concerns. Access to the platform is restricted until remediation is completed.
Table 2 - Summary of Observations Location/ Label Observation/Condition Recommended Measures Priority Span A North Girder Localized reduction in section due to corrosion. Connections welds show signs of corrosion. Coating failure observed...
AI summary The document outlines observations and recommended measures for various structural components (girders, beams, joists, etc.) due to corrosion. Measures include surface cleaning, re-coating, and full replacement depending on the severity of the corrosion observed.
Condition Assessment of Access Bridge TUC, Nova Scotia Location/ Label Observation/Condition Recommended Measures Priority Joists Severe corrosion in web and flanges. Full section loss on multiple joists. Severe corrosion of connections to...
AI summary The condition assessment of the Access Bridge TUC in Nova Scotia reveals severe corrosion in multiple structural components, including joists, bracing members, and beams, necessitating full replacement. Minor corrosion is noted in some girders, requiring surface cleaning and monitoring.
8.0 CONCLUSION The condition assessment and UT measurements show severe deterioration in the condition of the connections and the steel structural elements of the platform. Further investigation to examine the condition of the foundations...
AI summary The condition assessment and ultrasonic testing reveal severe deterioration in the platform's structural elements. Recommendations include further investigation, replacement of structural components, surface cleaning, and restricted access until repairs are completed.
REDACTED CI C0067183 Attachment 1 Page 57 of 80 REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI C0067183 Attachment 1 Page 58 of 80 May 31, 2024 Connor Lebans Reference: Condition Assessment of Access Bridge TUC, Nova Scotia Photo...
AI summary This document contains a series of photographs from a condition assessment of an access bridge in Nova Scotia, highlighting significant corrosion damage on various structural components, including girders, joists, and braces, as well as coating failures and section loss.
REDACTED CI C0067183 Attachment 1 Page 64 of 80 REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI C0067183 Attachment 1 Page 65 of 80 May 31, 2024 Connor Lebans Reference: Condition Assessment of Access Bridge TUC, Nova Scotia Photo...
AI summary The document contains a condition assessment report for an access bridge in Nova Scotia, dated May 31, 2024, authored by Connor Lebans. It includes photos showing structural issues such as differences in connections, coating failure, corrosion at welds, and the condition of bearing plates and anchorage.
Marine Terminal - Focal Points - 1. Middle Dock Cell Cope Wall Deterioration/Loss of Concrete/Exposed Rebar - 2. Middle Dock Cell Steel Sheet Pile Deterioration/Contact Damage/NDT Testing - 3. Shoreline SSP Cell Steel Sheet Pile Deteriorat...
AI summary The document outlines five focal points related to the deterioration and damage of structures at a marine terminal, including concrete loss, exposed rebar, and steel sheet pile issues, along with the need for non-destructive testing (NDT).
Middle Dock Cell (Steel Sheet Pile) The Middle Dock Cell inspection consisted of a Visual Inspection of the Concrete Cope Wall, a Visual Inspection of the Steel Sheet Pile, and Ultrasonic Testing of the Steel Sheet Pile.
AI summary The inspection of the Middle Dock Cell involved visual inspections of the concrete cope wall and steel sheet pile, as well as ultrasonic testing of the steel sheet pile.
Shoreline Cell (Steel Sheet Pile) The Shoreline Dock Cell inspection consisted of a Visual Inspection of the Steel Sheet Pile, and Ultrasonic Testing of the Steel Sheet Pile. REDACTED CI C0067183 Attachment 1 Page 75 of 80
AI summary The inspection of the Shoreline Dock Cell involved a visual inspection and ultrasonic testing of the steel sheet pile, as outlined in the document.
The Four (4) Steel Approach way Piles were found to have 100% Soft Marine Growth Coverage throughout the entirety of the Pile. Piles are Denoted as NW, NE, SW, and SE. The Diver inspected Both the Concrete Pile Jackets in the Tidal Zone, a...
AI summary The inspection of four steel piles revealed 100% soft marine growth coverage. Visual inspections, ultrasonic thickness readings, and their locations were documented in tables. The piles are labeled NW, NE, SW, and SE, and the inspection included both concrete pile jackets in the tidal zone and exposed pipe piles.
Proposal Date: 2025-Feb-7 File No.: 241188 To: Connor Lebans, P.Eng. From: Thomas McNutt P.Eng. Address: Tufts Cove Power Generating Station Subject: Tufts Cove Wharf Bridge Rehabilitation Proposal Harbourside Engineering Consultants (Harb...
AI summary Nova Scotia Power Inc. (NSPI) requires the rehabilitation of the Tufts Cove Wharf Bridge, a critical structure for fuel offloading. The existing steel superstructure is deteriorated and cannot support required loads, restricting access and impacting NSPI operations. Harbourside Engineering Consultants propose detailed design services for the rehabilitation.