Winfield Major Rehab - Project Overview for Industry Day.pptx
PPTX presentation 10 MB Posted
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- Winfield Locks and Dam Major Rehab Industry Day
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- W91237-27-SN-0001
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This is a project overview presentation for the Winfield Locks and Dam Major Rehabilitation project located on the Kanawha River (Mile 31.1) in Winfield, West Virginia, managed by the U.S. Army Corps of Engineers Huntington District. The project addresses critical reliability deficiencies across six major features to extend the facility's operational life by 50 years. The primary scope includes replacement of five standard roller gates and one flap gate, dam roller gate hoist machinery modernization, electrical service distribution and SCADA controls overhaul, replacement of tainter gate anchorages due to active Stress Corrosion Cracking, main lock miter gate anchorage replacement, and main lock emergency gate machinery rehabilitation including wire rope and sheave nest replacements.
The project involves significant technical and operational complexities requiring careful phasing and coordination. Key challenges include minimizing navigation downtime through coordinated gate outages, heavy marine lifting operations within constrained footprints of historic pier houses, tight-tolerance alignment for modernized electro-mechanical systems, and a phased electrical cut-over plan to maintain emergency operational power throughout construction. Critical coordination is required with American Electric Power (AEP), which operates a co-located hydroelectric plant under FERC jurisdiction and provides primary 480V electrical feeds to the dam. Construction impacts to AEP's generation capacity and headwater pool management represent major schedule and liability risks. An Industry Day is scheduled for November 2, 2026, at the Eleanor Armed Forces Reserve Center in Eleanor, West Virginia, with the Project Delivery Team preparing a questionnaire, 30% design drawings, and additional documentation anticipated to be posted on SAM.gov on or about October 13, 2026. Both prime contractors and subcontractors are being sought for this project.
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Other files
| File | Type | Posted |
|---|---|---|
| Special_Notice_Update__Industry_Day_Itinerary_-_Winfield_Locks_and_Dam.docx | DOCX document | |
| Industry Day Drawing Set.pdf | ||
| Winfield Major Rehab Industry Day Questions.pdf | ||
| SAVE THE DATE.docx | DOCX document |
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Text version
Winfield Locks & Dam Major Rehabilitation
Winfield Lock and Dam Background Project: Winfield Locks and Dam Major Rehabilitation Project
Location: Kanawha River (Mile 31.1), Winfield, WV — Huntington District (LRH / LRD)
Project Introduction & Core Features
Project Purpose: Address critical reliability deficiencies across six major features to extend facility life by 50 years.
Major Rehab Scope:
5 Standard Roller Gates & 1 Flap Gate (Gate 6) & Service Bridge Replacement.
Dam Hoist Machinery Dam Electrical Service Distribution & SCADA Controls Overhaul Tainter Gate Anchorage Replacements Main Lock Miter Gate Anchorage Replacements Main Lock Emergency Gate Machinery
Main Lock Miter Gate Anchorages Standardized Repair: Replacing land wall and river wall anchorages.
Leveraging Precedent: Design utilizes the successful design from the 2018 upstream repair contract.
Operational Impact: Requires significant coordination with the Tainter Gate repairs to minimize total navigation downtime.
Main Lock Emergency Gate Machinery Targeted Rehab: Replacement of heavily worn wire ropes and delaminating sheave nests.
Operational Readiness: Restores the facility's ability to safely execute emergency closures during extreme high-water events.
Sequencing: Can be executed concurrently with main lock outages.
Tainter Gate Anchorage Repair Sequencing: Separable feature constructability-wise but impacts navigation through Main Chamber.
Critical Safety Need: Full replacement of the post-tensioned anchorage system due to active Stress Corrosion Cracking (SCC).
Navigation Impact: Requires a massive downstream floating crane; gate outage impacts outdraft mitigation for commercial tows.
Failed Tainter Gate Anchor’s
Dam Roller Gates & Service Bridge Scale: Complete replacement of five 119-foot standard roller gates and one flap gate.
Sequencing: Requires span-by-span demolition and replacement of the 1930s service bridge.
Phasing Constraint: River flow limits dictate how many gates can be bulkheaded and out of service simultaneously.
Roller Gate Machinery Complete Modernization: Replacing failing 1930s-era electro-mechanical drive systems for all roller gates.
Precision Constructability: Requires tight-tolerance alignment and complex rigging within the constrained footprint of the existing historic pier houses.
Heavy Marine Lifting: Demands significant crane capacity and careful staging to extract massive legacy components and install the new hoist assemblies.
Electrical Distribution & SCADA Controls
Primary Utility Corridor: The new service bridge will serve as the critical artery for routing new primary power feeders across the dam.
SCADA Integration: Transitioning from obsolete, fragmented relays to a fully centralized, modern PLC network.
Commissioning Risk: Requires a highly coordinated, phased cut-over plan to ensure the dam maintains emergency operational power throughout construction.
Critical Coordination: AEP Hydropower Interface Jurisdictional & Operational Coordination:
Shared Infrastructure: The dam is co-located with hydroelectric plant owned by American Electric Power (AEP) under FERC jurisdiction.
River Flow Constraints: Taking dam gates out of service for construction directly impacts AEP’s generation capacity and headwater pool management.
Power Reliance: The dam relies on the AEP plant for its primary 480V electrical feed. All new electrical designs must synchronize with AEP's existing switchgear.
Construction Phase Impacts:
Temporary Power Routing: Demolishing the dam's service bridge severs the primary power feeds.
AEP Property Utilization: The 30% design places the temporary mobile generator and Manual Transfer Switch (MTS) directly on AEP property to maintain emergency operations.
Hydropower coordination is not a physical construction feature, but it is a major schedule and liability risk that will heavily influence the contractor's phasing plan.
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