SAM #W912EF26RSN15

Industry Day and Market Research for Dworshak Dam Powerhouse Unit 4 Expansion

The US Army Corps of Engineers, Walla Walla District, is seeking industry input for a major hydroelectric expansion at Dworshak Dam in Idaho. - Project involves design and construction of a powerhouse extension and installation of a new 300MW hydroelectric turbine-generator (Main Unit 4) - Includes site development, powerhouse substructure, auxiliary mechanical/electrical systems, and integration with existing operations - Procurement will be a single, firm fixed-price design-build contract - Government will provide the GSU transformer and intake gate/cylinder - Key requirements: - Minimize disruption to ongoing dam operations - Work within a constrained site with limited access - Implement environmental controls for in-water work - Coordinate with other contractors on site - Industry Day and market research are being conducted to gather feedback on: - Design-build strategies - Risk mitigation approaches - Use of Project Labor Agreements (PLA) - No specific OEMs or part numbers are listed, but turbine-generator manufacturers are a focus - Estimated on-site construction start: June 2028; contract duration to be determined - Place of performance: Dworshak Dam, Ahsahka, Idaho - Contracting office: USACE Walla Walla District, Washington

Description

Walla Walla District Dworshak Unit 4 Industry Day One-on-One Sessions Announcement Registration and General Information W912EF26RSN15 USACE Walla Walla District is developing multiple acquisitions to expand the generation capability of the Dworshak Dam Powerhouse by installing a fourth generating unit (Main Unit 4) and associated powerhouse structure extension. Dworshak Dam is located on the Clearwater River in Ahsahka, ID, approximately 50 miles east of Lewiston, ID. Additional scope of work can be found on the following pages along with a list of questions and desired information the Government would like to learn about your company regarding this project. This information is intended to provide you awareness of what the Government would like to learn. However, you are encouraged to share more information if you believe it will help the Government in developing the solicitation packages. The multi-functional team within the Walla Walla District and Hydroelectric Design Center will be conducting one-on-one sessions May 4-5, 2026, and May 11, 2026, to share information on the government’s requirements and preliminary acquisition strategy, as well as to obtain industry feedback. One-on-one sessions will be conducted virtually. Each company will be allotted one (1) hour for the session. Please limit the number of company representatives to no more than three (3) attendees to facilitate effective dialogue. The purpose is to answer questions and gather specific feedback from your company’s representative. Marketing/capability briefings are not authorized during these sessions. For planning purposes, please provide the following information if interested in participating: Name of Company Name of each attendee, contact number, and email addresses Please send the above information to jani.c.long@usace.army.mil and Leanne.r.walling@usace.army.mil by April 28, 2026. Include the title, “Company Name – Industry Day Attendees,” in the email subject. You will be notified of your scheduled session within two (2) days of receipt. If you have questions to submit in advance, send them to the above emails by April 28, 2026. Mark proprietary questions clearly. Note: Project Labor Agreement (PLA) questions must be submitted by the notice closing date (April 28, 2026). See submission requirements at the end of this notice. Summary of Scope of Work: The Government plans to execute this work through a single, firm fixed-price procurement with the following scope: Powerhouse Building Extension and Site Development – Design and construction of site preparation, powerhouse substructure, and erection of the building envelope for the extension. Turbine-Generator – Design, supply, installation, and commissioning of a hydroelectric generator approximately 300MW. Balance of Plant – Design and construction of auxiliary mechanical and electrical systems supporting power generation and operations. Contractor Access and Work Hour Limitations: The office building will remain occupied during the project. Normal US Army Corps hours are 6:00 am to 6:00 pm, Monday through Friday. Construction activities will be limited to specific areas. On-site construction is estimated to begin in June 2028. Existing Conditions, Constraints & Challenges The project involves extending the existing powerhouse configuration for Main Unit 4. Operations of the existing powerhouse will continue during construction, with minimal disruption. Power generation outages will be limited to scheduled periods; additional outages for construction require coordination and approval. The site has limited space for operations and staging; remote sites may be necessary for parking and storage. Construction of temporary in-water structures and site development may be considered to reduce costs and schedule impacts. An unmaintained roadbed along the east bank of the North Fork Clearwater River may provide additional access. Transportation routes for large equipment may be limited by infrastructure capacity. Work will occur near or in water; environmental controls are critical. Coordination with other prime contractors on-site will be necessary. General Questions Recommendations for successful implementation of a Design-Build contract? Primary risks affecting cost and pricing in a design-build environment? How can the government mitigate these risks? Strategies to minimize costs related to prime contractor markup on turbine-generator manufacturer pricing? Focus areas to reduce proposal pricing risks? Existing relationships or experience with firms suited for the full scope? Impact of a Defense Priorities Allocation System (DPAS) rating on your participation? Estimated duration from award to turbine-generator commissioning, assuming schedule constraints are manageable? Maximum onsite workforce estimate and how it may change over the project? Long-lead items to track, besides the turbine-generator and GSU transformer? Additional long-lead items to be furnished by the government to accelerate schedule or reduce risks? Contracting considerations to maximize participation (e.g., NAICS codes)? Proposal time requested for Phase 2? Likelihood of participation if a stipend is offered for Phase 2 proposals? Preference for providing the Revit model of the existing facility? Other documentation needed? Recommendation for an industry review of the solicitation before RFP issuance? Design Process Questions: How would you structure the post-award design and review process to enable fast-tracking? Experience in establishing clear scope from draft specifications, especially when specs are editable? Powerhouse Extension and Site Work Questions: Would developing unused skeleton bays benefit cost or schedule? Major temporary features needed for construction support? Activities requiring significant line outages and their durations? Preferred methods for delivering materials into the constrained site?                   SEE ATTACHMENT A Turbine - Generator Questions: Are certain design submittals needed earlier to start site construction? Experience with fabricating ~200-inch Francis turbine runners and 300 MW generators? How to integrate designs? Techniques to optimize turbine and generator costs? Feasibility of transporting a single-piece turbine runner? Experience with over-pressure testing spiral cases for high heads? How can USACE encourage broader turbine-generator OEM participation? Balance of Plant Questions: Experience working in operational power plants with limited outages? Experience installing similar equipment in operating plants? Concerns about construction around embedded concrete piping and electrical conduits? Managing large workforces at remote sites? Transportation and installation considerations for large transformers and equipment? Project Labor Agreement (PLA) Submission Instructions for PLA: Submit PLA responses in writing by April 28, 2026, via email to leanne.r.walling@usace.army.mil. Please answer all questions. If not applicable, indicate “N/A”. PLA Questions: Knowledge of PLA use in the local area? Provide documentation. Awareness of skilled labor shortages? Elaborate and provide documentation. Awareness of time-sensitive issues affecting project completion? Elaborate and provide documentation. Reasons why a PLA would promote economy and efficiency? Reasons why a PLA might not promote economy and efficiency? Additional considerations regarding PLA use? Does your company plan to bid if a PLA is required? If not, will you bid if not required? Estimated cost impacts of including a PLA? Provide details. Information on recent projects (last 2-5 years): Project Name and Location Detailed Project Description Initial Cost Estimate vs. Actual Final Cost Was the project completed on time? Number of craft trades involved Was a PLA used? Challenges experienced during the project

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