Dworshak Unit 4

The U.S. Army Corps of Engineers (USACE) is seeking information from interested firms for the expansion of the generation capability of the Dworshak Dam Powerhouse by extending the existing powerhouse structure and installing an incremental fourth generating unit (Main Unit 4). The scope of this sources sought solicitation pertains exclusively to design and construction of the project’s civil and structural work. This includes preparation and development of the site, powerhouse and tailrace substructure construction, and erection of a functional building envelope as part of the powerhouse extension. The estimated magnitude of construction is between $100,000,000 and $250,000,000. • The project is located on the Clearwater River in Ahsahka, ID, approximately 50 miles east of Lewiston, ID. • The project involves design and construction of civil and structural work, including powerhouse extension, penstock extension, and site bridge structure. • The project requires coordination with other contractors and the Government, as well as compliance with environmental controls to avoid oil spills and other impacts. • The project has limited room for contractor operations and equipment staging adjacent to the powerhouse, and remote sites may be necessary for work crew parking, equipment staging, and office trailers. • The project involves construction of temporary in-water structures in the tailrace and necessary site development of the skeleton bays.