Construction of Hydroelectric Powerplants: Hearing Before the Subcommittee on Energy Research and Development of the Committee on Energy and Natural Resources, United States Senate, Ninety-sixth Congress, First Session on S. 475 a Bill to Authorize the Secretary of the Interior to Construct Hydroelectric Powerplants at Various Existing Water Projects, and for Other Purposes, S. 1420 a Bill to Authorize the Secretary of the Interior to Construct, Operate, and Maintain Hydroelectric Powerplants at Various Existing Water Projects, and for Other Purposes, S. 1764 a Bill to Authorize the Secretary of Interior to Construct, Operate, and Maintain an Enlargement of the Palisades Project, Idaho-Wyoming, with Financing by Public, Non-federal Entities, and for Other Purposes, September 21, 1979