A bill to authorize the Secretary of the Interior to construct, operate, and maintain modifications of the existing Buffalo Bill Dam and Reservoir, Shoshone Project, Pick-Sloan Missouri Basin Program, Wyoming, and for other purposes.

Authorizes the Secretary of the Interior to construct, operate, and maintain the Buffalo Bill Extension of the Shoshone project in the State of Wyoming. Lists the principal works of the project including the raising of the Buffalo Bill Dam by 25 feet.

Sets forth the order of priority which the Secretary shall follow in making water available upon completion of the Buffalo Bill Dam raising.

Makes provisions for the financing of such project.