Directs: (1) the Secretary of Commerce to publish a determination of whether implementation of the salmon recovery measures in the opinion are sufficient to achieve recovery, under the Endangered Species Act of 1973, of the salmon and steelhead populations; and if not, whether partially removing the four lower Snake River dams (the dams) are necessary to restore Snake River salmon and steelhead populations; (2) the Secretary of the Interior to publish a determination of whether partially removing the dams are necessary to meet treaty obligations; and (3) the Environmental Protection Agency (EPA) to publish a determination of whether partially removing the dams are necessary to meet Federal Water Pollution Control Act requirements. Directs the Comptroller General to study the potential effects of partially removing the dams.
Authorizes the Secretary of the Army, acting through the Corps of Engineers, to partially remove the dams if the Secretary of Commerce, the Secretary of the Interior, or the EPA Administrator finds that such action is necessary to meet the aforementioned requirements. Directs the Secretary of the Army to undertake such preliminary engineering, design, construction, and other activities as necessary to remove the dams.