A bill to authorize the Bureau of Reclamation to provide cost sharing for the endangered fish recovery implementation programs for the Upper Colorado River and San Juan River basins.

Authorizes appropriations to the Secretary of the Interior to undertake capital projects for the Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin and the San Juan River Basin Recovery Implementation Program. Terminates the authority to implement projects for such Programs at the end of FY 2005 and 2007, respectively. Limits to $100 million the total cost of authorized projects.

Authorizes the: (1) Secretary to accept contributed funds from Colorado, New Mexico, Utah, and Wyoming, or political subdivisions or organizations thereof, pursuant to agreements that provide for such contributions to be used for capital project costs; and (2) Secretary and the Secretary of Energy, acting through the Western Power Administration, to utilize for such projects power revenues not exceeding $17 million collected pursuant to the Colorado River Storage Project Act. Makes funds available on a matching basis with funds contributed by the above States. Authorizes alternative project funding through loans from the Colorado Water Conservation Board Construction Fund (with specified loan requirements). Authorizes the Secretary to utilize the power revenues, above, for the annual base funding contributions to the programs by the Bureau of Reclamation. Provides funding limits for each Basin Program. Terminates at the end of FY 2011 the authority for the use of power revenues for annual base funding, with an exception. Requires a report from the Secretary to Congress on the use of such revenues. Requires the Administration and the Bureau to maintain sufficient Fund revenues to meet the base funding requirements.

States that nothing in this Act shall restrict the Secretary from funding activities or capital projects in accordance with the Federal Government's Indian trust responsibility.