Authorizes the Secretary of the Interior to reimburse the Fall River Rural Electric Cooperative, Idaho, for expenditures incurred to meet environmental protection requirements for hydroelectric power development at the Island Park Dam and Reservoir, Upper Snake River Division, Minidoka Project, Idaho and Wyoming.

Requires that any moneys appropriated under this Act be placed in escrow until the hydroelectric power facilities are in service. Provides that if the facilities are not in service by December 31, 1992, all moneys and accumulated interest shall be returned to the Treasury.

Authorizes appropriations.