(1) Defraying the costs of operation (including purchase of supplemental energy to meet temporary deficiencies in firm energy which the Secretary of Energy is obligated by contract to supply), maintenance, and replacements of all Project facilities, including emergency replacements necessary to insure continuous operations;

(2) Payment of annual interest on the unpaid investments in accordance with appropriate statutory authorities;

(3) Repayment of capital investments including amounts readvanced from the Treasury;

(4) Payments to the States of Arizona and Nevada as provided in section 2(c) of the Adjustment Act and section 403(c)(2) of the Colorado River Basin Project Act;

(5) Transfers to the Lower Colorado River Basin Development Fund and subsequent transfers to the Upper Colorado River Basin Fund, as provided in section 403(c)(2) of the Colorado River Basin Project Act and section 102(c) of the Hoover Power Plant Act, as reimbursement for the monies expended heretofore from the Upper Colorado River Basin Fund to meet deficiencies in generation at Hoover Dam during the filling period of storage units of the Colorado River Storage Project in accordance with the provisions of sections 403(g) and 502 of the Colorado River Basin Project Act, such transfers, totalling $27,591,621.25, to be effected by 17 annual payments of $1,532,868.00 beginning in 1988 and a final payment of $1,532,865.25 in 2005; and

(6) Any other purposes authorized by existing and future Federal law.