COST SHARING.

SEC. 4108. COST SHARING. (a) Federal Cost Share.— (1) In general.—Except as provided in paragraph (2), the Secretary shall provide funds equal to 80 percent of— (A) the amount allocated in the total project construction budget for planning and construction of the water supply project under section 4103; and (B) such amounts as are necessary to defray increases in development costs reflected in appropriate engineering cost indices after September 1, 1993. (2) Sioux falls.—The Secretary shall provide funds for the City of Sioux Falls, South Dakota, in an amount equal to 50 percent of the incremental cost to the city of participation in the project. (b) Non-Federal Cost Share.— (1) In general.—Except as provided in paragraph (2), the non-Federal share of the costs allocated to the water supply system shall be 20 percent of the amounts described in subsection (a)(1). (2) Sioux falls.—The non-Federal cost-share for the City of Sioux Falls, South Dakota, shall be 50 percent of the incremental cost to the city of participation in the project.