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Present and Future Development LOWER BASIN DEPLETIONS Depletions described in this section include only those needed for the CRSS, a computer model developed by Reclamation to predict flow and salinity in the Colorado River. The depletions are only for the mains tern of the Colorado River in the Lower Basin. Estimates of future consumptive use by Lower Basin States of mainstem Colorado River water were derived from historical use and entitlement of 7.5 maf in the Lower Basin as set forth by the decree of the Supreme Court of the United States in Arizona v. California (March 9, 1964). Rates of development have been estimated by each State in those cases where a particular use is not yet fully developed. Certain other existing uses are presumed to be curtailed when the Central Arizona Project becomes fully operational. In California, the Seven Party Agreement (August 18, 1931) also serves as a basis for estimates of future use within that State. Nevada Robert B. Griffith Water Project-The project diverts Colorado River water for municipal and industrial uses. The project delivers water to Las Vegas Valley Water District, Nellis Air Force Base, and the cities of North Las Vegas, Henderson, and Boulder City. Other Users Above Hoover Darn-The users above Hoover Dam not from the Griffith Water Project include Basic Management Inc., the city of Henderson, Pacific Coast Building Products Inc., Boulder City, Lake Mead Recreation Area, and diversions at Hoover Dam. Southern California Edison-Prior to March 1, 1993, a portion of Nevada's allotment for use by the station was obtained via contractual arrangements by the Southern California Edison Company. These arrangements permitted the diversion of up to 23,000 acre-feet annually from the Colorado River for thermal power production purposes at the generating station site about 3 miles downstream from Davis Dam. These contractual arrangements were altered, effective March 1, 1993, so that the generating station, which continues to be separately metered, receives Colorado River water out of the entitlements of the Southern Nevada Water Authority. Fort Mohave Indian Reservation-The Fort Mohave Indian Reservation, located below Davis Dam, is allocated water by the Supreme Court Decree to irrigate 20,076 acres of land of which 16,018 acres are in Arizona; 2,119 acres are in California; and 1,939 acres are in Nevada. Water used on the lands in Nevada will primarily be for casino and golf course use. The reservation is allocated the lesser of an annual diversion of 12,534 acre-feet or the quantity necessary to supply the consumptive use for the irrigation of 1,939 acres of land. Laughlin and Miscellaneous Users Below Hoover Dam-Uses in the Laughlin area are expected to continue to increase. Arizona Imperial Wildlife Refuge-The Imperial Wildlife Refuge is entitled to divert 28,000 acre-feet per year or consumptively use 23,000 acre-feet per year, whichever is less. 35