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.' 0017 97 . . In addition, there are water rights on the lower basin tributaries, totaling about 2,000,000 acre-feet per annum. The major lower basin tributary is the Gila River system, with its major tributaries the Salt and the Verde. The Gila system rises in New Mexico, crosses southern Arizona, where it supplieS the principal agricultural area in that state, and except for unusual floods is entirely consumed before reaching the main stream at Yuma.1I Its safe annual yield, according to California findings, is l,750,OOO acre-feet per annum. There are other tributaries in the lower basin, both above and below Hoover Dam, from which quantities of about 200,000 acre-feet per annum are consumed. These tributaries, in addition to partially offsetting main stream channel losses, contribute more than 1,000,000 acre-feet to the main stream supply. None of the states or the United States has asked the Court to curtail uses by any existing project, either on the main stream or tributaries, except projects in California. If Arizona prevails, California projects would be curtailed to 4,400,000 acre-feet, without any recognition of interstate priority, and to perhaps 3,000,000 acre-feet if the contentions of the United 11 The overdraft on the Arizona ground water basins fed by the Gila, estimated to have a capacity of 100,000,000 acre-feet or more, enables a total present use from the Gila system of more than 3,000,000 acre-feet per annum. California proposes to limit Arizona's accountability under the Compact to the safe annual (or replenishab1e) yield, computed by California operation studies at about 1,750,000 acre-feet for the entire Gila basin in Arizona and New Mexico. 9.