AZ vs. CA:24 California Exhibits, Vol. XXIV; Miscellaneous

page 109

PROBLEMS OF IMPERIAL VALLEY AND VICINITY. 109 Based on the above estimate of discharge, the present irrigation system is sufficient in the average year for 30,000 acres, as shown by the following: Supply. Demand, 2,500 feet per acre. Surplus and deficits. October and April. May............... June............... July............... August............ 14,000 14,000 38,000 17,000 5,000 7,500 27,600 27,600 12,000 + 14,000 + 6,500 + 10,400+30,900 -10,600 - 7,000-17,600 88,000 74,700 In dry years the supply will be short because of lack of reservoir capacity. i . The run-off tributary to Eden Reservoir No. 2 is estimated to be 60,000 acre-feet annually, based on fragmentary measurements made in 1911, but about 30,000 acre-feet of this is required to fill old rights between this reservoir site and the diversion. The remainder should be sufficient for 10,000 acres at 2.5 feet per acre .because of large reservoir capacity to hold years of heavy run-off. The project will eventually total 40,000 acrss, and it is probable the west side will never be built. SUMMARY, GREEN RIVER BASIN, WYOMING. 1. Present irrigation above town of Green River: Territorial rights.....................,.................. 30,000 Adjudicated rights...................................... 195,000 Carey Act lands irrigated but not adjudicated: • Fremont Lake project........................ 1,000 East Fork................................... 1,000 Bertram..................................... 700 Cottonwood.................................. 600 Eden....................................... 7,000 Total...................................... 10,300 Say............................................. 10,000 Miscellaneous lands under permit, irrigated but not adjudicated-an arbitrary figure............................. 15, 000 2. Near-future irrigation: Carey Act lands under con- structed or partially-constructed systems but not yet irrigated:l Boulder......................................... 3, 200 Fremont Lake....................'.............. 6,000 East Fork....................................... 3, 900 Paradise......................................... 4,100 Green River-Cottonwood-Big Piney- From Green River.......................... 25, 000 From Cottonwood........................... 4, 000 "67" Reservoir.................................. 2,100 "Eden........................................... 33,000 ---------¦ 81,000 Big Piney-La Barge to be constructed in 1921............ 6,000 Permits issued since 1918, total 19,200 acres, part eventually irrigated, estimated will be........................... 15,000 250,000 102, 000 1 State Carey Act engineer's estimate of irrigable acreage. 93715-S. Doc. 142,67-2------10