AZ vs. CA:06 California Exhibits, Vol. VI; Nos. 248-325

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CALIFORNIA DEFENDANTS Exhibit No. 286 Identification: May 14, 1957 Admitted: May 14, 1957 SALTON SEA UNDER FUTURE CONDITIONS Annual Inflow of Water and Salt and Required Elevation to Maintain Salt Balance Case I Case II Annual flow of A.A.C. at Pilot Knob Required Salt Input to Salton Sea 3 480 000 acre-feet Tons of Salt per Year 3 780 000 acre-feet Tons of Salt per Year From A.A.C. @ 1.25 tons/ac.ft. From Mexico-Alamo & New Rivers (150,000 acft. @ 5.5 tons/ac.ft.) From run-off from storms (100,000 acft. @ 0.5 tons/ac.ft.) 4 350 000 825 000 50 000 4 725 000 825 000 50 000 Total Annual Inflow to Salton Sea 5 225 000 Acre-Feet per Year 5 600 000 Acre-Feet per Year Contributions from Area Irrigated: From Area in U. S. Farm leaching requirement (0.9 ac.ft./ac. irrigated) Farm surface run-off (0.1 ac.ft./ac. irrigated) Canal system losses & unaccounted for Canal system regulation Return flow from cities, towns, etc. 567000 63 000 545 000 150 000 25 000 621 000 69 000 585 000 170 000 25 000 From Mexico-Alamo & New Rivers 1 350 000 150 000 1 470 000 150 000 Total Less Evaporation & Transpiration Losses: 1 500 000 1 620 000 From irrigation canal system From drains, rivers, and sloughs From farm ditches, fence rows and other misc. areas-2% of acreage irrigated @ 3.0 acft. nso ooo 144 000 38 000 2170 000 144 000 41000 Total Evap. & Transpiration Losses 332 000 355 000 Total Run-off from Storms 1 168 000 100 000 1 265 000 100 000 Total Annual Inflow to Salton Sea 1 268 000 1 365 000 Required Elevation of Salton Sea Acres Feet Acres Feet Required area of Sea with rate of evaporation 5.8 feet per year Elevation of Sea at Required Area 219 000 -235 Case I-630,000 net acres irrigated. Case II-690,000 net acres irrigated. Present losses of 123,000 increased in ratio of 500,000 to 630,000. 2Present losses of 123,000 increased in ratio of 500,000 to 690,000. 235 000 -230