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<br />MAY 1982 <br /> <br />54,000 acre-feet of water for consumptive use by farm crops throughout the <br /> <br />valley. Annual return flow to the river system, the sum of seepage, deep <br /> <br />percolation and tailwater runoff, would be reduced by 25,00U acre-feet. <br /> <br />(See Table AI-4). <br /> <br />The 18,000 ton reduction in salt load represents a 33 percent niduction <br /> <br />in the total salt load being delivered to the Colorado River from onfarm <br /> <br />irrigation sources in the McElmo Creek Basin. <br /> <br />PLAN NU/lEER 3 <br />ESTIMATED QUANTITIES AND COSTS <br /> <br />Item Units Quantities Cost <br />PIPELINE: <br />GROUP DITCHES mi. 235 6,136,000 <br />FARM DITCHES mi. 0 0 <br />MEASURING VEVICES ea. 4,200 4,619,000 <br />SPRINKLER SYSTEMS: <br />GRAVITY PRESSURE ac. 150 117,000 <br />PUMPED PRESSURE ac. 500 420,000 <br />TOTAL COST S 11 ,292,000 <br /> <br />Plan Four - Irrigation Water Hanagement and Ditch Lining with Gravity <br /> <br />Pressurized Sprinkler Systems - 21,050 Acres <br /> <br />This plan assumes installing sprinkler systems on 10,400 acrs of <br /> <br />irrigated land that can be adequately served by gravity pressure only. <br /> <br />Irrigation water management on the other 10,650 acres of irrigated land <br /> <br />V-9 <br /> <br />,. "Ot):> <br />() \. ~ 0 <br />