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<br />MAY 1982 <br /> <br />Implementation of this plan would not increase the amount of water <br /> <br />diverted annually for irrigation. Seepage from onfarm ditches would not be <br /> <br />reduced and deep percolation would be reduced by 2,000 acre-feet. Improved <br /> <br />onfarm management of irrigation water would provide 54,000 acre-feet of <br /> <br />water for consumptive use by farm crops in the valley. Annual return flow <br /> <br />to the river system, the sum of seepage, deep percolation and tailwater <br /> <br />runoff, would be reduced by 21,000 acre-feet. (See Table AI-4). <br /> <br />The 17,000 ton reduction in salt load represents a 31 percent reduction <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 NUMBER 2 <br />ESTIMATED QUANTITIES AND COSTS <br />Item Units Quantities Cost <br />PIPELINE: <br />GROUP IJITCHES mi. 0 U <br />FARM DITCHES mi. 0 0 <br />MEASURING DEVICES ea. 4,200 4,619,000 <br />SPRINKLER SYSTEMS: <br />GRAVITY PRESSURE ac. 0 U <br />PUMPED PRESSURE ac. 0 0 <br />TOTAL COST $ 4,619,000 <br /> <br />V-7 <br /> <br />('C1881 <br />