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<br />MAY 1982 <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 35,000 acre-feet. <br /> <br />(See Table AI-4). <br /> <br />The 32,000 ton reduction in salt load represents a 59 percent reduction <br /> <br />in the total salt load being delivered to the Colorado River from onfano <br /> <br />irrigation sources in the McEImo Creek Hasin. <br /> <br />P LAN NUMBER 5 <br />ESTIMATED QUANTITIES AND COSTS <br /> <br />Item Units Quantities <br />PIPELINE: <br />GROUP DITCHES ci. 235 <br />FARM DITCHES mi. 33 <br />MEASURING DEVICES ea. 40U <br />SPRINKLER SYSTEHS <br />GRAVITY PRESSUKE ac. 10 ,400 <br />Pill-lPED PRESSURE ac. 9,300 <br />TOTAL COST S <br /> <br />Cost <br /> <br />6,13b ,OOu <br />893,000 <br />408,000 <br /> <br />8,101,OOU <br />7,784,000 <br /> <br />23,322,000 <br /> <br />Plan Six - Ditch Lining Only - 28,450 Acres <br /> <br />This plan assumes ditch lining would be the only practice installed <br /> <br />under the Salinity Control Program. Group ditches in the entire off-farm <br /> <br />delivery system are included along with the farm ditches on individual <br /> <br />fields and farms. Preserving gravity pressure would not be required, <br /> <br />therefore, open ditches with concrete lining would be considered for <br /> <br />installation along with pipe. <br /> <br />('4..'6?Jeo <br />(' \; ). , . <br />~. <br /> <br />V-12 <br /> <br />i:, <br />