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<br />. <br /> <br />As previously mentioned, present depletions by mainstream projects below <br />Hoover Dam were determined largely by records of measured diversions <br />from the river less measured returns to the river. Estimates of depletions <br />in fUture years were computed largely by multiplying irrigable acres under <br />full development by a use rate determined for each area based on recent <br />3- or 4-year averages of measured diversions and measured returns with <br /> <br />some minor modifications as diacussed in the second paragraph of <br /> <br /> <br />Section III hereof. Generally, for organized developments (irrigation <br /> <br /> <br />districts and Indian Reservations) between Davis and Imperial DIlIIIlI, a <br /> <br /> <br />use rate of 4.3 acre-feet per irrigable acre vas utilized. However, <br /> <br /> <br />. for two of the three contractors in Mohave County (Lake Havasu Irrigation <br /> <br /> <br />and Drainage District and the City of Kingman) a gradual buildup to the <br /> <br /> <br />full contracted diversion quantities, totaling 33.000 acre-feet. was <br /> <br /> <br />assumed. Tbe third contractor, Mohave Valley Irrigation and Drainage <br /> <br /> <br />District, was assumed to build up to a consumptive use of about 70 percent <br /> <br /> <br />of the full contracted diversion or about 35.700 acre-feet. For <br /> <br />miscellaneous users, a use rate of about 70 percent of the average <br /> <br />diversion rate of 6 acre-feet per acre was utilized since there are <br /> <br />no records of returns. For organized districts in Arizona below <br /> <br /> <br />Imperial Dam, a use rate of approximately 4.6 acre-feet per acre was <br /> <br /> <br />utilized. On the Reservation Diviaion of the Yuma Project in <br /> <br />8 <br /> <br />. <br />