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<br />D [W! 27 <br /> <br />- 13 - <br /> <br />acre feet per year. About 5,300 acres are irrigated in the <br />extreme northeastern part of the drainage which receives its <br />water supply by a: transbasin diversion from the Dolores River <br />Basin. Depletion by these lands is 8,400 acre feet per year. <br />9. Montezuma Valley. <br />This area is discussed separately because of the unique <br />status of the irrigation supply. Diversion takes place from the <br />Dolores River to serve lands in the Montezuma Valley. These lands <br />drain into McElmo Creek and other tributaries to the San Juan <br />River in this vicinity. The return flow from the valley lands <br />increases the flow of these streams significantly. <br />The flow of the Dolores River at Dolores for the 1934-54 <br /> <br />period has averaged about 313,500 acre feet per year. The <br />Montezuma Valley Irrigation District has diverted about 102,000 <br />acre feet per year for use on 30,550 acres. The stream depletion <br />is about 48,700 acre feet per year which reflects the large in- <br />cidental losses. <br /> <br />Depletions from reservoir evaporation losses and municipal <br /> <br />,I <br /> <br />uses averages about 2,000 acre feet per year. <br /> <br /> <br />10. Summary - Presently Irrigated Acreage and Stream Depletions <br /> <br /> Irrigated area lDepletion at <br />Area acres sd:tes of use <br />- <br />Upper San Juan Basin 9,400 7,600 <br />Piedra R:liver 4,200 5,200 <br />Los Pinos River 32,400 41,100 <br />Animas & Florida Rivers 24,800 26,700 <br />La Plata River 21,200 20,200 <br />Mancos River 10,400 11,600 <br />McElmo Creek 2,00 3,200 <br />