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<br />Agricultural Systems and Practices <br /> <br />There are five separate irrigation diversions and delivery systems <br />supplying irrigation water to the 2,060 irrigated acres in Upper <br />Moapa Valley. The delivery systems consist of about '0 miles of open <br />ditches. The condition of the sys.ems is fair. There are no reservoirs <br />for storage in the Upper Valley. <br /> <br />Water is diverted during the winter months at Wells Siding Diversion <br />structure in lower Moapa Valley to Bowman Reservoir. About 4,000 acre- <br />feet of stored water is delivered to lower Valley in the summer months <br />along with available stream flow. The water is distributed by Muddy Valley <br />Irrigation Company's ditch system. Their system is approximately 306,000 <br />feet (58 miles) in length, with an average ditch size of 18 inches bottom <br />width and 30 inches depth. There are 242 stockholders in the irrig~tion <br />company servicing 2,922 acres. The ditch delivery system is in poor condition. <br />The concrete lined portions have deteriorated from sulfate reactions. <br />Presently, the irrigation company operates a rotational system, providing <br />water every seven days. <br /> <br />Nevada Department of Wildlife has a diversion located immediately <br />above lake Mead which irrigates the 510 acres of the Overton Wildlife <br />Management Area. The present system of graded borders and lined ditches <br />is being replaced with level basins and plastic pipeline. <br /> <br />Irrigation methods in Moapa V~lley are random flooding, graded and <br />level borders, corrugation and furrow. The predominant method used is <br />graded borders. <br /> <br />The present irrigation efficiency, based on an analysis of a sample <br />of 28 percent of the irrigated acreage in the Moapa Valley, averages <br />45 percent. <br /> <br />Conservation measures presently applied on irrigated and adjacent <br />lands include: <br /> <br />Brush Management <br /> <br />Clearing and Snagging <br />Conservation Cropping Systems <br />Crop Residue Management <br />Irrigation Ditch and Canal lining <br />Irrigation Field Ditch <br /> <br />18 <br /> <br />Irrigation Water Management <br />Irrigation land leveling <br />land Smoothing <br />Structures for Water Control <br /> <br />Wildlife Wetland Management <br />Wildlife Upland Management <br /> <br />f'. '\ ,... r: 9. 8 <br />',:\.; '-u <br />