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<br />SETTING <br /> <br />Location <br /> <br />Moapa Valley Subevaluation Unit is in Clark County near the southeastern <br />corner of Nevada (see Figure 1). This unit is about 40 miles long in a <br />north-south direction and has an area of 874 square miles. Interstate Highway <br />15 crosses the study area in a northeast direction. Oth~r highways include <br />State Highway 40 and U.S. Highway 93. In addition, the Union Pacific Railroad <br />traverses the unit. Most services are available within a two hour drive <br />in the Las Vegas metropolitan area. <br /> <br />During planning the Moapa Valley was determined to be a contributing <br />area of salts to the Colorado River and was selected by USDA for study. <br />Areas not studied are Upper Muddy River, White River and Meadow Valley Wash <br />areas, which are essentially noncontributing areas on which a treatment <br />program would not significantly reduce salinity. See inside of cover. <br /> <br />Figure 2 shows land ownership within the Moapa Valley Subevaluation <br />Unit in Nevada. Study objectives are for improvements on privately owned <br />and Indian owned lands. Figure 3 shows the Moapa Valley area of privately <br />owned and Indian owned lands on which program implementation would occur. <br />Environmental impacts other than those related to downstream water quality <br />and quantity will occur within this vicinity. Such impacts include improvement <br />of low flow water quality, disturbance of wildlife habitat due to additional <br />agricultural activity, etc. <br /> <br />LINCOLN co. I <br />CLARKCO-' <br /> <br /> <br />Fi gure 2 <br /> <br />f <br /> <br /> lEGEW <br />c:::::J Public o...ln <br />f2Z2l Federal and Stlte <br />~ Indian Arservation 5 0 5 Miles <br />- , , <br />Prl.ate Scale <br />"- Hydrologic Boundary <br /> <br />LAND OWNERSHIP <br /> <br />Moapa VIlley Sube.aluatlon Unit, Ne.ada <br /> <br />of the Virgin RI.er Unit <br /> <br /> <br />Colorado RI.er Basin Salinity Control Progr.. <br /> <br />USDA-SCS <br /> <br />6 <br /> <br />002686 <br />