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<br />Description of Area: <br /> <br />RESOURCE USE <br />For <br />IRRIGATION WATER <br /> <br />Virgin Valley Sub evaluation Unit, Arizona, Nevada, Utah <br /> <br />Parameters <br /> <br />Gross Diversions <br /> <br />Seasonal Net Application <br /> <br />Area served <br /> <br />1/ <br />Water use efficiency <br />~/ <br />Conveyance efficiency <br /> <br />Available Supply <br /> <br />Direct flow <br /> <br />Reservoir storage <br /> <br />Groundwater pumpage <br />Reuse!/ <br /> <br />Quality <br /> <br />Adequacy to Meet Require- <br />ments <br /> <br />Availability versus Time <br />of Need <br /> <br />Return Waters <br /> <br />Surface flow (field <br />runoff) <br /> <br />Groundwater recharge <br />(field deep percolation) <br /> <br />Quali ty <br /> <br />1/ <br />SlIDIDIary Rating <br /> <br />11 Onfarm. <br />21 Off-farm. <br />31 The rating scale is from 1 <br />- 4, good; and 5, excellent. <br /> <br />Unit <br />ac-ft/yr <br /> <br />ac-ft/yr <br /> <br />acres <br /> <br />percent <br /> <br />percent <br /> <br />ac-ft/yr <br /> <br />ac-ft/yr <br /> <br />ac-ft/yr <br />ac-ft/yr <br /> <br />rating <br /> <br />percent <br /> <br />]/ <br />rating <br /> <br />ac-ft/yr <br /> <br />ac-ft/yr <br />ratin~1 <br /> <br />to 5: <br /> <br />Present <br />Conditiona <br /> <br />42,750 <br /> <br />15,750 <br /> <br />3,525 <br /> <br />44.0 <br /> <br />96.5 <br /> <br />220,800 <br /> <br />-0- <br /> <br />500 <br /> <br />minor <br /> <br />2 <br /> <br />97.5 <br /> <br />3 <br /> <br />6,450 <br /> <br />19,000 <br /> <br />2 <br /> <br />3 <br /> <br />Future Conditions <br />Planninlt Alternatives <br />Future I I <br />Without 1 2 <br /> <br />42,350 <br /> <br />30,450 <br /> <br />26,150 <br /> <br />15,650 <br /> <br />16,150 <br /> <br />16,150 <br /> <br />3,495 <br /> <br />3,495 <br /> <br />3,495 <br /> <br />43.0 <br /> <br />58.0 <br /> <br />62.0 <br /> <br />96.5 <br /> <br />95.0 <br /> <br />99.0 <br /> <br />220,800 <br /> <br />221,000 <br /> <br />221,000 <br /> <br />-0- <br /> <br />-0- <br /> <br />-0- <br /> <br />500 <br /> <br />, <br /> <br />500 <br /> <br />500 <br /> <br />minor minor <br /> <br />mi nOr <br /> <br />2 2 <br /> <br />2 <br /> <br />97.5 97.5 <br /> <br />97.5 <br /> <br />3 3 <br /> <br />3 <br /> <br />;~ <br /> <br />6,375 <br /> <br />3,080 <br /> <br />3,080 <br /> <br />18,825 <br /> <br />9,740 <br /> <br />4,467 <br /> <br />2 <br /> <br />2 <br /> <br />2 <br /> <br />3 <br /> <br />3 <br /> <br />3 <br /> <br />1, unsuited; 2, poor; 3, fair or <br /> <br />neutral; <br />,"t (. ,...., ..~, ... IJ <br />. .... L....:., \..1 <br /> <br />A-18 <br />