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<br />i: <br /> <br />Some drainage of excess irrigation water on agricultural lands is <br />assumed, Drainage of irrigated land to maintain or increase crop yields <br />is accomplished by lowering the water table and intercepting water going <br />to deep percolation, Good drainage facilitates leaching, Minimal channel <br />stabilization to control erosion is anticipated for this alternative. <br />However, the ongoing efforts of individuals to protect their land is <br />expected to continue. No change in the operation or maintenance of the <br />existing irrigation water distribution systems is assumed. <br /> <br />This alternative would have a negligible effect on fish and wild- <br />life habitat. Virgin River is considered a fishery only due to documented <br />occurrence of the wouldfin which has been chartered by the State of Nevada <br />and the USFWS (Ref: 50 CFR, Part 17-11 and 17-12 (revised), published in <br />Vol. 45, No, 99 (May 20, 1980) of the Federal Register) as an endangered <br />species. The habitat of the would fin would not be affected because surface <br />water salinity will not change measurably, Other species of fish would <br />have slightly enhanced habitat due to the increased (200 acre-feet) sur- <br />face flow, <br /> <br />Clark County Conservation District and the Littlefield-Hurricane <br />Valley Conservation District will continue assistance with management of <br />wildlife on wetland and upland areas. The quantity of recreation land <br />and water, camping supply and demand, and picnicking supply and demand <br />are expected to remain at present levels. <br /> <br />Water quantity in the river would be similar to the present quantity, <br />Effective reduction in salt loading would not be attained through pro- <br />jected urbanization and land use changes, <br /> <br />Construction under the ongoing program (with minor salinity benefit) <br />is estimated to cost $300,000, For the comparable 10-year installation <br />period of a proposed salinity control program (see Table 2, page ix), <br />technical assistance is projected to be $90,000, This cost reflects <br />technical assistance to cooperators for new installation or replacement of <br />existing irrigation systems, and for onfarm wildlife habitat management. <br /> <br />rn(l~'l <br />..... ...J_ <br /> <br />42 <br />