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<br />Total cost for Alternative 2 including $506,800 for technical assistance <br />is $6,279\900. Total program cost with operation, maintenance and replace- <br />ment addea in is $883,500 annually. <br /> <br />Downstream and onfarm annual benefits increase during installation and <br />total $1,563,400 following installation. Downstream annual benefits are <br />$1,032,400 based on a reduction of 2.0 milligrams per liter in salt concen- <br />tration in the Colorado River at Imperial Dam near Yuma, Arizona. Water <br />diverted for irrigation would be reduced 5,000 acre-feet increasing instream <br />flow in Muddy River. An estimated 86 percent of this water could be applied <br />to other uses. These other uses would have an annual value of $198,000 based <br />on the value of water used for agriculture in the valley. Annual onfarm <br />benefits accruing from implementing Alternative 2 are $333,000. This includes <br />annual labor savings of $72,000. Total program benefits are $2,327,700 <br />annually ($1,563,400 for a 25-year period and $764,300 during the installation <br />period). <br /> <br />Implementation of Alternative 2 could require a 75 percent or greater <br />federal cost-share assistance to assure farmer participation. Land users <br />would furnish the remaining 25 percent or less, plus annual operation, main- <br />tenance, and replacement costs. See Table 1. High local indebtedness may <br />require substantial cost-share assistance or total federal financing for the <br />irrigation delivery system in Lower Valley. Proper irrigation water manage- <br />ment of the improved systems will be essential to achieve the salinity control <br />objectives. <br /> <br />TABLE 1. ANNUAL LEVEL OF FUNDING FOR 10-YEAR INSTALLATION PERIOD, <br />ALTERNATIVE 2, MOAPA VALLEY SUBEVALUATION UNIT, NEVADA <br /> <br />Annual Federal Funding Annual Other Funding Annual <br />---------------------------------- ------------------------------- ---------- <br />y <br />Construc- Technical Construc- y <br />tion Assistance Total tion OM&R Total Total <br />$433,000 $50,700 $483,700 $144,300 $5,300 $149,600 $633,300 <br /> <br />y July 1980 Prices - Based on 75 percent federal cost-sharing assistance. <br />y OM&R: Operation, Maintenance and Replacement. <br /> <br />002677 <br /> <br />iv <br />