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<br />) <br /> TABLE 2. SUMMARY OF COSTS, BENEFITS AND PHYSICAL EFFECTS OF ALTERNATm PLANS <br /> VIRGIN VALLEY SUBEVALUATION UNIT, ARIZONA, NEVADA, UTAH <br /> Future ALTERNATIVES <br /> Item Unit Without 111 # <br />>' COST (ONE-TIME) : (Thou:sand Dollars) ~ <br /> Onfarm Irrigation System:s 200.0 466.0 1,937.0 <br /> Off-farm DeliveM' Svst""'''' 100.0 44.4 733.0 <br /> Total Construction 300.0 510.4 2,670.0 <br /> , <br /> Technical Assistance 90.0 182.6 430.0 <br /> Total Installation 390.0 693.0 3,100.0 <br /> ANNUAL COST: <br /> Installation 34.6 61.5 275.0 <br /> Operation, Maintenance and <br /> Replacement (OM&R) , 41 15.0 18.0 53.4 <br /> Interest During Con:structioD- 31.4 33.8 137.9 <br /> Follow-up Technical Assistance 13.5 13.5 13.5 <br /> Total 94.5 126.8 479.8 <br /> ANNUAL BENEFITS: <br /> Salinity Reduction (Downstream) 1.4 861.9 2,052.4 <br /> Increased Efficiency of Crop <br /> Production 14.6 184.5 119.8 <br /> Benefits During Installation 7.8 511.6 1.062.0 <br /> Total 23.7 1,558.0 3,234.2 <br /> ANNUAL NET BENEFITS: -70.8 1,431.2 2,'754.4 <br /> <br />PHYSICAL EFFECTS: <br />Salt Load Reductio021 tons/yr -200 15,100 37,200 <br />Sal t Concentration Reduction2! mg/l negligible 1.7 4 <br />Net Annual Increase of Water in <br />River System ac-ft 200 800 800 <br />Wetland Habitat Lost ac-value 8 16 40 <br />Upland Habitat Gained ac-value 8 16 40 <br />Onfarm Increase in Fossil Fuel <br />Requirement (Average Annual) gal/yr 30 480 710 <br /> <br />11 Altemati.,. 1... Use uhting canal and lataral syste_ with .1nor repair,. flllPl'Ove ont.".. irrigation syste... <br />. II AlternaUve 2 - t~rove canal, pipeline Ind lateral sy,teIIlnd on1.... irrigation sys'tHS. '1ni_ deep <br />percolation and high irrigation .f1iciency. <br />Y Price bas.. July 1980. Benefits and costs were c~uted in present value tl!"", using a lQ..YI.r 1nstal1.tion <br />period. Costs Ire amnized over a 2~ye.r 111t at 7 3/8 Plretnt intlrest. <br />4/ Includes O&M. intlrest on DIM. and interest on the construction cost tncarred during thl installation plriod. <br />fJ An tnert.,. froll pres.nt condition (of 200 tons). occurs for thl future ~ fthout a salinity cantrol progr.ln. <br />]V Colorado River It Imperial 0._. netr fume. Arizona. <br /> <br />vj, <br /> <br />(, iJ' , t'.". . <br />,. ,.~ . <br />,,: \. l 4: \J ~ <br />