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<br />0171 <br /> <br />Agricultural Econo~ <br /> <br />. <br /> <br />values for the entire unit. This computation and extension of the <br />irrigation benefits for the entire unit are shown in table 19. <br /> <br />Table 19.--Summary of annual irrigation benefits <br /> <br />Item Direct Indirect Public Total <br />Benefi ts for representative <br />farm $ 4,102 $ 185 $ 235 $ 5,122 <br />Benefits per acre-foot at <br />farm headgate <br />(229.12 ac.-ft.) 20.41 3.42 1.02 24.91 <br />Benefi ts per acre-foot at <br />Narrows Dam ~ 12.71 2.12 0.63 15.46 <br />Gross irrigation benefits <br />at Narrows Dam 1,394,000 233,000 69,000 1,696,000 <br />(109,100 ac.-ft.) EI <br />Less adverse effects -27,700 -52,BoO -80,500 <br />Plus direct savings OM&R 16,000 16,000 <br />Net irrigation benefits ~l,4l0,000 $205,300 $l6,200 $1,63l,500 <br /> <br />. <br /> <br />~/ Based on average transportation losses of about 38 percent between <br />Narrows Dam and farm headgates. <br />~/ 109,700 ac.-ft. is the sum of 88,400 ac.-ft. of stored water <br />released from the reservoir and 21,300 ac.-ft. of usable return <br />flows. <br /> <br />The gross irrigation benefits for the Narrows Unit, summarized in <br />table 19, are based on the application of acre-foot values to 109,700 <br />acre-feet of water. This quantity comprises 88,400 acre-feet of stored <br />water to be released at the reservoir and 21,300 acre-feet of usable <br />return flow. No benefits are claimed for 31,000 acre-feet of water <br />having direct flow rights which would be acquired with the purchase <br />of' reservoir rights-of-way. That water would be sold as part of the <br />unit supply; however, it is assumed to have equivalent values for <br />irrigation under project use as under present use and no gain in <br />benefits would be realized. <br /> <br />Indirect and public irrigation benefits were adjusted for adverse <br />effects resulting from the inundation of certain lands in the reservoir <br />area. Adverse effects represent the losses in profits from marketing <br />and processing attributable to the decreased fann production, and the <br />loss of growth potential of the overall econo~. In addition, a loss <br />of settlement opportunity due to an estimated decrease of 40 farm units <br />at $1,235 each was charged to public benefits. <br /> <br />. <br /> <br />80 <br />