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<br />. <br /> <br />. <br /> <br />. <br /> <br />" . ~ ". <br /> <br />002329 <br /> <br />CHAPrER III <br /> <br />PROJECT DEVELOP/<IE!-IT <br />(Hayden Mesa unit) <br /> <br />Cost estimates <br /> <br />The construction cost of the Hayden I~sa unit is estimated at <br />$11,671,000 or $515 per acre of full irrigati~n service land or equivalent. <br />The ~~nual operation, maintenance, and replacement costs are estimated at <br />$63,800. Estimated costs of the unit are itemized below. <br /> <br />Estimated costs--Hayden Ilesa unit <br /> <br />Annual operation, <br />maintenance, and <br />~lacement costs <br />-:j;4, 700 <br />9,300 <br />38,600 <br />2,800 <br />1,000 <br />7,400 <br /> <br />Feature <br />Dunkley Reservoir <br />East Fork Feeder CGnaLbl <br />Hayden Bench Canal <br />Twenty Mile Park Canal <br />DrainG <br />Laterals <br />Past investiGations <br />Future investigations <br />Total <br />!I Includes co~ts of East <br /> <br />Construc- <br />tion cost <br />$4,4:'22,000 <br />2,655,000 <br />3,310,000 <br />116,000 <br />110,000 <br />920,000 <br />31,000 <br />_~09, 000 <br />11, i) 71,000 <br />Fork Diversion Dam, <br /> <br />63,800 <br /> <br />Uni t lends and land use <br /> <br />The irrigable acreage to be served by the Hayden Mesa unit is sum- <br />marized below by land class. <br /> <br />LAlld <br />class <br />Class 1 <br />Class 2 <br />Class 3 <br />Total <br /> <br />Irrigable acreage--Hayden <br />(Unit--acres) <br />Full irriga- <br />tion service <br />l,,-~d. <br />940 <br />9,230 <br />-1:.?0.20 <br />22,640 <br /> <br />105 <br />195 <br />290 <br /> <br />Mesa unit <br /> <br />Supplemental <br />irrigatiCln <br />service ls::>d <br /> <br />Total <br />940 <br />9,385 <br />12,615 <br />22,940 <br /> <br />Lands of the Hayden Mesa unit are from 6,100 to 7,000 feet in eleva- <br />tion. They are situ,::.ted in the stream valleYR and on bench' J.ands adjacent <br />to the vaJ,leys. Soils comprising the valley lands are principally allu- <br />vial while those of tloe benches are gencralJ.y residual, Lands in the cen- <br />tral and western' part of the area have sli:;htly undulating surface s but <br />are in relatively large tracts that can be readily divided into efficient <br />farm units. These lands are gently aloping and have good natural surface <br />drainage characteristics. Lands in the eastern part of the area are more <br />eroded by local streams and are topographically J.ess sui table for farm <br />units. They are situated on rounded hills and ridges and along the flood <br />plains of streams. Because of underJ.ying shale or heavy clay subsoils, <br /> <br />32 <br />