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<br />DIVERSION PIAN AND STRUCTURES
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<br />REPLlI.CEME Nr
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<br />r to proteot the water users in the Colorado River Basin against
<br />on of their water supply by diversions through theContinentalDi-
<br />to northeastern Colorado,. a .'ltoro.ge 'reservoir is planned on the
<br />bout 16 mUes southeast of KremmUng. Colo. This reservoir is'to
<br />the Green Mountain.
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<br />site is looated in ,the E 1/.2 ofseo. 15. T. 2 S., ,R. 80 W., 1l1xth
<br />ridian. near the head of a box oanyon. between Green and t.ittl!l
<br />ins. oaused by the river outtingthrough a porphyry sill. The
<br />edrock oonsists of sedimentary rooks. either Dakota sandstone 9r
<br />les, and the intrusive porphyry.
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<br />igation outlet oapaoity is 1,000 oubio feet per seoond. and thll power
<br />ity is 1,500 oubio feet per seoond. The spillway oapaoity is ~5,OOO
<br />er seoond.
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<br />flood, 2.100 aores of land and will have a oapaoity of
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<br />e water-supply studies it was found. assUlning that full. developnent
<br />aoe ip the Colorado River Basin and that the Big Thompson projeot
<br />'had been i operation the last 35 years. that in the year 1931., the lowest year
<br />of dependab erun-9tf reoord, the Colorado Ea,sin users above Glenwood Springs
<br />would have, en shorted 37,000 acre-feet for irrigation use and the Publio
<br />Serlioe Co. would have been shorted 16.000 aore-teet at their power plant t.t
<br />Shoshone d ing the nonirrigation season, or a total shortage of 53,OOOaore-
<br />'feet. 400 dingly. 50,000 aore-feet of Green M9untain storage have been 8.'1-
<br />looated t<1 plaoell1&nt purposes forwhioh the water users in northeastern Colo-
<br />Fado will 'p Y $1,500,000. The remaining 100,000 aore-feet are allooated to
<br />power and 11 be paid for out of power revenues.
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<br />Sinoe he average shortage forb,oth power and irrigation for the last 10
<br />years, the owest 10 years of run-off reoord, is 36,000 aore-feet. There W9uld
<br />be the 16,0 aore-feet differenoe, and a portion of the 100,000 aore-feet,>let '
<br />out for p r that oould be used by the Colorado Basin users ,to supply shortages
<br />that might oour in ,tht ir irrigation use in years of extreme low run-off ,these
<br />shortages n being oaused by the transmountain diversion.
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<br />The t 0.1 estimated oost of the dam and reservoir is $3,776,032, $2,216,032
<br />of whioh wi 1 be paid for trom power revenues.
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<br />GRA.NBY RESERVOIR A.ND STORA,GE
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<br />The st rage of Colorado River waters' for the projeot is to be made in,wh/l,t
<br />is known as Granby Reservoir whioh is located in TpS. 2 and 3 N" Rs. 75 a~
<br />76 W" sixt prinoipal meridian, in Grand C9unty, Colorado. The reservoir basin
<br />oooupies th valleys of Stillwater Creek, the south fork or Arapaho Creek. and
<br />the main Co orado River.
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