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<br /> <br />. <br /> <br />released for irrigation uses. The total carriage loss incurred by the <br />unit wouJ.d be 3,900 acre-feet per year as indicated below: <br /> <br />10% of the 33,100 acre-feet consolidation release <br />10% of the 6,100 acre-feet stored surplus release <br />Total carriage loss <br /> <br />3,300 af!yr <br />600 af~yr <br />3,900 af yr <br /> <br />The Total Ne1f Water S\.lIlpl.y Developed by the Unit <br /> <br />Table 7 summarizes the water supply to be developed by the storage <br />of surplus flows and the plains reservoir consolidation, capacity <br />replacement, and transfer. Of the tQi.~ay!1lrage annual of 40...800 acre- <br />.f~et__?!_.Il~__W!l,:tt:l!_<i,t:l.y~!()~d.EY j;he.Unit.,...16,.oOO..acre4eeUQYlQ...h(L., <br />avdlable . for municipal and industI'.:b?'.+tIflelS-,..@Q.M. ?v~ra&!_9t15, goo, <br />~cre;'1'ee'E -{af'ter-IossesL:woUJ.d be the. net irrigation. water. supply <br />available at the farm headgates. However, only 12,000 acre-feet of <br />'this supply, measured at the farm headgate, is considered salable in <br />this analysis due to difficuJ.ties in the association of the carriage <br />losses and increased diversion with the historical yield of the plains <br />storage rights. Estimating the carriage loss to be 10 percent', the <br />salable water at Grey Mountain Reservoir would be 13,300 acre-feet <br />per year. More detailed studies wouJ.d enable the unsalab1e 3,200 <br />acre.feet of new water to be identified as a yield of the unit or the <br />increased yields of the storage rights resuJ.ting ~om greater return <br />:t'1ows accruing from the expanded use of municipal and industrial water. <br /> <br />. <br /> <br />Associated HydrolOgy Functions <br /> <br />Flood--Inflow design flood studies for the reconnaissance inves- <br />tigations of Grey Mountain and Idylwilde Reservoir sites were prepared <br />by the Region 7 Hydr010gy Branch. These are summarized below: <br /> <br />Site <br />- <br /> <br />Peak Disch. (c.f.s.) <br /> <br />29,000 <br />136,000 <br /> <br />15-de.r V01ume (a.f.) <br /> <br />187,870 <br />409,030 <br /> <br />Idylwilde <br />Grey Mountain <br /> <br />Sedimentation:"-No detailed studies of' sedimentation in project <br />reservoirs were undertaken. Based on information contained in the <br />South Platte Basin Report of 1959, a dead and inactive pool of 20,000 <br />acre-feed is reconunended for Grey Mountain Reservoir to allOlf for <br />sediment in:t'1ow as well as to provide a minimum pool for recreation <br />and fish. No sediment storage space allocation is reconunended at <br />this time for the other project reservoirs. <br /> <br />. <br /> <br />Quality of water--Project effects on quality of water for both <br />municipal and irrigation supplies were not studied in detail. However, <br />the contro1 of surplus flows occurring during high stream flow periods <br /> <br />32 <br /> <br />- <br /> <br />