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<br />SOUTH PLATTE BASIN
<br />
<br />Jun-01
<br />
<br />..
<br />
<br />Basinwide Conditions.Assessment
<br />The SWSI value of 2.3 indicates that for May the
<br />basin water supplies were above normal. Reservoir storage,
<br />the major component in this basin in computing the SWSI
<br />value, was 91 % of normal as of the end of May, Cumulative
<br />storage in the major plains reservoirs: Julesberg, North
<br />Sterling, and Prewitt, is at 99% of capacity, Cumulative
<br />storage in the major upper-basin reservoirs: Cheesman,
<br />Eleven Mile, Spinney, and Antero is at 92% of capacity, The
<br />Natural Resources Conservation Service reports that June 1
<br />snowpack is 22% of normal. Flow at the gaging station
<br />South Platte River near Kersey was 1,257 cfs, as compared
<br />to the iong-term average of 2,609 cfs, Flow at the
<br />Colorado/Nebraska state line averaged 587 cfs,
<br />
<br />Outlook
<br />Use for recharge and reservoir storage began to be
<br />replaced by direct flow irrigation demand in May, A storm
<br />early in May, the beginning of runoff and limited demand,
<br />kept the mainstem call junior during the month, The senior
<br />call in May was a North Sterling direct call toward the end of
<br />the month, By the end of the month, the call was back to a
<br />recharge call. Conditions allowed for significant recharge to
<br />occur during most of May.
<br />
<br />Administrative/Manaqement Concerns
<br />Snowpack returned to below average in May though
<br />it is difficult to determine the accuracy of snowpack numbers
<br />. very late in the year, We are unsure how good the runoff will
<br />be this year though there does seem to be good snowpack
<br />in the Clear Creek basin, a basin which often supports
<br />diversions in the river between Denver and Kersey until the
<br />end of June. Runoff will be dependent on conditions the
<br />next few' weeks including rainstorm precipitation that is
<br />sometimes severe in June. Runoff and rainstorm in June
<br />often deiay the call until toward the end of the month, The
<br />main stem reservoirs are full going into June helping to
<br />assure the supply for this summer for irrigators, Municipal
<br />suppliers generally have adequate supplies going into this
<br />summer.
<br />
<br />Public Use Impacts
<br />None,
<br />
<br />SCUTH RATTEMSlNsv,s HSTCRY
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<br />SOUTH PlATTE RIVER NR KERSEY, FLON BY WATER YEA,R
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<br />REPRESENTATIVE RESERVOIRS
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<br />Dillon Hoisetooth Eleven Mile Cheesman Jackson Barr Lake
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<br />-A\1J. 05131 Contents
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<br />IilI05J31J01 Contents
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<br />3
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