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<br />SOUTH PLATTE BASIN <br /> <br />Basinwide Conditions Assessment <br />The SWSI value for the month was +1.1. <br />Cumulative storage for the six reservoirs graphed on this <br />page was 112% of normal as of the end of March. <br />Cumulative storage in the major plains reservoirs: <br />Julesberg, North Sterling, and Prewitt, is at 100% of <br />capacity. Cumulative storage in the major upper-basin <br />reservoirs: Cheesman, Eleven Mile, Spinney, and Antero is <br />at 95% of capacity. The Natural Resources Conservation <br />Service reports that April 1 snowpack is 108% of normal. <br />Flow at the gaging station South Platte River near Kersey <br />was 663 cfs, as compared to the long-term average of 684 <br />cfs. Flow at the Colorado/Nebraska state line averaged 100 <br />cfs. <br /> <br />Outlook <br />The primary diversions in March continued to be for <br />storage. By the end of the month, all of the major reservoirs <br />on the South Platte had finished filling. This allowed for a <br />change in call to recharge by the end of the month. <br />Recharge should help well user groups in providing <br />augmentation to replace well pumping depletions. Snowpack <br />is slightly above average for the basin with far above average <br />snowpack in the southern part of the basin. With this <br />snowpack, it appears we will have at least average runoff. <br />The concern right now has been the fairly dry conditions on <br />the plains. With these conditions, irrigation users may need <br />to divert water to initially bring up their crops prior to higher <br />flows in the spring. Thus, we could see calls for irrigation in <br />the next two weeks unless we get rainfall. Shortages of <br />direct flow water may require the use of reservoir supplies <br />depleting those available for later in the summer. One or two <br />well timed wide spread rainstorms would significantly assist <br />in assuring this is a good water year for irrigation users. <br />Supply conditions for municipal users are in good shape for <br />this time of year with in-basin reservoir levels near full for <br />most users and good supplies appearing to be available from <br />transbasin sources. <br /> <br />Apr-08 <br /> <br />SOJTH Pl.ATlE I?ASIN S/lS HSTCRY <br /> <br /> <br />>- <br />w <br />'" <br /> <br />w <br />:3 <br />"' <br />5 0 <br />o <br />;:: <br />>-.1 <br />'" <br />o <br /> <br />Jm-99 Jan-OO Jan-01 Jm-02 Jan-03 Jan-04 Jm-05 Jan-03 Jm-07 Jan-OO <br />M:N1H/\S'R <br /> <br />SOUfH PlATTE RIVER NR KERSEY, FLOW BY WATER YEAR <br /> <br />450, CXXJ <br /> <br /> <br />4OJ, CXXJ <br /> <br />1D <br />,f 350,CXXJ <br />dJ <br />.'{ 3OJ, CXXJ <br />~ <br />S 250, CXXJ <br />LL <br />~ 2OJ, CXXJ <br />>= <br />~ 15O,CXXJ <br />::;; <br />(3 100,CXXJ <br /> <br />50, CXXJ <br /> <br />o <br />Cct <br /> <br />Nov <br /> <br />Dee <br /> <br />Jan <br /> <br />Feb <br /> <br />M3rch <br /> <br />--8- V\ET (1983) <br /> <br />-+- DRY (1934) <br /> <br />~AVG <br /> <br />"*- 2008 <br /> <br />REPRESENT A TlVE RESERVOI RS <br /> <br />250.00J <br /> <br /> <br />2OO.00J <br /> <br />1D <br />2 <br />dJ <br />~ 150,(0) <br /><Ii <br />OJ <br />ro <br />o <br /> <br />~ 100,(0) <br />:0 <br />ro <br /><f> <br />::J <br /> <br />5O.00J <br /> <br />Dillon Horsetooth Eleven Mile Cheesman Jackson Barr Lake <br /> <br />II Avg. 3131 Contents <br /> <br />113131/08 Contents <br /> <br />:3 <br />