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6 <br /> 4 SOUTH PLATTE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.5 indicates that for January the SOUTH PLATTE RIVER BASIN <br /> asin water supplies were well above normal. Reservoir•« _« spry Index Hfctory <br /> 5 <br /> storage,the major component in this basin in computing the 'J <br /> SWSI value, was 118% of normal as of the end of January. - <br /> Storage in the major plains reservoirs, Julesburg, North 3 _ J. �--- <br /> Sterling, and Prewitt, increased by 15,952 acre-feet during 2 '-- •1 µ` = <br /> January and are at 84% of capacity. Storage in the major 1 ' — w . E - <br /> u er basin reservoirs, Cheesman, Eleven Mile, Spinney, and 1 o = --e- i— <br /> PP _ 4 <br /> Antero, decreased by 5,737 acre-feet and are at 89% of _ J <br /> capacity. The Natural Resources Conservation Service reports . -= <br /> x _2_ <br /> February 1 snowpack as 150% of normal. The mean daily <br /> flow of the South Platte River at the Kersey gage was 844 cfs, "3- <br /> as compared to the 1961-1993 average of 774 cfs. Flow at the -4 <br /> JAN87 JAN811 JANB9 JAN90 JAN81 JAN92 JAN93 JAN94 JA1.95 JAGS <br /> Colorado/Nebraska state line averaged 661 cfs. MONTH/YEAR <br /> Stream flow conditions were above normal for this <br /> time of year. The only call on the South Platte was for <br /> storage upstream of Denver. Diversions in January continued <br /> primarily for storage, recharge, and for direct municipal use. . <br /> Most diversions for recharge and reservoir storage were shut SOUTH PLATTE RIVER NR. KERSEY <br /> off toward the and of the month due to the cold weather. The 450 FLOW BY WATER YEAR <br /> majority of reservoirs have reached their winter storage levels. 400 <br /> Overall, storage very good, and conditions are in far better 95O <br /> shape than last year. <br /> .----------/ <br /> 300 <br /> Outlook I 250 <br /> Significant snowfall during the month sent the µ 200 <br /> V <br /> snowpack far above average for this time of year throughout 5 150 <br /> the basin. Based on present conditions,it continues to appear <br /> 100 <br /> that there will be a more than adequate supply next year. <br /> 50 <br /> Administrative/Management Concerns 0 I <br /> OCt Nov Dec Jen Feb Merah <br /> The cold weather has caused icing conditions in the MONTH <br /> p WET C11183) 0 OPT C1964) A AVG X 1996 <br /> rivers which result in localized flooding. While it is too early <br /> to project, the higher snowpack and possible return flow <br /> conditions may present the potential for flooding problems <br /> this spring. This will depend on snowpack conditions later in <br /> spring and on the amount of spring rain. REPRESENTATIVE RESERVOIRS <br /> A group has been formed with funding from the 260 SOUTH PLATTE BASIN SUPPLY <br /> Colorado Water Conservation Board and several other entities 240- <br /> to look at possible recharge projects on the lower end of the 220- <br /> 200 72\ <br /> South Platte River. This group has had organizational and i 180—// <br /> 4 <br /> scoping meetings the last two months. t„ 1so f <br /> r <br /> 140 <br /> 0 y <br /> S 120 <br /> so •//�.� <br /> /7 <br /> 01 Ion Hx-setooth Eleven NI le Chseceen JOCkcon eery Lake <br /> ® Avg. 1/31 Contents ® 1/31/96 Contents <br /> 3 <br />