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SO=PLATTE BASIN ` August, 1998 <br /> i <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.0 indicates that for July the basin SOUTH PLATTE RIVER BASIN <br /> water supplies were above normal. Reservoir storage, the s - w.f...rrt.r SYppIy Ind.x HIAWY <br /> major component in this basin in computing the SWSI value, ,_ • <br /> was 98% of normal as of the end of July. Storage in the in 3_ .i <br /> majorplains reservoirs:Julesburg, Sterling,and Prewitt ' <br /> J g� g> <br /> decreased by 31,810 acre-feet during July and are at 72% of 2-•I" _ 7. i <br /> capacity. Storage in the major upper basin reservoirs: 1- <br /> Cheesman, Eleven Mile, Spinney, and Antero, increased by j a t 1- F. <br /> 15,432 acre-feet and are at 98%of capacity. The mean daily _ T;� t4 <br /> flow of the South Plane River at the Kersey gage was 901 cfs, ,. _ <br /> as compared to the long term average of 1,107 cfs. Flow at o -2 <br /> the Colorado/Nebraska state line averaged 316 cfs. -3- <br /> Flows in the South Plane and its tributaries were -;., ........ ..._., . . — -.-� <br /> "ANEW JAN90 JAN91 JAN92 JAN93 JAN94 .WAS JAN9C JAN97 JAN98 <br /> average or above average through out the basin during July. MONTWYEAR <br /> The most senior call on the South Platte during the month <br /> was an 1873 Lupton Bottom Ditch call in District 2 on July <br /> 22. In general, the calls through out the basin were not as <br /> senior as normal in July. <br /> Widespread rainstorms toward the end of the month SOUTH PLATTE RIVER NR. KERSEY <br /> returned the South Platte to flows which normally exist only 2.• FLOW BY WATER YEAR T - <br /> during runoff. These rainstorms completely removed the call 2•6 <br /> 2.4 <br /> on the whole main stem the last week of July. It is expected <br /> 2.2 <br /> the call will return by the second week of August if weather <br /> conditions return to seasonal norms. a ,..•r., 1.8 <br /> 1.y Outlook <br /> LL <br /> Due to the good natural flow conditions, most of the - <br /> irrigation and municipal reservoirs were still near full or were " <br /> being refilled by the end of the month. Thus, there should - <br /> not be any significant water shortages along the South Platte 0.2 <br /> or any of its tributaries this year. ° E <br /> Oct Nov Oec Jan Feb Mrch Aprll Myr June July AUQ Sept <br /> MOUTH <br /> 0 WET(190) o ORY Ogee) a AVG X 1268 <br /> REPRESENTATIVE RESERVOIRS <br /> SOUTH PLATTE RIVER BASIN <br /> 263 <br /> 240 <br /> no� <br /> .. .A., <br /> .! ...0_7 <br /> ii, . /N.\ <br /> .1 .0_,/,, ,,.. <br /> N -_-R 7 <br /> I so <br /> 0111on Ibr..tooth Eleven Mlle Cluesnen Jackson Baer Lek, <br /> ® Avg. 7/E1 Content. ® 7/31/90 Contents <br /> • <br />