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• <br /> • <br /> SOUTH PLATTE BASIN <br /> Basinwide Conditions Assessment: <br /> SURFACE WATER SUPPLY INDEX <br /> The SWSI value of +1.4 indicates the current S South Platte River Basin <br /> onditions are above normal. This is the highest value 4- • <br /> recorded in the state. The northern tributaries including the 3_ . . - <br /> Cache la Poudre, St. Vrain, Big Thompson, and Boulder - ;-17 <br /> w ' <br /> Creek have i adequate supplies of water while the southern 2- - • . <br /> tributaries ncluding the South Park and Tanyadrainages 4- — - - 4 <br /> 1111011 <br /> have less than adequate supplies. Rains effectively reduced a , N <br /> '001 <br /> irrigation demands along the mainstream of the South Platte <br /> River improving flows and storage in the plains reservoirs. Q -2- <br /> Cumulative flow at the key gaging station, South Platte <br /> River near Kersey, remains 30% below normal for the -3 <br /> current water year, but still remain above the minimum <br /> 4V4O1 JAN12 JAINn JANN ..U1KS awn JANn7 J.JI1 JAN50 JNi0 JAN01 <br /> flow recorded in 1964. Dillon Reservoir is currently storing <br /> about 250,000 acre-feet of usable water. Soil moisture is <br /> classified as being above normal. <br /> Outlook: <br /> The 30-90 day outlook is favorable . Irrigation <br /> demands are likely to remain below normal in August. <br /> Municipal��� water supplies from the upper South Platte basin SOUTH PLATTE RIVER NR. KERSEY <br /> • BY SA <br /> will be short. 2.0 aat� M YEAR <br /> 2.1- JD <br /> Administrative/Management Concerns: <br /> 2.2 <br /> Water rights administration is operating in a normal I 2 <br /> manner. "River calls" are being regularly adjusted to minor <br /> changes in supply and demand. The Colorado-Big '.° <br /> Thompson Project will go through the year on a 50% quota. -_ <br /> The greatest impact is on the North Poudre Irrigation 4 <br /> District which will have to lease water to maintain operating <br /> 0.8 <br /> levels. 0. <br /> 0.4 <br /> 0.2 <br /> Public Use Impacts: <br /> Ott NW DeC Jen Fob 'Arch Ar l I imy Jun. .Ill ly Aug Slot <br /> Public water use should be relativley normal. ACINTI, <br /> Cherry Creek Reservoir will continue to lower due to 1012"""' '904 CHIN) AVG. 1990 <br /> evaporation losses. Reservoir releases above Denver and <br /> municipal and irrigation return flows will keep streamflows <br /> in the South Platte River at acceptable levels. • <br /> South Platte Basin Reservoir Supplies <br /> 200 <br /> 240 <br /> 2zo�\\` <br /> zaD <br /> ,9D- <br /> tr, 103-.rA <br /> 140 <br /> 120 <br /> iE <br /> -/A <br /> DI ton Ib-!lt9Oth Eleven HI I• CMlrlrn Jackson Barr Loco <br /> ® Avg.7/31 Content! ® 7/31190 Content! <br /> 3 <br />