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GUNNISON BASIN <br /> ,. <br /> SURFACE WATER SUPPLY INDEX <br /> 0umison River Basin <br /> 3 P <br /> Basinwide Conditions Assessment: 4- <br /> The SWSI value of +0.2 indicates that the basin $ _ <br /> water supply is normal. Snowpack measured 85%of normal 3- 1 <br /> on January..1, 1991. Precipitation for the month of 2- ,: .' T -- a.►;: 7�; ' J <br /> December was 60% of normal, but for the water year is 1- L r` T.. -%-• , •7 <br /> 109% of normal. Basinwide reservoir storage is 128% of o ,4--1 - -o j,. <br /> normal, as measured on January 1, 1991. Blue Mesa -1 ,; I <br /> Reservoir contents measured 648,900 acre-feet on January 1, ,. '`' - _ <br /> 1991. Taylor Park Reservoir contents measured 78,000 acre- o -2- ,- <br /> feet on January 1, 1991. Overall, streamflow was slightly -3- <br /> above normal for the month throughout the basin. Flow at -4 r,..m <br /> JAN81 JAN82 JAN83 JAN84 JAN8JAMB <br /> JANBB JANB7 JAB JANB9 JAN90 JAN91 <br /> the key gaging station, Uncompaghre River near Ridgway, 1,0111•1 17 <br /> EAFI <br /> averaged 58 cfs for the month as compared to the historic <br /> monthly flow of 55 cfs. <br /> Outlook: <br /> Much of the snowmelt in the basin can be expected <br /> to percolate into the ground to restore soil moisture and UNCOMPAHGRE RIVER NR, R I DGWAY <br /> ground water. The past three years of drought have 24 FLOW Erf YEAR <br /> seriously depleted ground water in storage as observed by 22 _ <br /> diminished flow of springs. The streamflow forecast is lowest 21 <br /> 20 <br /> in the North Fork of the Gunnison River drainage above :>,,,,,,,_,,....____„,..1179,,,,,v,7 <br /> Sommerset at 73% of average and highest in the East Fork + �6 . <br /> • River drainage above Almont at 91% of average. 2 11,11 3 <br /> ic� . <br /> TI- 12 <br /> Administrative/Management Concerns: <br /> Reservoirs are utilizing sensor storage rights with the <br /> exception of municipal water decrees which are primarily 7 <br /> junior. _ <br /> 5 <br /> 4 <br /> 3 <br /> Public Use.Impacts: 10,1114 <br /> °� .— Jar. Feb wren <br /> Water-based recreation has been sustained at Blue *""(1984) + DRY YEAR(1977) o AVG 4, 199 <br /> Mesa Reservoir and in the Gunnison River below the <br /> Gunnison River Basin Reservoir Supplies Gunnison River Basin Reservoir Supplies <br /> 80 - 700 y <br /> _ <br /> 70- 600-SBBf� i <br /> 11 40 \:, <br /> gg <br /> 0 30 ai 3� <br /> g /\ <br /> 2,3 i MO <br /> • <br /> 10 100 <br /> , "\-\NI 0 A / <br /> Taylor Par1C 78Kar0 PrultIWAG BLUE LESA 12/31 AwG BLUE AAES4 12/31/90 <br /> ® Avg. 12/31 Contsnta ® 12/31/20 Cantsnts • <br /> reservoir. Telluride ski area received good early snowpack. <br /> 6 <br />