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GUNNISON BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of+1.1 indicates that the basin water SURFACE WATER SUPPLY INDEX <br /> supply is above normal. Snowpack measured 60%of average 5 Gunnison Sliver Basin <br /> on June 1. Precipitation for the month was 56% of average 4_ <br /> but is 109% of average for the water year. Basinwide LU 3- p" _1 <br /> reservoir storage is 144% of average. Blue Mesa Reservoir J. _ -, J <br /> contents (usable) measured 770,080 acre-feet. Water storage : �--; , <br /> J. <br /> in Blue Mesa Reservoir is high because the Bureau of =": = ;= <br /> Reclamation has not had a need to release water for i Q ,'��`—•' /- • ' ,o�t. , <br /> lif <br /> hydroelectric power generation. The amount of water in this I1.r 1 <br /> reservoir has little meaning relative to the water supplies z_ 4., <br /> available within the basin for uses other than power o "-' <br /> generation. Taylor Park Reservoir contents(usable)measured "3- <br /> 72,500 acre-feet. Overall,streamflow was near normal for the , , .... .... . . ....--_. <br /> JAN62 JANe3 JAN64 JAMBS JAli6 J0167 JANSI JANOS JANfiO JANY1 <br /> month throughout the basin. Flow at the key index gaging IbN,►IYSti1 <br /> station, Uncompahgre River near Ridgway, averaged 116 cfs <br /> for the month as compared to the historic monthly flow of 89 <br /> cfs. The Bureau of Reclamation is releasing water from both <br /> Ridgway Reservoir and Paonia Reservoir to provide for <br /> additional storage. This is expected to pull some of the peak UNCOMPAHGRE RIVER NR. R I DGWAY <br /> runoff from those streams below the reservoirs. Kay BY WATER YEAR <br /> 190 <br /> Outlook: 160 <br /> ,fiQ <br /> The water supply for the basin is reasonably good. , ;o <br /> Irrigation demands were low throughout May due to cooler 4 � �,�- <br /> than normal conditions. The runoff has also been delayed by t..1 ;,0 <br /> cold temperatures. The streamflow forecast is lowest in thema <br /> g so <br /> River near Grand Junction at just 58% of average " <br /> 70 <br /> and highest in the Surface Creek drainage at 80%of average. I 60 <br /> The streamflow forecast on the Gunnison River mainstem30 <br /> above Blue Mesa is 78% of average. Drainages with high niQ <br /> elevation snowpack with north and east facing slopes will 0 <br /> Oct Nov OK Jan fob Birch Apri I Bey June July Aug Sept <br /> have increased flow from runoff during June. ICOITH <br /> 0 WET(1884) ♦ CRY(18777 a AVG • 1811 <br /> Administrative/Management Concerns: <br /> It is expected that there will be some administration <br /> needed between surface water rights and reservoir storage <br /> rights on the south side of the Grand Mesa. Gunn i son River Basin Reservoir Supplies <br /> so <br /> Public Use Impacts: 70- <br /> Water-based recreation will be sustained at Blue Mesa 7,7 <br /> Reservoir and in the Gunnison River below the reservoir. i °°�� <br /> \\ <br /> i i 4°-s //.\\ <br /> Is <br /> Olt; i///7\s ,\,, <br /> . 30 <br /> 8 <br /> 8 zo <br /> 10 <br /> 0 /\ M /77//\\.\.,‘,,,i <br /> Taylor Park Crawford frultland <br /> __L_I Avg. 5/31 Contents ICI 5/31/S1 content. <br /> 6 <br />