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• COLORADO BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -1.9 indicates that the basin SURFACE WATER SUPPLY I NOEX <br /> currently is in a moderate drought stage. Precipitation for S C°'orid° °I•'" <br /> the month of August was 62% of normal. Tributary flow is 4 <br /> critically low with conditions being worst west and south of w i;iII <br /> , 1 <br /> Glenwood Springs. Three Mile Creek near Glenwood Springs ill in] I <br /> III 111111 <br /> is experiencing an unprecedented no flow condition. At the 2 i <br /> III 111111, 1, I <br /> I nl 1111111 1111 hi 1 <br /> current release rate, there is onl 20-30 da of story e 1 un, 1 1I1111 1111 Ill 1 <br /> y g ' I IIII'' I 1111111 I 1111 11111111 <br /> III 11111 I 1111111 111111 111111 11 ,i , <br /> remaining in the West Slope Users Pool. Cumulative flow at }� p 1111 11111 d 1 1111111 1 11111 111111 1 11 II 1 <br /> II 1I 1 Il I jjlll 1 111:11 11111 <br /> the key gaging station, Colorado River near Dotsero, is 11 11 I,1, 1.11 iiiii <br /> approximately 40%below normal for the water year and only ,.. , 11 1;11 ; 1,;1! I;1 <br /> about 15% above the minimum flow recorded in 1977. o "' , ; '' <br /> Granby Reservoir is filling slowly but is relatively low. Dillon -3 <br /> Reservoir, Williams Fork Reservoir, and Ruedi Reservoir -4 ..._.. _... <br /> JAM/, JAIA2 .NO3 .W 4 -WAS .MINI .MIg7 JA"M -was JMNR JAIA1 <br /> remain full while other storage facilities in the basin are ,I <br /> extremely low. Soil moisture conditions remain critically low <br /> throughout the basin as evidenced by the negative values <br /> computed by the Palmer Drought Index. <br /> Outlook: COLORADO RIVER NR. DOTSERO <br /> The Colorado River mainstream should have adequate 3.2 FLOW BY RA' ''E R <br /> water supplies available through the remainder of the <br /> irrigation season. Shortages will continue in the Grand Mesa 2.8 <br /> and Grand Valley areas. The Granby Reservoir water level 1 2'2 <br /> .4 <br /> P/'''''Ar''''-- ' <br /> will increase slightly but will drop later in the year as i2 <br /> � <br /> pumping to the Adams Tunnel increases. ^- 1.8 <br /> 8 1.I <br /> Administrative/Management Concerns: 1.2 <br /> A "river call" was placed on the Colorado River on i 03 ------ <br /> July 27, 1990, to satisfy the Shoshone Power Plant right. On �r <br /> July 30, 1990, the "Cameo call" was placed on the Colorado 0.4 _ _ _ _ <br /> River. Decreasing flow in the Colorado River has placed a <br /> oce Ma RAC .an Feb Web April M1Y Are JuIY A03 Wit <br /> strong demand on storage releases from Green Mountain „ <br /> Reservoir to augment flow. a HIQI(19.4) • LOW(1177) o MG • MO <br /> Public Use Impacts: <br /> Since August 15, storage release of 60-90 cfs have <br /> been made from Ruedi Reservoir to the 15 mile stretch below Co I orado River Bas I n Reservoir Supplies <br /> the Grand Valley Canal for the endangered fish species in ,40 <br /> that area. This effectively increases flows in the Fryingpan 130-� <br /> and Roaring Fork Rivers. Vega Reservoir is extremely low. "° <br /> „R <br /> Rifle Gap Reservoir level is below the boat ramp. 1 ,33 <br /> 11^ :',///5// \:\\\ <br /> Sc, <br /> 7"/ \ N <br /> i 4°,////\\ <br /> /\ ' 7\ <br /> 30 <br /> 20 Z\ <br /> , .../.., <br /> /\ <br /> .....Mountain AWN Will ISM Fork <br /> ® Avg.11/31 CCntNK, ® 6/3VI0 pontmnta <br /> 7 <br />