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• <br /> Gunnison River Basin Reservoir Supplies Gunnison River Basin Reservoir Supplies <br /> Tao eta <br /> SCID <br /> A^\\ <br /> i~ boo' //\I so <br /> boo so <br /> lam:////////: <br /> ao/..\\ <br /> ,aa- <br /> Clue Mama Taylor Pent CraMero Fruitland <br /> ® Avg.eroo Contents ® {/30/90 Contents ® Avg.i/30°entente ® a/30/e0 Contents <br /> COLORADO <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-2.1 indicates below normal to moderate drought conditions. Rain in early July has resulted in <br /> improved conditions, but shortages will continue. The Colorado River below Glenwood Springs peaked on June 11, 1990 <br /> at 9,750 cfs as compared to the low peak of 4,830 cfs on June 7, 1977, and the high peak of 31,500 cfs on May 25, <br /> 1984. Cumulative flow at the key index gaging station, Colorado River near Dotsero, remains at approximately 35% <br /> below normal. Tributary inflow below Glenwood Springs is extremely low. <br /> Outlook: <br /> With average to above average storage in Reudi Reservoir and Green Mountain Reservoir, adequate water supplies <br /> will remain for users along the Colorado River mainstem, the Roaring Fork, the Eagle River, and the Blue River. All <br /> other tributaries will experience moderate to severe shortages with the worst conditions in the Grand Mesa and Grand <br /> Valley sectors. Even if precipitation continues above normal throughout the remainder of the summer months, shortages <br /> will exist in these areas. <br /> Administrative/Management Concerns: <br /> A"river call" is expected to be placed by the Shoshone Power Plant by mid-July with a call at Cameo for the Grand <br /> Valley rights by late July. The Cameo call is expected to remain in effect through November 1, 1990. The Colorado <br /> River Interstate Compact will be met without having to curtail Colorado users. The Bureau of Reclamation has developed <br /> a set of drought management response plans relative to operations of the Collbran and Vega Projects. The plan involves <br /> using only the Upper Molina Power Plant, while releasing tailrace flows into the South Side Canal. This will help to <br /> alleviate some of the shortages in one of the Division's most impacted water districts. Vega Reservoir did not receive <br /> any project water and is allocating for 40% based on the power exchange. <br /> Public Use Impacts: <br /> Rifle Gap Reservoir will be heavily impacted for both recreational and irrigation uses with the water level expected <br /> to drop to the bottom of active storage in late summer. <br /> 7 <br />