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COLORADO <br /> A WATER SUPPLY CONDITIONS UPDATE <br /> ROM THE OFFICE OF THE STATE ENGINEER; COLORADO DIVISION OF WATER RESOURCES September 1995 <br /> ROOM 818,1313 SHERMAN ST.,DENVER,CO 80203; (303)-866-3581 <br /> Water supplies remained above average throughout the state during August,as evidenced by the positive SWSI values <br /> in all basins. River flows were high, a continuing effect of this year's delayed runoff and generous contributions to the <br /> ground water table earlier in the summer. Reservoirs ended August with generally above normal storage levels as a result <br /> of reduced demand for their waters. August's temperatures warmed up compared to early summer,and the National Weather <br /> Service reports statewide precipitation was 80% of average. <br /> The Surface Water Supply Index (SWSI) developed by this office and the U.S.D.A. Natural Resources Conservation <br /> Service is used as an indicator of mountain based water supply conditions in the major river basins of the state. It is based <br /> on stream flow, reservoir storage, and precipitation for the summer period (May through October). During the summer <br /> period stream flow is the primary component in all basins except the South Platte basin where reservoir storage is given the <br /> most weight. The following SWSI values were computed for each of the seven major basins for September 1, 1995 and <br /> reflect conditions during the month of August. <br /> September 1, 1995 Change From Change From <br /> Basin SWSI Value Previous Month Previous Year <br /> South Platte +3.1 -0.3 +1.3 <br /> Arkansas +2.8 -0.7 +3.1 <br /> Rio Grande +2.7 -0.8 +4.6 <br /> Gunnison +3.4 +0.4 +5.9 <br /> Colorado +3.8 +0.3 +6.1 <br /> Yampa/White +1.6 -2.1 +5.2 <br /> San Juan/Dolores +3.3 -0.2 +5.8 <br /> SCALE <br /> -4 -3 -2 -1 0 +1 +2 +3 +4 <br /> Severe Moderate Near Normal Above Normal Abundant <br /> Drought Drought Supply Supply Supply <br /> • <br />