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r <br /> BASIN ASSESSMENTS (Continued) <br /> Colorado <br /> The SWSI value of -2.5 represents a moderate decline from May 1, 1990. <br /> The streamflow component was significantly below normal for the month of May. <br /> This was primarily due to below normal temperatures for the month and a <br /> resultant delayed runoff. The runoff is expected to peak by mid to late <br /> June. The basinwide forecast is 65% of average ranging from 49% for the East <br /> Fork of Troublesome Creek to 81% for the Blue River above Dillon Reservoir. <br /> Flow for the key index gaging station, Colorado River near Dotsero, measured <br /> 1246 cfs on May 1, 1990, and 2708 cfs on June 1, 1990. Storage in Granby <br /> Reservoir was 188,920 acre-feet on June 1, 1990, as compared to 344,830 <br /> acre-feet on June 1, 1989, and 490,690 acre-feet on June 1, 1988. Current <br /> storage in Granby Reservoir is the lowest since April , 1979. <br /> Yampa/White <br /> The SWSI value of -3.8 represents a significant decline from May 1, 1990, <br /> and classifies the basin as being in a "severe drought." However, the <br /> Division 6 Engineer suggests that conditions are not that severe. The <br /> streamflow component was significantly below normal for the month of May. <br /> This was primarily due to below normal temperatures for the month and a <br /> resultant delayed runoff. The runoff is expected to peak by mid to late <br /> June. The basinwide runoff forecast is only 50% ranging from 37% for the <br /> Little Snake River to 79% for the North Platte River. Soil moisture <br /> conditions are normal and available supplies should be able to meet demand. <br /> Flow at the key index gaging station, White River near Boise, measured 297 cfs <br /> on May 1, 1990, and 934 cfs on June 1, 1990. <br /> San Juan/Dolores <br /> The SWSI value of -2.1 represents a slight decline from May 1, 1990. <br /> However, snowpack remaining on June 1, 1990, was only 34% of average. The <br /> basinwide runoff forecast is only 45% of average, ranging from 14% for the <br /> Mancos River to 75% for the Pine River above Vallecito. Flow for the key <br /> index gaging station, La Plata River near Hesperus, measured 36 cfs on May 1, <br /> 1990, and 49 cfs on June 1, 1990. Reservoir storage is expected to be <br /> severely depleted by late summer to meet irrigation demands. <br /> Forecasts provided by the Soil Conservation Service, Snow Survey Office <br /> (Denver) , U.S. Department of Agriculture. <br /> JRK/clf:1305I <br />