Laserfiche WebLink
• <br /> COLORADO BASIN <br /> • <br /> SURFACE WATER SUPPLY fNDEX <br /> Colorado RIver Rahn <br /> s _ <br /> Basinwide Conditions Assessment:The SWSI value of-0.3 indicates that the basin water _ <br /> = <br /> supply is near normal. Snowpack measured 76% of normal 3- p a' , <br /> on January 1, 1991. Precipitation for the month of 2- ' : <br /> December was 86% of normal, but is 110% for the water - ,- • <br /> year. - Flow at the key gaging station, Colorado River near ° f)i <br /> Dotsero, averaged 675 cfs as compared to the historic _ - t� 1 � <br /> monthly average of 1026 cfs. Base flows are critically low in <br /> tributaries to the Colorado River due to colder than normal o -2- <br /> December temperatures and resulting low snowpack runoff. -3, • <br /> Basinwide reservoir storage was 87% of normal on January <br /> JANe1 JAN63 J'AW3 JAN44 JAWS JANBG JAW7 JAN118 JMNN JAN90 JAN91 <br /> 1, 1991. Dillon Reservoir, Williams Fork Reservoir, and MONTH,YEAR <br /> Ruedi Reservoir are at near normal storage levels. Vega <br /> Reservoir, Rifle Gap Reservoir, Green Mountain Reservoir, <br /> and Granby Reservoir have storage contents well below <br /> normal. With normal to above normal runoff, these <br /> reservoirs will fill in the spring of 1991. The exceptions are <br /> Green Mountain Reservoir and Granby Reservoir. Green COLORADO RIVER NR. DOTSERO <br /> Mountain Reservoir ended the irrigation season with 64,340 500 F 8Y WATER YEAR <br /> acre-feet of useable contents of which only 3,000 acre-feet <br /> is in the historic users pool. The remainder is in the <br /> Colorado Big Thompson project pool and the West Slope 400 <br /> contract pool. 350 <br /> Outlook: <br /> 4 no <br /> Snowpack is likely to be low going into the 1991 <br /> runoff season unless significantly above normal snowfall is <br /> received in the January-April period. Streamflow forecast is 150 <br /> • lowest in the Williams Fork drainage above Williams Fork 1a0 <br /> Reservoir at 63% of average and highest in the East Fork of so <br /> Troublesome Creek drainage at 103% of average. Dec Jan F°° mrcn <br /> mpraH <br /> WET YEAR(1984) + ORY YEAR 0977) o AVG A 199 <br /> Administrative/Management Concerns: - <br /> The ttDotsero" call (January 7, 1902 decree) to satisfy <br /> the Shoshone Hydroelectric Power Plant water right,of 1250 <br /> cfs, will be on throughout the winter. Colorado River Basin Reservoir Supplies <br /> 9a <br /> Public Use Impacts: 90 <br /> Snowmaking is playing an increasing role in winter <br /> water use demands. These demands compete with the needs <br /> of hydroelectric power, municipalities, stock watering, 60 <br /> storage, and maintaining minimum stream flows. 111 <br /> Snowmaking rights are typically junior except in the case of 40 <br /> _:://\\\ <br /> minimum stream flows. This water use during low flow <br /> 3a <br /> periods is a major concern relative to impacts on stream <br /> ./../\\ <br /> fisheries. 20 /\\ <br /> m <br /> .//\\ <br /> • Croon mountain Rueg i Wit I l ug Fork <br /> ® Avg. 12/31 Contents ® 12/31/90 Contents <br /> 7 <br />