DWR_4151757 - Laserfiche WebLink

e I COLORADO BASIN Basinwide Conditions Assessment: The SWSI value of +3.3 indicates that for April the COLORADO RIVER BASIN basin water supplies were well above normal. The Soil Surface Water Supply Index History� .I Conservation Service reports April 30 snowpack at 151% of 4 1 _ _ normal. Storage in Green Mountain, Ruedi, and Williams F i . 9_, Fork reservoirs totaled 118% of normal on April 30. The ' National Weather Service reports April precipitation at 140% =� L of normal. Flow at the gaging station, Colorado River near Y Dotsero, averaged 1,527 cfs as compared to the 1961-1991 i O I c1317 ",,0 _-? _ _v- April average of 1,831 cfs. - -, (1 a: - Outlook 0 ` f The month of April brought above average -3 precipitation and below normal temperatures. This has -4 JANB4 JANBS JAMB JANB7 JANBB JAN89 JAN90 JAN91 JAN92 JAN93 increased snowpack amounts substantially and increased thew.. chance of high spring runoff and floods. most areas are showing snowpack amounts of 130%to 150%of normal with the Fryingpan and Crystal rivers hitting around 200% of normal. Some of the sites around 9000 feet, which are usually starting to melt by now, show very little reduction in COLORADO RIVER NR. DOTSEPO water. The longer the weather stays cool, the higher the 700 FLOW BY W"TER YEAR runoff will be in June when the weather does get warm. Flooding is certainly a possibility this season. • KO • 500 /////: Administrative/Management Concerns ¢4 The 1,250 cfs (1-17-1902) call for the Shoshone §! 400 Hydroelectric Power Plant in Glenwood Canyon was reduced 2 i 3� to the 158 cfs call (5-15-1929) on April 14 and was totally -"s removed on April 21. This call, along with the Cameo call, 1 2O0 will likely not be reinstated until sometime in August. Most 100 reservoirs except Granby will be able to fill fairly easily this spring and summer. Granby Reservoir last filled in 1985,and Oct NDY O.c Jan Feb March Jor1I estimates are that it will fill within 4 feet of the spillway this MONTH CI MET(1aM) O DRY C 1077) a A"G x 1903 year. Some reservoirs, such as Ruedi, Green Mountain, and Williams Fork, are being lowered to make room for the high runoff. Some water users, which are usually wanting more runoff, are worried about the possibility of flooding this year. Dam safety issues are being addressed due to the high runoff REPRESENTATIVE RESERVOIRS potential, and dam owners are being advised to be sure 70 COLORADO RI"E' '" spillways are clear of snow and other debris. Public Use Impacts 1 s°_ flooding headgates,head atesponds, building s, ect. is the 40Z. main concern for irrigators and land owners. On the other / hand,the rafters and kayakers are excited about the possibility l t, 3°iv?' \\\\ /\ of high flows. The Squaw Fish on the lower Colorado River will certainly be happy with the high muddy flows. 3 20_1/4/7\ 10 Grwn Mount.In Fi*di Mi l l iams fork ® Avq.4130 content. ES 4J30,13 contents • 7