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GUNNISON BASIN <br /> a <br /> Basinwide Conditions Assessment: <br /> The SWSI value of+3.2 indicates that for August the GUNNISON RIVER BASIN <br /> Surface Water Supply Index Hf•tory <br /> basin water supplies were well above normal. Storage in 5 <br /> Taylor Park, Crawford, and Fruitland reservoirs totaled 103% 4 <br /> of normal on August 31. Flow at the gaging station W 3 <br /> Uncompahgre River near Ridgway averaged 375 cfs as e .) :i <br /> gw 2 � ,�.. <br /> compared to the 1961-1991 August average of 158 cfs. The M: <br /> National Weather Service reports August precipitation as 1 -..-- . .. <br /> 136% of normal. i -----1- 4, <br /> J <br /> Outlook f <br /> In the higher elevations ditches were turned off for -2 <br /> haying in early August. Due to rain in late August and early 3 <br /> September it is doubtful that may will turn back on. -4 <br /> JANS4 JAWS JAN66 JM97 JAN66 JANB9 JAN90 JAN91 JAN92 JAN93 <br /> Carryover reservoir storage is excellent. On Grand Mesa, M Y.R <br /> basin administrators anticipate a carryover storage of 50%of <br /> capacity, as compared to the 15%-20% carryover which has <br /> been experienced for the last 5 years. With this amount of <br /> carryover, it is expected to achieve a good fill of the reservoirs <br /> next year even with an average runoff. There is also good UNCOMPAHGRE RIVER NR. R I DGWAY <br /> FLOW BY WATER YEAR <br /> carryover storage in Blue Mesa and Ridgway reservoirs. 190 <br /> 160 <br /> 170 <br /> Administrative/Management Concerns 160 <br /> Water supply conditions are excellent in the basin. <br /> This is the season for irrigation demand to drop off 4 1120 <br /> 30 <br /> considerably in the lower elevations. As a result, the call has -! ,00 <br /> gone off most of the streams which went under administration g 90 10 - <br /> this year. The exception is the Cedaredge area where apples 5 >D <br /> 6D r <br /> are irrigated until mid or late September. sD f•- —' <br /> 40 <br /> 30 <br /> Public Use Impacts ;0 <br /> The 1993 water year was a very high runoff year due 0 <br /> Oct Nov Dec Jan Fob MUrCh Apr I May June July Aug Sept <br /> to the excellent snowpack. This allowed the Bureau of MMRH <br /> p WET C1994) o DRY(1877) O AVG X 1993 <br /> Reclamation to operate Blue Mesa Reservoir in a manner <br /> which both prevented flooding in Delta and allowed the high <br /> flows the U.S. Fish and Wildlife Service sought for the <br /> endangered fish in the Grand Junction area. The good runoff <br /> also allowed for good rafting and other recreation. REPRESENTATIVE RESERVOIRS <br /> GUNNI ON RIVER BASIN <br /> 90 <br /> 90_,/. <br /> 70 <br /> � 60 <br /> • <br /> �n <br /> 11.1 50 <br /> r <br /> 90_7\ <br /> 10 <br /> Taylor pork Cranford Fruitland <br /> ® Ayg. S/91 contents ® V31/13 Contents <br /> 6 <br />