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— <br /> GUNNISON BASIN • ` <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.6 indicates that for July the GUNNISON RIVER BASIN <br /> Surface water Supply Index Nictary <br /> basin water supplies were slightly below normal. Reservoir 5 <br /> storage measured on August 1 was 102%of average. Flow at 4 <br /> the gaging station, Uncompahgre River near Ridgway, w 3 i-, • �' iIaveraged 344 cfs for the month as compared to the 1961-1991 ;It : c <br /> Jul averse of 338 cfs. Overall stream flows have been good 2 c c:-a= k 1 <br /> so far this year. Most streams did not have significant peak 1 <br /> and earlyJune and a slow 1. ° - r'�` �`d - . {* - 1 <br /> flows due to cool weather in May <br /> snowmelt. _1 II itt'V am <br /> II r u <br /> Outlook E <br /> In the Uncompahgre Valley water supplies have been 3 <br /> excellent so far. The Uncompahgre River has shown a slow - .... _ .. J. . .1 <br /> JAN63 JAN64 JANBS JAN66 JANB7 JAN63 JAN69 JAN9C JAN91 JAN92 <br /> steady runoff which with good rainfall may meet all demands n1DNTW TEAR <br /> until Ouray County ditches turn off for haying. In the <br /> Gunnison area, as a result of the early hay crop and sustained <br /> streamflow, Gunnison ditches will be turned off for haying <br /> before shortages in supplies become noticed. Early haying <br /> could result in an unusually high demand in August and UNCOMPAHGRE R i VER NR R I DGWAY <br /> September for fall pasture irrigation unless rainfall is T00 `J°w BY WATER YEAR <br /> 1 i <br /> i � <br /> 190 <br /> adequate. A high demand in August and September will not 0 1 ' 1 1 1 <br /> likelyj�� be met with available streamflow resulting in possible 160 } /A <br /> administration. 10 - I <br /> 4 1 <br /> S 140 <br /> 130 ! <br /> r, 120 a� <br /> Administrative/Management Concerns .,.§ T1O <br /> op <br /> Water supply for the remainder of the summer will be W g 190 <br /> dependent upon rainfall and reservoir supplies. Blue Mesa `sv 60 <br /> Reservoir did not fill this year and releases have been higher i s0 <br /> —f <br /> than normal. These higher releases are being used for i ` <br /> instream flows in the Black Canyon. While the Redlands 20 <br /> 10 1 <br /> Canal has been able to divert this stream flow this year, it is a <br /> Oct Nov Dec Jan Feb March ADrII May Julia Ju'y Aug Soot <br /> likely that in future years the Bureau of Reclamation will MDNTN <br /> C <br /> wET(19BA) <br /> demand storage releases be delivered below the Redlands Day a A ,9q2 <br /> Canal headgate near Grand Junction for the endangered fish. <br /> REPRESENTATIVE RESERVOIRS <br /> GuNN,9D.61709 BASIN <br /> 100 <br /> 60N. <br /> ° 72• <br /> b n 60 <br /> .F <br /> Dn 50 <br /> N4 40 // <br /> \\ <br /> 3D, <br /> 3 <br /> 20 <br /> 1° ////\\\\_ /�//\�\ ?////N \\' <br /> Tay I or Para Cr awf and Er It l and <br /> ® Avq 7/31 Content% r77 7/31,92 co,,tents <br /> 6 <br />