Laserfiche WebLink
SAN JUAN/DOLORES BASIN August, 1997 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.6 indicates that for July the basin SAN JUAN/DOLORES RIVER BASINS <br /> later supplies were above normal. Flow at the gaging station 5 Surface Water Supply Index",story <br /> Animas River near Durango averaged 1,758 cfs as compared ,- <br /> to the long term average of 1,149 cfs. Storage in McPhee, 1 g <br /> u 3- <br /> Vallecito, and Lemon reservoirs totaled 123% of normal as of -= <br /> the end of July. 2- >. <br /> 7"-- <br /> After an excellent runoff period in June, July began 1 1- i : ;dry and the snow pack quickly melted down. Some north jib fil <br /> i D- �,,,„ : 'I,''� r <br /> facinghigh elevation snow did remain and base stream levels 0' <br /> g 0' , , <br /> stayed high in most drainages. a .2_ I <br /> The La Plata River did not become intermittent at any a 1 <br /> time during July. The compact was met on the La Plata River -3- <br /> _ f. <br /> during the entire month, although many diversions were -{ 1 - s ^" ---- --------. <br /> JANBB JANB9 JAN90 JAN91 JAN92 JAN93 JAN94 JAMBS JAN90 JAN97 <br /> curtailed during the second week as the river receded rapidly. MONTH/YEAR <br /> Monsoon storms arrived in the area after July 19. <br /> This caused area rivers to experience increased flows going <br /> into August, with the Animas River increasing to over 3,500 <br /> cfs from 1,200 cfs. Minor flooding was experienced in many <br /> areas across southwest Colorado. The inflow to Vallecito ANIMAS RIVER NR. DURANGO <br /> Reservoir increased to 3,000 cfs, causing adjustments in the 1 FLOW BY WATER YEAR <br /> releases to avoid spilling. Other reservoirs began controlled 0.0 . .-----° <br /> reductions in storage levels so that many river calls were D.0 <br /> taken off. I. <br /> q.7 <br /> 1. 0.6 - <br /> Outlook <br /> o_ 0.5 <br /> Although early August witnessed dry weather again,more rain u <br /> was predicted and prospects of excellent carry over storage s D. <br /> were good. 0.3 <br /> 0.2 • <br /> Public Use Impacts 0,1 <br /> The increase in stream flows into the end of July provided an D - - <br /> Oct Nov Dec Jan Feb ~en April May June July Aug Sept <br /> extension of rafting flows,but fishing opportunities were some MONTH <br /> what reduced. G WET(1973) d DRY(1977) C AVG X 1997 <br /> REPRESENTATIVE RESERVOIRS <br /> DOLORES-ANIMAS RIVER BASINS <br /> 400 <br /> 350- \ <br /> 1 300-,,,, <br /> i 250 <br /> 11 <br /> ria i ". .\\\ <br /> b8 <br /> . 150 <br /> n <br /> • tit• <br /> ioo <br /> SD V <br /> 0 /\\ \ rTll.\\\ <br /> McPhee Vallecfto Lemon <br /> ® Avg. 7/31 Contents ® 7/31/97 Contents <br /> 9 <br />