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l Y <br /> SAN JUAN/DOLORES BASIN December, 1998 <br /> • <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.8 indicates that for November the SAN JUAN/DOLORES RIVER BASINS <br /> basin 5 <br /> water supplies were above normal. The Natural surf..."`t" Supply ' "i ctorr <br /> Resources Conservation Service reports the December 1 ,_ <br /> snowpack is 163% of normal. Flow at the gaging station " ° ; <br /> Animas River near Durango averaged 383 cfs, as compared to ▪ 3 <br /> the longterm average of 282 cfs. Storage in McPhee, <br /> g 2 " � <br /> Vallecito, and Lemon reservoirs totaled 101%of normal as of 1- , , „= m e _ _ <br /> the end of November. lil: — <br /> • I I ■ �� I �I■ I <br /> = a N 'I,11�� II I I Im ' 1 1 <br /> Water supply conditions for the San Juan Basin _,_ O : I 1 . 1 <br /> remained high and promising throughout November. A major <br /> basin wide snow storm hit the area November 7 and yielded aa -2- ( i ,, <br /> wet snow throughout both the mountains and lower reaches. -.- I <br /> Durango had over 150% of normal precipitation,2.84 inches, -• , <br /> JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN96 JAN97 JAN5B <br /> including 6.1 inches of snow. Later in the month the weather MEINTWT6AFi <br /> pattern changed to dry and unseasonable warm. <br /> Area rivers stayed above average in November as the <br /> Animas, Dolores, La Plata, and other streams ran about 30% <br /> more than normal. <br /> Reservoirs stored significant quantities although some <br /> were still below normal. Lemon Reservoir was carrying ANIMAS RIVER NR. DURANGO <br /> 20,300 acre-feet, just over half capacity. Red Mesa and 190 FLOW <br /> BY WATER YEAR <br /> Jackson Gulch Reservoirs were also filled to around half 170 <br /> 770 <br /> capacity. Vallecito Reservoir contained 76,000 acre-feet which 160 <br /> ./"------'--..----:er <br /> 7s0 <br /> is its normal winter pool. Ice had not set on most ponds. I ;40 <br /> Warm temperatures later in the month caused much 120 <br /> of the lower elevation snow to melt. Soil moisture greatly o i1,0 <br /> 700 <br /> improved. _.-------19C <br /> 90 <br /> I 60 �' ____---- <br /> Outlook <br /> Prospects are good that no shortages will be ;o <br /> experienced during the winter. More snow is desired and 30 � <br /> forecasted for the area. 10 <br /> act Nov 0•e Jan FOP March <br /> MONTH <br /> O YET(1973) O 09V(1977) G AVG x 1999 <br /> Administrative/Management Concerns <br /> None <br /> Public Use Impacts <br /> Ski areas opened early with ample snow to start the REPRESENTATIVE RESERVOIRS <br /> season. N0 Dolor«/AnInm9 of VSr Baths <br /> 240 C <br /> 220 <br /> =• zoo <br /> 180 <br /> a <br /> • 100//7\ <br /> fl <br /> 80Z.\ <br /> ` <br /> 60 <br /> 20 V <br /> 20-,/./..\\\\ <br /> !lc Ph•• WO loch* <br /> LMaDn <br /> • <br /> ® AVg. 11/30 COMMIS 1 79 11/30/98 Content* <br /> 9 <br /> r <br />