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SAN JUAN/DOLORES BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.3 indicates that the current SURFACE WATER SUPPLY INDEX <br /> conditions are near normal. Snowpack measureds <br /> 84% of San Ju.NoolOrsi/Mlmq River Basins <br /> average on February 1, 1991, and is 350% of last year. ,- <br /> Snowpack is lowest in the Dolores River basin at 74% of - 3_ f ; , <br /> average. Precipitation for the month of January was 91% of E .i „ . . <br /> 2- X:j �. :: <br /> average. Reservoir storage in reservoirs on the Pine River, A M . <br /> Florida River and Mancos River is 141%of normal and 163% 1 --: :. �` 'I' <br /> of lastyear. McPhee Reservoir storage was approximately t' 4 .,III <br /> g PP y 1 irL: ti <br /> 240,000 acre-feet on February 1, 1991. Lemon Reservoir had .,- ti. <br /> 24,366 acre-feet in storage on February 1, 1991, compared to = -. N <br /> 18,700 acre-feet in storage one year ago. Vallecito Reservoir 0 -2- ,.,�- <br /> had 77,100 acre-feet in storage on February 1, 1991, -3- o- <br /> compared to 44,400 acre-feet of storage on February 1, 1990. - # --- <br /> JAN91 JAN92 JAN83 JAN91 JANBS JAN96 JANE7 JANB9 JANE9 JAN90 JAN91 <br /> Base flows in most streams were below normal due to MONTN/TEAR <br /> unseasonably low temperatures for the month. Flow at the <br /> key gaging station,Animas River at Durango, averaged 250 cfs <br /> as compared to the historic monthly flow of 208 cfs. Ground <br /> water levels remain below normal as a result of two years of <br /> drought. ANIMAS RIVER NR. DURANGO <br /> PLOW OY WATER YEAR <br /> 190 - <br /> 180 O <br /> Outlook: /70 <br /> Streamflow is likely to be near normal. The ,00 - <br /> streamflow forecast is lowest in the Dolores River drainage 1 „o I <br /> above Dolores at 79% of average and highest in the Navajo i, ;20 _ <br /> River drainage above the Oso Diversion Dam at 109% of 1 "0 <br /> average. 1.1 93 - <br /> V <br /> Administrative/Management Concerns: I E° ,—r <br /> S0 <br /> Normal administration is in effect. <br /> 30 _ <br /> 20 _ _ , <br /> Public Use Impacts: 10 <br /> 0Ct Nov Osc Jan Fab March <br /> Adverse impacts on recreational uses of water are not MONTH <br /> likely to develop in 1991. 'off YEAR(1°"' CRY YEAR"9TT, a Aim 199 <br /> *Streamflow forecasts provided by the USDA Soil Conservation <br /> Service. Dolores—Animas Basin Reservoir Supplies <br /> 260 i <br /> 240- <br /> 220-.47N <br /> 0 200 <br /> ! 190 <br /> g„ 160 <br /> '.I 140 <br /> hF 12°_,-/// <br /> •' 100 <br /> a <br /> i 80-:„..„<///Ns : <br /> GO/\ <br /> 40 <br /> \N <br /> 0 //\\ //\\ //\\\\ <br /> McPhee VaIIaC lto lemon <br /> ® Avg. 1/31 Canton. ® 1/31/91 Contents <br /> • <br />