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<br />SAN JUAN/DOLORES BASIN <br /> Sep - 08 <br /> <br />Basinwide Conditions Assessment <br /> The S WSI value for the month was 0.0 . Flows at <br />SAN JUAN-DOLORES BASIN SWSI HISTORY <br />the Animas River at Durango averaged 470 cfs (81% of <br />4 <br />normal) with a maximum average daily peak flow of 749 cfs <br />th <br />on August 9 . The Dolores River at Dolores averaged 189 <br />3 <br />cfs (76% of normal) with a maximum average daily peak flow <br />th <br />2 <br />of 410 cfs on August 9 . The La Plata River at Hesperus <br />DRY INDEX VALUE WET <br />averaged 15.4 cfs (66% of normal) with a maximum average <br />1 <br />st <br />daily peak flow of 20.8 cfs on August 1 . Precipitation in <br />Durango was 3.18 inches for August which is above the 30 - <br />0 <br />year average of 2.63 inches. Precipitation to date in <br />Durango, for the water year, is 20.78 in ches which is above <br />-1 <br />the average of 17.57 inches. Temperatures were slightly <br />-2 <br />above normal for the month. Durango was 1.3° above its <br />30 - year average high and 1.5° above the 30 - year average <br />-3 <br />low. At the end of the month Vallecito Reservoir contained <br />89,9 30 acre - feet compared to its normal contents of 69,728 <br />-4 <br />acre - feet (129% of normal). McPhee Reservoir was up to <br />Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 <br />MONTH / YEAR <br />313,899 acre - feet compared to its normal contents of <br />275,471 acre - feet (114% of normal), while Lemon Reservoir <br />was up to 25,550 acre - feet as comp ared to its normal <br />content of 22,389 acre - feet (114% of normal). <br />ANIMAS RIVER NR. DURANGO, FLOW BY WATER YEAR <br /> <br />Outlook <br />1,000,000 <br /> By the end of the month all the major rivers within the <br />900,000 <br />basin were flowing well below average. River flows and <br />CUMULATIVE FLOW, Acre-Feet <br />800,000 <br />precipitation in Durango only hedged slightly above average <br />700,000 <br />th <br />due to a rain event that occurred on August 30 . <br />600,000 <br /> <br /> <br />500,000 <br />Administrative/Management Concerns <br />400,000 <br /> Rain within the La Plata River basin was sparse at <br />300,000 <br />best. The compact period on the La Plata between Colorado <br />200,000 <br />th <br />and New Mexico began on February 15 . New Mexico <br />100,000 <br />th <br />placed a cal l starting on April 30 for half the flow at the <br />0 <br />upper index gage up to 80cfs. There was a total of 11 days <br />Oct Nov Dec Jan Feb March April May June July Aug Sept <br />in August where all Colorado ditches on the La Plata were <br />shut off in order for Colorado to meet its compact obligations. <br />WET (1973) DRY (2002) AVG 2008 <br /> <br /> <br />REPRESENTATIVE RESERVOIRS <br /> <br /> <br />400,000 <br /> <br />350,000 <br /> <br /> <br />300,000 <br />Usable Storage, acre-feet <br /> <br />250,000 <br /> <br /> <br />200,000 <br /> <br />150,000 <br /> <br /> <br />100,000 <br /> <br />50,000 <br /> <br /> <br />0 <br />McPhee Vallecito Lemon <br /> <br /> <br />Avg. 8/31 Contents 8/31/08 Contents <br /> <br /> <br />9 <br />