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<br />SAN JUAN/DOLORES BASIN <br /> <br />Basinwide Conditions Assessment <br />The SWSI value for the month of October was 3.9. <br />Flow at the gaging station Animas River near Durango was <br />1600 cfs, as compared to the long-term average of 385 cfs. <br />Storage in McPhee, Vallecito, and Lemon reservoirs totaled <br />1190/0 of normal as of the end of October. <br />October weather brought much more monsoon <br />moisture to Division 7. In Durango, 4.46 inches of <br />precipitation were recorded. For the Water Year, Durango <br />had a total of 4.46 inches of moisture, this works out to <br />2300/0 of normal precipitation. <br />The above normal precipitation is reflected in <br />streamflow. The Animas River maximum average daily peak <br />was 7070 cfs on Oct. 7th and averaged 1600 cfs for the <br />month, which is 3790/0 of normal. The Dolores River <br />averaged 538 cfs for the month, which is 401 % of normal. <br />The La Plata River at Hesperus averaged 72.8 cfs for the <br />month compared with its normal flow of 15.0 cfs; this is <br />4850/0 of normal. <br /> <br />Outlook <br />With the higher than normal precipitation, reservoirs <br />took the opportunity to store water. All three major reservoirs <br />increased storage levels and contain above average storage <br />at the end of the month. Vallecito Reservoir contained <br />95,535 acre-feet (highest stored amount for the end of <br />October based on period of record 1941 - 2006) compared to <br />its normal contents of 50,775 acre-feet. Vallecito continues <br />to release water in order to prepare for the winter season. <br />The goal is to reduce the reservoir level below the tainter <br />gates so ice can't damage them. McPhee Reservoir was up <br />to 270,852 acre-feet, 1060/0 of normal while Lemon Reservoir <br />was up to 30,664 acre-feet as compared to 19,544 acre-feet <br />for the previous month. <br />Precipitation from the monsoons kept the high <br />temperatures lower but maintained the low temperatures <br />right at normal. Overall Durango was 3.50 below its 30-year <br />average high and at its 30-year average low. <br /> <br />I- <br />W <br />S <br /> <br />W <br />::J <br />---l <br /><( <br />> 0.0 <br />>< <br />w <br />o <br />z <br />- -1.0 <br />>- <br />0:: <br />o <br />-2.0 <br /> <br />ill <br />ill <br />LL <br />ill <br />~ 200,000 <br /> <br />s- <br />o <br />.....J <br />LL <br />W <br />> <br />i= <br />:5 100,000 <br />:J <br />::;2: <br />:J <br />U <br /> <br />Q3 <br />2 <br />~ 250,000 <br />cti <br />Q.)- <br />~ 200,000 <br />o <br />U5 <br />~ 150,000 <br />~ <br />::J <br /> <br />9 <br /> <br />Nov-06 <br /> <br />SCIN JU<W-DJLDRES BASIN SV\.6I HISTORY <br /> <br />4.0 <br /> <br /> <br />3.0 <br /> <br />2.0 <br /> <br />1.0 <br /> <br />-3.0 <br /> <br />-4.0 <br />Jan-97 Jan-98 Jan-99 Jan-OO Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-03 <br /> <br />I\t1ONTH I YEAR <br /> <br />ANIMAS RIVER NR DURANGO, FLOW BY WATER YEAR <br /> <br />300,000 <br /> <br /> <br />o <br />Oct <br /> <br />Nov <br /> <br />Dee <br /> <br />Jan <br /> <br />Feb <br /> <br />March <br /> <br />April <br /> <br />-----8-- VvET (1973) <br /> <br />-fr- AVG <br /> <br />--*2007 <br /> <br />--+-- DRY (2002) <br /> <br />REPRESENTATIVE RESERVOI RS <br /> <br />400,000 <br /> <br /> <br />350,000 <br /> <br />300,000 <br /> <br />100,000 <br /> <br />50,000 <br /> <br />McPhee <br /> <br />Vallecito <br /> <br />Lemon <br /> <br />III Avg. 10/31 Contents <br /> <br />11I1 0/31/06 Contents <br />