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1" Quarter 2001 DMR <br />CO-00045161 <br />April 6, 2001 <br />Colowyo experienced a watTtting trend from February 19-21, 2001. Until this time, our <br />sediment control ponds have experienced very little inflow. With the exception of OOIA, no <br />other discharges had occurred since 2nd quarter 2000. Outfall OOSA last discharged 2nd quarter <br />1999. <br />The temperature data exhibited on the following page is gathered at an elevation of 7,200 feet. <br />The elevation of the three ponds is at 6,200 feet. Roughly the temperature increases <br />approximately 1 degree Fahrenheit for every 300 feet decrease in elevation. This indicates <br />that the temperature at the three ponds was 3-4 degrees wanner than at the weather monitoring <br />station. Precipitation and temperature data from February 20-21 is attached and demonstrates <br />the increasing temperatures which affected Outfalls OOSA, 006A, and OOIA. <br />Please feel free to contact me at (970) 824-1531 with any concerns or questions you may have. <br />Respectfully, ,~ f <br />Kimberley A. Wolf <br />Cc: 1D Harmon <br />SR Hinkemeyer <br />Mr. Byron Walker <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO. 80209 <br />