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TR9PP6& NININ6INC. <br />April 18, 2008 <br />CERTIFIED <br />~~~~~~~~ <br />Ms. Carla Lenkey ~~~'~ ~ $ ~oo$ <br />Colorado Department of Public Health and Environment C,,yt;ton of Reclatna~' <br />WQCD-PE-B2 hllining and Safety <br />4300 Cherry Creek Dr: South <br />Denver, CO 80222-1530 <br />Subject: First Quarter 2008 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO-0032115 <br />Dear Ms. Lenkey: <br />Enclosed are Trapper Mine's First Quarter 2007 Colorado Wastewater Discharge Monitoring Reports for the <br />period 01/1/08-03/31/08. During this quarter, five NPDES outfalls were active. Outfalls 001, 002 and 020 <br />discharged routinely throughout the quarter. Outfalls 011 and 021 discharged in response to spring snowmelt <br />surges occurring in mid March. Outfalls 005, 008, 009, 012, 013, 014, 015, 016, 017, 018, 019, 022, 023 and <br />024 did not discharge during the quarter. Values reported on the enclosed DMRs represent the maximum (or <br />minimum as applicable) monthly/daily values generated at each outfall during the quarter. <br />Also enclosed are monthly NOAA weather summaries for the reporting period and WET test report forms as <br />applicable. Three outfalls were sampled for WET analyses during the quarter: Two species acute tests were <br />completed at outfalls 011, 020 and 021. No exceedances of WET test limitations were observed at any tested <br />outfalls. <br />This winter resulted in heavy snow pack and cold temperatures for most of the reporting period. Snow melt was <br />fairly slow throughout the period. One weekend in March resulted in some increased flows due to temps in the <br />50's on the 2'~ otherwise temps remained cool and snowmelt did not, pickup until late March and throughout <br />April this year. The enclosed NOAA weather summary reports show the ,temperatures and snow depth <br />measurements for the period mentioned.. Daily precipitation measurements are recorded at 7:00 a.m. as well as <br />daily maximum and minimum temperatures from the previous 24 hours. <br />No exceedences of primary effluent limitations occurred at any outfall during the quarter. Trapper is required to <br />maintain sediment levels in ponds at or below 60% of the pond volume. All outfalls have been properly <br />maintained and no ponds exceeded the 60% threshold for sediment accumulation. <br />If you have any further questions or comments concerning the enclosed information, feel free to contact me. <br />Sincerely, <br />~~ ~~ <br />,~ ~ f r' r <br />~r..._ 'tom/ <br />GCR [WATER\DMR Cover Letter\1~ Quarter 2007) <br />Enclosure <br />c Janet Binns, CDRMS <br />File 109.2.7 <br />Graham Roberts <br />EHS Specialist <br />P.O. Box 187 Craig, Colorado 81626 (970) 824-4401 <br />