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!TRAPPER MINE <br />CERTIFIED <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division <br />WQCD -P -B2 <br />4300 Cherry Creek Dr. South <br />Denver, CO 80222 -1530 <br />Subject: Fourth Quarter 2011 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO- 0032115 <br />Dear Ms. Lenkey: <br />Enclosed are Trapper Mine's Fourth Quarter 2011 Colorado Wastewater Discharge Monitoring Reports for the <br />period 10/1/11 - 12/31/11. During this quarter, six NPDES outfalls were active. Outfalls 001, 002 and 011 <br />discharged routinely throughout the quarter. Outfall 017, 020 and 021 discharged in response to pit dewatering <br />activities at various times during the period. Outfalls 005, 008, 009, 012, 013, 014, 015, 016, 018, 019, 022, 023 <br />and 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. Four outfalls were sampled for WET test analyses during the quarter. Two species acute tests were <br />completed at outfalls 011, 017, 020 and 021. No exceedances of WET test limitations were observed at any tested <br />outfalls. <br />The enclosed NOAA weather summary reports show the temperatures and precipitation measurements for the <br />period mentioned. Daily precipitation measurements are recorded at 7:00 a.m. as well as daily maximum and <br />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 />Thank you for your cooperation in this matter. If you have any further questions or comments concerning the <br />enclosed information, feel free to contact me. <br />GCR [WATER \DMR Cover Letter \4th Quarter 2011] <br />Enclosure <br />c Jared Ebert, CDRMS <br />File 109.2.7 <br />PO Box 187 <br />TRAPPER MININI INC. <br />January 20, 2012 <br />Sincerely, <br />Graham Roberts <br />EHS Specialist <br />Craig, Colorado 81626 (970) 824 -4401 <br />