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TRAPPER NIAINO INC. <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 />January 13, 2011 <br />SAN ?x1011 <br />fl <br />Mirlige ai? SQ <br />Subjects Fourth Quarter 2010 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO-0032115 <br />Dear Ms. Lenkey: <br />Enclosed are Trapper Mine's Fourth Quarter 2010 Colorado Wastewater Discharge Monitoring Reports for the <br />period 10/l/10-12/31/10. During this quarter, four NPDES outfalls were active. Outfalls 001 and 002 discharged <br />routinely throughout the quarter. Outfall 011, and 020 discharged in response to fall precipitation events in <br />October and November. Outfalls 005, 008, 009, 012, 013, 014, 015, 016, 017 018, 019, 021, 022, 023 and 024 <br />did not discharge during the quarter. Values reported on the enclosed DMRs represent the maximum (or minimum <br />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. Two outfalls were sampled for WET test analyses during the quarter. Two species acute tests were <br />completed at outfalls 011 and 020. No exceedances of WET test limitations were observed at any tested 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 />Sincerely, <br />.,,,a <br />GCR [WATER\DMR Cover Letter\4th Quarter 2010] <br />Enclosure <br />c Rob Zuber, CDRMSI <br />File 109.2.7 <br />41-- <br />Graham Roberts <br />EHS Specialist <br />P.O. Box 187 Craig, Colorado 81626 (970) 824-4401