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L q 1-0/0 <br />TRAPPER MININI INC. <br />TRAPPER MINE <br />April 20, 2011 <br />CERTIFIED GO <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and Environment PQR ?.?e 5a?e"N <br />WQCD-PE-132 ?g <br />4300 Cherry Creek Dr. South <br />Denver, CO 80222-1530 <br />Subject: First Quarter 2011 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO-0032115 <br />Dear Ms. Lenkey: <br />Enclosed are Trapper Mine's First Quarter 2010 Colorado Wastewater Discharge Monitoring Reports for the <br />period O1/l/11-03/31/11. During this quarter, seven NPDES outfalls were active. Outfalls 001, 002, 011 and 020 <br />discharged routinely throughout the quarter. Outfalls 017 and 021 discharged in response to spring snowmelt <br />occurring in March. Outfalls 005, 008, 009, 012, 013, 014, 015, 016, 018, 019, 022, 023 and 024 did not <br />discharge during the quarter. Values reported on the enclosed DMRs represent the maximum (or minimum as <br />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 analyses during the quarter. Two species acute tests were <br />completed at outfalls 011 and 020. Outfalls 017 and 021 did not have mine water discharged. No exceedances of <br />WET test limitations were observed at any tested outfalls. <br />This winter resulted in average to above average snow pack for the site during the reporting period. Snow melt <br />was slow during the period. February remained cool resulting in very little snow pack loss during the month. <br />Continued snow falls into late March kept snow on the ground until the end of the period. Temps remained <br />unseasonally cool for the entire quarter. The enclosed NOAA weather summary reports show the temperatures <br />and snow depth measurements for the period mentioned. Daily precipitation measurements are recorded at 7:00 <br />a.m. as well as 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 />Graham Roberts <br />EHS Specialist <br />GCR [WATER\DMR Cover Letter\V Quarter 20111 <br />Enclosure <br />c ? <br />File 1 .'2 <br />P.O. Box 187 Craig, Colorado 81626 (970) 824-4401