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P.O. Box 187 <br />CERTIFIED <br />TRAPPER MINING IflC. <br />Craig, Colorado 81626 <br />January 9, 2017 <br />(970) 824-4401 <br />RECEIVED <br />Colorado Department of Public Health and Environment <br />FEB 0 7 2017 <br />WQCD-PE-B2 <br />Division of &ec am y ion, <br />4300 Cherry Creek Dr. South Mining <br />Denver, CO 80222-1530 <br />Subject: Fourth Quarter 2016 Colorado Wastewater Discharge Monitoring Reports <br />Permit No. CO -0032115 <br />To whom it may concern: <br />Enclosed are Trapper Mine's Fourth Quarter 2015 Colorado Wastewater Discharge Monitoring Reports for the <br />period 10/1/16-12/31/16. During this quarter, three NPDES outfalls were active. Outfalls 001. 002 and 011 <br />discharged routinely throughout the quarter. Outfalls 008, 009, 017, 018, 019, 020, 021, 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 />The TDS is reportable on a quarterly basis per the permit. The TDS values are as follows for each active outfall: <br />001 <br />002 <br />011 <br />3810 mg/L <br />2310 mg/L <br />3280 mg/L <br />No exceedances of primary effluent limitations occurred during this quarter. <br />Also enclosed are monthly NOAA weather summaries for the reporting period and WET test report forms as <br />applicable. <br />Trapper is required to maintain sediment levels in ponds at or below 60% of the pond volume. All outfalls have been <br />properly maintained and no ponds exceeded the 60% threshold for sediment accumulation. All structures operated <br />properly and were not compromised in any way. All other operations were properly conducted concerning the <br />sediment control structures at Trapper Mine. <br />Please contact me if you have any questions regarding the enclosed information, 970-826-6143 <br />Sincerely, <br />ELECTRONICALLY SUBMITTED AND SIGNED THROUGH NetDMR <br />Graham Roberts <br />Environmental Engineer <br />GCR [WATER\DMR Cover Letter\NetDMR Cover Letters\C00032115_DMRCov_2016_04.doel <br />Enclosure <br />c Robin Reilley, CDRMS <br />File 109 2 7 <br />