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DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866 -3567 <br />FAX: (303) 832 -8106 <br />May 24, 2012 <br />Tonia M. Perkins, P.E. <br />Trapper Mining, Inc. <br />P.O. Box 187 <br />Craig, Colorado 81626 <br />RE: Trapper Mining, Inc., Permit C- 1981 -010 <br />First Quarter 2012 Sediment Pond Inspections <br />Dear Ms. Perkins: <br />STATE OF COLORADO <br />COLORADO <br />ID IV I S I O N O F <br />RECLAMATION <br />MINING <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta Pineda <br />Director <br />The Colorado Division of Reclamation, Mining and Safety (Division) has reviewed the above referenced report. The first <br />quarter sediment pond inspection reports and the pond capacity data were received by the Division on April 5, 2012. <br />Sediment pond inspections were conducted by TMI on January 12, 2012. Several issues were identified and will need to be <br />addressed by TMI. <br />Rule 4.05.9(15)- Inspection Report Requirements: <br />Item (b) of this section requires the inspection report to indicate the existing storage capacity of the impoundment. There are <br />several discrepancies that must be clarified. <br />1.) On the "Impoundment Inspection — Pond Capacity Data" sheet submitted with the report, the I't Quarter estimated <br />sediment level for the Coyote Pond was 38 acre -feet. The total capacity of the pond is reported to be 75.1 acre -feet. Given <br />the estimated capacity of sediment in the pond, the % sediment should be about 50 %; however, the reported amount was 0 %. <br />Please correct this discrepancy. <br />2.) The report indicates 0% sediment contained in all of the impoundments. According to the 4th Quarter Sediment Pond <br />Inspection report the following ponds contained a percentage of sediment: Johnson #6, Johnson #7R, West Pyeatt #1, West <br />Pyeatt #2, Middle Pyeatt #1 and West Flume. These ponds had reportable levels of sediment in 2011. According to section <br />4.8.1.4 of the permit, sediment will be removed from the ponds once the capacity has reached 60 %. Given the reported % <br />sediment in 2011, these ponds had not reached the trigger point for sediment removal. It does not appear the sediment level <br />for the ponds has been accurately estimated during the I't quarter inspection. <br />Please review the procedure for estimating the sediment level of the impoundments and ensure the levels are reported <br />accurately in the 2nd quarter report. Or, explain how the reported % sediment levels identified in the report are accurate. <br />No maintenance items, erosion, instability, structural weaknesses or other hazardous conditions were reported. <br />If you have any questions feel free to contact me at (303) 866 -3567 ext. 8120. <br />Sincerely, <br />Jared Ebert <br />Environmental Protection Specialist, DRMS <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />