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st Co <br />ts, Inc. <br />Geotechnical f Environmental Engineering • Materials Testing <br />Subject: Marr Mine -Permit No. C-80-006 <br />Permit No. C-80-006 <br />Jackson County, Colorado <br />Dear Mr. Bumell: <br />September 13, 2005 <br />Mr. Jim Bumell <br />Colorado Department of Natural Resources <br />Division of Minerals and Geology <br />1313 Sherman Street Rm. 215 <br />Denver. CO 80203 <br />Project No~~1VED <br />SEP 15 2005 <br />Diwvon o(Minerals antl Geology <br />NWCC, Inc. is pleased to provide you with the certified sediment pond inspections for the Marr <br />Mine located in Jackson County, Colorado. Brian D. Len, P.E. and Robert J. Peterson from <br />NWCC conducted the inspection on August 18, 2005. The purpose of the inspection was to <br />provide annual certification by a Professional Engineer registered in the state of Colorado. The <br />inspection included Ponds A through G for the mine area and the pond situated at the Tipple. <br />The inspection forms are attached for each pond and the results of the inspection are <br />summarized below. Photographs taken during the inspection are available upon request. <br />All ponds, embankments and spillways were functioning as designed and intended. All ponds <br />except Pond G contained some water. No water levels were at the designed point of discharge <br />but some discharge was observed at Ponds D and E due to slight seepage into the discharge <br />pipe. We observed both sides of each embankment, the crest, the primary-and emergency <br />spillway structures, the outlet pipes, weirs and discharge areas for each pond. There are no <br />actions required for any pond for immediate health or safety concerns. We have made <br />recommendations for several action items particularly associated with the ponds with a <br />permanent status (A, B, D and E). The recommendations were made to maintain or improve <br />the function and safety of the noted dam/pond. No actions are waranted for the temporary <br />ponds that will be reclaimed in the near future. <br />Please contact the undersigned with questions or comments on the inspections. <br />Sincerely, <br />NWCC, INC. <br />Robert J. Peterson, CPG <br />Senior Environmental Engineer <br />Attachments <br />cc: G. Patterson, EFCI <br />Brian D. Len, P.E. ©,r e 1'~''~aS~ <br />President ~`~~,,Fr;,~......•^ <br />(970) 879-7888 • Fax (970) 879.7891 <br />2580 CoDOer Ridoe Drive • P.O. Snr 775796 • Rtnamhnat .4nrinna (:Cl R(id77 <br />