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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />May 18, 2016 <br />Interoffice Memo <br />Trapper Mine (Permit No. C-1981-010) <br />Technical Revision No. 115 (TR -115) and <br />Geotechnical Monitoring Reports — March 2015, September 2015 and March 2016 <br />Tabetha, <br />After my review of the Trapper Mine's Semi-annual Geotechnical Monitoring Reports — March <br />2015, September 2015 and March 2016, I have the following comments: <br />Displacement graphs have been provided for three sites that are monitoring a previous landslide <br />area that is currently being mined through. Three displacements graphs which has measured <br />change in X -Y -Z coordinates are provide for each site. After reviewing displacement <br />measurements, I have no comments or concerns. The information provided have shown little to <br />no movement in the X -Y -Z direction to warrant concern of instability over the time monitoring <br />the area. However, after reviewing a previous memo by Marcia Talvitie, dated April 16, 2015, <br />she commented that this continuous monitoring program in place was developed as part of a new <br />ground control plan submitted to MSHA in 2009. Marcia Talvitie also requested additional <br />information regarding MSHA's requirements that appears to not have been provided. I believe <br />that this request is still valid to ensure all of MSHA's requirements have been satisfied with the <br />provided monitoring plan. Please Have TMI provide information of MSHA's plans and <br />requirements before removing the monitoring plan. <br />This concludes my review of Trapper Mine's permit for TR -115 and Semi-annual Geotechnical <br />Monitoring Reports — March 2015, September 2015 and March 2016. If you have any questions, <br />feel free to contact me. <br />Sincerely, <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />ov Coto <br />f <br />^fin, <br />r 1876 <br />