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INTERNAL MEMORANDUM <br />Date: 29 April 2013 <br />To: Jared L. Ebert, Lead Specialist <br />From: Marcia L. Talvitie, P.E. `11 <br />Subject: Trapper Mine (C- 1981 -010) <br />Review of March 2013 Semi - Annual Geotechnical Monitoring Report <br />At your request, I have reviewed the Semi - Annual Geotechnical Monitoring Report (GMR) from <br />Trapper Mining, Inc., dated March 30, 2013. This report covers the period of time between <br />September 27, 2012 and March 27, 2013. <br />Just two monitoring stations remain in service: Stations 7 and 8. Due to technical issues and <br />physical damage, inclinometer and piezometer data can no longer be collected at Station 7. GPS <br />data from this site does not show that any significant movement has occurred during the previous <br />six months. <br />As noted in Trapper's GMR cover letter, Station 8 is reporting movement along the southern <br />edge of the pit - inclinometer and GP data began to shift around February 1St, the piezometer <br />stopped functioning, and tension cracks have been observed on the ground. Trapper appears to <br />have taken appropriate action based on these observations, and has hired a consultant to evaluate <br />the situation. <br />I have no comments regarding this GMR, other than to say that the monitoring system is <br />fulfilling its intended purpose: alerting the mine to any changes that may be occurring. <br />Please feel free to contact me with any additional questions you may have. <br />cc: Sandy Brown, DRMS <br />