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March 30, 2012 <br />Mr. Jared Ebert <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining, and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Dear Mr. Ebert: <br />RE: Semi - annual Geotechnical Monitoring Report — March 2012 <br />Trapper began submitting semi - annual monitoring reports to the Division, beginning March 2008 with the last <br />report sent on September 28, 2011. Trapper has been monitoring the 2006 landslide area for movement <br />through the use of a continuous monitoring system. <br />Section 3.3.3 of Trapper's permit details the initial configuration of the monitoring system. Since the last report <br />was submitted, no changes have occurred in the configuration of the system. A map has been attached <br />showing the location of the four monitoring sites. Inclinometer, piezometer and surface displacement graphs for <br />all four sites covering the time period of September 29, 2011 through March 29, 2012 are attached. <br />Since the last report, the software used to download and analyze the data has changed from the Atlas <br />Monitoring System to the Vista Data Vision. The new software allows more options relating to downloading <br />data into tables, analyzing the data in various graphs and flexibility with the graph scales. Applying threshold <br />limits for the alarms have improved in this software as well. Due to power outages and surges, some spikes <br />have occurred in the graphs. When the specialists at Applied Geomechnics have time, they will take these <br />spikes out. <br />At the end of the last report, the GPS monitoring system located at station 8 was not operating. The receiver <br />and radio were simultaneously not functioning properly. The system has been fixed and began functioning <br />around October 11, 2011. <br />The monitoring system has shown no significant movement during the period. Please contact me if you have <br />any questions. <br />Sincerely, <br />Tonia Perkins, P. E. <br />Senior Mining Engineer <br />P.O. Box 187 <br />TRAPPER MINING INC. <br />RECEIVII <br />APR 0 2 2012 <br />Division of Reclamation, <br />Mining and Safety <br />Craig, Colorado 81626 (970) 824 -4401 <br />