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Trapper Mining, Inc. <br />Geotech Monitoring Report <br />MLT Review <br />25-Jul-2008 <br />for 07-GX5 (outside the slide), but the pore pressure readings for 07-GI 10 (also inside) <br />are more similar to 07-GX5 than they are to 07-GI3. <br />Please reconsider the statement referenced above, and rephrase, if necessary. <br />4) Piezometer Data - Page 2 of the GMR cover letter states, "Readings from the Z pit <br />piezometer indicate insignificant amounts of pore pressure. This piezometer was <br />inadvertently destroyed in September and is currently inactive." The Piezometer Data <br />spreadsheet reports zero value for pore pressures in the Z pit piezometer (07-ZI2) prior to <br />the date at which it was destroyed. <br />Please provide the data (f any) that were collected for 07-ZI2 prior to the time the <br />piezometer was destroyed <br />5) Bench Marks - Page 3-27a describes the planned construction of 19 holes, of which <br />three (3) will be fitted with inclinometers and four (4) with piezometers. In addition, <br />page 3-27a states, "all the sites will have surface benchmarks." The March 2008 GMR <br />indicates that all 19 holes were drilled between late February and late July of 2007. <br />Inclinometers and piezometers were installed as planned; however, the actual number of <br />bench marks established is only nine (9), rather than the 19 described in the permit. <br />The number of surface bench marks installed is less than half the number that was <br />committed to (9, versus 19) in TR-99. Please explain to the Division both the reasoning <br />behind and proposed justification for this variance. <br />With the exception of the points listed above, the March 2008 Semi-Annual Geotechnical <br />Monitoring Report provided by Trapper Mining, Inc. is in general compliance with the <br />requirements of Permit C-1981-010. Measurements have been made in accordance with <br />the seasonal schedule described on page 3-27a of the permit. <br />Please contact me at (970) 247-1184 with any questions you may have regarding my <br />review of this report. <br />cc: Sandy Brown, DRMS <br />-2-