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Response to DRMS Adequacy Review — Cotter LP -21 Mine Reclamation Plan Amendment <br />Cotter Corporation (N.S.L.) (Cotter) submits this response to the October 30, 2012 letter from <br />Dustin Czapla, Division of Reclamation, Mining and Safety ( "DRMS "), to Glen Williams, <br />Cotter. The DRMS' comments are in italics and Cotter's responses are in bold. <br />LP -21 Mine, File No. M- 1977 -305, Amendment (AM1) Application Adequacy <br />Review <br />Mining Plan <br />1. Addressing Rule 6.4.4 — On page D-5 under item b., the exhibit states that ore will be piled up <br />to a workable stockpile. Please provide the Division with a maximum anticipated amount of <br />ore to be stockpiled at any given time. <br />No more than 1,700 tons of ore will be stockpiled at any given time. <br />2. Addressing Rule 6.4.4 - Please provide the Division with the proposed location for ore <br />storage, and any construction details for an ore storage pad, such as approximate <br />dimensions, lining material(s), and grade, etc. Also, please show the ore storage location on <br />the mining plan map(s). <br />The ore stockpile will be located southeast of the waste rock pile on flat ground and <br />limited to 0.12 acres. Due to limited time on the pad, limited precipitation in the <br />area, low permeability and limited downward mobility due to the high clay content <br />of the soils underlying the pad, the construction of an additional liner will not be <br />necessary. <br />The ore stockpile has been added to the mining plan maps found in Attachment 1. <br />Reclamation Plan <br />3. Addressing Rule 6.4.6 (a) — Please indicate the reclamation contour interval on the <br />Reclamation Plan Map(s). <br />The contour interval outside the affected area is 20 feet and inside the affected area <br />the contour interval is 1 foot. The 1 foot intervals have been indicated on the map. <br />The corrected map can be found in Attachment 2. <br />1 <br />