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Trapper Response to Comment 19: There are no plans to construct or modify any water routing structures <br />with this revision. <br />When comparing the pre (M3, PR7) and post mining (M12, PR9) topography for <br />the drainage cross sections proposed in Map M15 DRMS found the contour <br />interval in the M3 series is incorrectly called out at 10', it appears to be 20' in <br />reality making the M# series maps incorrect. <br />20. Please resubmit corrected M3 series maps drawn at a contour interval of 10 feet <br />so that DRMS can accurately compare pre and post mining topography in the <br />drainage ways. <br />Trapper Response to Comment 20: The legend included on M3 series maps is standardized on all of <br />Trapper's 400 scale maps. The reference to 10' contours was in error on our part. The M3 map series has <br />been corrected to reflect the actual 20' contours present on the maps. Due to the M3 series maps depicting <br />the pre -mining topography of the mine -site, 10' interval contours are not available. The topography used on <br />M3 map is derived from the USGS quadrangles drawn in 1966. The revised maps are included in this <br />response. <br />Rule: 2.05.3(6) <br />The above rule addresses the requirements for spoil and associated disposal <br />structures. <br />A description of the proposed N Pit was included in Section 3.1.4.1 as well as <br />Map M4. TMI states that overburden as well as excess spoil for the N Pit will be <br />regraded into the reclamation west of the pit and placed as fill in the L Pit. <br />Associated updated post -mining topography descriptions and maps were <br />included in the submission. However, as per the discussion with Trapper and the <br />Division (11 May 2018), TMI explained that additional excess spoil from the <br />proposed N Pit will be placed within the Utility Waste Disposal Area (ash pit). As <br />per Rule 2.05.3(6)(b), descriptions, including appropriate maps, prepared <br />according to the standard of 2.10, and cross section drawings, of the proposed <br />disposal site and design of the spoil disposal structures according to 4.09 are <br />required. <br />A map showing location of the disposal area was included with Map M47A in the <br />submittal however, no cross section drawing of the disposal area are provided. <br />A post mining topo series was provided, the M12 series showed cross sections <br />forNighthawk (N) Pit and Lancaster (L) Pit, and Map M14A provided the various <br />cross section diagrams for N and L pits. <br />21. Please provide cross section drawings for the excess spoil that will be placed <br />along the Utility Waste area. <br />