Laserfiche WebLink
0010 <br />General Shale <br />Building The American Dream <br />November 18, 2014 <br />Colorado Division of Reclamation, Mining, and Safety <br />Mr. Tyler O'Donnell <br />Environmental Protection Specialist <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: M- 1977 -252 Pioneer Mine, Douglas County, Colorado <br />Technical Revision Inert Fill Import Response to Preliminary Adequacy Review for TR -04 <br />1 -MITI O 1176II- <br />General Shale Brick, Inc. (GSB) has received your preliminary adequacy review letter dated <br />September 30, 2014 for the Pioneer Mine (Pioneer) regarding the importation of scrap brick (grog). <br />GSB offers the following responses to your comments: <br />1. Please provide a map which depicts the approximate location where the scrap brick <br />and block will be backfilled. <br />The grog will be placed north of clay stockpile storage area in a mined out area of the pit. <br />Please see the attached map named Pioneer Mine Site Map. <br />2. Please indicate if the final contours which are depicted on the most recently approved <br />Reclamation Plan Map will change. If so, please provide a revised Reclamation Plan <br />Map which shows the proposed topography of the area with contour lines of sufficient <br />detail to portray the direction and rate of slope of all reclaimed lands. <br />We do not anticipate importation of the grog will change the existing reclamation plan. In <br />fact, the materials will help GSB backfill the existing mine area to the approximate contours <br />as shown on the existing reclamation plan map by providing additional back fill materials. <br />3. The Division is concerned with the potential for sinkholes developing over the long <br />term due to piping where voids occur and /or compaction is sufficient. The formation of <br />sinkholes is not considered compatible with the approved rangeland post- mining land <br />use (reverence Rule 3.1.5(9)(e). Per Construction Materials Rule 3.1.5(9)0, please <br />provide additional detail on how the scrap brick will be blended with overburden <br />material so that settling of the backfilled area does not occur. In addition, describe how <br />compaction of the backfilled material will be achieved. <br />The Division should note that the post- mining land use is residential and pastureland per <br />TR -01. <br />