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0000 <br />General Shale <br />Building The American Dream, <br />December 2, 2014 <br />Colorado Division of Reclamation, Mining, and Safety <br />Mr. Michael Cunningham <br />Environmental Protection Specialist <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />DEC 0 2 7014 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Re: M- 1977 -251 Lariat Mine, Jefferson County, Colorado <br />Technical Revision Inert Fill Import Response to Preliminary Adequacy Review for TR -04 <br />Dear Mr. Cunningham: <br />General Shale Brick, Inc. (GSB) has received your preliminary adequacy review letter dated <br />September 30, 2014 for the Lariat Mine (Lariat) regarding the importation of scrap brick (grog). GSB <br />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 in two locations. Grog will be stockpiled at the south end of the <br />upper clay stockpile pad area and the southwest corner of the lower pad area. Please see <br />the attached map named Lariat 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 grog will help GSB backfill the existing mine area to the approximate contours as <br />shown on the existing reclamation plan map by providing additional back fill materials. <br />3. Per Construction Materials Rule 3.1.5(9)(1), please provide additional detail on how the <br />scrap brick will be blended with overburden material so that settling of the backfilled <br />area does not occur. In addition, describe how compaction of the backfilled material <br />will be achieved. <br />Blending <br />The grog will be blended by placing 6 inch or less lifts of grog across the mined out area. <br />Then a six inch layer of overburden will be placed on top of the grog lift. Additional <br />alternating grog and overburden 6 inch lifts will be built on top of the previous lifts until the <br />lifts matches the reclamation plan and /or surrounding native topography. The lifts will be <br />placed by a Caterpillar 637 scraper (scraper). <br />