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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 DIVISION O F <br />Phone: (303) 866-3567 n't t N E fZA L <br />FAX: (303) 832-8106 & <br /> GEOLOGY <br /> RECLAMATION <br /> MINING•SAFETY <br />August 22, 2002 Bill Owens <br /> Governor <br />Dan Fodor Greg E. Wakher <br />P.O. Box 127 Executive Director <br />Raton NM 87740 Ronald W. Cattany <br /> Acting Division Director <br />RE: Mine Progress Map, Golden Eagle Mine (Maxwell Mine) <br />Mr. Fodor: <br />Please find enclosed the map you requested of the mined, underground area for the Golden <br />Eagle mine in Las Animas County, Colorado. There is no charge for the map. <br />The rectangular areas depicted with a light blue pattern are longwall panels that were mined. <br />Mined coal thickness was approximately 8 feet and subsidence at the surface was 3-5 feet. <br />Typically, longwall subsidence manifests itself relatively quickly following mining and decreases <br />to a negligible amount within a few years. <br />The development entries are shown with a dashed line depicting areas of planned mining and a <br />solid line used for those areas where development mining was completed. Subsidence over <br />areas mined by development mining, especially where those areas are more distant from <br />longwall mined areas, is unpredictable and may occur sporadically, or possibly not at all. I <br />highlighted the termination of development mining in the upper center of the map. <br />Section corners are shown in purple and may be used to transpose features to a standard <br />USGS or other map that shows sections. <br />If you have any questions, please call me. <br />Sin ely, <br />K Gorham <br />Environmental Protection Specialist II <br />