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INTRODUCTION <br />This report is a compilation of all available inactive coal mine data and extent of mining outlines for <br />twelve (12) Colorado Front Range counties: Adams, Arapahoe, Boulder, Douglas, Elbert, El Paso, <br />Fremont, Huerfano, Jefferson, La rimer, Las Animas and Weld (Figure 1). These data and maps are <br />intended to be used as tools for land use planning by planning agencies, consulting firms, developers <br />and concerned citizens. This information can be used not only for the location of inactive and/or <br />abandoned coal mines, but also for mine data and information that will help make preliminary <br />evaluations of potential subsidence hazard and/or fire hazards associated with a given mine or area. <br />Data for the inactive coal mines is listed in two tables and on twelve county plates. Table One is a <br />compilation of basic mine data. This information includes: mine name(s), location, dates of <br />operation, depth of mining, thickness of coal, production in short tons, other unique information <br />pertaining to each mine and references used in obtaining the information. These references are <br />numbered and refer~to the bibliography. These references are intended to provide easy access to <br />detailed information for specific site or mine investigations. <br />The unique features column in Table One indicates if specific field checked or unique information is <br />available for a mine. Table Two contains explanations of this information; such as specific <br />information on the condition of mine openings, existing subsidence information, mine drainage, and mine <br />fires available for the mine. In some cases other comments are included where it was felt that the <br />information would assist in evaluating the present condition of the mine, or mine site. These comments <br />include the dates of gas or dust explosions, if multiple seam mining took place and reclamation <br />information. <br />The extent of mining maps are printed on U.S. Geological Survey (USGS) county map series bases with <br />each county placed on an individual sheet. The 1:50,000 scale base allows an overview of mining in <br />each county. Not only are the extent of mining outlines shown, but mine names, openings and any <br />associated unique features (information noted in Tables One and Two). Each map sheet contains an index <br />of the county location and an index of the map area location within the county boundaries. <br />The basic mine data of Table One comes from the Colorado Division of Mines, coal mine production <br />records (Reference 3); and Colorado Coal Reserve Depletion Data and Coal Mine Summaries by D. C. Boreck <br />and D. R. Murray (Reference 2). The specific field checked information on unique features noted in the <br />tables and maps comes in the most part, directly from work done by Ameudo and Ivey for the Colorado <br />Mined Land Reclamation Division, Inactive Mines Program in 1981 (Reference 1). The extent of mining <br />outlines also come in part from Ameudo and Ivey work for Colorado Mined Land Reclamation (Reference 1), <br />from mine maps on file with the Colorado Division of Mines (Reference 3) and work done by A. Meyers for <br />Colorado Mined Land Reclamation (Reference 7). Table One lists these and other References used in <br />compilation of the tables. <br />-3- <br />