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SU`L`SARY 1 <br />This report contains the documented approval and conditions for approval <br />for mining within 500 feet of an abandoned underground mine. These <br />approvals are required by the Surface Aiining Control and Reclamation Act <br />of 1977, Public Lav 95-87, Section 515(b)(12)(A) and the regulations of <br />the Colorado Hued Land Reclamation Board for Coal `fining (1980), <br />Section 4.19. <br />GENERAL <br />The Edna Surface Hine, located about 3 miles north of Oak Creek, has <br />been in operation for more than a decade. The proposed mile permit area <br />is underlain with several abandoned mines as indicated by the map in <br />attachment A. This map lists nine abandoned sines with [helr dates of <br />closure, that are located in this area. Only three sines - the Zeystone <br />dine (1965), the Hayden Mine (1951) and the Arcowhead `tine (L940) - are <br />associated with this approval. Supplied information about these nines <br />and a copy of the geologic column of the area is contained in attach- <br />ment B. These abandoned mines are located in the Lower coal 3roup, <br />which contains the Yo. 1, tlo. 2 and ;do. 3 coal beds. The Edna Surface <br />Mine is located in the Gfadge coal bed - a 6 Eoot coal seam of the middle <br />coal group - that is vertically separated from the lower coal group by <br />about 900 feet. <br />CONCLUSION <br />The proposed surface mining permit area submitted for approval contains <br />several abandoned underground coal mines. The full extent of the abandoned <br />workings may not be known. However, the vertical separation (about <br />900 feet) between the operating surface mine in the Wadge seam, and the <br />abandoned underground mines in [he lower group, precludes any apparent <br />subsidence hazards. <br />RECOMHEWATION <br />Subject to the submitted plan (attached), blasting approval is hereby <br />granted for the Pittsburgh and Hidway Coal Mining Company, I.D. <br />No. OS-00303, for mining the proposed area. <br /> <br />Ri' and L. Fischer <br />P sic al Scientist <br />Approved: <br />~w..-Q.~ ~,,,~Qr Date /D-Zg-B <br />Donald Hutchi son <br />Chief, Industr~lal and Electrical Safety Division <br />REVISED 11/81 _ , .. 3 <br />