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SI~Y_ <br />WSC/FPD-~ 303 832 8106;# 1/ 2 <br />United States Department of the Interior <br />OFFIGE OF SURFACE MINING <br />RECLAMATION AND ENFORCEMENT <br />BROOILS TOWERS <br />102015TH STREET <br />DENVER. COLORADO 80202 <br />December 8, 1989 <br />OVI IONAL FONN 99 (r_ppl <br />2-21-96 ;10~57AM ; <br />Ms. Barbara Sudler <br />State Historic Preservation Offic <br />1300 Broadway <br />Denver, Colorado 80203 <br />ATTENTION: Jim Green <br />IIIIIIIIIIIII III <br />sss <br />In Reply Refer To: <br />FAX TRANSMITTAL .aFp«~ <br />lee ran - <br />i.. ~ ~ <br />awro•~=r NION . <br />N8N 15.Q 01 3t'I.-Tlee SOYB-lql OENEReI EFRNC45110MINIMR.npN <br />RE: MT. Gunnison Mine $i- Modification <br />Dear Ms. Sudler: <br />ARCO Coal Company is planning to modify its Mt. Gunnison ~1 <br />underground mining plan to include the extraction of a lower, <br />second, seam of coal (B Seam). This coal will be taken from a <br />portion of their approved Mt. Gunnison ii permit area. In <br />addition, they wish to add 36 acres to the permit area to allow <br />underground entry to the B seam. <br />No surface modifications are planned for the additional 36 acres <br />(located in sections 29 and 30 T135, R90W as shown on enclosed <br />map) nor in connection with the mining of the B seam. The second <br />seam (B seam) mining plan is to utilize longwall mining <br />techniques while the approved upper F seam mining will continue <br />to use room and pillar methods. The lower seam mine area lies at <br />least 400 feet below the upper seam mine area, which in turn lies <br />at least 400 feet below the surface. Subsidence effects are <br />expected to be minimal for most of the permit area. The area most <br />likely to experience maximum subsidence is located in the E1/2 <br />and E1/2 of the W1/2 of section 20, T13S, R90W, where both the <br />seams will be mined. Subsidence in this area may be up to 10 <br />feet, though leas 1s expected. <br />The Mt. Gunnison Mine (fl permit area has received your attention <br />several times in the past, as evidenced by your letters dated <br />June 1 and"~duly..l 1, 1977. These indicate that the SHPO and the <br />State Archaeologist were satisfied with the archaeological <br />reconnaissance survey of 460 acres conducted for the area by <br />Applegrath and Hurlbert. Neither of the too historic occupation <br />sites recorded by the survey (5 GN 036 and 5 GN 037) will be <br />impacted (even by subsidence) by the project. In August, 1982 an <br />additional 30 acres of land potentially disturbed by drilling and <br />road construction were intensively surveyed by the Grand River <br />Institute. The inventory located no cultural resources (report <br />enclosed). In August, 1985 we received a "no effect" <br />determination Prom your office for a 320 acre expansion of <br />