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C TWBNTYM166 <br />~ COAI. COMPANY <br />A Cyprus Amax Company <br />October 17, 1997 <br />Janet Binns <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />I: 13 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />iiiiiiiiiiiiiiuiii <br />AFCEIVED <br />OCT 2 3 1997 <br />plvisiC^ at t,unet~i5 '~ GCCIO~Y <br />Twentymile Coal Company <br />29515 Routt County Road N27 <br />Oak Creek, Colorado 60467 <br />970-879-3800 <br />12e: Permit No. C-82-056: Minor Revision 97-155 -Additional Drill Hole at Rock Dust Tanks <br />Dear Ms. Binns: <br />Enclosed are an Application Form, new permit pages 2.05-16Q) and 2.05-54(8(71) for[he above Minor <br />Revision. This revision will allow for the installation of a line for rock dust transfer from the surface tanks <br />to the underground mine workings. A blockage is preventing [he transfer of rock dust down the existing <br />hole. <br />Calculations for the change in bond due to this project are provided on new permit page 2.05-54(tl(71). <br />"fhe total increase in bond for [his project is $2,124.00. Twentymile Coal Company currently maintains <br />sufficient excess bond to cover this addition. <br />Thank you for your cooperation in this matter. If }'ou have any questions or require further information, <br />plzase contact meat (970) 870-2750. <br />TWENTYMILE COAL COMPANY <br />~~7 <br />I"avis D. Rogers, P.E. <br />Environmental Engineer <br />Enclosures <br />/tdr <br />