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~ 'I~VENTYM166 <br />~ COA6 COMPANY <br />A Cyprus Amax Company <br />September 1 I, 1996 <br />iii iiiiiiiiiiiuiii <br />999 <br />Mr. Kent Gorham <br />Envirorunental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver. Colorado 80203 <br />Twentymile Coal Corporation <br />29515 Routt County Road !{ 27 <br />Oak Creek, Colorado 80467 <br />970-879-3800 <br />r,rrGl\IED <br />SEP 13 1996 <br />Division of ,Nmerals ~ Ceolcgv <br />Rc: Permit No. C-82-056: Minor Revision 96-139, Phase II Seismic Exploration <br />and Mine Water Return Line <br />Dear Mr. Gorham: <br />Twen[ymile Coal Company (TCC) is requesting an extension of the approval period for <br />Minor Revision 96-139. Since submittal of this Minor Revision, an extension of seismic <br />line 2 has been Alarmed. Seismic line 2 will be extended L25 miles to the east. The <br />extended line will be surveyed and the archeological study of the extension performed by <br />September 12. We are requesting an extension until September 30, 1996. <br />Thank you for your cooperation in this matter. If you have any questions or require <br />further information, please contact me at (970) 870-2750. <br />TWENTYM[LE COAL COMPANY <br />Tavis D. Rogers <br />Environmental Specialist <br />/td r <br />