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TWBNTYMI6S <br />COAT. COMPANY <br />A Cyprus Amax Company <br />~iiiiiiiiiiiiiiuiii <br />Twentymile Coal Corporation <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />970-879-3800 <br />,lone 12. 1997 <br />RECEIVED <br />'anet Bi°ns JUN 2 01997 <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />131 ;Sherman Street, Room 215 DIViSiOn of Minerals th la'®GloeY <br />Denver, Colorado 80203 <br />Re: Pcrmit No. C-82-056: Minor Revision 97-148 -Facilities Additions 6/97 <br />Dear Ms. Binns: <br />Enclosed are revised permit pages, new permit pages, revised tables, and revised maps for Minor Revision <br />97-148. This revision addrzsses the addition of an access road from the loadout coal stockpile to the waste <br />pile, expansion of equipment storage area, the installation of four additional culverts, a light use road at the <br />stoker pad, and a concrete pad under [he stoker [ruck loadout. SEDCAD+ runs are provided for [he <br />culverts at the access road, east of the warehouse, and under the overland belt.. The culverts at the stoker <br />truck turn around area are at the top of the drainage break and are intended to prevent excessive rutting of <br />the ditch line on the north side of [he east end of [he parking area. Drainage in this area is minimal, so 8" <br />cuh-arts should be more than adequate to pass the Flows in this area. <br />Calculations for the change in bond due to these additions are provided on new permit pages 2.05-54(f)(68) <br />and 2.05-i4(f)(68a). The total increase in bond for this project is $4,393.00. Twentymile Coal Company <br />currenth~ maintains sufficient excess bond to cover these additions. <br />'t'hank you for your cooperation. If you have any questions or require further information, please contact <br />me at (970) 370-2750. <br />TWENTYMILE COAL COMPANY <br />~~ ~~ <br />Tavis D. Rogers, P.E. <br />Environmental En,ineer <br />Enclosures <br />/tdr <br />