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Peabody <br />Twentymile Coal Company <br />November 14, 2007 <br />Mr. Daniel I. Hernandez <br />Senior Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />(303) 866-4933 <br />RE Nov 1 1007 <br />pivision of and Safety n, <br />Minln9 <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />Re: Twentymile Coal Company - Foidel Creek Mine (Permit No. C-82-056), Minor Revision (MR07- <br />225) -18RT Shaft Heater Installation <br />Dear Mr. Hernandez: <br />Twentymile Coal Company (TCC) requests CDRMS approval of a Minor Revision to our approved Permit <br />for construction/installation, operation, maintenance, and reclamation of a shaft heater installation for the <br />18-Right (18RT) Shaft. Installation of the shaft heater will allow for heating of ventilation intake air during <br />the winter months to maintain safe and comfortable temperature and humity conditions in underground mine <br />work areas. The planned 18RT Shaft Heater Installation will be constructed entirely within the existing <br />18RT shaft pad area, will result in no new surface disturbance, and will not affect existing drainage and <br />sediment control structures. Construction will involve: <br />• Extension by Yampa Valley Electric Association of their existing service-lines to the shaft location <br />(line extensions will be constructed by YVEA on fee lands, and YVEA will own, maintain, and be <br />responsible for removal of the lines at such time as they are no longer needed) <br />• Installation of two power-distribution drop-poles on the existing shaft pad <br />• Placement and anchoring of a pre-fabricated propane-fired heater unit and associated duct-work on <br />the existing reinforced concrete shaft collar structure <br />• Installation of a buried power cable feed between the existing emergency hoist house and the shaft <br />heater <br />• Installation of a skid-mounted propane tank and connecting line(s) on the existing shaft pad in <br />proximity to the shaft heater <br />At such time as the 18RT Shaft Heater Installation is no longer needed to support ongoing or future mining <br />and related operations, the heater installation components will be disassembled and salvaged for re-use or <br />will be demolished, and the associated disturbance areas reclaimed as part of final reclamation for the 18RT <br />Shaft installation. <br />This submittal includes revised PAP text, exhibits, and maps, addressing the location, configuration, <br />operation, maintenance, and reclamation of the proposed 18RT Shaft Heater Installation. New and revised <br />PAP materials are identified by the attached Summary of Revisions/Additions. TCC would like to proceed <br />with this project as soon as possible, so that construction can be completed under favorable weather and <br />G: \Environmental\REVISION\MINOR-RV\MR07-225 18RT Shaft Heater Installation\MR07-225 18RT Shaft Heater <br />TL. doc