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bLoPeabo-a'y <br />Twentymile Coal Company <br />18RT Shaft Heater <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />• Installation of a shaft heater and ducting similar to the permanent shaft heaters at 6MN (modification <br />from original design), and installation of concrete pads and saddles to permanently mount the <br />existing propane tank. The shaft heater will still be mounted on the existing concrete shaft pad <br />extension. <br />At such time as the shaft heaters are no longer needed to support ongoing or future mining and related <br />operations, the heater installation components will be disassembled and salvaged for re-use, heater and tank <br />pads will be demolished and the resulting demolition debris either removed from the site or buried as part of <br />the shaft fill material, and the associated disturbance areas reclaimed as part of final reclamation for the <br />ventilation intake shaft installations. <br />This submittal includes revised PAP text, exhibits, and maps, addressing the location, configuration, <br />operation, maintenance, and reclamation of the proposed 6MN and 18RT shaft heater installations. New <br />and revised PAP materials are identified by the attached Summary of Revisions/Additions. TCC would like <br />to proceed with this project as soon as possible, so your assistance in expediting the review and approval <br />process will be greatly appreciated. After you have opportunity to review the accompanying information, <br />please feel free to contact me with any questions or to discuss submittal materials or related matters. <br />Best regards, <br />Twentymile pany <br />Jerry M. e eton <br />Enviro tal Manager <br />cc: Mike Berdine/TCC <br />G:\Environmental\REVISION\MINOR-RV\MR09-234 Shaft Heater Modifications\MR09-234 Shaft Heater <br />Modifications TL.doc