2011-11-07_REVISION - C1982056 - Laserfiche WebLink

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Peabod III 1111 ENERGY Twentymile Coal, LLC Mr. Jason Musick Environmental Protection Specialist Colorado Division of Reclamation, Mining, & Safety 1313 Sherman Street, Room 215 Denver, Colorado 80203 (303) 866 -3567 x 8134 Jason: Best rega Tw oal, LLC ettleton7 ■■ Env e ental Manager ike Berdine /TC sco _ �s�11 C.P ilsko% v ukCNa Sa 29515 Routt County Road 27 Oak Creek, CO 80467 970.879.3800 October 25, 2011 RE: Foidel Creek Mine (Permit No. C -82 -056) - Minor Revision (MR11 -258), 15 -Left Powerline Twentymile Coal, LLC (TC) requests CDRMS approval of the subject Minor Revision to the approved Permit to install powerpoles and construct power distribution lines to serve the 15LT Ventilation Borehole (TR11 -77). The proposed powerline construction project is necessary to supply power for the rock -dust installation at this location and a possible future ventilation fan, and will result in minimal new surface disturbance. The project will involve placement of approximately forty new powerpoles and associated powerline construction (approximately 8,550 feet) between the existing 18LT electrical substation and the new 15LT facilities pad. The 18LT Substation (Primary Substation 14) is a primary distribution substation located adjacent to RCR27 on the 18 -Left Shaft pad, which converts incoming power from 69KV to 4160 volts and 440 volts and transfers the power through overhead distribution lines to several equipment installations at the 18LT location. Power for the 15LT Ventilation Borehole will be converted to 12.5KV and transferred by the new powerline. Powerpole installation will involve the use of existing roads or limited overland access to the individual pole locations, localized shallow auger drilling to set each pole, pole placement and anchoring, and distribution of the limited drill cuttings over the small area surrounding each pole. Given the very limited temporary disturbance involved, TCC does not propose topsoil recovery or reseeding for the individual powerpole locations. It should be noted that pole locations have been selected specifically to avoid stream buffer zones or other sensitive areas. Constriction of the distribution lines will involve the use of existing roads or limited overland access by a bucket truck and cable truck to install cross -bars, insulators and conductors. All cross -bars will have installed raptor deterrents, consistent with approved raptor protection guidelines. Powerline installation will not affect existing drainage systems, given the minimal surface disturbance and very temporary nature of the activities involved. This submittal includes revised PAP text and maps /drawings addressing the location of the proposed powerline construction activities. New and revised PAP materials are identified by the enclosed Summary of Revisions /Additions. TCC would like to proceed with this project as soon as possible, therefore we appreciate your consideration and cooperation in facilitating timely review and approval. Once you have had opportunity to review the accompanying information, please feel free to contact me with any questions or to discuss related matters.