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Peab 0
<br />1111 ENERGY
<br />Twentymile Coal, LLC
<br />RECEIVED
<br />MAY 12 2016
<br />DIVISION OF RECLAMATION
<br />MINING AND SAFETY
<br />Mr. Phillip Courtney
<br />Colorado Board of Land Commissioners
<br />Centennial Building - 1127 Sherman Street, Room 300
<br />Denver, Colorado 80203-2283
<br />29515 Routt County Road 27
<br />Oak Creek, CO 80467
<br />970.879 3800
<br />Re: Twentymile Coal, LLC — Foidel Creek Mine, Notification of Planned Mining Activities
<br />Dear Mr. Courtney:
<br />May 10, 2016
<br />Twentymile Coal, LLC (TC) is the owner, operator, and permittee under Permit No. C-1982-056 for the Foidel
<br />Creek Mine (Mine), located approximately twenty miles southwest of Steamboat Springs, Colorado. Mining and
<br />related activities are permitted through the State of Colorado - Division of Reclamation, Mining, and Safety
<br />(DRMS). TC has received the required permit approvals and has initiated development activities for mining Panels
<br />WC5-Right through WC 9 -Right of the Wolf Creek Coal Seam under portions of Sections 9, 10, 11, 12, 13, 14, 15,
<br />16, 17, 20, 21, and 22, T5N, R86W, as shown by the attached figure. The initial development activities are not
<br />expected to result in any ground surface subsidence, however, as ongoing development activities are completed, TC
<br />will initiate longwall mining activities. These activities will result in surface subsidence and may result in limited
<br />associated subsidence effects. Longwall mining will be initiated in Panel WC9-Right, under Section 11, T5N,
<br />R86W (State and Sage Creek Holdings surface ownership) in late August or early -September 2016, and long-term
<br />mining in the Wolf Creek Reserve (subject to additional permit approvals) could extend through 2031 and include
<br />additional areas in Sections 3, 4, 8, 23, and 24, T5N, R86W.
<br />The only surface structures or facilities that would potentially be impacted by mining -related subsidence associated
<br />with mining in the Wolf Creek Coal Seam would be the Union Pacific Energy Spur, County Road 33, and the
<br />Yampa Valley Electric powerline paralleling RCR33. The powerline was constructed within an easement from TC
<br />which provides for and addresses any subsidence -related impacts. TC also has existing valid agreements with the
<br />Union Pacific Railroad and Routt County addressing monitoring and repair of any surface subsidence which may
<br />adversely impact the function and operation of the rail -line and road. With the exception of the noted structures,
<br />the overlying lands are generally utilized as rangeland for livestock grazing. Based on both detailed subsidence
<br />projections and the long history of longwall mining in the area, surface subsidence effects are expected to be
<br />minimal and would not adversely affect the existing land uses.
<br />Detailed information on anticipated subsidence effects and mitigation is provided in Section 2.05.6(6) of TC's
<br />Mining and Reclamation Plan permit document, copies of which are available for review at the mine -site, the
<br />offices of the CDRMS, and the ROutt County Clerk ad Recorder's Office. The following are relevant contact
<br />numbers and addresses:
<br />Twentymile Coal, LLC Colorado Division of Reclamation, Mining, and Safety
<br />29515 RCR27 1313 Sherman Street — Room 215
<br />Oak Creek, Colorado 80467 Denver, Colorado 80203
<br />(970) 870-2712 (303) 866-3567
<br />Thank you for your consideration and interest.
<br />Sincerely, or
<br />Jerry M. Nettleton / '0
<br />Manager Environmental Aff
<br />Twentymile Coal, LLC
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