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<br />Peabody <br />Twentymile Coal, LLC <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />® 970.879.3800 <br />Mr. Jason D. Musick u February 17, 2011 <br />Environmental Protection Specialist r 2011 <br />Division of Reclamation, Mining, and Safety t ` ia?airion, <br />1313 Sherman Street - Room 215 <br />Denver, Colorado 80203 M1ning andl°? <br />(970) 866-3567 X8134 <br />Re: Twentymile Coal, LLC - Foidel Creek Mine (C-82-056),2010 Annual Reclamation Report <br />Dear Mr. Musick: <br />Enclosed are duplicate copies of the 2010 Annual Reclamation Report (ARR) for the Foidel Creek Mine. <br />During 2010, a number of permitted activities occurred under Permit, Technical, and Minor Revision approvals <br />(summarized as follows), with most of the permitted activities occurring within existing disturbance areas (no <br />change in acreage unless otherwise noted): <br />RN08-05, Permit Renewal (approved 06/19/10) <br />TR09-70, 18-Left Mine Water Transfer Pipeline (approved 02/09/10, + 75.2 acres disturbed/affected) <br />TR09-71, Western Mining District Development and Longwall Mining Mods (approved 01/12/10) <br />TR10-72, Coal Refuse Disposal Area Drainage Modifications (approved 05/03/10) <br />TRIO-73, 19-Right Mine Dewatering Installation (approved 07/22/10, +7.5 acres disturbed/affected) <br />TR10-74, 18-Left Mine Water Transfer Pipeline Acreage Adjustment (approved 08/20/10,-75.2 acres <br />and +7.5 acres disturbed/affected) <br />TR10-75, Security Installation Drainage Modifications (approved 09/02/10) <br />TR10-76, Ditch G-6 Extension (approved 12/20/10, +0.3 acres disturbed/affected) <br />MR 10-241, Operator Name Change (approved 03/05/10) <br />MR 10-242, 6-Right Temporary Thickener Underflow Pipeline (approved 06/01/10) <br />MR10-243, Replacement Thickener Underflow Borehole (approved 06/08/10) <br />MR10-244, Security Installation Modifications (approved 06/19/10) <br />MR10-245, Security Installation Drainage Modifications (withdrawn and re-submitted as TR10-75) <br />MR10-246, Fueling Station Upgrades (approved 08/27/10) <br />MR10-247, Northwest Mains Rock-Dust Installation (approved 10/14/10) <br />MR10-248, 6-Right Thickener Underflow Pipeline Crossing (approved 11/03/10) <br />MR10-249, 18-Left Utility Boreholes (approved 11/18/10) <br />MR10-250, 18-Left Compressor Building (approved 12/16/10) <br />Changes in permitted disturbed and affected area acreages during 2010 included an increase in the permitted <br />disturbed and affected acreage of 15.3 acres (TR09-70, TRIO-73, TRIO-74, and TR10-76). The total permitted <br />acreage did not change, however in conjunction with the Mid-Term Permit Review, review and reconciliation <br />the total permitted, affected, and disturbed acreage figures resulted in minor adjustments to these figures. <br />Actual surface disturbance during 2010 was about 7.8 acres less than permitted disturbance, given that work on <br />the 19-Right Mine Dewatering Installation and Ditch G-6 Extension have not yet been initiated. Additional <br />permitted disturbance during 2010 resulted in a cumulative total for permitted surface disturbance of <br />approximately 609.4 acres. Please refer to the revised maps and text associated with the revisions referenced <br />above, for specific details.