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MINING PLAN AND MINING PLAN MODIFICATION INFORMATION <br />BACKGROUND INFORMATION <br />USGS 7.5 minute Quadrangle location map(s): Rattlesnake Butte, Cow Creek, Oak Creek, Dunkley, <br />Milner, and Mount Harris. <br />Year mine began production: 1983 <br />Current permit acreage: 22,447 (corrected) <br />Current surface disturbed acres: 498.1 <br />Total acres of Federal coal within the current permit: 7,530 <br />Total acres of Federal surface land within the current permit: 6,070 <br />Recoverable tons of Federal coal remaining in the current permit: 10,292,940 (does not include pending <br />federal lease application for approximately 500 acres, containing approximately 1,348,000 <br />recoverable tons) <br />Average annual production rate: 10 mmtpy <br />Maximum production rate: 12 mmtpy <br />Coal seam(s) mined: Wadge <br />Average annual employment: 480-500 <br />Life-of-Mine in current permit: Approximately 7-15 years, dependent on feasibility of developing <br />additional coal reserves and coal market conditions <br />Current Post mining land use: Pastureland, Rangeland, Wildlife Habitat <br />PROPOSED ACTION INFORMATION - Revision involves extension of mining in existing mining <br />district (Northern Mining District) into Federal reserve block (COC-67514) that has not been <br />previously mined, and extension of mine development into new mining district (Western Mining <br />District) where Federal, State, and fee coal reserves have been previously mined (previously mined <br />in Southwestern Mining District). Revision does not involve any change in reserves, permit area, <br />surface disturbance, mine production levels, or mine employment. <br />Total change in permit acreage: 0 <br />Change in surface disturbed acres: 0 <br />Change in acres of Federal coal: 0 <br />Change in Federal surface land acres: 0 <br />Change in recoverable tons of Federal coal: 0 <br />Change in average annual production: 0 <br />Coal seam(s) to be mined: Wadge <br />Change in annual employment: 0 <br />Change in Life-of-Mine: 0 <br />Reclamation bond amount: $7,772,999.00 <br />Change in post mining land use: None <br />Legal description for Federal lease(s) to be mined: New mining in COC-67514 - TSN, R86W, 6`h PM, <br />Section 5 Lot 4, SW'/NE1/, S%NW1/, and NW'/4SE%, Continued mining in COC-20900 and C- <br />081330