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CHAPTERFOUR Environmental Consequences and Mitigation <br />collect it if warranted. If ground-disturbing activities cannot be immediately suspended, the <br />operator shall work around or set the discovery aside in a safe place to be accessed by the BLM- <br />permitted paleontologist. <br />Alternatives Carried Forward for Further Consideration <br />Grade-Separated Crossing at CR M.8 <br />Impacts and mitigation associated with construction of the railroad crossing would be identical to <br />those described in the proposed action section. <br />Four-Quadrant Traffic Control Devices <br />No impact to the paleontological resource is anticipated. <br />Transmission Line Alternative A <br />Impacts and mitigation associated with construction of the transmission line would be identical <br />to those described in the proposed action section. <br />Transmission Line Alternative B <br />Impacts and mitigation associated with construction of the transmission line would be identical <br />to those described in the proposed action section. <br />Transmission Line Alternative C <br />Impacts and mitigation associated with construction of the transmission line would be identical <br />to those described in the proposed action section. <br />4.2.4 Geology <br />No Action Alternative <br />If the No Action Alternative is selected, coal would not be disturbed by exploration or mining. <br />The coal resource and the structural and lithologic integrity of the least tract would remain in <br />place. The potential to recover the coal resource at some time in the future would remain. <br />Proposed Action Alternative <br />Mine and Facilities <br />Coal would be mined by longwall and/or room and pillar techniques. After coal recovery, the <br />overburden would be altered due to subsidence. A gradual lowering of the surface would occur <br />due to the subsidence after the extraction of the coal. Amore detailed description of the <br />potential subsidence impacts is presented in Appendix C, Subsidence. <br />Rock falls at the outcrop could occur, but the historic burning of the coal along the outcrop <br />would preclude a significant amount of mining close to the outcrop. Therefore, rock falls <br />induced by mining would be unlikely. <br />4-65 <br />DBMS 620 <br />