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Land Use Land use of the surface ie comprised of cropland, pastureland, rangeland and disturbed areas associated with past mining activity. Routt County Road No. 27 (paved) traverses the proposed lease area. There are easements for Yampa Valley fileetrie Association (YVEA) powerlinee (69 kV, 7.2 kV) and a U.S. Waet buried telephone cable. There are three dwellings on the Brea which are owned by the Cyprus Coal Company or an affiliate. Hazardous or Solid Waetee Many potentially hazardous or solid wastes are used in the day-to- day operations of an underground mine. Daily uses of reportable substances are below reportable quantities (R. Mills, verbal communication 3/15/93). IV. LNVIRONIDaR'AL COPSEODID7Cfi8 A. Proaoaed Actioa Alternative No significant impacts are anticipated to climate, air quality, geology, or Visual resources ae a result of implementing the proposed action. Minerals Coal: Ae much of the Wedge coal seam would be mined ae ie economically and technologically feasible. This would meet the requirement of maximum economic recovery and fully develop the resource; leaving none to be wasted. Oil and Gae: The gee well No. 6-36 may be damaged if subsidence causes the well casing to fracture. If the casing ie fractured, gee could leak out of the well bore and into the formation, resulting in a lose of production and royalty and possible contamination of the surrounding formations and aquifers. The gee could also seep back along the fractures into the mine,. creating a safety hazard in the mine. These could constitute significant adverse impacts. All of these impacts, however, could be mitigated by plugging the 6-36 well in advance of mining. CWCC plane to plug and abandon the well before the longwall mouse into the final panel. There would be no significant impact to development of oil and gee resources ae a whole because the area is small enough to be intentionally drained through off lease wells or developed in the future when the proposed coal lease has been mined through. Future development of federal lease C-39036 would be dependent upon negotiations between the oil and gee and coal lessees. BLM has the authority to grant suspensions of operations or other actions to facilitate such negotiations. Hvdroloov DMG has reported that there ie no noticeable surface-cracking associated with the past development of the Foidel Creek Mine. This ie largely explained by the presence of a thick, plastic shale underlying the surface (the Marine Shale Member of the Williams Fork Formation). This shale allows the subsurface to flex and bend considerably, which typically reduces the amount of deformation 12