Laserfiche WebLink
The room and pillar sections will be laid out with amultiple-entry development system. A series of <br />rooms and crosscuts will then be mined from the main entries on a spacing to be determined by the <br />prevailing geological conditions. Coal will be cut by continuous miners. <br />After a panel of rooms has been completed, and if conditions allow, the intervening pillars will be <br />extracted, retreating toward the mains. The extraction of most of the pillar coal on the retreat will result <br />in caving of the roof some 50 to 100 feet behind the active mining area. Upon completion of a room <br />and pillar section, the caved area will be sealed off and protected with adequate barrier pillars. <br />The mine layout and the mining systems planned for the Deserado Mine are designed to maximize the <br />recovery of coal in the safest and most environmentally acceptable manner. <br />III.A.7 Subsidence <br />III.A.7.a Subsidence Area Survey. BME intends to mine coal from Federal Leases C-023703, <br />D-047201, C-0126669, C-8424, C-8425, C-44693 and COC-51551. Map 1 shows the proposed permit <br />boundary and surface facilities. Map 2 shows the mineral and surface ownership in and adjacent to the <br />permit boundary. The surface within the permit area lies within a semiarid region whose main use is <br />winter livestock grazing and wildlife habitat. <br />A detailed pre-construction survey of the property found that six building sWctures and a county road <br />existed within the permit boundary. These structures were located adjacent to the abandoned Staley <br />Gordon Mine. The structures were a mine tipple, bam, change house, power house, fan house and <br />scale. The change house and power house were demolished as part of the Ventilation Entry <br />construction. The other four structures were demolished in 1986. Rio Blanco County Road 65 crosses <br />the permit area from SE to NW. During construction, numerous structures and facilities were built <br />within the permit area. These facilities are shown on Map 1. Surface facilities are discussed in <br />Sections 111.6 and III.C. <br />Portions of reconstructed County Road 65, the Refuse Haul Road and the 138-kV powerline cross <br />above an area that is expected to experience subsidence from longwall mining. During the active <br />subsidence, these facilities will be monitored and corrected as described in Section III.A.7.h, Damage <br />Mitigation. Also, Lincoln Reservoir and Halandras Reservoir No. 1 overlie areas that will subside. They <br />will be repaired as necessary. <br />Permit Renewal #3 (Rev, 8199) III-9 <br />