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Subsidence Handbook Volume III, Exhibit 15 <br />• ROADS AND TRAILS <br />Introduction <br />Various access trails have been constructed for past exploratory drilling and existing <br />hunting use. These trails are not surfaced and have limited access to traffic. The trails are <br />used for continued monitoring of environmental resources. <br />Worst-Case Damage <br />A subsidence crack could develop along trails and light use roads, causing a hazard to <br />traffic. Large rocks could fall or roll onto trails and light use roads causing temporary <br />closure of the roads or tails and posing a hazard to traffic and personnel. <br />Pre-Damage Monitoring <br />Bowie Resources will monitor conditions of low-traffic trails as persons travel on unusual <br />environmental resource monitoring. Any problems will be noted and documented in the <br />"Annual Subsidence and Hydrology Report". <br />Any subsidence-induced problems identified by the trail users will be documented. The <br />vast majority of trails have been constructed and are used by Bowie Resources. This is <br />especially true in the first permit term. <br />Post-Damage Monitoring <br />Post-Damage monitoring will be conducted like pre-damage monitoring. <br />Mining Techniques <br />Longwall or conventional room-and-pillar mining with pillar extraction will be used <br />throughout the permit area. This will have little effect on access trails. <br />Repair Procedures <br />Repairs will be completed by appropriate earth-moving equipment when damage occurs. <br />Typically, the trails are maintained on an annual basis, as required, to access <br />• environmental resource monitoring. Rockfall will be removed from roads and trails as soon <br />TR 3 I 43 02/04 <br />~ pP~o uED s~r~~o y <br />