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2.05.6(6) <br />subsidence crack causing a hazard to foot or vehicle traffic. Repairs to the <br />roads and trails will be performed by appropriate earth -moving equipment. <br />Typically, roads and trails are maintained on an annual basis, as required, to <br />access environmental resources monitoring stations. Persons using trails will <br />be notified of any hazards. Those persons are typically the Operator's <br />employees, hunters and monitoring personnel. Terror Creek Road is outside <br />of the projected angle of draw so no damage is predicted. <br />The Hughes' cabins are both located in limited extraction zones so the mining <br />operation will not have any effect on the cabins. Additionally, the cabins are <br />outside of the projected angle of draw so no damage is predicted. <br />The Operator's cabins are located over deep overburden. The cabins could <br />be damaged by subsidence. The Operator is willing to risk the damage to its <br />cabins in order to extract the coal under them. The Morrell and Chambliss <br />structures are located well outside the angle of draw and over deep <br />overburden so no damage is predicted. <br />The Jess Barrow Homestead Cabin could be damaged by subsidence. The <br />log structure and roof are flexible so they should not be affected by the <br />strains induced by subsidence. However, the concrete chinking and wooden <br />lathe nailed in between the logs could be affected. <br />It is not expected that subsidence will affect the stability of old landslides to <br />the extent that their deformations could be renewed. Attention will have to be <br />paid to mining close to the coal outcrop. The Operator will leave one row of <br />development pillars between the outcrop and extracted pillars within the <br />panel. No repairs are currently required, but procedures could be developed <br />if studies show outcrop barrier pillar problems are anticipated. <br />Differential vertical settlement due to subsidence over a short distance could <br />result in local changes in ground surface and slopes. If such changes occur <br />along an ephemeral or intermittent stream channel, the stream's gradient will <br />TR -100 2.05-153- 03/15 <br />