Laserfiche WebLink
<br />4.0 OWNERSHIP <br />• The surface and coal is owned by different entities but SCC holds coal leases on those areas proposed <br />to be highwall mined. Refer to Exhibit 3-1 in Tab 3 of the permit application package for any details. <br />5.0 OPERATION PLAN <br />SCC is proposing to Mghwall mine the Wadge and Wolf Creek coal seams as shown on Exhibit 12- <br />lA, Operations Plan Mining. Highwall mining at Yoast will start in the north end of the currently <br />active pit. <br />1 HIGHWALL MINER PLAN <br />1. The area will be surface mined according to the approved, existing mine plans. <br />2. After overburden and coal removal is completed, some highwalls and endwalls will be <br />highwall mined, see Exhibit 12-1A, Operations Plan Mining. It should be noted that the area <br />as shown in Exhibit 12-1A is the projected final highwall location, and highwall mining areas <br />will vary based on the exact Final highwall locations and assouated mining conditions. <br />3. Highwall mining operations will be conducted 24 hours a day 5-7 days/week schedule, based <br />on the current anticipated mine production projections. When working after dark, adequate <br />illumination for the work areas shall be provided. <br />4. Coal will be extracted utilizing the highwall miner, starting within the coal seam to maximize <br />• recovery and coal quality. The highwall miner will take the entire thickness of the coal seam <br />with a maximum penetration of 1,000 feet. <br />5. Coal will either be conveyed onto the pit Eloox or directly into the haulage trucks. If <br />conveyed onto the pit floor the front-end loader/dozer will stack the coal away from the <br />highwall miner for loading at a later time. <br />6. Coal haulage traffic will be routed through the pit area using the establish pit ramps traveling <br />in a one-way directional flow pattern only. <br />7. In the event of a blast occurring within 1,000 feet of the highwall miner operation, the miner <br />will cease operation and back gway From the highwall a minimum of 50 feet. Upon <br />completion of the blast and the all-clear signal given, the highwall will be reexamined for any <br />problems caused by the blast, and commence highwall mining operations if highwall has been <br />deemed safe to proceed again. <br />8. The spacing between highwall miner entries are addressed in SCC's MSHA Ground Control <br />Plan Appendix C. The pillar design is based on a safety factor of 1.5. <br />9. Should the active opening being mined intersect the previous opening, the highwall miner will <br />pull out immediately at that point, skip the next adjacent hole and then continue to highwall <br />mine again. <br />10. Highwall miner openings shall be blocked with spoil or other suitable material before they are <br />• abandoned. A maximum of 15 previously highwall mined holes will be left open for visual <br />monitoring of any pinching or squeezing of the web pillars. <br />12-23 TR-21 <br />