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• 3. Angering operations will be conducted during daylight hours on a 5-6 day/week schedule <br />based on the current anticipated mine production projections. If conditions, machine <br />availability, or coal demand requires that [he auger work after dark, adequate <br />illumination for [he work areas shall be provided. <br />4. Coal will be extracted utilizing the auger, starting within the coal seam to maximize <br />recovery and coal quality, with a 6-foot diameter cutting head and a potential <br />penetration depth of up to 800 feet. Only a single pass will be made. <br />5. Coal will either be conveyed onto the pit floor or directly into the haulage trucks. If <br />conveyed onto the pit floor the front-end loader will stack the coal away Erom the auger <br />for loading at a later time. <br />6. Coal haulage traffic will be routed through the pit area using the established pit ramps <br />traveling in a one-way directional flow pattern only. <br />7. In the event of a blast occurring within 1000 feet of the auger operations, the auger <br />• will cease operation and back away from the highwall a minimum of 50 feet. Upon <br />completion of the blast and the all-clear signal given, the highwall shall be reexamined <br />for any problems caused by the blast, and commence angering if the highwall has been <br />deemed safe to proceed again. <br />e. The minimum spacing between adjacent holes will be 5.0 feet. This web pillar width was <br />calculated based on a hole diameter of 6 feet and a corresponding design factor of <br />safety of 1.5o for pillar stability. The auger panel design information ie based on the <br />engineering report entitled `Auger Panel Design Study for Seneca II-w and Yoast Mines, <br />Seneca Coal Company' prepared by Mr. Graeme Boyd, Highwall Mining Services, Inc. of <br />Brisbane, Australia. Refer to Exhibit 12-1, Sheee 2 of 2, for the pit locations. <br />• <br />12-1-4 Revised O1/O1 <br /> <br />