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mining is designed for zero subsidence to prevent disturbance or damage to powerlines, <br />buildings, or other surface facilities, <br />4.23.2 Backfill and Grading Requirements <br />Highwall mining will be conducted in accordance with the backfilling and grading requirements <br />of 4.14. <br />4.23.2 Highwall Shall be Eliminated <br />Highwall mining is proposed to occur in areas previously mined with adequate material on hand <br />to backfill the pits with proper static safety factors for stability to the approved postmining <br />topography thereby eliminating all highwalls. Any minimal spoil material generated by the <br />hghwall mining operation will be buried at depth in the pit backfill. All coal seams mined will <br />be adequately covered by pit backfilling in conformance with the permitted PMT and reclamation <br />plan. No remnant highwalls will be left at conclusion of the reclamation activities attd no spoil <br />material will be place nn any outslopes. <br />Revision Date: 11/21/03 <br />Revision No.: TR -58 <br />Rule 4.23 4.23-3 <br />