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XVIII. Coal Processing Waste and Non-Coal Processing Waste (2.05.3(8), <br />2.05.4(2)(f), 4.10, 4.11) <br />The seam proposed for extraction in this permit application is overlain by a <br />series of thinly-laminated alternating shales and sandstones, approximately 20 <br />feet in total thickness. The competent Cliff House sandstone occurs above <br />this thinly-laminated section. Upon undermining, roof falls involving this <br />irmnediate problematic roof section are encountered within the workings. Even <br />though an approved roof control bolting program is conducted by National King <br />Coal Company, some roof fall waste is generated systematically. During past <br />operations, 10 to 26 tons of this waste material has been temporarily stockpiled <br />on the surface (6 month maximum) and periodically backstowed within abandoned <br />workings of the mine. All drainage from this area is contained in the sediment <br />ponds. Such backstowing serves to provide partial support of subsiding roof <br />section, lessening the magnitude of encountered ground surface subsidence. As <br />such, the practice is encouraged. <br />This operation is in compliance. <br />XIX. Mine Facilities, Coal Handling Structures, Support Facilities (2.05.3(3), <br />2.05.3(7), 4.04) <br />The mine facilities, coal handling structures and support facilities section of <br />the permit application have been reviewed and found to be in compliance. <br />This information can be found in Sections 2.05.3, 2.05.4 and 2.06.10 of the <br />permit application. <br />XX. Roads (2.05.3(3), 4.0 <br />One road structure exists at the King Coal mine. This structure, constructed <br />over 40 years ago, connects the mine bench with County Road 120 and is used as <br />an access road and a haul road. The structure shown on Map C-4 in the permit <br />application, spans approximately 600 linear feet across Hay Gulch and is <br />approximately 50 feet wide. Since the road crosses the valley bottom, the <br />grade is gentle, with a maximum slope of 30. The structure is compacted fill <br />material to a depth of 4 to 5 feet, surfaced with washed river rock of 2.5 <br />inch average gradation. Two surface drainage culverts, 24 inch and 36 inch <br />diameter, have been installed to pass runoff from the valley floor beneath <br />the roadway. <br />Monthly inspection by the Mined Land Reclamation Division since 1979 has <br />shown that the road has been adequately designed to control erosion and siltation. <br />The surface drainage culverts are also adequate to safely pass runoff beneath <br />the road surface. Since the grade is gentle, no problems exist with stability <br />and National King Coal maintains the structure regularly. On the basis of <br />these observations, the structure is considered to be in compliance. <br />At the request of the landowner (see letter from Lawrence Huntington, January <br />12, 1982, in permit application), the applicant proposes to leave the road intact <br />after mine abandonment as part of the approved post-mining land use. In <br />accordance with Rule 4.03.1(1)(f), the Division hereby finds that retention of <br />the road is consistent with the approved post-mining land use for the permit area <br />and would serve as a beneficial access for agricultural purposes to lands adjacent_ <br />to the proposed permit area. Additionally, the road, as constructed, complies <br />with all applicable performance standards. Therefore, the request to retain the <br />road is approved. <br />