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2.05.6(6) SUBSIDENCE MONITORING. SUBSIDENCE SURVEY. AND SUBSIDENCE CONTROL PLAN <br />These sections present the necessary subsidence information required by the CMLRD for MCM's Williams Fork <br />Mines. An inventory of all structures and renewable resource lands in the permit area has been performed, and a <br />determination of material damage or diminution of use for areas of planned mining has been incorporated herewith. A <br />subsidence control plan and a limited subsidence monitoring program are presented for the appropriate mining areas. <br />An inventory of all structures and renewable resource lands is presented on Table 78, Inventory of Structures and <br />Renewable Resource Lands. The locations of all structures and renewable resource lands are shown graphically on <br />the Structures and Renewable Resources Map (Map 25). <br />Structures <br />The following structures have been identified within and adjacent to the Permit Area: <br />• Mine Facilities (not undermined) <br />• Mine Facilities (presently undermined) <br />• Mine Facilities (to be undermined) <br />• Private Residences (houses) <br />• Oil Pipeline <br />• County Road 107 <br />• State Highway 13 <br />• Railroad <br />• Irrigation Ditches <br />Mine Facilities (Not Undermined). The mine facilities located at or adjacent to the No. 5, No. 5A, and No. 9 portals <br />have not been undermined. The structures in the these areas include mine portals, bathhouses, ventilation fans, <br />storage buildings, and utilities as well as coal transport, preparation, and storage facilities. All mine facilities have <br />been discussed in detail in Section 2.05.3, Operation Plan. <br />Mine Facilities (Presently Undermined). The mine facilities within the permit area that are presently undermined <br />include mine access roads, powerlines, water lines, railroad spur, coal storage silo, and coal conveying system. These <br />facilities are located over development entries (mains and sub - mains) which are designed to remain stable for the life <br />of the mine. These facilities have been protected against subsidence damage by assuring that sufficient coal was left <br />in -place to prevent or minimize subsidence in the area. In addition, areas of Trapper Mining, Inc.'s surface mining <br />operation which have been previously mined and reclaimed have been partially undermined. The Trapper Mining <br />reclaimed areas that have been undermined including reclaimed mine areas, two topsoil stockpiles, an access road <br />leading to the topsoil stockpiles, and several small stock ponds were undermined without any material damage. <br />Mine Facilities (To Be Undermined). The mine facilities under which proposed mining will be conducted include <br />MCM's underground F -Seam and P -Seam workings. Proposed mining will undermine underground mine workings in <br />both the No. 5 and No. 9 Mines, however, none of the No. 9 Mine workings have been undermined to date, so <br />potential impacts would be limited to any future mining. The MCM surface facilities that will be undermined include <br />Sedimentation Ponds SH -Pl, SH -P2 and the associated Old Shop and storage area (reclaimed in 2008), a rock dust <br />tank, the contractor staging area, the Storage and wood shop, and the Okie Plaza Well. <br />Private Residences (Houses). There are three -(3) private residences located within the Permit Area. They are located <br />as follows: (1) NEA of the SEA of Section 30, T6N, R91 W, (2) SEA of the NEA of Section 29, T6N, R91W, and <br />(3) W '/2 of the W '/z of Section 29, T6N, R91 W. These structures are located outside of the angle of draw calculated <br />for both historical and potential future mining. Therefore, the structures are protected from any subsidence - induced <br />damage. <br />TR14 -36 2.05 -48 Revised 03/20/14 <br />