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Mid-Panel Barricade Chamber 6-inch Boreholes <br />• As a consequence of TCC's plans to develop 22,000 foot long mining panels, MSHA requires that mid-panel barricade <br />chambers be established to assure the safety of miners working in the panels. The barricade chambers are constructed <br />with steel-cased 6-inch boreholes completed to the surface for the purpose of providing air, water, food, first aid <br />supplies, etc., in the event of an emergency. Surface disturbance typical of exploratory drill-pad development is <br />associated with each barricade chamber 6-inch borehole site. <br />The 6-inch boreholes developed to serve the 9-Right and 10-Right gateroad barricade chambers are located in Sections <br />22 and 21 respectively as depicted on Figure 16B. Both sites are located on previously cultivated croplands. Surface <br />disturbance for each site is minimal and consists of an area encompassing approximately 100 x 100 feet. Topsoil from <br />the drill-pad and mud-pit areas was salvaged and stockpiled adjacent to each drill-site. Approximately 26 inches of <br />the Binco silty clay loam was salvaged based upon the existing soils mapping for each site. Following topsoil salvage, <br />each drill-site was leveled and mud pits developed. Site drainage was configured to contain surface runoff from the <br />site within the mud-pit areas. Secondary sediment control measures consisting of silt fences or hay bales were utilized <br />as necessary to minimize sediment transport from each site. <br />Each drilling site was accessible from an existing light-use road located in the general vicinity. No access <br />improvements were required providing the sites were accessed and developed during dry weather or frozen ground <br />periods. No regular periodic access requirements pertain to these sites. In the event wet weather prevails during the <br />development or subsequent access of the holes, TCC retained the flexibilityto windrow topsoil from the access routes <br />as appropriate to assure protection of the topsoil resource. Each drillhole was cased with 6-inch diameter steel casing. <br />The casing protrudes approximately 4 feet above ground elevation. Protective shelters of wood frame and/or metal <br />construction were built over each casing. The shelters were constructed on concrete foundations <br />Following completion of drilling activities, the mud pits at each site, once suitably dry, were backfilled. The sites <br />• were regraded, topsoil redistributed, and the areas seeded with the appropriate seed mix at the fast appropriate seeding <br />opportunity. The 6-inch borehole casings remain protruding from each site until they aze no longer required by <br />MSHA. Once the boreholes are no longer required, the protective shelters will be demolished, the foundations <br />removed, and a suitable plug will be placed at the bottom of each casing and the casings will be fully gouted to the <br />surface to fulfill the requirements of Rule 4.07. The protruding casings will be excavated and severed a minimum of <br />three feet below the ground surface at each site. The hole locations will be marked. <br />(Note: Text for Coal Handling System components moved to pages 2.05-24 through 38) <br />• <br />TR06-53 2.05-59 06/20/06 <br />