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Mid-Panel Barricade Chamber (" Borcholes <br />• As a consequence of TCC's plans to develop 22,000 foot long mining panels, MSHA requires that mid-panel <br />barricade chambers be established to ensure the safety of miners working in the panels. The barricade chambers are <br />constructed with steel-cased 6" boreholes completed to the surface for the purpose of providing air, water, food, first <br />aid supplies, etc., in the event of an emergency. Surface disturbance typical of exploratory drill hole pad development <br />is associated with each barricade chamber 6" borehole site. <br />The 6" boreholes developed to serve the 9-Right and 10-Right gateroad barricade chambers are located in Sections 22 <br />and 21 respectively as depicted on Figure ItiB. 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'. Topsoil from <br />the drill pad and mud pit areas is salvaged and stockpiled adjacent to each drill site. Approximately 2G' of the Binco <br />silty clay loam is available far salvage based upon [he existing soils mapping for each site. Following topsoil salvage, <br />each drill site is leveled and mud pits are developed. Site drainage is' configured to contain surface runoff from the <br />site within the nerd pit areas. Secondary sediment control measures consisting of silt fences or hay bales are utilized <br />as necessary [u minimize sediment transport front each site. <br />Each drilling site is accessible from an existing light use road located in the general vicinity. No access <br />improvements are required providing the sites are accessed and developed during dry weather or frozen ground <br />periods. Na 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 will windrow topsoil from the access routes as appropriate to <br />ensure protection of [he topsoil resource. Each drill hole will be cased with 6"diameter steel casing. The casing will <br />protrude approximately 4' above ground elevation. Protective shelters of wood frame and sheet metal construction <br />will be built over each casing. The shelters will be constructed on concrete foundations <br />• Following [he completion of drilling activities, the mud pits a[ each site, once suitably dry, are backfilled. The sites <br />are regraded, topsoil is redistributed, and [he areas are seeded with the appropriate seed mix at the first appropriate <br />seeding opportunity. The 6" borehole casings remain protruding from each site until they are 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 [he casings will be fully grouted to [he <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 die ground surface at each site. The hole locations will be marked. <br />Self-Cleanine Maenet <br />A self-cleaning magnet is proposed to be installed above the prep-plant feed belt immediately outside the prep- <br />plant reclaim tunnel. This magnet is required [o prevent steel from being transported into the mechanical systems <br />in the plan[ with the coal. The foundation will be four 18-inch concrete caissons extending 14 feet below existing <br />grade. The support structure will be constructed of steel W8x31 beams and will be 25 feet in height. <br />Approximately 140 fee[ of steel beams will be used in the support structure. Electrical service for this magnet will <br />be provided via a conduit mounted on [he feed belt truss and tied into the prep-plant mcc room. <br />Temnorary Bclt from Rock Belt Discharr=_e Pile to Low Quality Coal Pile/Pren-Plant <br />A temporary belt system is proposed from the existing rock belt discharge pile to the east end of the low quality <br />coal pile or the prep-plan[. An underground feeder will be buried a[ the rock belt discharge pile. Power will be <br />supplied to the feeder via conduit or protected cable on the truss and down the support bent. The conduit or <br />protected cable will then be buried from the base of the support bent over to the feeder. The feeder will discharge <br />.un a 48-inch belt that extends 800 feet over to the east end of the Imv qualiq~ coal pile. This structure will be a <br />channel f}mne type conveyor and will he mounted on the ground via floor stands set on cross ties without concrete <br />foundations. The drive/head pulley for this conveyor will he placed on a concrete pad 8 feet by 10 fee[ by I foot. <br />MR 97-I~d 2.05-59 Revised 9/9/97 <br />