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collection pit area. The cuttings material will be utilized to re-fill the shaft during the eventual reclamation of the facility. Once the cutter head reaches the coal seam, the cutter head will be disassembled and removed from the A-leg derrick. Using the same A-leg derrick, the excavated shaft wilt then be lined to a nominal 6' inside diameter using a hydrostatic steel liner. The steel liners will be pre-fabricated off site, hauled to the site and field welded in 40' joints. The liner will be floated into place. This is accomplished by securing a steel bulkhead to the bottom joint and leaving the excavated hole full of water while the liner is being lowered into place. By calculating the exact buoyancy of the liner, and adding water to the inside diameter as needed, the liner is easily and safely lowered into position. Once the liner is in place, a nominal g" thick grout seal will be pumped between the strata and liner to hold it in place. The grouted steel liner will serve to isolate the Twentymile Sandstone from the Wadge Overburden. As noted above, it is planned to pressure grout the Twentymile Sandstone. This will further ensure that after final closure, the water in this unit will be confined and not seep down on the inside of the shaft. Following completion of shaft boring and casing operations and removal of equipment from the site, the emergency hoist equipment will be erected on either the previously constructed or new concrete. Average pad thickness will be 1-2' and total pad surface area will be approximately 800 FT2. A fence will be constructed to enclose the surface collar and emergency hoist installation. Following commissioning, the shaft pad site and access road will be cleaned-up and surface areas graded and dressed In order to minimize potential environmental and aesthetic impacts associated with the 18 Right ventilation shaft and emergency hoist installation, surface drainage at the shaft - site will be handled by two (2) up-gradient diversion ditches, two (2) down-gradient drainage ditches, the use of 20-inch diameter sediment logs around the lower portion of the topsoil stockpile, the use of Curlex single net (Curlex I) erosion control blankets over seeded cut and fill slopes, the combination of a rock filter (2-ft rock berm) and grass filter, and gravel surfacing under an SAE (Refer to Exhibit 8T for SAE detail); the limited road drainage will be handled by designed drainage structures; active use areas are graveled to control dust and drainage; other disturbed areas (including topsoil stockpiles) will be stabilized with temporary vegetation; and any structures will be painted in neutral earth-tone colors to blend with the natural surroundings. As shown on Map 23, additional entries will be driven at the back of the 18 Right gate road to the east for the ventilation shaft site. These entries will be needed to maximize the efficiency of the ventilation system. The entries will be driven in the same manner as is used in TCC's development work, i.e. continuous miners and shuttle cars. 2. Location and type of on-site facilities/structure: The 18 Right Bleeder shaft is located in the SE/4NE/4 of Section 10 (also straddling onto the SW/4NW/4 of Section 11), T5N, R86W immediately to the east of Fish Creek. Locally this area is known as the east side of Twentymile Park. The access road entrance into the site is located/starts in the SW/4 of Section 1, T5N, R86W and continues through portions of Section 2 (SE/4), and 11 (N/2) to the shaft site. The site will be graded so that it drains to a rock check filter and then through the existing vegetation. A collection ditch will be inscribed around the topsoil stockpiles to collect runoff and channel it to the rock check filter. Refer to item nos. 1 and 4 for additional information.