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to within three feet of the surface. A piece of rebar was placed in the top three feet to act as a permanent marker <br />and the remainder of the hole was backfilled with soil. <br />A ventilation borehole shaft was constructed in the bleeder, located at the western end of 3 southwest longwall <br />panel, to augment the existing ventilation system and replace the Fish Creek Ventilation Borehole. The <br />construction of the shaft utilized surface drilling techniques, with cuttings being disposed of on the surface. The <br />fan was used for a period of approximately 3 years, or until the southwest mining district reserves were exhausted. <br />The site is shown on Figure 16A, Southwest District Ventilation Borehole and Access Road Location. <br />Tile drilling of the borehole resulted in minimal surface disturbance. A drill pad approximately 100' x 100' was <br />constructed at the site. Available topsoil was salvaged and stockpiled for future reclamation of the site. The pad is <br />located in a Buckskin loam soil, and approximately 16 inches of topsoil was available for salvage. This resulted in <br />approximately 480 CY of topsoil being salvaged and stockpiled on the south side of the site. Casing and other <br />drilling supplies were stockpiled adjacent to the borehole pad. Topsoil salvage is not planned for this temporary <br />storage area. A fence was constructed around the site. This site has been completely reclaimed and the Ventilation <br />Borehole backfilled. <br />An access road, as shown on Figure 16A, was constructed into the site. The road was an upgrade of an existing <br />fence maintenance road except for approximately 50' into the site, is approximately 1700 in length and the top <br />width of the road was approximately 15 feet. The initial topsoil salvage width was 25 feet to allow for inscription <br />of borrow ditches along side the road. The road crosses two types of Buckskin Loam, 2 C and E (difference based <br />upon slope). Approximately 16 inches of soil was salvaged from the access road corridor. The access road was <br />constructed on a previously constructed fence access road. The owner did limited topsoil salvage along sections of <br />the fence road when it was constructed, and this material is windrowed adjacent to the road. The remaining topsoil <br />• salvaged from the access road corridor was windrowed on the downslope side of the road, signed and seeded. <br />Approximately 2050 CY of topsoil was windrowed along the length of the road. The road was surfaced with <br />approximately 6 inches of 6" minus pit run. As shown on Figure 16A, a 24" culvert was placed in the drainage, <br />this will replace the existing 18" culvert. The design for the culvert can be found in Exhibit 8. When the borehole <br />is no longer needed the access road will be reclaimed by replacing the windrowed topsoil over the gravel, or the <br />gravel may be reclaimed by TCC and applied to other roads. The replaced topsoil will be seeded with the <br />approved seed mixture. In the event the landowner wants the road retained after the borehole site is no longer <br />needed the road will be left as is. The access road has been completely reclaimed. <br />After topsoil was removed from the pad area, mud pits were dug adjacent to the drill hole. The subsoil excavated <br />from the pits was placed adjacent to the pits within the boundary of the site. Drilling Fluids and cuttings were <br />discharged into the pits. Drilling muds were used during the course of drilling the pilot hole and shaft. The drill <br />cuttings remain in the mud pit. The subsoil material was spread over the drill pad prior to replacement of the <br />topsoil. An existing mud pit was used to collect trash, such as paper, cans, cardboard, etc. Oily rags were not <br />placed in the pit. <br />The surface collar is approximately 4.0 feet in diameter and was augured approximately 50 feet to bedrock. The <br />pilot hole was 12.5 inches in diameter and the drilled shaft is 42 inches in diameter. <br />The collar was comprised of two components, a surface concrete pad and a liner or casing that extends to bedrock. <br />A concrete centering base will be at the bottom of the liner. The ventilation casing was grouted inside of the liner. <br />Tile concrete pad was poured around the liner, and is approximately 10'x10'x2'. However, the liner extends <br />. through the pad, reducing the amount of concrete needed to construct the pad. Approximately 5.5 CY of concrete <br />was required to construct the pad. <br />PR 97 -04 2.05 -42 mm,ioti <br />