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During coits[n~ctioit of the pad area, topsoil was salvaged and stockpiled adjacent to the site. Approximately 24 <br />inches of topsoil was available for salvage from the 2.8 acre site, which resulted in approximately 8,700 CY of <br />topsoil placed in the adjacent stockpile. The topsoil salvaged from [he road was windrowed to the side of the road <br />and stockpiled. Botlt the stockpile and windrowed topsoil were stabilized with [lie topsoil stockpile stabilization <br />seed mixture. It should be noted that a portion of the site has been reclaimed. The remaining topsoil volume is <br />presented on Table 49A. <br />The ventilation system required boring two shafts from the surface down into the coal seam. The exhaust return <br />air shaft Itas a finished inside diameter of four fee[ and the intake shaft has a finished inside diaine[er of 5 feet. <br />Botlt holes are cased with steel. A reverse circulation rig was employed for the drilling of the two Boles. A T- <br />sltaped, 2-foot thick reinforced concrete pad was constructed at each site. The top of the "T" has approximate <br />dimensions of 30' x 30' and contains the shaft and an l8" diameter, 30' hole for the drill stem. The bottom of the <br />"T" Itas dimensions of approximately 10' x 30'. Ahead frame was constructed over the hole and the holes were <br />reamed out to the final diameter of 7' and S.S, respectively. Water was recycled during drilling. Two mud pits <br />were excavated to accommodate the cuttings generated during [he drilling of the holes. One of the pits was 150' x <br />100' x 9' and the other one was 100' x 100' x 7'. Cuttings from the mud pits were partially solidified and hauled <br />to TCC's solid waste disposal area. The pits are no longer required and the original excavated material was placed <br />back into the pits. <br />The holes leave been cased and fans were placed at both of the borehole locations. A total of three fans have been <br />installed at the two locations. The return air borehole has two fans and the intake borehole has one fan. The <br />centrifugal return fans consist of a Robinson 400 lip with exhausting capacity of 90,000 cubic feet per minute and <br />a back-up Industrial Air Products (IAP) 1250 hp with exhausting capacity of 150,000 cubic feet per minute. <br />• The IAP fan is approximately 11.5' x 9.5' x 9' attd was placed 20' west of the borehole on a 20' x 30' x 2' <br />concrete pad. The Robinson fan was acquired from the Fish Creek Borehole facility and is approximately 8' x 9' <br />x 1 I'. The Robinson fait was placed 20' south of the borehole on a 20' x 20' x 2' pad and includes a 20' x 20' x <br />12' lean-to building. A spare pad with dimensions of 24' x 12' x .8' was constructed approximately 20' east of <br />the borehole to facilitate air additional fan installation that is no longer required. <br />The intake fan is a Jeffrey 60" diameter vane axial fan with capacity to move 150,000 cubic feet per minute into <br />the mine. The prune mover is a 800 hp motor. This fan was installed approximately 20' east of [rte intake <br />borehole. The dimensions of this fan are approximately 5.3' x 7.3' x 6.5'. Support for [Iris fan is provided by a <br />20' x 20' x I' concrete pad. <br />The installation of a heater was required to warm the air being blown into the mine under freezing conditions. The <br />heater was constructed on the east side of the intake fan vent shaft. A concrete pad approximately 12' x 26' x I' <br />was constructed to support the heater. Overall dimensions of the heater are 10' x 20' x 10'. The structure was <br />painted to match the existing structures on the site. <br />Air electrical control building was constructed between the intake and exhaust fan locations. A I6' x 16' x 2' <br />concrete pad was constructed for the building will be 16' x 16' x 12'. Two 8' x 8' x 2' concrete pads were <br />constructed beside the building for placement of transformers. Six electrical poles were installed from the <br />electrical control building to the fan installations. <br />In order to improve operation of [Ire ventilation system, an additional electrical control panel was installed at the <br />site. The paste! is approxirttatelg~ 5' x 3' x 8' and sees on a concrete pad that is approximaiely 8' x 8' x 4". A power <br />• cable extends from the control panel to the IAP fan and four new poles were added to allow for installation of the <br />cable. The location of the controller, pad, and poles is shown on Figure 16E(I ). <br />PR 97-04 2.05-44 mimioc <br />