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The IAP fan is approximately 11.5' x 9.5' x 9' and was placed 20' west of the borehole on a 20' x 30' x <br />2' concrete pad. The Robinson fan was acquired from the Fish Creek Borehole facility and is <br />approximately 8' x 9' x 11'. The Robinson fan was placed 20' south of the borehole on a 20' x 20' x 2' <br />pad and includes a 20' x 20' x 12' lean-to building. A spare pad with dimensions of 24' x 12' x .8' was <br />constructed approximately 20' east of the borehole to facilitate an additional fan installation that is no <br />longer required. <br />The intake fan is a Jeffrey 60" diameter axial vane fan with capacity to move 150,000 cubic feet per <br />minute into the mine. The prime mover is an 800 hp motor. This fan was installed approximately 20' <br />east of the intake borehole. The dimensions of this fan are approximately 5.3' x 7.3' x 6.5'. Support for <br />this fan is provided by a 20' x 20' x 1' concrete pad. <br />The installation of a heater was required to warm the air being blown into the mine under freezing <br />conditions. The heater was constructed on the east side of the intake fan vent shaft. A concrete pad <br />approximately 12' x 26' x 1' was constructed to support the heater. Overall dimensions of the heater are <br />10' x 20' x 10'. The structure was painted to match the existing structures on the site. <br />An electrical control building was constructed between the intake and exhaust fan locations. A 16' x 16' <br />x 2' concrete pad was constructed for the building will be 16' x 16' x 12'. Two 8' x 8' x 2' concrete pads <br />were constructed beside the building for placement of transformers. Six electrical poles were installed <br />from the electrical control building to the fan installations. <br />In order to improve operation of the ventilation system, an additional electrical control panel was installed <br />at the site. The panel is approximately 5' x 3' x 8' and sits on a concrete pad that is approximately 8' x 8' <br />• x 4 ". A power cable extends from the control panel to the IAP fan and four new poles were added to <br />allow for installation of the cable. The location of the controller, pad, and poles is shown on Figure <br />16E(1). <br />The access roads into the site have approximately 9" of 6" minus pit run and 4" of 1" minus base coarse. <br />The material was graded and crowned to facilitate drainage off of the roads. The upper road is <br />approximately 900 feet in length and the lower road is approximately 450 feet in length. The top width of <br />the roads is approximately 15 feet. Upland drainage is diverted around the site. The fan buildings were <br />painted to blend in with the surrounding area. The fence constructed around the perimeter of the site is <br />used to keep animals out of the area. The power line comes in from the northeast from an existing YVEA <br />site. The sediment control system utilizes a diversion ditch, seeding and mulching topsoil pile, cut and fill <br />slopes, grading road and pad, and the adjacent vegetation filter. <br />IAP Fan Silencer (MR 02 -178) <br />A new silencer will be installed on the IAP fan, and installation of the silencer and associated duct work <br />will require construction of foundations and H -Beam supports. The four foundations will require footers <br />(3.5' x 3.5' x 1') and then placement of piers (4' x 1.3') on top of the footers. The footers will be <br />approximately 3' below grade. The supports will be constructed of H -beams (W8 x 18) with 3 /I' cross <br />braces. The support structures are approximately 17' in length. Another H -beam, same specification as <br />support, will be placed on top of the supports and the silencer bolted to it. The ductwork will tie into the <br />silencer and existing fan. <br />Is <br />MR 02 -179 2.05 -44 08/06/02 <br />