PERMFILE103109 - Laserfiche WebLink

Home Browse Search

APR. 9.2002 10:06RM TWENTYMILE CORL ENVIRONMENTAL N0.871 P.6 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 2' concrete pad. The Robinson fan was acquired firm the Fish Creek Borehole facility and is approximately 8' x 9' x 11'. The Robinson fan was placed 20' south of the borehole on a 20' x 20' x 2' pad and includes a 20' x 20' x 12' lean- to building. A spare pad with dimensions of 24' x 12' x .8' was constructed approximately 20' east ofthe borehole to facilitate an additional fan installation that is no longer required, The intake fan is a Jaffrey 60" diameter axial vane fan with capacity to move 150,000 cubic feet per minute into the mice. The prime mover is a 800 hp motor. This fan was installed approximately 20' east of the intake borehole. The dimensions of this fan are appra~cimately 5.3' x 7.3' x 6.5'. Support for this fan is provided by a 20' x 20' x 1' concrete pad. The installation of a heater was required to warm t]te av being blown into the mine under freezing conditions. The heater was constructed on the east side of the intake fen vent shaft. A concrete pad approximately 12' x 26' x 1' was constructed to support the heater. Overall dimensions of the heater are 10' x 20' x ] 0'. The structure was painted to match ffie existing structures on the site, An electrical control building was constructed between the intake and exhaust fhn locations, A 16' x 16' x 2' concrete pad was constructed for the building will be 16' x 16' x 12'. Two 8° x 8' x 2' concrete pads were constructed beside the building for placement of hansformers. Six electrical poles Were installed from the electrical control building to the fan installations. In order to improve operation of the ventilation system, an additional electrical control panel was' installed at the site. The panel is approximately 5' x 3' x 8' and sits on a concrete pad that is approximately 8' x 8' x 4". A power cable extends from the control panel to the IAP fan and four new poles were added to allow for installation of the cable. The location ofthe controller, pad, and poles is shown on Figtue 16E(1). The access roads into the site have approximately 9" of 6" minus pit run and 4" of 1" minus base coarse. The material was graded and crowned to facilitate drainage off of the roads. The upper road is approximately 900 feet in length and the lower road is approximately 450 foet in length. The top width of the roads is approximately 15 feet, Upland drainage is diverted around the site, The fan buildings were painted to blend in with the surrounding area. The fence constructed around the perimeter of the site is used to keep animals out of the area. The power line comas in from the northeast from an existing YVEA site. The sediment control system utilizes a diversion ditch, seeding and mulching topsoil pile, cut end fill slopes, grading road and pad, and the adjacent vegetation filter. IAP Fan Silencer (MR 02-198) . A new silencer will be installed ott the IAP fan, and installation of the silencer and associated duct work will require construction of foundations and H-Beam supports, The four foundations will require footers (3.5' x 3.5' x 1') sad then placement of piers (4' x 1.3') on top of the footers. The footers will be approximately 3' below grade. The supports will be constructed of H-beams (w8 x 18) with l/." cross braces. The support structures are approximately 17' in length. Another H-beam, same specification as support, will be placed on top of the supports and the silencer bolted to it. The ductwork will tie into the silencer and existing fan. The installation of the silencer and duck work will oceur within the existing disturbed area. The overall length of the silencer and duct work is approximately 34 feet, the location of the structure is shown on Figure 16 E(1). hilt o2.17s 2.05-44 oaiosioz