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2.~-2 <br />The existing ventilation fan will be replaced with a larger fan, <br />• designed for the expanded operations. The installation of this fan, <br />the location of which is shown on Figure 2.2-2, shall be in <br />compliance with all requirements of 30 CFR 75.300. <br />Power distribution equipment will also be located as shown on Figure <br />2.2-2. A power line was constructed from the mouth of Munger Canyon <br />to the mine site in 1983. The power line roughly follows the access <br />and haul road. The crusher and conveyor ganl,ry will be placed <br />appropriately to receive coal. Crushed coal will be piled adjacent <br />to the unit for loading into on-highway trucks. <br />2.2.2 Access and Haul Roads <br />u <br />Access to the Munger Canyon Mine is from Colorado State Highway 139 <br />(Douglas Pass Road) as shown on Figure 2.2-16. The existing road is <br />approximately 10,500 feet long, with 6,600 feet of the feature <br />consisting of improvement to an existing road along the canyon <br />floor. The remainder was built along a hillside above and adjacent <br />to an ephemeral channel. Road related disturbance can be seen on <br />Figure 2.2-1 and more specifically on Figure 4.7-2. <br />The following is a sub-grade summary of laboratory tests made <br />specifically in the same soil type at the McClave Canyon site <br />located approxim ately one mil e north of this site. It is assumed <br />that the data is appropriate to the Munger Canyon site. <br /> Density Moisture CBR CBR <br />Soil Description PCT PCT Value#* Compact% <br />Red Sandstone- 112.4 14.7 1.4 98.8 <br />Claystone w/red <br />Silty Clay DRY <br /> Density% Moisture% Swell% <br /> 111.0 8.0 5.56 <br />*Proctor Density ASTM D698-70 Method A <br />*#Compacted to natural dry density and soaked 96 hours prior <br />to penetration with 10 lb surcharge (ASTM D1883j <br />• <br />Road Design Considerations: <br />25 ton haul trucks Vehicle width = 8 feet <br />Maximum weight = 90,000 lb Maximum wheel load = 7,000 lb <br />Construction criteria: <br />road widths - straights = 2.0 x width = 16 feet <br />curves = 2.5 x width = 20 feet <br />Berm Height - radius of largest tire <br />Sub-base - 2.0 feet beyond finished width on both sides <br />Surface top materials = 6" maximum depth <br />1/2" cross slope per foot on finished surface <br />Additional tests and considerations will be made prior to and during <br />road improvement so that the design and construction will be based <br />upon site specific information. <br />~-,;, <br />,;~~~ <br />