2012-08-31_PERMIT FILE - C1981012A (5)

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Passage of men and materials in the rope slope will be assisted by a hoist. Rail (85 lb /yd) will be installed in the rope slope (west slope) with surface turnouts as shown on Map 11 Sheet 1 East Portal Roads, Slope Track and Cut Areas. A typical slope rail section is included on Map 11 Sheet 1 East Portal Roads, Slope Track and Cut Areas. The 85 lb ASCE rail spacing is planned at 42 inches. The rail will be set on iron -clad steel ties (3" x 8" x 72 ") bedded in ballast /crushed rock. The hoist sheave and the hoist are located as shown on Map 11 Sheet 3 East Portal Facilities. The main components of the single drum mine hoist are a 300 HP DC motor, 60:1 gear reducer, hoist drum assembly, and brakes. The hoist will be placed on new foundation housed within a 20 ft by 40 ft metal building. The tower is designed to support a 7 ft sheave wheel to deflect the 1 %" wire rope down the 17 degree slope. The details of the foundations are included in Exhibit 28 -Bond Calculations. A discussion of the new access and new light use road that are associated with the Bates Portal follows. Typical cross sections are shown on Map 11 -Sheet 1 East Portal Roads, Slope Track, and Cut Areas. The roads are shown on Map 12 West Portal Area Roads, Utilities, and Facilities. A discussion of the haul road to the RDA associated with TR -66 follows. Typical sections are shown on Map -11 Sheet 1 East Portal Roads, Slope Track and Cut Areas. Sedimentation control is shown on Map - 13 Site Plan East Portal Facilities. Haul Road and Access Road Location Haul roads and Access roads will to the extent practicable, be located on ridges or on the most stable available slopes to minimize erosion. Haul Road and Access Road Design and Construction The Bates Portal access road runs from the Bates Portal on the east to an existing access road to the west, a distance of about 410 feet at a constant grade of 10 percent. Cut slopes are not steeper than 1.5h:1 v in unconsolidated materials or 0.25h:ly in rock. Embankment slopes are not steeper than 1.5h:1v. The north side of the access road is supported by retaining walls. The RDA haul road runs from Highway 12 to the RDA, a distance of 1830 feet. The road will have a 0 percent grade for the first 40 feet per CDOT Access Code requirements, then remain at a constant grade of 10 percent until tying into original ground. The haul road width will vary from 24 -30'. Cut slopes are not steeper than 1.5h:1v in unconsolidated materials or 0.25h:ly in rock. Embankment slopes are not steeper than 2h:ly or 1.35h:ly where embankment is 85% rock. All vegetation material and topsoil will be removed from the design road bed, shoulders, and surfaces where associated structures will be placed. Topsoil will be placed in one of the topsoil stockpiles located on site. No vegetation material or topsoil will be placed beneath or in any road embankment. The material for the embankment shall be reasonably free of organic material, coal or coal blossom, frozen materials, wet or peat material, natural soils containing organic matter or any other material considered unsuitable for use in embankment construction by the DRMS. In the placement of embankment for the access road, materials will be spread in layers approximately 12 inches deep before compaction, and such lifts made uniformly over long stretches and for the full width of the embankment. Each layer of the embankment shall be completed, leveled, and compacted before the succeeding layer is placed. Embankment material shall be leveled as placed and kept smooth. Compaction shall be performed to the extent necessary to ensure stability. TR -66 2.05 -7a 07/25/12