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RULE 2 PERMITS <br /> A haul road will be constructed to facilitate mine traffic from the Collom primary crusher to the Gossard <br /> load out facility located northeast of the Collom Pit. This approximate 6 mile long haul road will be <br /> constructed to meet the specifications and standards set forth in Rule 4.03.1 (See Map 25E, Sheets 1-4). <br /> The haul road will be constructed with a crown, and constructed upon the most stable available slope to <br /> minimize erosion. An elevated haul road crossing will be installed at Moffat County Road 51 at the <br /> request of Moffat County (See Map 25F). This elevated crossing will ensure the general public traffic is <br /> separate from the mail haul road traffic, and will take Moffat County Road 51 over the top of the Collom <br /> haul road. An equipment crossing adjacent to the elevated crossing will allow large equipment movement <br /> from the Collom mine to the existing operations(See Map 25F). <br /> Overall grade of the Collom haul road will not exceed l OH:IV with a horizontal alignment consistent <br /> with the existing topography. Ditches, erosion controls, and culverts will be used to minimize impacts to <br /> surrounding areas, and will be designed in such a manner to safely pass peak runoff from a 10 year, 24 <br /> hour precipitation event(Please see Exhibit 24, Item 1 —Culverts). <br /> Additional design information for the Collom Haul Road is listed in the Construction Notes section of <br /> Sheet 3 of 4, on Map 25E. This road is specifically designed to meet the applicable haul road regulations <br /> as well as internal road design guidelines while minimizing additional disturbed area and preventing <br /> environmental damage. Design information can be found on Map 25E. The Collom haul road will have <br /> an overall width of approximately 100 feet, with a 28 foot paved running surface as shown on the typical <br /> cross-sections(Map 25E Sheet 2). <br /> Asphalt pavement specifications shall be based on a 30 year design life with a 18" thick base course <br /> (gravel) and 7.0" asphalt thickness. The pavement design is based on 50 ton coal haul trucks with axle <br /> loads of about 81 psi. This specification assumes an R-20 silty sand subgrade material. Base course shall <br /> be CDOT Class 6 aggregate. A 6 foot high berm shall be used at all locations where the roadway is <br /> elevated. Cut slopes shall be 0.25H: IV or less when completed in competent rock. Elsewhere, cut <br /> slopes in unconsolidated materials shall be laid back at 2H:1 V or less as directed by the field engineer. <br /> Requirements for fill placement shall be as specifically described in Rule 4.03.1 Haul Roads(3)(e) `Road <br /> embankments". A ditch shall be installed at toe of all cut slopes. If needed, temporary erosion control <br /> measures shall be implemented during construction to minimize sedimentation and erosion until <br /> permanent control measures can be established. <br /> There are two main haul roads that will be built to haul overburden materials from the pit to the <br /> temporary overburden stockpile. These are shown on Map 25D and are designated as the East and West <br /> Haul Roads. Please see section 4.03.1 for details pertaining to these two haul roads and haul roads that <br /> will be constructed within the mining area. <br /> Four access roads will be constructed to support mining operations at the Collom mine. Two will access <br /> the Section 25 and 26 sediment ponds, one will be utilized to access the facitlities area during <br /> construction of the Collom haul road, and one will be utilized to access the Collom haul road from the <br /> Jubb Creek entrance off of Moffat County Road 32. The locations and typically design information for <br /> these access roads are shown in Volume 18B, Exhibit 7-23,Part D, Figures D1 through Figure D5. <br /> 2.05.3 (4)Operation Plan—Ponds,Impoundments,and Diversions <br /> To control runoff, and protect surface and ground water quality, Colowyo will construct several new <br /> sedimentation structures and diversion ditches. All ponds, impoundments, and diversions are designed to <br /> meet or exceed the requirements of 2.05.3(4) and 4.05.6. All sediment ponds will be constructed and <br /> maintained in accordance with the parameters mentioned in Volume 1, Section 2.05. Impoundments will <br /> be inspected quarterly as discussed in Section 4.05.6. Please see Exhibit 23, Item 1 — Geotechnical <br /> Collom—Rule 2, Page 77 Revision Date: 1/19/18 <br /> Revision No.: TR-118 <br />