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RULE 2 PERMITS <br /> overall width of approximately 100 feet, with a 28-foot asphalt-running surface as shown on (Map 25E <br /> Sheet 1). <br /> Asphalt pavement specifications were based on a 30 year design life with an 18" thick base course <br /> (gravel) and 7.0" asphalt thickness. The asphalt installed will support a 50 ton coal haul trucks with axle <br /> loads of about 81 psi. Cut slopes have been completed at 0.25H: 1V or less when completed in competent <br /> rock. Elsewhere, cut slopes in unconsolidated materials were typically laid back at 2H:1V; however some <br /> areas are steeper or shallower based on field conditions encountered during construction (please see Map <br /> 25E Sheet 3). <br /> Several access roads have been constructed to support mining operations at the Collom mine. Two access <br /> roads were constructed to the Section 25 and 26 sediment ponds, an access road was constructed to access <br /> the Collom Haul Road from the Jubb Creek entrance off of Moffat County Road 32, and several <br /> temporary access roads were established to support intial mining operations. The locations and as-built <br /> configurations for these access roads are provided in Volume 1813, Exhibit 7-23, Part D, Figures DI <br /> through Figure D4. <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 /> Report Collom Temporary Spoil Pile and Pond and Exhibit 23, Item 2. Also refer to Exhibit 7, Item 25 — <br /> Collom Post Mine Channel Design; Exhibit 7, Item 23, Part C— Collom Pond Design Maps; and Exhibit <br /> 7, Item 23 (for information pertaining to diversion channels during mining) for specific designs and <br /> locations of these structures. <br /> During the initial facitlites development a stage development of the Section 36, Middle Pond, and Section <br /> 25 Pond will occur to avoid the brooding and lekking season for Greater Sage Grouse. This plan can be <br /> seen in Exhibit 7, Item 23, Part J. <br /> The sediment ponds will remain in place until such time as the entire disturbance footprint area reporting <br /> to these structures is reclaimed and the requirements of Rule 4.05.2(2) are met. The best case scenario for <br /> this would be a minimum of 2 years after the last seeding occurs within the affected contributing <br /> watershed. Therefore,the earliest anticipated removal of these structures is approxiamtely 2035. <br /> One containment pond (Wilson Storage Pond) is utilized to store water during the initial construction of <br /> the Collom Haul Road and Collom Facilities Area. Water is pumped or trucked in from an exisisting <br /> Colowyo held water right and is stored in the Wilson Storage Pond and utilized for dust suppression and <br /> other water needs during construction. It is estimated that the Wilson Storage Pond will only be needed <br /> for a short period of time (2-3 years) and then it will be reclaimed. The design for this storage pond can <br /> be found in Exibit 7, Item 23, Part L. <br /> 2.05.3 (5) Topsoil <br /> Prior to any mining related disturbances, topsoil will be removed from planned disturbance areas as <br /> discussed in Section 2.05 (Topsoil Redistribution Plan) and Section 4.06 (Topsoil) and redistributed or <br /> stockpiled as necessary to satisfy the needs of the reclamation timetable. <br /> Collom—Rule 2,Page 76 Revision Date: 6/22/20 <br /> Revision No.: MR-220 <br />