2025-06-30_PERMIT FILE - C1981019 (11)

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RULE 4 PERFORMANCE STANDARDS Collom – Rule 4, Page 3 Revision Date: 6/20/22 Revision No.: MR-242 4.03.2 Access Roads In order to obtain access to the Section 26, Section 25, Section 36, and Middle sediment ponds, access roads will be constructed as shown in Volume 18B, Exhibit 7, Item 23. Use of these access roads will be for routine environmental monitoring and maintenance activities. Typical road use would consist of several trips per week by a light use vehicle using one way travel and low speed. For design information of the access roads please see Exhibit 7-23 Figures D1 and D2. Any outslopes created from the construction of this access road will be seeded with the mix listed below, post construction. Several temporary access roads will be constructed to allow access to construct the west side sediment control system and to temporarily haul topsoil to a stockpile. These temporary access roads will be constructed in accordinace with Volume 18B, Exhibit 7, Item 23, Part D. Any outslopes created from the construction of this access road will be seeded with the mix listed below, post construction. At the entrance to Jubb Creek off Moffat County Road 32, an access road will be established from the temporary facities area to where it ties into the Collom haul road. This access road will allow equipment, supplies, and man power to access and egress during the development of the Collom haul road and Collom factilites area. The Jubb Creek access road will be constructed in accordance with Volume 18B, Exhibit 7, Item 23, Part D. Any outslopes created from the construction of this access road will be seeded with the mix listed below, post construction. All access roads are designed to meet the standards of Rule 4.03.2 for Access Roads. They are specifically designed to meet the minimum design requirements while minimizing additional disturbed area and preventing environmental damage. Additional discussions of these access roads may be found under Section 2.05.3(3). The access road cut/fill stabilization seed mix is as follows: Western wheatgrass @ 4 Lbs PLS/Acre Mountain Brome @ 4 Lbs PLS/Acre Kentucky Bluegrass @ 2 Lbs PLS/Acre Sanfoin @ 2 Lbs PLS/Acre Total 12 Lbs PLS/Acre Following construction, a report by a registered professional engineer shall be provided to the Division indicating that the roads have been built as designed. Following mining activities, the access roads may be request to remain in place as a private ranch road and therefore would not be reclaimed. Should the access roads be requested to remain post-mining, the applicable surface owner and Colowyo will provide the Division with a letter documenting this request at the appropriate time. 4.03.3 Light-Use Roads Light roads may be used in portions of the Collom permit expansion area. Typically, these roads are existing ranch or two track roads that were exisiting prior to the development of the Collom operation. Construction and maintenance of these roads are discussed in the Volume 1, Section 4.03.3. Several light-use road will be utilized to support construction and long-term access to the power line that will provide power to electrical powered equipment in the Collom Pit. The light use road located in the