2018-04-13_PERMIT FILE - C1981019A

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RULE 4 PERFORMANCE STANDARDS 4.02.5 Stream Buffer Zone Markers All major operations near Good Spring Creek have ceased. Stream buffer zone signs have been posted as appropriate. Stream buffer zone signs will also be placed along Taylor Creek and Jubb Creek as deemed appropriate. 4.02.6 Blasting Signs Colowyo displays signs reading `Blasting Area" along any blasting area that comes within 50 feet of any road within the permit area or within 100 feet of any public road right-of-way. The blast warning and all - clear signals are clearly explained at the main entrance to the permit area from Highway 13/789, where the Collom paved haul road crosses Moffat County Road 51, at the entrance to Lower Wilson along Moffat County 51, at the entrance to the Upper West Fork of Good Springs Creek, and at the Jubb Creek entrance on Moffat County Road 32. 4.02.7 Topsoil Markers Colowyo clearly marks all stockpile topsoil with signs reading "Topsoil." 4.03 Roads The following sections deal with roads defined per Rule 1.04 (111). 4.03.1 Haul Roads Haul roads at the Colowyo operation will be utilized and maintained to control or minimize erosion, siltation, air and water pollution, and damage to public or -private property. The main haul road A for the Colowyo operation is shown on the Existing Structures - North Map (Map. 21) and the Existing Structures - South Map (Map 22). The main haul road A runs from the pit area (traffic crossover) to the Gossard Loadout; the approximate length of this haul road is four miles. The profile for haul road A is shown on the Haul Road "A" Profile (Map 25). The haul road B was formerly the access road from Highway 13 to the haul road A intersection leading to the Gossard Loadout. Colowyo requested a change in the road status by Technical Revision in June, 1992. The status change was made necessary at the request of our customer Tri-State Generation and Transmission Association, Inc. (Tri-State) and their intention to transport coal to the Craig Station by truck rather than rail. The haul road B is shown on Existing Structures - North Map (Map 21) and Haul Road "B" Profile (Map 25A). The approximate length of the road is 1.4 miles. The roads used in the actual mining area constantly change as the operation progresses. The "in -pit" roads are maintained by a motor grader and are regularly wetted to minimize dust. Any drainage off the "in -pit" roads will be retained in the pit or diverted to the drainage and sediment control structures located on the Hydrology - South Map (Map 12). Due to the nature of the South Taylor Pit Expansion, Colowyo will construct and maintain a haul road that will be located within the Disturbance Boundary and partially outside the active mining boundary. The South Taylor Haul Road's location can be found on Map 23 — Mine Plan South Area with its design details being located on Map 25C — South Taylor Haul Road. Please refer to Permit Volume Twelve, Section 4.03.1 — Haul Roads for text related to this haul road. Reclamation of the South Taylor Haul Road to AOC will be addressed as required by Rule 4.03.1(7) and will take place after Colowyo has determined that the road will no longer be needed for operations, reclamation or monitoring and presumably during reclamation of the final pit area. The reclamation timeline is shown on Map 29 — Spoil Grading. Reclamation will include regrading the road embankments Rule 4 Performance Standards 4-2 Revision Date: 8/28/17 Revision No.: TR -115