2018-06-05_PERMIT FILE - C1981019A (7)

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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 Maps 21 and 25G. 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). Haul Road B runs from State Highway 13 west to where it intersects Haul Road A and 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). The reclamation timeline is shown on Map 29 — Spoil Grading. Reclamation will include regrading the road embankments and ditches and recontouring the road to the approved AOC as shown on Map 19 — Post Mining Topography South Area. The regraded areas will then have topsoil replaced and be reseeded. All of this disturbed runoff will drain to either a sediment pond or an approved SAE, as appropriate. Various best management practices are utilized- to minimize air and water pollution. Haul Roads A and B have been paved with asphalt to control air and water pollution, and ditches and culverts exist to control runoff. The haul road A and B outslopes are vegetated to control sediment. Portions of the Haul Road A are located in the vicinity of segments of Taylor creek that are deeply incised, eroded and unstable. Rock lined energy dissipators are employed to reduce erosion on these -steep banks. Protected ditch runouts to the natural drainage are employed to reduce erosion. Small dugouts are employed as sediment traps. Rule 4 Performance Standards 4-2 Revision Date: 3/16/18 Revision No.: TR -119