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` _ C III IIIIIIIIIIIII III Doc Date:12/11/2001 4.03 ROADS ollowing 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). various best management practices are utilized to minimize air and water pollution. The haul roads have been paved with asphalt to control air and water pollution, and ditches and culverts exist to control runoff. The haul road outslopes are vegetated to control sediment. Portions of the haulroad 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 reduces erosion. Small dugouts are employed as sediment traps. Vegetated a=eas are utilized as sediment filters. The haul road is under constant routine maintenance to avoid damage to environmental values. The construction of both haul road segments was completed in 1977. The • Rev'sion Sutmined -S , 7 99 Revision No. ~~ R - 53 4.03-1