2016-06-08_PERMIT FILE - C1982056A (4)

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construction of the Haul Road B Driveway, to assure that the driveway does not disrupt established drainage patterns in the area. • Haulroad B was constructed on compacted spoil material and selected spoil material was also used as fill in low areas. This is a previously disturbed area, and as such, no topsoil was available during either road construction or relocation for salvage. Road construction involved removal of organic material from road foundation areas, compaction of the remaining material where fills were not required (the Haulroad B relocation did not require any 'fill placement), and controlled placement and compaction of spoil material -for required road -fills. Lifts did not exceed 36 inches in thickness, and were compacted and tested per AASHTO T-99 or similar specifications. Haulroad B is surfaced with approximately 6 inches of compacted gravel or granular spoil material. 2C. Haulroad B Extension The Haulroad B Extension, approved under MRO I-175, is a short segment of haulroad running on the southwest side of Pond D and connecting Haulroad B-1 and the Refuse Pile Haulroad, as shown on Map 24, Surface Facilities. This road segment was designed and constructed to the same standards as Haulroad B-1. The centerline road profile for the Haulroad B Extension is included as part of the Haulroad B-1 profile, and the profile and typical cross-sections are shown on Map 30, Road Profiles and Cross -Sections. During 1996, the road was upgraded through placement of approximately 4 inches of Class VI base course and 6 inches of pit run gravel. 2D. Haulroad A (TR06-56) Haulroad A was previously approved, permitted, and certified under CYCC Permit C-81-071 (formerly 179-77). The original Haulroad A extended from the old west entrance (Routt County Road 27) to the road intersection east of the current scoria storage area. Design information for the original Haul Road A is presented in Exhibit 250, and design information and profiles for the remaining portion of the road are provided in Exhibit 49J. In order to support increased over -the -road truck haulage of coal to Xcel Energy's Hayden Station and other • regional coal customers, TCC upgraded and extended Haulroad A between the new truck loadout (TR06-53) and Routt County Road RCR27. The west end of the new haul road connects with entrance and exit road segments, constructed by Routt County Road and Bridge Department, at the edge of the existing Routt County Road and Bridge right- of way for RCR27. The entrance road segment is a deceleration lane coming off of and paralleling RCR27. The exit road segment crosses under RCR27 through an arch -culvert underpass, with an acceleration ramp connecting the exit road segment with RCR27. In order to verify design parameters for both new road construction and road reconstruction, geotechnical test borings were completed and a road design report prepared. Design information and profiles for the new Haul Road A are presented in Exhibits 25W, Haulroad A - Geotechnical Road Designs, and 49J, Haulroad A -Design Information; and road location is shown on Map 24, Surface Facilities and Freshwater Systems. The overall road grade is less than 10 percent and no portions of the road exceed 10 percent grade. The new West Haulroad (Haulroad A) and associated facilities include: • 1,800 feet of new and re -constructed haulroad • 100 -ton truck scale with reinforced concrete foundation and wash -down pit • Access ramp for clean-out of wash -down pit • Drop -line from the existing adjacent powerline to provide power for the scale • Buried drain -line and valving from wash -down pit to Sedimentation Pond B, and fiber-optic cable to Truck Loadout Building • Appropriate road signage The new truck loadout and associated facilities is generally constructed within existing disturbance areas (westemmost 300 feet of road required some new disturbance), so road construction resulted in minimal new surface disturbance. Existing vegetation and available topsoil materials were stripped from any new disturbance areas and placed in existing topsoil stockpiles. As an existing disturbance area, most disturbed area runoff was already captured and controlled by the existing drainage and sediment control system, however, roadside ditches TR06-55 2.05-69 07/26/06