2014-04-25_PERMIT FILE - C1982056A (3)

Home Browse Search

stockpiles of sand, gravel, cement, and other materials. The entire batch plant was removed following completion of construction. A washdown water drain-line was constructed from the west side of the Batch-Weigh Loadout • building to Pond C. The drain-line is a PVC pipe mounted on a set of three support poles and sloped to drain. The locations of the support poles are shown on Map 24 under the label "Batch Weigh Drain Line". The new MCC building was constructed at the location depicted on Map 24. The building is asteel-framed, metal- sheathed building constructed on a concrete foundation. Building dimensions are approximately 20 x 20 x10 feet. The building foundation consists of a 12-inch thick poured-concrete floor supporting 8-inch thick, 3-inch tall poured-concrete stem walls. Site configuration required the Batch-Weigh Coal Stockpile to cover Ditch D-1 along the northern margin of the stockpile for a distance of approximately 440 feet. In this azea, Ditch D-1 was routed through a 24-inch diameter CMP culvert beneath the stockpile or through a combination of culverts providing the same hydraulic conveyance capability. Culvert sizing is based on a revised evaluation of Ditch D-1 design requirements (refer to Exhibit 8). Ditch D-1 was also re-routed slightly to the north as shown on Map 24. The Batch-Weigh Coal Stockpile and surrounding area aze graded to slope towards Ditch D-1, which proves perimeter sediment control for the area and routes runoff to Pond D. Temporary diversion ditches upgradient of the Batch-Weigh Coal Stockpile aze designed and constructed to intercept overland flows and convey water away from the coal stockpile azea and into Ditch D-1. The temporary ditches aze designed according to the specifications presented in Exhibit 8. Temporary sediment control measures consisting of silt fences and or berms were installed down-gradient from the constmction site during construction, as appropriate until permanent drainage control was established. The powerline configuration in the vicinity of the batch-weigh system facilities was changed to accommodate the new structures. Electrical equipment from the substation located at the site of the Batch-Weigh Coal Stockpile was relocated to the substation installation adjacent to County Road 27. The 4,160 volt powerline, in the vicinity if the batch-weigh system facilities, was rerouted as depicted on Figure 21. The existing 69 KVA powerline in the area was • removed, with the poles reutilized in the new 4,160 volt alignment. A net of 9 poles were removed as a result of the powerline reconfiguration. A concrete pad is required for a transformer at the Batch-Weigh Loadout facility. The pad is a 6 x 8 x 0.5 feet and is constructed of steel-reinforced concrete. Map 24 shows the location of this pad at the east end of the access road to the Batch Weigh Loadout building. The transformer and pad will be removed when no longer needed. Surav Svstem A pad was constructed between the batch-weigh system and the east end of the train tunnel to aid in application of freeze-proof agents to the coal and car sides. The pad location is shown on Map 24, Surface Facilities. A metal post with spray wand is anchored to the pad. The wand extends over the coal cars to apply side release agent to the car. When the system is no longer needed, the pad, post, and spray wand will be removed from the site. This will occur during final reclamation of the site, and final grading will be incorporated into railroad track removal. Truck Loadout In 2006, a new truck Loadout was permitted to efficiently handle loading of an increased number of over-the-road haul trucks transporting coal to the nearby Xcel Hayden Station Powerplant and other regional customers. The new truck Loadout is located in an existing coal stockpile area on the south side of Foidel Creek and the west edge of the mine facilities area, west of the existing Batch-Weigh Railroad Loadout. Existing Haulroad A will be extended to connect with Routt County Road RCR27 to provide direct truck access from the western portion of the mine property under a separate Technical Revision submittal. Components of the truck Loadout addition include: • • Concrete reclaim bunker and vibratory feeder • 10-foot diameter steel reclaim tunnel • 42-inch diameter escape tube and fan TR06-53 2.05-37.2 06/20/06