Laserfiche WebLink
Originally, the stockpiled coal was fed by gravity through feeders to the train loading facility. During loading, the <br />train would back through the tunnel under the stockpile to load, with loaded cars following the tail -track around <br />• Pinnacle Peak. The location of the track is shown on Map 24. The new Batch -Weigh Loadout replaced this system <br />and, while the prior loadout system components are still in- place, they are not currently utilized. <br />• <br />is <br />The coal - handling system was modified to incorporate construction of a conveyor belt (Belt- Out -Back (BOB)), <br />drive structure, belt take -up, and control building to move coal from the Secondary Crusher Building to the <br />secondary ROM Coal Stockpile near the Tipple. The locations of the belt, drive structure, and control building are <br />shown on Map 24 (Surface Facilities). <br />TCC drilled a limited number of shallow holes in the area of the Tipple to provide foundation information for final <br />design of the BOB conveyor. A total of approximately seven 4 -inch diameter holes were drilled, radiating from a <br />point adjacent to the Secondary Crusher Building outward to the secondary ROM Stockpile. An auger rig was used <br />to drill the holes, which varied in depth from 20 to 60 feet. The holes were drilled within the previously disturbed <br />area, and if no ground water was intercepted, the holes were backfilled with the cuttings from the hole. Any hole <br />that intercepted ground water was sealed using a grout plug in the aquifer zone and then backfilled to the surface <br />with cuttings. <br />The support bents for the BOB Conveyor are of typical steel construction, with the further -most bent being of 4 -leg <br />construction, while the inner bents are of 2 -leg construction. The 4 -leg bent has been designed for a revetment <br />enclosure, in the event TCC should decide that this bent (constructed similar to the MR93 -93 revetment framing) <br />requires a protective covering at some future time (the bond calculation reflects the revetment enclosure). These <br />bents are supported by 48 -inch diameter concrete piers extending approximately 25 feet to bedrock. These piers are <br />connected by grade beams (footers) approximately 1 x 4 x 18 feet to form the foundations. The drive structure, of <br />steel -frame construction, is elevated on four 3 -inch diameter piers which extend approximately 25 feet to bedrock. <br />The 12 x 16 x 10 foot MCC building is of typical metal construction, and sets on a 12 x 16 x 0.5 foot concrete slab <br />constructed over 1 x 4 foot foundation footers. Soil was removed for pier construction using an auger rig or by <br />excavating with a backhoe or similar piece of equipment. The balance of the remaining site prep was completed <br />using a small dozer or backhoe. Subsoil removed for the installation of the piers, footer, and slabs was used to <br />backfill around the piers and footers, or was spread -out, depending on the situation. <br />The BOB Conveyor and associated structures are constructed within a previously disturbed area, with drainage <br />from this area controlled by the existing drainage control system. As such, no topsoil recovery occurred and no <br />significant drainage modifications will be required. The conveyor tailpiece was mounted within the existing <br />Secondary Crusher Building, and two support bents and an elevated drive structure were constructed on the west <br />side of the Secondary Crusher Building for the main 48 -inch belt structure. An additional concrete support slab, <br />immediately adjacent to the east wall of the Secondary Crusher Building, may be necessary for the belt take -up. <br />TCC has included the costs for this additional slab in the associated bond calculations. Power is supplied to the <br />BOB Conveyor from the substation east of the Tipple over to the MCC building. <br />CYCC's loadout site was constructed within the disturbed area between the processing facilities and the railroad <br />tracks. The site was excavated down to the elevation of the tracks. A ramp was built -up to accommodate loading <br />of the cars. The site is approximately 150 x 300 x 6 feet. Approximately 10,000 CY was excavated from the site, <br />with some of the excavated material placed east of the site near the railroad tunnel and road, allowing for improved <br />drainage from this area. The drainage from this area will <br />MR09 -238 2.05 -33 06/26/09 <br />