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PERMFILE129847
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PERMFILE129847
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Entry Properties
Last modified
8/24/2016 10:30:49 PM
Creation date
11/25/2007 8:15:45 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056A
IBM Index Class Name
Permit File
Doc Date
1/2/2007
Section_Exhibit Name
2.05 Operation and Reclamation Plans
Media Type
D
Archive
Yes
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concrete, respectively. The retaining wall for the reclaim tunnel required approximately 30 CY of concrete, the <br />piers for the reclaim tunnel required 36 CY of concrete, piers for the various bents required 62.5 CY, and a <br />transformer pad required 4 CY of concrete. During construction of the reclaim tunnel and retaining wall Ditch D-3 <br />was relocated to the south. The ditch and culvert sizing does not change as a result of this relocation. The locations <br />• of the referenced structures are shown on Map 24, Surface Facilities. <br />The Coal Preparation Plant structures are of steel-frame construction with steel siding and roofs, and typical <br />construction techniques were used to complete the installation of these structures. Typically this included use of a <br />crane or boom truck to set structures and the use of metal fabricating equipment for construction. The approximate <br />dimensions of the structures are as follows: <br />Prepazation Plant Building - 48 x 54 x 76 feet <br />Thickener Tank - 35-foot diameter x 18 feet deep <br />Refuse Bin - 2 x 54 x 76 feet <br />Transformer Pad <br />Low-quality coal is transported by a front-end loader from the Low-Quality Coal Stockpile to the plant feed grizzly. <br />Coarse material, consisting primarily of 4 inch plus waste rock, is diverted from the grizzly to a chute and temporary <br />storage area on the north side of the Preparation Plant. This material is periodically recovered, loaded into haul tmcks <br />and transported to the approved waste pile for placement and disposal along with the coal refuse generated from the <br />washing process. <br />From the plant feed grizzly, the low-quality coal material is conveyed into the plant for processing through the plant. A <br />reclaim tunnel, feed conveyor, and hopper transfer the low-quality coal into the Coal Preparation Plant. The plant is <br />designed to process approximately 250 tons per hour using a heavy media (magnetite) to sepazate coal from waste rock <br />inclusions. Two magnetite storage bins (50 and 100 tons) are located adjacent to the plant. A thickener tank is <br />constructed adjacent to the plant. An emergency overflow sump adjacent to the plant provides overflow storage <br />capacity in the event a power outage occurs and the thickener has to be partially or fully drained. The overflow sump is <br />• sized to hold the entire contents of the thickener while maintaining one-foot of freeboard. In the event the thickener has <br />to be dumped, the material will be pumped back into the system or to Pond D. <br />After the low-quality coal is processed, clean coal is transfen-ed directly onto the overland belt or transferred via <br />conveyor to a clean coal stockpile adjacent to the Prepazation Plant. A front end loader can be used to transfer the <br />stockpiled clean coal to a feed bin on the overland belt. The clean coal will then be transferred via the overland belt to <br />the tipple. The processed clean coal may also be utilized in the production of stoker coal, with the stoker coal stockpile <br />located on the west side of the Preparation Plant. The circular stoker coal stockpile azea is located on the west side of <br />the preparation plant and encompasses an approximately 120-foot diameter azea centered below the stacking conveyor. <br />The clean coal stockpile is approximately rectangulaz in shape and encompasses the westernmost portion of the ROM <br />coal stockpile area as depicted on Map 24. This azea is approximately 200 x 250 feet. Up to three feet of coarse rock <br />material (coarse refuse from the grizzly) was laid down as base course in these azeas. In total, 1,260 yards aze spread <br />under the stoker pile and 5,560 yards are spread under the clean coal pile. This material will be excavated and relocated <br />to the approved refuse disposal azea during reclamation of the prepazation plant facilities. <br />The refuse material generated during the washing process is transferred via a conveyor belt to a refuse bin. Refuse is <br />transferred from the bin to haul trucks which transport the refuse to the designed Coal Refuse Disposal Facility. In <br />order to reduce the amount of refuse hauled to the refuse pile TCC pumps the thickener tmderflow (refuse fines mixed <br />with water) directly into abandoned and sealed underground workings. The material is pumped into the mined-out <br />longwal( panels in the Eastern Mining District. The underflow is pumped via a 4-inch line to an existing fresh water <br />borehole into the mine. The bottom of the borehole is plumbed into a pipeline tenninating at a discharge point located <br />behind the seals in the EMD. The process is described in greater detail under Rule 2.05.3(9). <br />On completion and commissioning of the Coal Preparation Plant, TCC temporarily stockpiled material generated <br />during the start-up period to allow sampling and evaluation of the quality of the reject material being produced and <br />TR06-53 2.05-30 06/20/06 <br />
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