2011-04-08_PERMIT FILE - C1981012A ‎(7)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 4/8/2011
• Section_Exhibit Name: Section 2.05 Operation and Reclamation Plan
• Media Type: D
• Archive: Yes

be located on the surface at least 15ft out from the belt slope portal and over the top of
the belt slope portal.
Once development to the East Portal exhaust shaft is complete, the fans and ducting
will be removed. The rope slope will function as a fresh air intake and be equipped
with rail and a hoist for moving equipment and personnel underground. Details of the
rail and hoist system are included in section 2.05.3(3)(c).
Coal mining requires the use of inert dust to aid in limiting the explosibility of the
coal dust. A rock dust system will be installed on the surface. The system requires a
rock dust storage bin and compressor. The bin is constructed of steel with a capacity
of 150 tons. Details of the bin are included in Exhibit 28- Bond Calculations. The
bin foundation is concrete pylons footers. The rock dust system operates under
pressure produced by a compressor with an air regulator tank and dryer. The
compressor and tank and dryer are housed in a small metal building (20 ft x 20 ft)
with a concrete slab foundation on stem walls. The placement of the rock dust system
near the East Portal requires a small cut of approximately 17,500 cy. The cut material
will be relocated to the belt slope for use as fill to accommodate the surface conveyor
drive and takeup and if necessary on the fill required for the rope slope. The detail of
the cut and cross sections are shown as an inset on Map 11 Sheet 1 — East Portal,
Slope Track and Cuts.
A ditch is proposed to route storm water around the cut slope to maintain the integrity
of the slope. A trapezoidal channel with a bottom width of 0.5 ft, a height of 1 ft, side
slopes of 1:1, and a minimum slope of 3.25% will handle the peak flow of 9 cfs with a
10 year 24 storm of 3 inches. At the time of construction, the slope material
characteristics will be evaluated to determine if a drop structure is necessary to carry
the cut slope runoff. The detailed design is included as an addendum to Exhibit 19
Sediment Design Specifications.
The water distribution system will be re- established with updated pipe corridors,
water tanks and related pipe vaults as shown on Map 11 Sheet 2 East Portal
Utilities. Of the three existing water tanks on the slope above the portals, the two
located on the north end of the tank pad have been removed. The remaining 65,000
gallon raw water tank will remain in service. The water system will be augmented by
two additional steel tanks; one 400,000 gallon steel raw water tank will be located on
the tank pad and one 25,000 gallon steel potable water tank. The details of the tanks
and the foundations are included in Exhibit 28 — Bond Calculation. Water will be
pumped up to the tanks for storage and distribution. A 4" tank overflow line is
proposed that would direct overflow to pond 001.
The water pipelines and the associated control wiring will be upgraded. The potable
water system will consist of a 2 inch fusion joint HDPE DR 11 AWWA C906 pipe.
The mine drainage water system will consist of 10 inch fusion joint HPDE
DRI IAWWA C906 and 8 inch schedule 40 flanged steel pipe and fittings AWWA D-
100 beginning at vault -6 and continuing in a trench to vault 5 and 3. The raw water
system will consist of 16 inch HDPE DR I AWWA C906 and 12 inch Schedule 40
flanged steel pipe and fittings beginning at vault 6 and continuing in a trench to vaults
5 and 3. Pipe vaults are concrete construction pre -cast where possible. Vault 5 is cast
TR -54 Page 2.05 -5a Revised 12/01/10