2018-05-18_PERMIT FILE - C1982056A ‎(4)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 5/18/2018
• Section_Exhibit Name: Exhibit 49K Washplant II - Design Drawings
• Media Type: D
• Archive: Yes

e. Belting 3-ply 500PIW,
f. Take-up gravity 4,600 lbs (the take-up will need to be incorporated into the
design and located inside of the building)
g. Pulleys
i. Head/drive pulley 24 x 57 face width
ii. Take-up and bend pulleys 18 x 57
iii. Tail 24 x 57
h. Drive
i. Gearbox Dodge TXT825A 24.59:1 with 12" sheave
ii. Motor 50 hp 480 volt with 9" sheave
iii. Drive system VFD
3. Screen
a. The screen will be removed by a third party contractor and refurbished. (Allis
1994 Order number 08202 existing in Twentymile's 1994 Industrial Systems
Washplant).
b. Screen reaction forces and loads, at operating and resonant speeds will need to
be obtained from Metso the successor company to Allis.
i. Allis (Metso) 8'x 16' Double Deck Screen
ii. Top Deck 2" x 2"
iii. Bottom Deck 1"x 1"
***Material recovery percentages from the September 2017 power screen test;
>2"=5%
2"x1 "=72%
<1"=22%
4. Truck Loading System
a. A truck loading system that minimized the degradation of the stoker coal will be
incorporated into the system. This may include a conceptual approach of the use
of two bins that have the capability of being automatically lowered to load the
Wilson® GDD02397CMA dual hopper trailers that are currently being used to
transport the coal. A design criterion of the loading system is to minimize the
free fall distance and velocities of the sized coal in order to reduce the "chipping"
and fines generation that occurs with excessive handling. The system shall be an
automated system with manual capabilities. The design of the loading system
may be passed on to a third party if the design engineer determines that its
design requirements would be out of the realm of his expertise.
5. Reject conveyor
a. A reject conveying system shall be designed to convey the over and under sized
material back to the overland conveyor belt. Ideally this conveyor would load
onto the overland within the existing envelope of the 1400 tph wash plant.
b. The system shall be a 30" or 36" conveyor with a capacity of 200 tph.
c. There are two existing conveyors; the plant feed conveyor and the clean coal
stack conveyor located in the old wash plant along with the components of the
William's Fork 1903 and 1904 conveyors that can be retrofitted and repurposed
for this application.
6. Fugitive Dust Collection
a. A fugitive dust system utilizing a Spendrup wet scrubber system shall be
incorporated into the system.
b. The conveyor discharge / screen feed box and the screen discharge / loading
system feed areas shall be the minimum draw points of the system.
7. Heating
4