2022-10-17_PERMIT FILE - C1981019A ‎(29)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 10/17/2022
• Doc Name: Permits
• Section_Exhibit Name: Volume 15 Rule 2
• Media Type: D
• Archive: Yes

RULE 2 PERMITS

Collom – Rule 2, Page 74 Revision Date: 4/28/22
Revision No.: TR-154
areas are steeper or shallower based on field conditions encountered during construction (please see Map
25E Sheet 3).

There is one main haul roads that has been constructed to haul coal from the Collom Pit to the Collom
crusher area. This haul road is shown on Map 25D. Please see section 4.03.1 for details pertaining to this
haul roads and other haul roads that will be constructed within the mining area.

Several access roads have been constructed to support mining operations at the Collom mine. Two access
roads were constructed to the Section 25 and 26 sediment ponds, an access road was constructed to access
the Collom Haul Road from the Jubb Creek entrance off Moffat County Road 32, and several temporary
access roads were established to support intial mining operations. The locations and as-built
configurations for these access roads are provided in Volume 18B, Exhibit 7-23, Part D, Figures D1
through Figure D4.

2.05.3 (4) Operation Plan – Ponds, Impoundments, and Diversions

To control runoff, and protect surface and ground water quality, Colowyo constructed several
sedimentation ponds and diversion ditches. All ponds and diversions are designed to meet or exceed the
requirements of 2.05.3(4) and 4.05.6. All sediment ponds are maintained in accordance with the
parameters mentioned in Volume 1, Section 2.05. Impoundments will be inspected quarterly as discussed
in Section 4.05.6. Please refer to Volume 18B Exhibit 7, Item 23, Parts A, B, C, and G for the sediment
control plan during mining operations. Please refer to Volume 18B Exhibit 7, Item 23, Part I and Volume
18C Exhibit 7, Item 23, Parts J, M, and N for the sediment control plan post mining.

The sediment ponds and temporary diversion channels will remain in place until such time as the entire
disturbance footprint area reporting to these structures is reclaimed, and the entire contributing watershed
has achieved Phase II bond release in accordance with Rule 4.05.2(2).

One containment pond (Wilson Storage Pond) is utilized to store water as needed to support mining
activites. Water is pumped or trucked in from an exisisting Colowyo held water right and is stored in the
Wilson Storage Pond and utilized for dust suppression and other water needs. The design for this storage
pond can be found in Volume 18C, Exibit 7, Item 23, Part L.

2.05.3 (5) Topsoil

Prior to any mining related disturbances, topsoil will be removed from planned disturbance areas as
discussed in Section 2.05 (Topsoil Redistribution Plan) and Section 4.06 (Topsoil) and redistributed or
stockpiled as necessary to satisfy the needs of the reclamation timetable.

Topsoil will be removed by bulldozers, loaders or scrapers as described in Section 2.05.3, Production
Methods and Equipment.

Topsoil stockpile locations and extent of stripping is presented in Topsoil Handling Map (Map 28C Sheet
1). Topsoil stripping will occur in advance of mining and can be anticipated to occur within the mine
plan blocks depicted on Map 23B. The overall life-of-mine topsoil balance is provided in Volume 1,
Table 2.05-1. An annual update to the overall topsoil balance for Colowyo is provide each year in the
annual reclamation report.

The stockpiling of topsoil will continue until all pit development has progressed to its maximum extent.
Areas available for final reclamation prior to mine closure consist primarily of backfilled pit areas.
Topsoil to cover these areas will either be direct placed from areas of topsoil removal activities or topsoil