2010-12-17_REVISION - C1981019 ‎(108)‎

• Permit No: C1981019
• IBM Index Class Name: Revision
• Doc Date: 12/17/2010
• Doc Name: Rule 2.05 Operation and Reclamation Plans
• Type & Sequence: PR3
• Media Type: D
• Archive: No

RULE 2 PERMITS
fill along its entire length. The spoilpile will be confined by the valley slopes on both sides. Volume 20,
Exhibit 23, Item 1 provides the geotechnical report for the temporary spoil pile.
The temporary overburden stockpile will be constructed in 50 to 100 foot lifts by use of trucks, dozers
and loaders. Initially, each lift will be dumped at angle of repose and then subsequently dozed down to an
overall slope of less than 3H: IV. The side slope of the active dump will not exceed a 33 percent overall
slope and will be maintained during active times of operation (See Map 29C — Temporary Spoil Pile
Design). Maintenance techniques will consist of blading of roads and ramps, along with the use of dust
control during active times of operation. During construction a dozer will be used develop and spread the
end -dumps created by the trucks, this will be the primary method used to build the temporary overburden
stockpile. Sediment control will be implemented to ensure adequate containment of potential runoff
throughout the life of the operation. Temporary seeding may be employed during inactive times of
operations on the temporary stockpile to reduce the erosion potential. Following the completion of
mining, this temporary overburden stockpile will be removed and placed back into the open pit. The area
that was disturbed in conjunction with this stockpile will be reclaimed in accordance the procedures
outlined in the reclamation plan.
2.05.3 (7) Coal Handling Structures
Please Refer to Volume 1, Section 2.05, Coal Handling Structures and Map 22B.
2.05.3 (8) Coal Mine Waste and Non -Coal Processing Waste
Not applicable. Colowyo uses dry crushing facility for coal preparation; no coal processing waste, as
defined in Rule 1.04 "Definitions ", is produced from any part of the mining operations.
2.05.3 (9) Return of Coal Mine Waste to Abandoned Workings
No coal processing waste or coal mine waste as defined in Rule 1.04 "Definitions" is produced from any
part of the Colowyo mining operations. Therefore this section is not applicable.2.05.4 (1)Reclamation
Plan
The reclamation objective for the Collom permit expansion area is to restore the mined area to a land use
capability which will be equal to or better than that which currently exists. Reclamation activities must
return the mine area to previously determined pre -mine land uses. Reclamation practices aim to stabilize
soils, maintain hydrologic and vegetation resources, and restore the approximate original contour of the
mined area. Mined areas within the Collom permit expansion area will be returned to their approximate
original use as rangeland with watersheds having their approximate pre- mining character. In general, the
long term appearance and usefulness of the mine area will be similar to that which would have been
encountered prior to any mining.
The proposed postmining topography closely mimics the premining topography and all major drainage
features and stream beds will be reestablished. In some cases, the postmining slopes will be moderated.
All areas of the postmining topography have been designed at a maximum slope of 3H:1 V to facilitate
reclamation activities and model the inferred pre- stream incisision topography.
Collom — Rule 2, Page 99 Revision Date: 1/23/09
Revision No.: PR -03