2013-04-10_PERMIT FILE - C1981019 ‎(85)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 4/10/2013
• Doc Name: Performance Standards
• Section_Exhibit Name: Volume 15 Rule 4
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
4.03 ROADWAYS
The following sections identify roads as defined per Rule 1.04 (111).
4.03.1 Haul Roads
Access to the Collom Lite and Little Collom X mining areas will require the construction of a haul road
running northeast through the permit expansion area and near the active pit areas to support mine
operations. The construction and maintenance of the roadway from pit area to Gossard Loadout and pit
haul roads proposed near the Collom Lite Pit are discussed in Section 2.05.3(3). Locations of these
proposed haul roads are shown on Maps 25E, Sheets 1 -9 and 25D (Collom Haul Roads) respectively.
These haul roads will be constructed to meet standards set in Rule 4.03.1. All outslopes of this road
outside of the pit disturbance area will be seeded with the seed mix listed in Section 4.03.2 post
construction.
Following construction, a report by a registered professional engineer shall be provided to the Division
indicating that the roads have been built as designed. Following mining activities, certain roads may
remain in place as a private ranch road and therefore would not be reclaimed. Colowyo as the land owner
would have to provide the Division with a letter documenting this request at the appropriate time.
Haul roads that will be constructed in the actual mining areas will constantly change as the operation
progresses. The "in -pit" roads will be maintained by a motor grader and regularly wetted to minimize
dust as required by the air quality permit. Any drainage off the "in -pit" roads will be retained in the pit.
Colowyo will maintain the haul roads throughout the life of the mine with repairs including blading,
filling of potholes, and replacement of road surface as necessary. Likewise, watering for dust control will
be implemented as necessary. Other information relevant to haul roads is provided in Section 2.05.3(3).
4.03.2 Access Roads
In order to obtain access to the Little Collom Sediment Pond, an existing two track road will be upgraded
as shown on Volume 20, Exhibit 25, Item 1. This road, which is about 6,600 feet in length, has been
designed to meet the applicable portions of CDRMS Rule 4.03.2 for Access Roads. It is specifically
designed to meet the minimum design requirements while minimizing additional disturbed area and
preventing environmental damage. The road ties to existing county road 32. The completed road will
have a width of 12 feet. Additional discussions of this access road may be found under Section 2.05.3(3).
Use of road is for routine environmental monitoring and occasional pond maintenance only. Typical road
use would consist of one trip per week by a light use vehicle using one way travel and low speed.
Horizontal alignment will exactly follow existing two track road alignment and is consistent with existing
natural topography. Overall grade of the road is approximately 6 %. The existing two -track road will be
hard bladed to remove all vegetation and rutting and to provide a level surface across roadway, with
maximum cut and fill depths of less than 2 feet. Following blading, a minimum 4 inch thickness of
clean, minus 2 inch gravel shall be placed and compacted across the entire width. A triangular V -ditch
approximately 18 inches in depth shall be cut on the uphill (Eastern) side of the completed roadway.
Routine road maintenance will consist of occasional blading and drainage control. Any outslopes created
from the construction of this access road will be seeded with the mix listed below, post construction.
The access and proposed haul road cut /fill stabilization seed mix is as follows:
Western wheatgrass @ 4 Lbs PLS /Acre
Collom — Rule 4, Page 2 Revision Date: 9/28/11
Revision No.: PR -03