2011-03-22_PERMIT FILE - C1981033A

• Permit No: C1981033A
• IBM Index Class Name: Permit File
• Doc Date: 3/22/2011
• Section_Exhibit Name: Rule 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

The coal deposits along the North Fork of the Gunnison River lie in
Cretaceous rocks. As a result of regional uplift, the formations
with Cretaceous rocks are characterized by a natural bench with
steep topography along the North Fork of the Gunnison river.
Hence, the coal is exposed in a deep, essentially narrow canyon on
the faces of what Colorado characterizes as naturally occurring
highwalls, formed over centuries. Due to the rapidly increasing
overburden thicknesses in this area with these outcrops, most of
the portal areas along the North Fork of the Gunnison lie along the
steep outcrop of the coal, with the development of portals into the
coal seam.
The result of this method of extracting coal is the development of
benches, roads and other surface operation facilities in the
canyons.
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2.05-34 Rev. 04-30-93
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