PERMFILE120668

• Permit No: C1981016
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Main permit narrative
• Media Type: D
• Archive: No

environment from transitional Lower Delta Plain to Upper Delta Plain (fluvial).
• In the vicinity of the Hawk's Nest Mine these coals are, in ascending order:
1. D Seam - This attritial coal apparently thickens southward with a
range of about six feet to over fourteen feet (excluding splits).
This coal directly overlies the Bowie Member and generally has very
good floor and roof sandstones.
2. Wild Seam (Johnson's E Seam) - This coal is highly erratic with
generally discontinuous thin coals above and below a mineable coal,
with a characteristic thickness excluding splits from five and one-
half to ten feet. The coal invariably exhibits numerous splits and
generally has poor roof and floor sediments (usually carbonaceous
shales and interbedded siltstones).
3. E Seam (Johnson's Hawk's Nest or F Bed) - This is the coal mined at
the Hawk's Nest Mine. It is an attritial coal with a range in
thickness of four feet seven inches to over twe]ve feet, generally
thickening to the southwest where a top rider seam adds approximately
two and one-half feet to the total thickness. Occasional coaly
shale splits occur to the northwest. floor sediments are generally
carbonaceous shale, but roof sediments are variable from carbonaceous
shales with interbedded siltstones to a good sandstone roof (generally
to the northwest).
• 4. F Seam (this coal was unnamed by Johnson) - It is generally erratic,
based on a limited number of core holes, ranging from several feet
up to about eight feet total coal thickness. It is invariably split
by coaly shales and is not presently being mined in the Somerset
coal district.
Mining operations on the Hawk's Nest Mine Leases has consisted of a
continuous mining of the E Seam and the development of rock tunnels to the
underlying Wild Seam and D Seam.
The clastic sediments associated with the coals of the Paonia Member
are more continental in character than those of the underlying Bowie Member,
although occasional marine sands apparently represent minor transgressions
of the Cretaceous Seas. The top of the Paonia Member was marked by Johnson
as a thick continuous sandstone that can be seen outcropping along the
drainage of the North Fork Gunnison River in the vicinity of the Hawk's Nest
• Mine.
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