PERMFILE71854

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: pages 2.04-110 to 2.04-190
• Section_Exhibit Name: 2.04 Environmental Resource Part 2
• Media Type: D
• Archive: Yes

West Elk Mine
• concentration of carbonate is small to moderate. Calcium carbonate equivalents in units 16 and 17
range from about 4 to 15 percent with an average estimated to about 8 percent.
Under normal circumstances the genetic concentration of cazbonates occurs below the zone of
maximum rooting and has little or no effect on the soil's fertility. Some depression in available
phosphate might result if this material would constitute the bulk of the root zone through
disturbance. If these materials were mixed with other soil materials, as would be the case if they
were transported to other locations and used for new seedbeds, the concentration of carbonate would
be diluted to the point where it would have little or no effect on fertility of common plants.
Table 21 Summary of the Suitability of West Elk Mine Soils as Seedbed
Material
L J
Mapping Unit Good Moderate Poor
t x
a x
5 X
6 X
X6 X
16 X
17 X
18 X
20 X
X25 X
26 X
X26 X
27 X
30 X
X30 X
31 X
X31 X
X32 X
33 X
X38 X
Texture
The high clay content of the soils of units 5, 31, X31, and X32 with their large shrink/swell ratios
poses a serious limitation to their use. Unit X32 is particularly limited in this respect. It has the
highest clay content and widest shrink swell of any mapping unit in the survey.
The soils of units 5, 31, and X31 are considered marginally usable for revegetation. Seedbeds in
these soils can be established with some difficulty but can be worked successfully only over a
narrow range of soil moisture. They would require careful management if used for revegetation
• purposes. Unit X32 is considered unsatisfactory for seedbed material and would require very
careful preparation if soils of this unit are to be revegetated, even in their undisturbed condition.
2.~4-129 I/94PRO5; 8/94TR71; Reviscdlun. /995PR06