2008-06-09_REVISION - C1980007 ‎(3)‎

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 6/9/2008
• Doc Name: Revised Pages Part 2
• Type & Sequence: TR111
• Media Type: D
• Archive: No

Soils
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oversight from the OSM, which govern all
direct effects of coal mining, including those
that ,may impact geology. These acts and
attendant regulations require that topsoil be
removed, stockpiled, and replaced on reclaimed
surfaces associated with construction or mining
disturbance. Other impacts to the geologic
resource that may occur as a result of mining,
including landslides and erosion, must be
mitigated to stabilize the surface and return the
land to an approved post-mining land use.
$OI~S
Affected Environment
The analysis area for soil resources is the
i~rn~anf orP~ Qnt~c 7n ttlP T~Yl~I P!`t '.IYPA l~PVPIO7lP(1
from a combination of residual, colluvial, and
alluvial materials derived from local. bedrock
(Figure 9). The soil. survey (fryer and Hughes
1997) describes 12 map units that could be
affected. The map unit name, dominant soil.
series and attendant percent map unit
composition, relative depth, hazard
classifications (water erosion., shrink swell, and
mass movement), and. considerations described
in the soil survey are shown in Table 3-2 and
Figure 9.
Table 3-2
Summary of Soil Resources
% of Hazard /
U
it N
S
il M
Soil Map Unit Dominant Depth ame
ap
n
o
Name /Number Soil Series Map Class Water Shrink Mass Number
Unit Erosion Swell Movement
Broad Canyon -Scout Broad Canyon 50 VD L L L Soil erosion in steeper areas;
family complex, and similar soils
low water-holding capacity;
5 to 25% slopes Scout family and 35 VD L L L subsurface rock fragments.
111 similar soils
Cerro -Henn Cerro and similar 45 VD L H L High shrink-swell potential;
complex, soils slow permeability; clayey
surface soil textures; clayey
0 to 15 percent slopes Hern and similar 40 VD L H L subsurface soil textures.
116 soils Corrosivity in Cerro soils.
Coberly -Falcon, dry Coberly and 45 MD L L L Shallow bedrock; low water-
complex, similar soils holding capacity.
0-15% slopes dry and
Falcon Root limiting layer in Falcon
124 ,
similar soils 40 S L L L dry soils.
Cryochrepts soil
35
S - D
L - H
L
L - M Steep slopes in some areas;
Cryochrepts -
and similar soils
high soil erosion hazard in
Cryoborolls; rubble the steeper areas; subsurface
land complex, Cryoborolls and 30 S - VD H L M rock fragments, moderate
15-90% slopes similar soils mass movement potential.
130 Large exposures of loose
Rubble land 25 rock.
Limited available water
Cumulic Haploborolls, Cumulic capacity; subsurface rock
1 to 3% slopes Haploborolls and 85 D - VD L L L fragments; spring runoff
131 similar soils flooding; low bearing
ca acit ;subsurface rock
Deer Creek Ventilation Shaft and E Seain Methane Drainage Wells FEIS
73