PERMFILE123597

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 1/15/2002
• Section_Exhibit Name: Rule 2.04 Environmental Resources
• Media Type: D
• Archive: Yes

• 2.04.9 Soils Resource Information
(1) In general, the soils within the proposed disturbed area are shallow to deep,
moderately steep to very steep, well drained stony soils that formed in
residuum, colluvium, and alluvium derived from sedimentary rock and rock
outcrop. The soils in the northern portion of the permit area, above the
proposed disturbed area, are deep, nearly level to steep, well drained loam
and stony foam that formed in outwash from igneous rock.
(1)(a) Description, sampling and analysis of soil horizons in sufficient detail to determine
the horizons suitable for salvage.
The area to be disturbed by the surface operations and facilities at the mine
site were segregated into six map units numbered 1 through 6.
Map Units 1. 2 and 3
Map units 1, 2 and 3 are the Absarokee part of the Beenon-Absarokee
• association, 20 to 60 percent slopes. The Absarokee soil is well drained and
overlies bedrock at a depth of 20 to 40 inches. It formed in locally
transported sediment derived from sandstone and interbedded shale.
Typically the surface layer of the Absarokee soil is dark grayish brown loam
about 7 inches thick. The subsoil is brown clay about 18 inches thick. The
substratum is light brown channery clay loam. Sandstone is at a depth of
about 30 inches.
Field investigation of this map unit shows the soil has virtually no profile
which is contradictory to the general soil description. The thickness of the
A horizon averaged only 1.5" to 2.5". The soil is deep with a combined A and
B horizon depth that ranges from 22" to 38". Laboratory tests show this soil
is a silt loam and silty clay loam and medium to dark red-brown in color.
Based on the soil's physical, fertility and salinity characteristics presented in
Exhibit 7, the A and B horizon are suitable for salvage.
•
PR-06 2.Od -46 - 8/01
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