PERMFILE56635

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: SOIL INTERPRETATIONS
• Section_Exhibit Name: TAB 09 ADDENDUM 5
• Media Type: D
• Archive: No

Footnotes:
'Texture of Control Section: as defined in Soil Taxonomy (pp. 38386). The textural control section is generally the upper 20 inches or the whole of an argillic horizon; or from
10-40" or bedrock, whichever is shallower; or the whole soil if bedrock is 14' deep or less.
'Depth: refers to the soil profile depth before encountering bedrock or a paralithic contact.
Depth Class Inches
Very Shallow <10
Shallow 10-20
Moderately Deep 20-40
Deep 40-60
Very Deep 60+
'Major Rooting Depth: depth to which the majority of plant roots were observed to occur.
'Internal Drainage: refers to aeration or saturation characteristics within the soil profile. Well drained soils albw water to move through the profile readily but not rapidly, and
soil creation is typically not a problem. Somewhat excessively drained soils allow water to move rapidly through the profile, and are typically droughtly, sandy, and poorly
developed. Somewhat poorly drained soils have a wet state relatively high in the profile for a significant length of time to impede most uses, unless artificially drained.
'Permeability: Permeabildy is a characteristic of soil which relates to the movement of water through the profile. Permeability criteria are based on the rate at which water moves
kn through the most slowly permeable layer to a depth of 60 inches in a saturated soil profile.
N
Permeability Class
Rate finches/hour)
Typical Soil Texture
Very Slow
Slow
Moderately Slow
Moderate
Moderately Rapid
Rapid
Very Rapid
less than 0.06
0.06 - 0.2
0.2-0.6
0.6 - 2.0
2.0 - 6.0
6.0 - 20.0
More than 20
C, SiCL, SiC
CL+
CL, SiL
L, Vfsl, SCL
SL, LS
GLS, S and G
G
°Available Water Holding Capacity: the relative amount of water that a soil, from 0-60 inches or to a paralithic or lithic cooled, can hold available for use by plants. Atteded
by such characteristics as soil texture, depth, structure, salts, and organic matter. AWHC modifiers aie site-specilic for the sampled soil profiles. Class criteria is taken from
USDA-SCS, May 1981, Wyoming Soil Interpretation Procedure Guide, pg. 31. Classes are: Low = <6 inches; Moderate = 6.9 inches; High =>9 inches. Determination of AWHC
based on table G (Soil Moisture -Holding Capacty), USDA -Forest Service, Southwestern Region. March 1970.
'Rate of Runoff: This indicates the relative rate that water is removed by flow over the surface of the soil. Classes are defined in the Soil Survey Manual.
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