PERMFILE106005

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15 TYPICAL PEDON DESCRIPTIONS
• Media Type: D
• Archive: No

• BINCO SILTY CLAY LOAM - (12)
Taxonomic Class: Fine, Montmorillonitic, frigid Udorthentic Chromusterts.
Ap 0 - 8" --Dark brown (lOYR 3/3, moist) silty clay loam; strong medium subangular
blocks that part to moderate medium granules;veryfirm,slightlysticky,plastic;
common coarse, many fine, and few medium roots; neutral, pH 7.0; abrupt smooth
boundary.
Bw 8 - 14" -- Dark yellowish brown (lOYR 4/4, moist) silty clay; strong coarse
prismatic structure; extremely firm, sticky, very plastic; common slicken-
sides; organic coatings in root channels; few fine and medium roots; slightly
acid, pH 6.2; gradual smooth boundary.
C 14 - 25" -- Dark yellowish brown (lOYR 4/5, moist) silty clay; strong coarse
prismaticstructure;extremelyfirm,sticky, very plastic;fewfineandmediumroots;
mildly alkaline, pH 7.5; gradual smooth boundary.
Ckl 25 - 34" -- Dark yellowish brown (lOYR 4/5, moist) silty clay loam; massive;
friable,slightlysticky,plastic; softpowderylimepocketsandlimethreads;fefine
roots;stronglyeffervescent;moderatelyalkaline,pH 8.2;gradualsmoothboundary.
Ck234 - 49"--Darkbrown(10YR3/3,moist)siltyclayloam;massive;friable,slightly
sticky, plastic; fewgypsumcrystals and few lime pockets; fewfine roots; strongly
effervescent; moderately alkaline; pH 7.9; gradual smooth boundary.
• Ck349 - 60"--Olive brown(2.5Y4/3,moist)siltyclayloam;massive;firm, sticky,
plastic; strongly effervescent; moderately alkaline, Ph 1.9.
Sampling Location (Typical Pedon): Twentymile Coal Company's proposed Foidel
Creek permit area, Sample Site 11. NW 1/4, SW 1/4, NE 1/4, Section 8, T5N,
R86W, Routt County, Colorado.
Other Sampling Locations: Twentymile Coal Company's proposed Foidel Creek
permit area, composite sample - site #12.
Range in Characteristics: Clay content of the 10 to 40 inch control section
ranges from 35 to 60 percent. Cracks 1 inch or wider occur when soils are
dry. Cracks extend to 20 or more inches.
Drainage and Permeability: Well drained; slow permeability.
Depth to Water Table: Greater than 60 inches on August 4, 1984.
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Ex. 15-8