PERMFILE61423

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 9/14/2005
• Section_Exhibit Name: Exhibit 16e 6 Main North Intake Shaft Soils Investigation
• Media Type: D
• Archive: No

Fish Creek Soi] Investigation
APPENDIX 3
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CLAYBURN SERIES
The Clayburn series consists of very deep, well drained soils that formed in glacial drift,
colluvium, or alluvium derived mainly from shale, sandstone, and andesite, with some basalt.
Claybum soils are on plateaus, hills, and mountain slopes. Slopes range from 2 to 65 percent.
Mean annual precipitation is about 30 inches and the mean annual temperature is about 40
degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Pachic Argicryolls
TYPICAL PEDON: Claybum loam in rangeland. (Colors are for dry soil unless otherwise
noted.)
Al--0 to 2 inches; very dark grayish brown {lOYR 3/2) sandy clay loam, very dark brown {lOYR
2/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many fine
and few medium roots; slightly acid (pH 6.2); abrupt wavy boundary. (1 to 4 inches thick)
A2--2 to l2 inches; very dark grayish brown (1 OYR 312) loam, very dazk brown (1 OYR 2/2)
moist; weak medium granular structure; slightly hard, friable, nonsticky and nonplastic; many
fine and few medium roots; many fine pores; slightly acid (pH 6.4); cleaz wary boundary. (6 to
12 inches thick)
A3--12 to l8 inches; dazk grayish brown (lOYR 4/2) loam, very dark brown (2OYR 2/2) moist;
weak fine subangulaz blocky structure parting to moderate medium granular; slightly hard,
friable, slightly sticky and slightly plastic; many fine and medium roots; many fine pores;
slightly acid (pH 6,4); abrupt irregular boundary. (3 to 12 inches thick)
BA-18 to 24 inches; brown (lOYR 4/3) loam, dazk brown (1 OYR 3/3) moist; weak medium
subangular blocky structure parting to fine subangular blocky; hard, friable, sticky and plastic;
many fine and few medium roots; common fine pores; slightly acid (pH 6.3); cleaz wavy
boundary. (3 to 6 inches thick)
Bt1--24 to 36 inches; brown (lOYR 5/3) sandy clay loam, dark brown (1 OYR 3/3) moist; weak
coazse subangulaz blocky structure parting to moderate fine blocky; hard, firm, very sticky and
very plastic; many fine roots; few fine pores; moderately thick continuous clay films; slightly
acid (pH 6.2); cleaz wavy boundary.
Bt2--36 to 41 inches; brown (lOYR 5/3) sandy clay loam, dark brown (lOYR 3/3) moist; weak
coarse subangular blocky structure parting to moderate fine blocky; hard, firm, sticky and
plastic; many fine roots; few fine pores; thin, patchy clay films; slightly acid (pH 6.2); clear
wavy boundary. (combined thickness of the Bt horizons is l5 to 35 inches)
Habitat Management, Inc. A3-5 01/06/04