2024-05-17_REVISION - M1977493 ‎(3)‎

• Permit No: M1977493
• IBM Index Class Name: Revision
• Doc Date: 5/17/2024
• Doc Name: Exhibit I - Soil Information
• From: Climax
• To: DRMS
• Type & Sequence: TR37
• Email Name: TJ1
• Media Type: D
• Archive: No

Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37)
and medium roots; many medium interstitial, few fine tubular pores; 25 percent gravel, 15
percent cobble, 30 percent stone; strongly acid (pH 5.4); clear wavy boundary.
C -- 50 to 65 inches; light olive brown (2.5Y 5/4) extremely stony loamy sand; massive; soft, very
friable, non-sticky, non-plastic; few fine roots; many fine, medium, and coarse interstitial
pores; 15 percent gravel, 15 percent cobble, 30 percent stone; medium acid (pH 5.8).
Soil depth to bedrock is greater than 40 inches. The reaction of the soil is very strongly
acid to slightly acid.
The A horizon has hue of 10YR or 7.5YR, value of 5 to 7 dry, and 3 or 4 moist, and
chroma of 2 to 4. The texture of the fine earth fraction is loam or sandy loam. The soil
has 15 to 65 percent rock fragments.
The E horizon has hue of 10YR, value of 5 to 7 dry, and 4 or 5 moist, and chroma of 3.
The texture of the fine earth fraction is sandy loam or loam. The soil has 25 to 65 percent
rock fragments.
The Bw horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, and 4 or 5 moist, and
chroma of 4 to 6. The texture of the fine earth fraction is sandy loam or loam. The soil
has 35 to 75 percent rock fragments.
The C horizon has hue of 7.5YR to 2.5Y, value of 5 to 7 dry, and 4 to 6 moist, and
chroma of 4 to 6. The texture of the fine earth fraction is loamy sand, sandy loam, or
loam. The soil has 45 to 85 percent rock fragments.
SOIL PROPERTIES AND QUALITIES
Moran
Landform:
Parent Material:
Effective rooting depth: greater than 20 inches.
Natural drainage class: somewhat excessively.
Depth to seasonal high water table: greater than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: moderate.
Rock outcrop
Landform:
Parent Material:
Teewinot
Landform:
Parent Material:
Effective rooting depth: less than 20 inches.
Natural drainage class: well.
Depth to seasonal high water table: greater than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: rapid.
VEGETATION
Potential natural communities:
Moran: kobresia/Ross' avens-curly sedge (Koury/Gerot-Caru) typical site and tufted
hairgrass/Ross' avens (Dece/Gerot) moist site and kobresia/alpine clover (Koury/Trda2)
exposed site.
Teewinot: kobresia/Ross' avens-curly sedge (Koury/Gerot-Caru) and kobresia/alpine clover
(Komy/Trda2) and Ross' avens/drawf clover(Gerot/Trna2).
Exhibit I —Appendix A I-A-22 March 2024