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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37)
<br /> The Legault series consists of very shallow and shallow, well drained or somewhat excessively
<br /> drained soils that formed in slope alluvium, colluvium, and residuum from schist, gneiss, and
<br /> granitic rocks. These soils are on mountain slopes, ridges, structural benches, and spurs that
<br /> commonly have north aspects. Slopes range from 5 to 80 percent. Average annual precipitation is
<br /> about 20 inches and mean annual temperature is about 43 degrees F.
<br /> Representative Pedon:.
<br /> A representative pedon of this soil is located in the NW 1/4, SE 1/4, sec. 4, T. 9 S., R. 71 W., in
<br /> Jefferson County, Colorado. Taxonomic Class: sandy-skeletal, mixed, shallow Typic Cryorthents.
<br /> Oi -- 1 to 0 inch; slightly decomposed conifer litter.
<br /> A-- 0 to 2 inches; brown (10YR 5/3)very stony loamy sand, very dark grayish brown (10YR 3/2)
<br /> moist; moderate fine and very fine granular structure; soft, loose, non-sticky, non-plastic; many
<br /> very fine, few fine roots; many fine interstitial pores; 20 percent gravel, 15 percent stone; neutral
<br /> (pH 6.9); clear smooth boundary.
<br /> AC --2 to 11 inches; very pale brown (10YR 7/3) very gravelly loamy sand, brown (10YR 5/3)
<br /> moist; weak medium subangular blocky parting to fine granular structure; soft, loose, non-sticky,
<br /> non--plastic; many medium, common fine roots; common fine and medium interstitial pores; 50
<br /> percent gravel, 5 percent cobble; slightly acid (pH 6.4); gradual smooth boundary.
<br /> C -- 11 to 16 inches; brownish yellow (10YR 6/6) extremely gravelly loamy coarse sand, yellowish
<br /> brown (10YR 5/6) moist; massive; slightly hard, loose, non-sticky, non-plastic; common medium,
<br /> few fine roots; common medium interstitial pores; 60 percent gravel, 5 percent cobble; neutral (pH
<br /> 6.6); gradual wavy boundary.
<br /> Cr-- 16 to 40 inches; soft, weathered granitic bedrock.
<br /> Soil depth to weathered bedrock is 9 to 19 inches. The reaction of the soil is strongly acid to
<br /> neutral.
<br /> The A horizon has hue of 10YR or 7.5YR, value of 4 to 6 dry, and 3 to 5 moist, and chroma of 2
<br /> to 4. The texture of the fine earth fraction is loamy sand or sandy loam. The soil has 20 to 55
<br /> percent rock fragments.
<br /> The AC horizon has hue of 10YR, value of 5 to 7 dry, and 4 or 5 moist, and chroma of 3 to 4. The
<br /> texture of the fine earth fraction is loamy sand or sandy loam. The soil has 35 to 65 percent rock
<br /> fragments.
<br /> The C horizon has hue of 10YR or 7.5YR, value of 5 to 7 dry, and 4 to 6 moist, and chroma of 3
<br /> to 6. The texture of the fine earth fraction is loamy coarse sand or loamy sand. The soil has 50
<br /> to 75 percent rock fragments.
<br /> Leighcan family
<br /> The Leighcan series consists of very deep, well drained soils that formed in till, slope alluvium, or
<br /> colluvium from acid igneous rocks. Leighcan soils are on mountain slopes and have slopes of 0 to
<br /> 70 percent. The mean annual precipitation is about 45 inches, and the mean annual temperature
<br /> is about 32 degrees F.
<br /> Representative Pedon:
<br /> A representative pedon of this soil is located in the SW 1/4, SE 1/4, sec. 32, T. 5 S., R. 76 W., in
<br /> Clear Creek County, Colorado. Taxonomic Class: loamy-skeletal, mixed Dystric Cryochrepts.
<br /> Exhibit I —Appendix A I-A-48 March 2024
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