2024-05-17_REVISION - M1977493 (3)

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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37) Oel --4 to 11.5 inches; dark reddish brown (5YR 2/2) and very dark gray(5YR 3/1) rubbed moist; extremely acid (pH 4.1); gradual smooth boundary. Oe2 -- 11.5 to 28 inches; very dark brown (10YR 2/2) and very dark grayish brown (10YR 3/2) rubbed moist; extremely acid (pH 4.1); gradual smooth boundary. Oe3 --28 to 32 inches; very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) rubbed moist; extremely acid (pH 4.3); gradual smooth boundary. Cgl -- 32 to 34 inches; very dark gray (5Y 3/1)and very dark gray (5Y3/1) rubbed moist silt; massive; very hard, firm, slightly sticky, nonplastic; few medium and many very fine and fine roots; common fine interstitial pores; extremely acid (pH 4.2); clear smooth boundary. Cg2 -- 34 to 39 inches; light gray to gray(5Y6/1) and very dark gray (5Y6/1) rubbed moist very gravelly coarse sandy loam and loamy coarse sand; massive; hard, firm, nonsticky, nonplastic; common fine and medium roots; common fine interstitial pores; extremely acid (pH 4.2); 35 percent pebbles; gradual smooth boundary. Cg3 -- 39 to 40 inches; greenish gray (5GY 5/1) and greenish gray )5GY 5/1) rubbed moist very gravelly sandy loam and loamy sand; massive; hard, firm, nonsticky, nonplastic; few fine and medium roots; common fine interstitial pores; extremely acid (pH 4.3); 40 percent pebbles. Cryoborolls Depth Class: Deep Drainage class: Well drained Permeability: Moderate Landform: Mountains and hills Position on the Landform: Side slopes, benches, ridges Parent material: Colluvium weathered from mixed rock sources Slope range: 10 to 70 percent Associated soils: Taxonomic class: Fine-silty, mixed Typic Cryoborolls Reference Pedon: A representative pedon of this soil occurs in map unit 546C supporting Thurber fescue, ligusticum, American vetch community on a 48 percent south southwest facing slope at 10,850 feet elevation located in SE 1/4, SW 1/4, sec. 22, T. 11 S., R. 87 W., in Gunnison County, Colorado: Al -- 0 to 2 inches; grayish brown (10YR 5/2) channery silt loam, very dark grayish brown (10YR 3/2) moist; weak coarse platy structure parting to moderate fine and medium granular; very friable, nonsticky, nonplastic; common very fine, few fine and medium roots; many fine and medium interstitial pores; 20 percent flat siltstone rock fragments; slightly acid; clear smooth boundary. A2 --2 to 12 inches; brown (10YR 5/3)silt loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; very friable, slightly sticky, nonplastic; many very fine and common fine and medium roots; common fine and medium interstitial pores; 10 percent flat siltstone rock fragments; neutral; gradual smooth boundary. E -- 12 to 20 inches; pale brown (10YR 6/3)silt loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; very friable, slightly sticky, nonplastic; common fine and Exhibit I —Appendix A I-A-58 March 2024