2024-05-17_REVISION - M1977493 (3)

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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37) Cryochrepts No representative pedon is available. A general description of a Typic Cryochrept is contained below. Al 1 —0 to 2 inches; dark grayish brown (10YR 4/2) cobbly sandy loam, very dark brown (10YR 2/2) moist; weak fine granular structure; slightly hard (dry), very friable (moist), nonsticky and slightly plastic (wet); many fine roots; 25 percent cobbles and stones; slightly acid; abrupt wavy boundary. Al —2 to 14 inches; brown (10YR 5/3) cobbly fine sandy loam, dark brown (10YR 4/3) moist; weak medium subangular blocky structure; friable (moist), slightly sticky and non-plastic (wet); many fine and medium roots; 20 percent gravel and cobbles; medium acid; gradual wavy boundary. B21 14 to 24 inches; pale brown (10YR 6/3) cobbly sandy loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; very friable (moist), slightly sticky and non-plastic (wet); many fine and medium roots; common fine and medium pores; 30 percent cobbles and gravel; medium acid; gradual wavy boundary. B22 24 to 35 inches; light yellowish brown (10YR 6/4) cobbly coarse sandy loam, brown (10YR 5/5) moist; weak medium subangular blocky structure; friable (moist), slightly sticky and slightly plastic (wet); common fine and medium roots; many fine and medium pores; 30 percent cobbles and gravel; medium acid; gradual wavy boundary. B23 35 to 47 inches; light yellowish brown (10YR 6/4) cobbly sandy loam, yellowish brown (10YR 5/5) moist; weak medium subangular blocky structure; friable (moist), slightly sticky and slightly plastic (wet); common fine and medium roots; many fine and medium pores; 30 percent cobbles and gravel; medium acid; gradual wavy boundary. B24 47 to 67 inches; light yellowish brown (10YR 6/4)cobbly sandy loam, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure; friable (moist), slightly sticky and slightly plastic (wet); few fine roots; common fine pores; few thin clay skins in pores and on ped faces; 30 to 40 percent cobbles, gravel and stones; medium acid; clear irregular boundary. C -- 67 to 79 inches; This horizon is about 70 percent partly weathered parent rock and 30 percent fine earth in pockets. SOIL PROPERTIES AND QUALITIES Cryoborolls Effective rooting depth: greater than 60 inches. Natural drainage class: well. Depth to seasonal high water table: greater than 6 feet. Available water capacity: moderate. Permeability: moderate. Runoff.• moderate. Cryochrepts Effective rooting depth: greater than 60 inches. Natural drainage class: somewhat excessively. Available water capacity: low. Permeability: moderately rapid. Exhibit I —Appendix A I-A-41 March 2024