2024-05-17_REVISION - M1977493 (3)

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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37) Map Unit: 933B Cryoborolls -Cryochrepts complex, 0 to 40 percent slopes. Ecological Land Unit: 93313—willows, grasses, sedges and forbs on alpine, valleys. MAP UNIT SETTINGS Location: alpine areas where sedimentary rocks predominate. Landform: valleys. Parent material:glacial till and valley fill. Geologic symbol: Pmb, PPm, TrPs. Elevation range: 11,600 to 13,000 feet. Aspect: all. Climatic zone: alpine. Mean annual precipitation: 30 to 50 inches. Mean annual air temperature: 34°F. to 38°F. Average annual snowfall: 300 to 500 inches. COMPOSITION 45 percent Cryoborolls and similar soils. 40 percent Cryochrepts and similar soils. Contrasting inclusions 10 percent cirque - ice scoured bedrock, cliffs and talus 5 percent wet soil on seeps and ponded drainages. TYPICAL PROFILES: Cryoborolls A representative pedon of this soil occurs 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 supporting a Thurber fescue, ligusticum, American vetch community. 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 very fine and few medium roots; common fine and medium interstitial pores; 10 percent flat siltstone rock fragments; slightly acid; clear wavy boundary. Bw--20 to 47 inches; pale brown (10YR 6/3) channery silt loam, dark grayish brown (2.5Y 4/2) moist; moderate medium subangular blocky structure; very friable, slightly sticky, nonplastic; few fine, very fine and medium roots; common fine and medium interstitial pores; 15 percent flat siltstone rock fragments; neutral; clear smooth boundary. C --47 to 60 inches; grayish brown (2.5Y 5/2) channery silt loam, dark grayish brown (2.5Y 4/2) moist; massive; friable, nonsticky, nonplastic; 25 percent flat siltstone rock fragments; neutral. Exhibit I —Appendix A I-A-40 March 2024