2024-05-17_REVISION - M1977493 (3)

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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37) Map Unit: 932D Handran - Eyre families - Rock outcrop complex, 40 to 150 percent slopes. Ecological Land Unit: 932D—grasses, sedges and forbs on alpine, steep to very steep mountain slopes. MAP UNIT SETTINGS Location: alpine areas where sedimentary rocks predominate. General Landforms/Geomorphology: steep to very steep mountain slopes. Parent material:colluvium and residuum. Geologic symbol: Pmb, PPm, TrPs. Elevation range: 11,600 to 13,500 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 40 percent Handran and similar soils. 30 percent Eyre and similar soils. 20 percent Rock outcrop. Contrasting inclusions 10 percent Cryochrepts on convex slopes and near timber line. TYPICAL PROFILES: Handran A representative pedon of this soil occurs on a 58 percent south southwest facing slope at 8,830 feet elevation located in the SW 1/4, NW 1/4, sec. 9, T. 4 S., R. 78 W., in Summit County, Colorado supporting a mountain big sagebrush/Idaho fescue plant association. A-- 0 to 10 inches; (10YR 4/2)stony loam, (10YR 2/2) moist; moderate medium subangular blocky structure parting to weak fine granular; very friable; nonsticky, nonplastic; many fine and very fine and common medium roots; many fine interstitial pores; 40 percent rock fragments; neutral; clear wavy boundary. Bwl 10 to 21 inches; (10YR 6/3) extremely stony loam, (10YR 4/3) moist; moderate fine subangular blocky structure; friable, nonsticky, nonplastic; common fine and very fine and few medium roots; common fine and very fine and few medium roots; few fine tubular and common fine interstitial pores; 60 percent rock fragments; neutral; gradual wavy boundary. Bw2--21 to 41 inches; pale brown (10YR 6/3) extremely stony sandy clay loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; friable, slightly sticky, nonplastic; few fine tubular and common fine interstitial pores; 60 percent rock fragments; slightly acid; gradual wavy boundary. Bw3 --41 to 60 inches; (10YR 6/4) extremely stony coarse sandy clay loam, (10YR 5/4) moist; weak and moderate fine subangular blocky structure; friable, slightly sticky, nonplastic; few very fine and fine roots; many fine interstitial pores; 60 percent rock fragments; neutral. Eyre A representative pedon of this soil occurs on a 75 percent west southwest facing back slope at 9,100 feet elevation located in the SW 1/4, SE 1/4, sec. 23 , T. 4 S., R. 82 W., in Eagle County, Colorado supporting a aspen/Thurber fescue plant association. Exhibit I —Appendix A I-A-37 March 2024