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Permit M-1977-493—Climax Mine Technical Revision 37 (TR-37) <br /> Map Unit: 36OC <br /> Leadville family, sandstone substratum, 40 to 65 percent slopes. <br /> Ecological Land Unit: 360C—subalpine fir and Engelmann spruce on montane and subalpine, <br /> north facing steep mountain slopes. <br /> MAP UNIT SETTINGS <br /> Location: throughout the survey area. <br /> General Landforms/Geomorphology: steep mountain slopes. <br /> Parent material:residuum and colluvium. <br /> Geologic symbol: Pmb, PPm. <br /> Elevation range: 9,000 to 11,800 feet. <br /> Aspect: north. <br /> Climatic zone: montane and subalpine. <br /> Mean annual precipitation: 20 to 40 inches. <br /> Mean annual air temperature: 36°F. to 44°F. <br /> Average annual snowfall: 200 to 400 inches. <br /> COMPOSITION <br /> 85 percent Leadville and similar soils. <br /> Contrasting inclusions <br /> 10 percent Hechtman family on residuum. <br /> 5 percent cliffs and talus. <br /> TYPICAL PROFILES: <br /> Leadville <br /> A representative pedon of this soil occurs in map unit 467D supporting seral lodgepole <br /> pine/grouse whortleberry on a 10 percent northeast facing backslope at 9,782 feet elevation <br /> located in the SW 1/4, NW 1/4, sec. 14, T. 6 S., R. 81 W., in Eagle County, Colorado: <br /> Oi --2.5 to 1.5 inches; undecomposed conifer needles and twigs; abrupt smooth boundary. <br /> Oe -- 1.5 to 0 inches; partially decomposed conifer needles and twigs; abrupt smooth boundary. <br /> Al -- 0 to 1.5 inches; yellowish brown (10YR 4/4) loam, dark yellowish brown (10YR 3/4) crushed <br /> moist; moderate medium platy structure; very friable, slightly sticky, nonplastic; few medium <br /> and common fine roots; few coarse and common fine tubular pores; strongly acid; 5 percent <br /> pebbles; clear smooth boundary. <br /> A2 -- 1.5 to 7 inches; yellowish brown (10YR 5/4) gravelly silt loam, dark yellowish brown (10YR <br /> 4/4) crushed moist; weak medium subangular blocky structure parting to weak medium <br /> granular; very friable, nonsticky, nonplastic; few coarse and common fine and medium roots; <br /> few coarse and common medium interstitial pores; very strongly acid; 15 percent pebbles; <br /> clear smooth boundary. <br /> E1 -- 7 to 15 inches; pink (7.5YR 7/4)very cobbly silt loam, brown (7.5YR 5/4) crushed moist; <br /> moderate medium subangular blocky structure; very friable, nonsticky, nonplastic; few fine <br /> and common medium and coarse roots; few medium and many very fine pores; very strongly <br /> acid; 10 percent pebbles, 25 percent cobbles; clear smooth boundary. <br /> E2 -- 15 to 20 inches; pink (7.5YR 7/4)very cobbly very fine sandy loam, brown to dark brown <br /> (7.5YR 4/4) crushed moist; moderate fine to medium subangular blocky structure; very <br /> friable, nonsticky, nonplastic; few fine to coarse and common medium roots; common fine <br /> Exhibit I —Appendix A I-A-9 March 2024 <br />