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4 ~ 42 <br />• Permeability of the disturbed soil vanes from moderately low to high depending on <br />compaction. Available water capacity is moderate to moderately low. Effective rooting depth <br />varies with age of fill material. Runoff is moderate to very high and the erosion hazard for water <br />is moderate to very severe Increasing with steepness of slope). Wind erosion hazard is <br />moderate. <br />The map unit is mainly used for mining activities, including roads, portals, and facilities. <br />The present plant community is mainly summer•cypress, crested wheat grass, and some <br />rabbit brush and lupines. <br />Two grab samples were taken from disturbed areas. These samples were described and <br />analyzed with the other samples. The samples are representative of the fill material in the <br />sample point areas. <br />GRAB SAMPLE MCL <br />The soil was sampled at the McClane Canyon Mine at the portal area on a 30 to 35 percent <br />slope about 2,470 feet west and 1,855 feet south of the northeast comer of Section 21, T 7 S <br />• R 102 W at an elevation of 5,672 feet. It is fill derived from colluvium (of sandstone origin) and <br />some road gravels. <br />AC 0 to 6 inches; very cobbly and stony clay loam; 40 percent cobbles and gravels, 10 <br />to 15 percent stones; some coal fragments throughout; some hydromulch on <br />surface; pH 7.4. <br />GRAB SAMPLE MC 2 <br />This soil was sampled at the McClane Canyon Mine near the mouth of the canyon and the <br />equipment storage area about 1,420 feet east and 2,280 feet south of the northeast comer of <br />Section 21, T 7 S R 120 W, on a 0 to 3 percent slope at an elevation of 5,470 feet. It is fill <br />derived from alluvium some road gravels. <br />AC 0 to 4 inches; gravelly and cobbly sandy clay loam; 20 percent cobbles and gravels; <br />some coal wash fragments throughout; pH 7.8. <br />C~ <br />J <br />A~ Volume 1 429-96 <br />