2014-11-21_PERMIT FILE - C1996084 (23)

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Rule 1: Permits • Trag Loam, 3 to 9 percent slopes (map symbol M11D) has 24 to 36 inches of salvageable soil. The texture of the upper horizons is a loam or clay loam. High clay content of the subsoil will limit salvage depth. Fughes Clay Loam, 3 to 9 percent slopes (map symbol C2D) has 48 to 60 inches of salvageable soil. The texture of the upper horizons is generally sandy clay loam or clay loam. A high clay content or excessive gravel may limit the use of some horizons. Louviers-Sarcillo-Trag Complex, 3 to 25 percent slopes (map symbol PjE) has 0 to 36 inches of salvageable soil. Avery shallow topsoil over very cobbly subsoil renders much of this soil unusable for reclamation. However, usable soil from 6 to 36 inches thick is present in scattered locations. Fuera-Dargol-Varner Complex, 3 to 25 percent slopes (map symbol P3E) has 48 to 60 inches of salvageable soil. The texture of the upper horizons is generally sandy clay loam or clay loam. A high clay content may limit the usefulness of some horizons. Saruche-Rombo Complex, 35 to 50 percent slopes (map symbol C3F) has 6 to 36 inches of salvageable soil in areas where slopes are not too steep to prevent salvage. The upper horizons are gravelly loam or gravely clay loam. A shallow depth to bedrock or high gravel or cobble • content limits the depth of useful soil. Louviers-Rombo-Travessilla Complex, 30 to 65 percent slopes (map symbol PjF) generally has no soil which would be usable for reclamation. Limitations are a very shallow topsoil over very cobbly subsoil, shallow depth to bedrock, and steep slopes. Soils Productivity Soil fertility was also examined. The percentage of organic matter in topsoil (A horizon) was greater than 2.0 percent for all but one sample and greater than 1.0 for samples from all horizons. Therefore, nitrogen fertilizer requirements for reclamation are expected to be minimal. Further discussion of present and potential soil productivity is included in the vegetation section of this application. 2.04.10 VEGETATION INFORMATION The general vegetation map is presented as Map 2.04.10-1 at a scale of 1:1,000. Seven vegetation community types were delineated. These include coniferous forest, oak/pinyon pine, grassland, pinyon/juniper woodland, hay meadow, riparian, and mountain shrub. Table 2.04.10-1 presents the premine vegetation acreage by type for Lorencito Canyon Mine. Potential disturbance associated with the surface mine, P3 portal, Rl/R2 portals, R3/R4 portals, Pl/P2 portals, and • PERMR.rev\April2J, 1991 2.04-43 (revised 4/21/97)