2014-06-26_PERMIT FILE - M2014027 (2)

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In the Impact Environmental Consultants, Ltd. survey, locations of soil series covering greater than one acre were delineated and their characteristics, as described by the SCS, verified. A hydraulic auger was used to sample soils when possible and a hand shovel was used to sample less accessible sites. Ten samples were taken at sites within the permit area (see Exhibit B—Soil Map for locations) and were sent to the Colorado State University Soil Testing Laboratory at Fort Collins for analysis. Impact Environmental Consultants', Ltd. Survey led to identification of two additional soil types: Seitz very stony loam and the Comodore-Rock Outcrop complex. Their test program results otherwise confirmed the SCS observations. The soil mapping units presented in Exhibit B—Soil Map reflect the Impact Environmental Consultants, Ltd. revisions to SCS information found during this on-sight survey. Detailed descriptions of the soils based on both SCS and Impact Environmental Consultants, Ltd. Data follow. JODERO LOAM This soil mapping unit is formed in alluvium of mixed sources, and is found in narrow valley bottoms of zero to three percent slopes. It is a deep soil, easily reseeded in reclamation operations. It is an end-member of the Jodero-Lolo complex soil series described in the next paragraphs. JODERO-LOLO COMPLEX This mapping unit consists of deep, well-drained soils developed on nearly level to moderately sloping (zero to 65 percent grade) low terraces adjacent to streams; elevations range from 8,000 to 9,000 feet. They formed in alluvium from mixed sources. The Jodero soil makes up about 45 percent of the mapping unit, and Lolo soils make up about 35 percent. Jodero soils differ from Lobo soils by having less than 15 percent rock fragments, and by having an irregular decrease of organic matter with increase of depth. Areas of very gravelly sand or very cobbly sand make up about 20 percent of the mapping unit. Typically, the Jodero soil has dark loam surface layer, about 24 inches thick. The underlying material is grayish brown loam, stratified with thin layers of grayish brown sandy loam or loamy sand. Below 48 inches, there may be layers of sandy clay loam or loam extending to 60 inches or more. Permeability is moderate. The effective rooting depth is 60 inches or more, and available water capacity is high. Surface runoff is slow and erosion hazard is slight. The Lolo soil typically has a dark grayish brown, gravelly sandy loam surface layer about 25 inches thick. The subsoil layer is yellowish brown, very cobbly sandy loam about 12 inches thick. The substratum is yellowish brown, extremely cobbly sandy loam that extends to 60 inches or more.