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Baseline Technical Report <br /> ARCADIS Report for Soils and Biological <br /> Resources, MLE2 Project Area <br /> type. However, this soil unit is not found within the survey area. Soils in this <br /> association are formed from colluvium or slope alluvium formed from volcanic <br /> breccias and are very to extremely gravelly loam and well drained. Seitz series soils <br /> are deeper than Bushpark series soils and have a thin upper horizon composed of <br /> decomposed organic material. The small area mapped as BW by NRCS was <br /> previously mapped solely as Seitz series soils (ARCADIS 2007). <br /> 2.1.2 CQ.Adderton-Rosane taxadjunct complex, 0 to 6 percent slopes <br /> These soils are hydric or partially-hydric soils that occur on grassy stream terraces, <br /> toe slopes, and floodplains in the Cresson Project area. Approximately 10 acres of <br /> these soils are present within the survey area in Section 17 (2 percent of the total <br /> survey area). Adderton series soils are deep, loamy, and well drained, whereas the <br /> Rosan series soils are shallower loams and are poorly drained. Within the survey <br /> area, Rosan series soils were observed to contain buried organic horizons with <br /> abundant wood fragments. Both soil unit components are derived from alluvium. <br /> Rosan series soils replace the Cryaquolls included in the previous CQ soil map unit <br /> (ARCADIS 2007). <br /> 2.1.3 EB. Quander-Bushpark very gravelly loams, 5 to 40 percent slopes <br /> These soils are found on mountainsides and face terraces in association with the <br /> natural and disturbed grassland vegetation community types. Both components are <br /> derived from colluvium and residuum composed of breccias and tuff, are very to <br /> extremely gravelly loams and clay loams, and are well drained. Both series are <br /> characterized by thick subsoil composed of angular cobble-sized rock fragments, <br /> often with little soil between fragments. Inter-fragment soil is more abundant where <br /> soils formed from colluvium than as residual soils. Bushpark series soils are <br /> shallower and found on steeper slopes. This extensive soil unit comprises <br /> approximately 43 percent of the survey area (183 acres). Quander series soils <br /> replace the Ess series soils included in the previous EB soil map unit (ARCADIS <br /> 2007). Quander series soils were previously included in the Quander-Varden <br /> complex soil unit (PF), which has been discontinued for consistency with NRCS <br /> mapping. In addition, significant areas in the northern portion of the project area <br /> categorized as Rogert series soils in 2007 are now mapped as the EB soil unit. <br /> 2.1.4 OR. Disturbed land, mine areas, overburden storage areas, mine complex <br /> Areas that were historically mined or otherwise altered by human activities are <br /> classified as disturbed soils. Surface disturbance was identified from 2010 aerial <br /> photography and field observations. Differences in vegetation were also used in <br /> CCV Baseline Soils Biology Resource Report(11-17-11).doc 7 <br />