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• A total of seven major soils and two soil groupings, as well as Reclaimed Land, mapped in
<br />twenty -one map units, are present on the proposed surface - affected areas and buffer zone
<br />located within or immediately adjacent to the Seneca II Mine permit area. Soils in these
<br />areas include Routt silty clay loam (Map Units 2VD and 2VF), Winevada sandy loam (Map
<br />Units 53F, XBD, and X8F), Splitro silt loam (Map Units X8D and X8F), Binco clay (Map Unit
<br />10D and 10E), Coutis loam (Map Units 34C, 34E, and 34F), Aaberg silty clay (Map Units
<br />35D and 35E), Skylick loam (Map Units 66C, 66D, and 66E), Cryoborolls (Map Unit 99),
<br />Alluvial lands undifferentiated (Map Unit AW), and Reclaimed Land (Map Unit REC).
<br />Several of these soils have been recently recorrelated by NRCS to other soil names
<br />(Peacock, 2009) but the original names are retained here because they have been
<br />previously described and sampled by these names in the original and subsequent
<br />additions to both the Seneca II Mine and Foidel Creek Mine soils baseline studies.
<br />Recent soil name changes include Impass for Binco, Phippsberg for Aaberg, Foidel for
<br />Skylick, Rabbitears for Clayburn, Lintim for Cochetopa, Routtskin for Buckskin, Dresher for
<br />Spicerton Variant, and Venable for Alluvial lands, undifferentiated. NRCS now thinks the
<br />average annual precipitation regime of the mapped areas previously containing Binco,
<br />Aaberg, Skylick, Clayburn, Cochetopa, Drersher, and Buckskin is 18 to 26 inches rather
<br />than 9 to 12 inches, or 12 to 18 inches as originally thought. The soil moisture regime was
<br />changed from "ustic aridic" to "typic ustic" thereby necessitating the soil name changes.
<br />The new soil names are used in Tables 1 and 2 which present current NRCS soils
<br />• information for the non - affected areas.
<br />Five of these original soils ( Routt, Binco, Aaberg, Winevada, and Skylick) are located in
<br />areas needing additional detailed Order 1 -2 mapping, and these soils were fully described
<br />and sampled at representative sites as part of the current soil survey. This additional soils
<br />information is presented in map unit descriptions in Section 3.3.1 below.
<br />An additional fifteen soils are mapped in twenty -one map units in the southern portion of
<br />the study area containing the potential transportation corridor and buffer zone. These soils
<br />are listed in a separate section of Table 3 and include Tonks loam (Map Unit 1), Outlet -
<br />Slocum taxajunct complex (Map Unit 2), Buckskin loam (Map Units 2C and 2E), Unnamed -
<br />Adel variant complex (Map Unit 3), Aaberg -Waybe silty clay loams (Map Unit X417), Abor-
<br />Moyerson association (Map Unit X10F), Cochetopa loam (Map Units 50C and 50E),
<br />Clayburn loam (Map Unit 68C), Ustic Torriorthents -Rock Outcrop association (Map Unit
<br />101), and Ustorthents, frig id- Cryoborolls (Map Unit 103). Mined Land, now reclaimed, was
<br />also mapped.
<br />As stated in the Methodology section, proposed surface - affected areas that are within
<br />currently permitted areas (Seneca II and Foidel Creek Mines) do not need additional, more
<br />detailed soils mapping and soil sampling. This is because the permit areas have already
<br />been mapped and sampled to the detailed Order 1, 1 -2, or 2 levels of intensity (Seneca II
<br />Mine, 1997; Foidel Creek Mine, 1999) as required by the state guidelines. Therefore, the
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