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4-26 4.4 SOILS ASSESSMENT • 4.4.1 Methodology This soil assessment was conducted by Western Resource Development Corporation and their subcontractor, James P. Walsh and Associates, Inc., for Salt Creek Mining Company's proposed permit revision to Munger Mine Permit, No. C-020-81. The mine is located in Gar- field County, Colorado. The survey was conducted to assist Salt Creek in obtaining necessary environmental permits and assisting in the design, construction and reclamation phases of the project. The soil assessment consisted of four phases: ° Field mapping ° Site-specific soil description and sampling ° Laboratory soil analyses ° Interpretation and reporting Field mapping was conducted during several visits made summer of • 1980 through early 1982. The mapping was based on the manuscript Soil Conservation Service (SCS) soil survey for Garfield County (unpublished). Mapping was done on topographic maps at scales of 1" = 200' to 1" = 500', and aerial photography with stereo coverage. Map units were designed specifically for the site. The SCS mapping was refined considerably and mapping within the permit area approximates an Order I or very detailed Order II survey (Figure 4.4-1S). A site-specific soil description and sampling program was conducted over the same two year period. Twenty-one backhoe pits were exca- vated in or adjacent to the proposed permit area. Soil pedons in the addendum area were described in detail according to the stan- dards of the National Cooperative Soil Survey (USDA Soil Survey Staff 1951, USDA SCS 1975) and descriptions are included in Appen- dix Es. Descriptions for pedons at Munger or McClane Canyon Mines are included in "Soils Assessment - Munger Canyon Mine" (C-020-81), • and "Soils Assessment - McClane Canyon Mine" (C-009-81), (WRD 1980a; 1980b). At each pedon, soils were sampled by horizon for laboratory analysis.