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• o Map unit descriptions include the site specific percentage of the component <br />series (and percentages for major inclusions) found in each mapping unit and <br />reflect the site specific conditions (ranges, variability, associated competing <br />soils) of the study area. <br />o All map units were correlated with existing SCS soil series, where possible. <br />Series variants were utilized where site-specific soil properties differed <br />slightly from the established soil series. <br />o Definitions and limits for the terms: phase, consociation, complex, variant, <br />similar, and dissimilar were applied as described in the revised Soil Survey <br />Manual, Chapter 5-Map Units (SCS 1980). <br />Furthermore, each map unit was fully described and the following items were also <br />addressed: <br />o slopes (their length if important and percentages) <br />• o physiography type <br />o erosion hazard from wind <br />o erosion hazard from water <br />o surface runoff <br />All mapping units were compared with existing SCS Routt County map units. <br />PCC has maintained a complete and legible field notebook that describes the soil <br />characteristics (in an appropriate method of field notation) for 48 holes that were dug <br />during the 1987 field mapping. This product provides additional site specific information <br />and is valuable for several reasons. It provides survey-area-wide data beyond the <br />standard point specific sampling data. This information is valuable for soil series range <br />of characteristics report discussion, as well as for more specific topsoil suitability <br />evaluations and subsequent topsoil volume calculations based on percent inclusions as well <br />as major map unit components. It also provides a written record of field work that can be <br />utilized in any subsequent field review. The soil observations were sequentially numbered <br />in the field book and plotted on the 1"400' scale photographic base map. <br />• <br />Map units were delineated on the 1"400' scale black and white aerial photo base map (dated <br />5/7/87). <br />9-6-10 Revised 05/16/88 <br />