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pads (Map 1S 18 Right Bleeder Shaft and Map 2S Future Intake Shaft). Two soil cores (#2 & #9) were placed <br />within the previously delineated Fish Creek AVF at locations that best represent the variable conditions within the <br />AVF. Soil cores #2 and #9 were excavated to the groundwater table. The remaining upland soil cores were <br />excavated to a lithic contact or parent material and did not encounter any groundwater. <br />Soil Descriptions: <br />Each soil core was described by horizon following accepted United States Department of Agriculture Natural <br />Resource Conservation Service (MRCS) soil survey procedures for the following parameters: horizon depth; field <br />texture; Munsell color (matrix and mottles); root presence and depth; soil structure; and depth of ground water <br />table. Additional soil descriptions were recorded as needed. Photographs were taken of each soil core after <br />characterization. Major soil horizons are marked with orange markers along a tape in each photograph. Field soil <br />descriptions for each soil core are contained in Exhibit 2, Appendix 1. Photographs of the soil cores are contained <br />in Exhibit 2, Appendix 2. NRCS soil series descriptions of the potentially affected soils are contained in Exhibit 2, <br />Appendix 3. <br />Soil Mapping & Taxonomy <br />Preliminary soil maps from the unpublished NRCS Soil Survey for Routt County were reviewed prior to locating <br />soil mapping unit boundaries for the study area. Field descriptions from each of the 12 soil cores and additional <br />non-characterized cores were used to determine soil map unit boundaries (Maps 1 S & 2S) and soil taxonomy to the <br />soil series or family level. Preliminary NRCS map unit descriptions of the Slocum loam, Winevad-Splitro <br />Complex, Clayburn loam, Aaberg clay and Binco silty clay loam and their known inclusions were used to <br />determine the affected soil series (Exhibit 2, Appendix 3). As with all flood plains in this area, flooding and the <br />deposition and erosion of material may be a frequent occurrence (100 year precipitation event). Frequent flooding, <br />channel movement, erosion and deposition have resulted in highly variable soil profiles within the previously <br />mapped AVF. <br />Results <br />The soil description field forms and photographs for each characterized soil core are contained in Exhibit 2, <br />Appendix 1 and Appendix 2 respectively. The primary soil parameters including bottom depth of rooting, depth to <br />the top of mottling and depth to surface of the groundwater table are summarized in Table 1. NRCS soil series <br />descriptions are contained in Exhibit 2, Appendix 3. <br />Soil core #1 was characterized as a Winevada and soil cores # 3 and #4 as Splitro series within the Winevada- <br />Splitro complex, 3-25 percent slopes, map unit X8D. Soil core #2 was characterized as a Cumulic Cryaquoll and <br />soil core #9 was characterized as a Menbar series and both were mapped as inclusions within the Slocum loam <br />variant, 0-5 percent slopes, map unit 56A. Soil cores #5 and 6 were characterized as within the Clayburn series, 3- <br />25 percent slopes, map units 68C and 68D. Soil cores #7 and 8 were mapped as a Aaberg silty clay, 25-65% <br />slopes, map unit 35F. In Section 17, soil cores #1Q, 11 and 12 were located within the Binco silty clay loam, 3-25 <br />percent slopes, map units C10 and D10. A narrow inclusion of Cumulic Cryaquoll soil was observed in the small <br />drainage channel bisecting the ventilation pad area in Section 17 (Map 2S). <br />TR 04-44 2.04-50.1 06/07/04 <br />