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Home My WebLink About20170938 Ver 1_Mitigation Plan_Appendix E_20170731Appendix G Swift Creek - Permittee Responsible Mitigation Plan Edgecombe County, North Carolina APPENDIX E HYDRIC SOILS EVALUATION This Page Intentionally Left Blank �P Swift Creek Permittee Responsible Mitigation Site Hydric Soils Investigation Edgecombe County, North Carolina a m e c March 28, 2017 faster wheeler Project Description Amec Foster Wheeler conducted a preliminary soil investigation to determine the approximate limits of drained hydric soils within an existing agriculture field (study area). The purpose of this investigation was to determine the approximate extent of hydric soils that have been drained for previous and ongoing agricultural activities. The study area is in the northeastern portion of the approximately 600 -acre Wilson Parcel located adjacent to the southern side of N.C. Highway 33, northwest of Leggett, North Carolina. Amec Foster Wheeler Licensed Soil Scientists completed this investigation on March 7 and 8, 2017. Methodology The NRCS Soil Survey of Edgecombe County, North Carolina indicated the presence of one hydric soil map unit within the study area. Hydric soils or soils that may contain hydric inclusions mapped in the study area include Roanoke silt loam (Ro). Amec Foster Wheeler advanced hand -auger borings along transects within the study area to determine the approximate limits of potentially hydric soils present. Pin flags were placed along the hydric — non -hydric soil line. The pin flag locations were located with sub- meter GPS technology. The pin flags were removed once located due to ongoing agriculture operations within the study area. Summary of Findings The study area consists of a cultivated agriculture field that is drained by a network of ditches. Seven ditches ranging in depth from three to four feet deep connect to a larger ditch approximately five feet deep in the southern portion of the study area. The ditch network drains the study area to the southwest. Based on field observations and soil profile descriptions, the drained hydric soils within the study area most closely resemble the Roanoke silt loam (Clayey, mixed, thermic Typic Ochraquults) soil series. The hydric soil indicators observed included depleted, low chroma matrices and redoximorphic features including high chroma concentrations. The drained hydric soils present within the study area meet the NRCS hydric soil indicator F3 — Depleted (Gray) Matrix. Based on the preliminary hydric soil delineation, approximately 23.9 acres of drained hydric soils were observed. The soil boring logs are located in Appendix A and the Figures are located in Appendix B. This preliminary soil investigation to determine the approximate limits of drained hydric soils is a planning grade evaluation. This level of evaluation is not suitable for the development of a wetland restoration plan. This Page Intentionally Left Blank APPENDIX A - SOIL BORING LOGS This Page Intentionally Left Blank Preliminary Hydric Soil Investigation { Off/ 'rt§#a Vlf"N {4 Leggett, Edgecombe County, North Carolina Boring Logs 8 -Mar -17 J.Gay, LSS SB -1 Matrix % color % Redox features Location Texture Structure Depth Color % color % Type Location Texture Structure 0-14 10YR 4/2 100 7.5YR 5/4 2 concentration Matrix SL lfsbk 14-25 10YR 5/2 90 10YR 5/6 10 concentration Matrix Coarse SL lfsbk 25-34 10YR 5/1 80 10YR 5/6 20 concentration Matrix Coarse SCL 2msbk 34-36 10YR 5/1 95 10YR 5/4 5 concentration Matrix Coarse SCL lmsbk 43-49 10YR 5/1 70 10YR 5/6 30 concentration Matrix Coarse SCL massive 49-60 10YR 5/1 85 10YR 5/6 5 concentration Matrix Coarse SL lfsbk 44 51 10YR 5/1 95 10YR 5/2 15 mixed matrix Matrix SL lfsbk SB -2 Matrix Redox features Depth Color % color % Type Location Texture Structure 0-12 10YR 4/2 95 10YR 5/6 5 concentration Matrix Coarse SL lfsbk 12-19 10YR 5/2 98 7.5YR 5/4 2 concentration Matrix Coarse SCL lmsbk 19-22 10YR 5/1 95 10YR 5/4 5 concentration Matrix Coarse SL lfsbk 22-32 10YR 5/1 95 1 10YR 5/6 5 concentration Matrix Sc massive 32-33 10YR 5/1 100 1 10YR 5/6 10 1 Matrix Coarse SL undetermined 33-45 1YR 5/1 95 10YR 5/4 5 concentration Matrix Sc massive 45-50 10YR 5/1 88 10YR 5/4 10 concentration Matrix Sc massive 44 51 10YR 5/1 95 lOYR 5/6 2 concentration Matrix SL lfsbk 50-60 10YR 5/1 100 1 Coarse SL lfsbk 8 -Mar -17 J. Witherspoon, LSS SB -3 Matrix Redox features Depth Color % color % Type Location Texture Structure 0-6 2.5Y 3/1 100 L lfsbk 6-14 2.5Y 3/1 100 CL lfsbk 14-30 lOYR 4/1 90 lOYR 5/8 10 concentration Matrix D lmsbk 30-38 10YR 5/2 80 1 10YR 5/6 10 concentration Matrix Sc lmsbk 10YR 4/1 1 10 1 depletion I Matrix 38 44 lOYR 5/1 85 10YR 5/6 15 concentration Matrix Sc lmsbk 44 51 10YR 5/1 95 10YR 5/6 1 5 concentration Matrix SL lfsbk 51-60 10YR 5/2 100 1 LS lfgr Notes surface horizon in hay field. Impacted by harrow and plow activities concentrations are heavier clay concentrations concentrations are same texture as matrix saturated at 43 free water at 55 Notes surface horizon in hay field. Impacted by harrow and plow activities restrictive free water in this horizon. Unable to determine structure concentrations are very faint. Hole filling with water from above horizon 10YR 5/4 concentrations are very faint 10YR 5/6 concentrations are distinct 10% clay pockets in matrix. Same color, massive structure Notes surface horizon in hay field. Impacted by harrow and plow activities saturated at 44 free water at 51 This Page Intentionally Left Blank APPENDIX B - FIGURES This Page Intentionally Left Blank P:\Transportation\Projects\Rail\CSX\Central Carolina Intermodal Facility\GIS\GIS_Working\Palustrine_Mitigation_Site\Mitigation_Site.mxd, User: jason.hightower; Date: 2/7/2017 12:40:08 PM, Checke by: RGH Date: 1/5/17 r amec foster wheeler Hydric Soil Boundary (23.9 Acres) Jurisdictional Wetland (5.7 Acres) Mitigation Site Boundary Note: This figure is for reference only. R " _W 0. t Y r 'i ILI 0 175 350 Feet MmLff "L -i Swift Creek Mitigation Site Edgecombe County, NC PROJECT NO: 643009004.0001 1 DATE: 3/13/2017 P:\Transportation\Projects\Rail\CSX\Central Carolina Intermodal Facility\GIS\GIS_Working\Palustrine_Mitigation_Site\Mitigation_Site.mxd, User: jason.hightower; Date: 2/7/2017 12:40:08 PM, Checke by: RGH Date: 1/5/17