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AERC West Farm Pit Expansion Project Site <br /> Aquatic Resource Delineation Report <br /> and wolfberry (Symphoricarpos occidentolis). The herbaceous stratum is strongly influenced by surrounding <br /> upland Great Plains grasslands and often contains mid-and tallgrass species. <br /> 4.2 AQUATIC RESOURCES <br /> Delineated aquatic resources were classified according to physical and biological characteristics using the <br /> Classification of Wetlands and Deepwater Habitats of the United States(Cowardin Classification System)(Cowardin <br /> et al. 1979). Within the survey area, wetland habitat types were classified based on field evaluation.The wetland <br /> habitats within the survey area were classified using the Cowardin Classification System and are summarized below <br /> in Table 1. <br /> Table 1. Summary of Aquatic Resources Delineated within the survey area. <br /> Aquatic Classification Acres Linear <br /> Resource 'Cowardin Location (lat/long) Feet <br /> Name <br /> A R4SBCx 38.0971° N, 102.5998-W 2.45 5,717.46 <br /> B PEM1A 38.1028° N, 102.5742-W 7.49 -- <br /> C R4SBCx 38.0945° N, 102.5578-W 12.50 5,331.62 <br /> D PEM2C 38.0975 - N, 102.5653-W 5.31 -- <br /> E R2UBGx 38.0931° N, 102.5568°W 8.95 11,743 <br /> TOTAL <br /> Notes: <br /> 'Habitat Type based on Cowardin et al. 1979. <br /> A total of 36.70 acres of aquatic resources were delineated by ERC within the survey area.A description of aquatic <br /> resource habitat types is provided below. The Aquatic Resource Delineation Maps are provided in Appendix A. <br /> Wetland Determination data sheets are provided in Appendix B. <br /> AQUATIC RESOURCE A AND C(2.45& 12.5 ACRES/5,717.46&5,331.62 FEET) <br /> Aquatic Resources A and C are comprised of a Riverine Intermittent Streambed Seasonally Flooded Excavated <br /> (R4SBCx) irrigation ditch situated within a topographic drainage in the central portions of the survey area. The <br /> topographic drainage flows to the east in the survey area and within the active mine area. It terminates in the <br /> central portion of the survey area in a large retention pond. R4SBCx irrigation ditch habitat in Aquatic Resources A <br /> and C is defined by OHWM indicators including wetland boundaries following a break in the slope and changes in <br /> vegetation and soil characteristics. Hydrology within Aquatic Resource A and C is supported by a valve to the east <br /> within the town of Lamar that can divert surface water from the Lamar Canal.Surface water flow was not observed <br /> at the time of the delineation.As described in Section 4.3, Aquatic Resource A can flow directly into the Arkansas <br /> River 0.86 miles away to the north if the valves are turned (See Figure 3). <br /> Overall,the vegetation community within Aquatic Resource A and C is very sparse.Vegetation along the fringes of <br /> the aquatic resources are dominated by weedy species such as Russian thistle, prickly lettuce,curly dock, and field <br /> bindweed.The dominant species within the aquatic resources consist of hydrophytic species(FAC-FACW). <br /> 6 <br />