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4.6.2 Classification <br /> Under the Cowardin Classification System for Wetlands and Deepwater Habitats (Cowardin et <br /> al., 1979), Wetland F is in the Palustrine System, Emergent Persistent Class. <br /> 4.6.3 Vegetation <br /> Wetland F is dominated by Nebraska sedge (Carex nebroscensis) in the wettest areas, with <br /> saltmeadow rush, saltgrass, Baltic rush (Juncus arcticus ssp. ater), and clustered field sedge <br /> (Carex praegrocilis) in the drier areas. Other common species at the margins include <br /> quackgrass, teasel, intermediate wheatgrass, and prickly lettuce (Lactuca serriola). <br /> 4.6.4 Hydrology <br /> This slough is seasonally saturated by the high groundwater table associated with the alluvial <br /> aquifer of the Big Thompson River. There was shallow standing water at the time of the <br /> delineation due to recent heavy rains. <br /> 4.6.5 Soils <br /> Pit 9 was used to define the upland limits of Wetland F. This pit was dug in a drier part of the <br /> slough that lacked hydrophytic vegetation, in an area dominated by quackgrass and <br /> intermediate wheatgrass. However, the soil was hydric, with a redox dark surface (F6) and <br /> oxidized rhizospheres on living roots. <br /> 4.7 Wetland G <br /> 4.7.1 Location <br /> Wetland G is located in a poorly-defined swale just west of the Ditch Wetland. Wetland G <br /> measures 1,590 square feet (0.04 acre) (Photo 14). <br /> 4.7.2 Classification <br /> Under the Cowardin Classification System for Wetlands and Deepwater Habitats (Cowardin et <br /> al., 1979), Wetland G is in the Palustrine System, Emergent Persistent Class. <br /> 4.7.3 Vegetation <br /> Wetland G is dominated by reed canarygrass, and was heavily grazed at the time of the <br /> delineation. Other common species include quackgrass, fowl bluegrass (Poa palustris), <br /> meadow fescue, Canada thistle, and intermediate wheatgrass. <br /> 4.7.4 Hydrology <br /> The Swale containing Wetland G appears to be an old, abandoned river channel that is <br /> influenced by the seasonally high groundwater table near the river. <br /> 4.7.5 Soils <br /> Pits 4 and 5 were used to define the limits of Wetland G. Pit 4 is inside the wetland boundary <br /> and had hydric soil with a redox dark surface (F6) and oxidized rhizospheres on living roots <br /> (Photo 14). Pit 5 also had hydric soil, but was not dominated by hydrophytes and is outside <br /> the wetland boundary (Photo 15). <br /> 5 <br />