2008-11-26_PERMIT FILE - M2008080 (3)

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Kersey Gravel Wetland Delineation Report Ecological Resource Consultants, Inc. No culverts were noted on the east end of the wetland and no culverts or wetland complexes were noted immediately east of CR 51. At the time of the site visit, Wetland A did not exhibit any indicators of hydrology. For the wetland determination, hydrology was assumed because the wetland is highly influenced by the irrigation ditches and will likely demonstrate signs of hydrology (such as drainage patterns or saturation) later in the growing season. The wetland appears to be hydrologically isolated. Dominant vegetation within Wetland A includes three-square, curly dock and bulrush species; all of which are FACW or OBL species. Soil color within the wetland consists of a black (1 OYR 3/1) to very dark gray (1 OYR 3/2) in the upper 16 inches of the soil profile. A low quantity of mottling was observed within the test pits. Soil mottling colors were on the order of a reddish brown (5YR 3/4). A list of dominant vegetation identified within the wetland is provided in Table 1. Table 1. Identified Hvdrophvtic Vegetation in Wetland A Scientific Name Common Name R g. 5 Indicator Status* T ha lati olia common cattail OBL Rumex cris us curl dock FAC W Scir us s p. bulrush species OBL Scir us americanus three square 0131, OBL = obligate wetland vegetation-occurs an estimated 99% in wetlands FACW = facultative wetland vegetation-occurs an estimated 67%-99% in wetlands FAC = facultative vegetation-equally occurs in non-wetlands as wetlands Wetland B (1.53 acres) Wetland B is classified as a palustrine emergent wetland under the Cowardin et al. 1979 classification system (Appendix A, Photos 6, 7, and 8). The wetland is an approximately ten foot wide swale which begins in the central portion of the Study Area, near the out buildings. The swale flows southeast across the Study Area and through a culvert under CR 51, where it flows into Plumb Ditch, which eventually connects to the South Platte River approximately 1.3 miles east of the Study Area. The swale appears to be manmade due to the linear and uniform shape observed. The banks and bottom of the swale are vegetated and areas of stagnant water were noted along the length of the swale. The area is actively used as part of a grazing pasture. Wetland B is likely influenced by both ground water and irrigation water. At the time of the site visit, hydrologic indicators included drainage patterns in the wetland and saturation within the upper 12 inches of soil throughout the wetland. The east side of Wetland B was inundated, draining through culvert under CR 51 into Plumb Ditch. At times of heavy irrigation, Wetland B likely contains large amounts of flowing water, from the culvert on the west side of the Study Area, as indicated by the wetland's high banks. Dominant vegetation within Wetland B consists of three-square, bulrush species, cattail and salt grass. Soil color within the wetland consists of a black (IOYR 3/1) to very dark gray (IOYR 3/2) in the upper 16 inches of the soil profile. No mottling was observed. A list of dominant vegetation identified within the wetland is provided in Table 2. Table 2. Identified Hvdrophvtic Vegetation in Wetland B Scientific Name Common Name R g. 5 Indicator Status* T ha lati olia common cattail OBL Scir us s p. Bulrush species OBL Scir us americanus threesquare OBL Spartina s p. salt grass FACW OBL = obligate wetland vegetation-occurs an estimated 99% in wetlands FACW = facultative wetland vegetation-occurs an estimated 67%-99% in wetlands 8 114