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Regional General Permit Notification for Grisenti Farms Gravel Pit Bank Stabilization Project Fremont County,Colorado Corps File No.RGP-37 of uplands and waters of the U.S.and the transition areas between them. Each data point was given a label that corresponds to a location shown on Figure 2 and routine wetland determination forms (Appendix B). The following sections contain information on potential surface water connections of waters in the project area. Streams, Open Water, and Wetlands Tributaries to navigable waters are considered waters of the U.S.and are subject to the Corps' jurisdiction. The Arkansas River is shown on the USGS Florence topographic quadrangle as a perennial stream. The Arkansas River is considered a traditionally navigable water(TNW)and is a jurisdictional water of the U.S. The Arkansas River is approximately 125 feet wide within the project area. During the 2018 site visit, ERO mapped approximately 0.39 acre of stream channel and 0.02 acre of wetlands within the project area(Figure 2). Vegetation One wetland occurs in the project area in a swale above the east bank of the Arkansas River. ERO collected vegetation data at three locations within the project area to determine if hydrophytic vegetation was present(Data point(DP)1 through DP3). The one dominant species within the wetlands at DP1 was reed canarygrass(facultative wetland). Vegetation at DP1 met the dominance test for hydrophytic vegetation. Vegetation at DP2 was dominated by kochia(facultative upland)and vegetation at DP3 was dominated by smooth brome(upland)and meadow fescue(facultative upland). Vegetation at DP2 and DP3 did not meet any of the indicators for hydrophytic vegetation. Soils Soil data were collected from three locations in the project area(Figure 2). Soils at DP1 had matrix colors of 10YR 4/2 and 10YR 3/2 with redox concentrations of 7.5YR 4/6. The hydric soil indicator at DP1 was redox dark surface. Soils at DP2 had a matrix color of 10YR 3/2 and soils at DP3 had a matrix color of 10YR 4/2. Soils at DP2 and DP3 did not meet any of the hydric soil indicators. Hydrology Hydrology indicators at DPI include geomorphic position and a successful FAC-Neutral test. No hydrology indicators were observed at DP2 and DP3. Endangered Species Act Compliance During the 2018 site visit,ERO assessed the project area for potential habitat for threatened, endangered,and candidate species listed under the Endangered Species Act(ESA)of 1973,as amended (16 U.S.C. 1531 et seq.). The Service lists several threatened and endangered species with potential habitat in Fremont County or with potential to be affected by projects in Fremont County(Table 1). The project area does not fall within the Service's habitat or survey guidelines for the majority of the species listed by the Service as potentially being present in Fremont County. ERO Project#t7141 6 12