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ti <br /> 2019 Wetland Delineation Report <br /> Tucson South Sand and Gravel Mine—Brighton, Colorado <br /> Although this feature may contain flowing water during rare seasonal precipitation events, <br /> construction in this feature will not require permitting from the USACE. <br /> 4. Wetlands and Other WOTUS Delineation <br /> Results <br /> 4.1 Wetlands <br /> A total of eight wetlands were delineated in the Project area. Narratives including the dominate <br /> wetland vegetation along with its indicator status, hydric soil indicator, and hydrology indicator for <br /> these delineated wetlands are provided below. Table 3 summarizes the delineated wetlands, the <br /> likely jurisdictional status, and the approximate acreage of each feature. The wetlands are <br /> depicted on Attachment 1, Figure 2. <br /> 4.1.1 Wetland TM-A4-WT <br /> Wetland TM-A4-WT (Wetland A4) is a mix of palustrine emergent and forested wetland classes <br /> located on the eastern portion of the Project. The wetland is within a man-made topographical <br /> depression located adjacent to the river. Upland areas exist between the wetland and the South <br /> Platte River. Vegetation in the wetland plot was dominated by American elm (Ulmus Americana, <br /> FAC) and peachleaf willow (Salix amygdaloides, FACW) in both the tree stratum and shrub <br /> stratum. The herbaceous stratum was dominated by kochia (Bassia scoparia, FACU). Soils in the <br /> wetland sample plot were clays which qualified for the hydric soil indicators Redox Dark Surface <br /> (F6) and Depleted Below Dark Surface (Al 1). The hydrology indicators for the wetland included <br /> Oxidized Rhizospheres on Living Roots (C3) in 10 percent of the soil profile and Geomorphic <br /> Position (D2). Wetland A4 is approximately 0.53 acre. <br /> 4.1.2 Wetland TM-A6-WT <br /> Wetland TM-A6-WT (Wetland A6) is a mix of palustrine emergent and forested wetland classes <br /> located immediately west of Wetland A4. Wetland A6 is part of the same man-made topographical <br /> depression as Wetland A4. Although upland areas surround Wetland A6, Wetlands A4 and A6 <br /> overflow drainage patterns did exist indicating that Wetland A6 may occasionally overflow into <br /> Wetland A4. The western boundary of Wetland A6 is Tucson Street. Vegetation in the wetland <br /> plot was dominated by plains cottonwood (Populus deltoides ssp. monilifera, FAC) and peachleaf <br /> willow in the tree stratum. The dominate vegetation in the herb stratum was narrowleaf cattail <br /> (Typhus angustafolia, OBL). Soils in the wetland sample plot were silty clays which qualified for <br /> the hydric soil indicator Redox Dark Surface (F6). The hydrology indicators included Saturation <br /> (A3), Water Marks (B1), and the FAC-neutral Test (D5). Wetland A6 is approximately 3.56 acres. <br /> 7 <br />