9425 18TH AVE W 2018-01-01 MF Import

CMI Homebuilder's Inc. Wetland Delineation and Wetland classes �vere determined by the U.S. Fish and Wildlife Service's system of wetland classification (Cowardin, et. al. 1979). Vegetation was considered hydrophytic if greater than 50% of the dominant plant species had a wetland indicator status of facultative or wetter (i.e., facultative, facultative wetland, or obligate wetland). Soil on the site was considered hydric if one or morE of the following characteristics were present: • organic soils or soils with an organic surface layer, • matrix chroma just below the A-horizon (or 10 inches, whichever is less) of 1 or less in unmottled soils, or 2 or less if mottles were present, or • gleying immediately below the A-horizon. Indicators of wetland hydrology may include, but are not necessarily limited to: drainage paiterns, drift lines, sediment deposition, watermarks, historic records, visual observation of saturated soils, and visual observation of inundation. An evaluation of the vegetation, soils, and hydrolcgy was made at various iocatians along the interFace of wetiand and upland. Wetland boundary points were then determined from this information and surveyed. Appendix A contains data sheets prepared for representative locations in both the uplands and wetlands. These data shee?s document the vegetation, soils, and hydrology information ihat aided in the wetiand boundary delineation. 4.0 RESULTS 4.1 Analysis of Existing Information National Wetland Inventory (NWI) maps developed by the U.S. Fish and WildliFe Service (USFWS) do not indicate thai any wetlands are located on the site (Figure 2). The City of EveretYs i8t6 Avenue Wetland Inventory forLocal lmprovement District does, however, indicate that a north-south tending wetland is located through the west-central portion of the site. Since these maps are only generai inventories, actual field delineation was necessary to ensure that all wetlands were identified. The Natural Resources Conservation Service (NRCS), formerly the Soil Conservation Service (SCS), has mapped the entire site as Aldenr�ood — Urban land compiex, 2 to 8 percent slrpes (Figure 3). Although this mapping ur.it is no; listed as hydric by the NRCS, it may have hydric soil inclusions. 4.2 Analysis of Field Conditions One wetland (Wetland A) was identified and delineated throughout the west-central portion of the project site (Sheet W1.0). The wetland consists primarily of a broad topographic swale that extends off-site both to the north and south, and is associated with a small drainage that flows south through the wetland. The northern portion of the wetland has been historically filled and currently consists of an excavated ditch separated from the main portion of the wetland by a culvert under an existing old driveway. The total on-site portion of the wetland is about 1.13 acres in size. Vegetation within the wetland consists of a mixture of palustrine deciduous forested and palustrine scrub/shrub companents. Dominant plant species include red alder (Alnus rubra), 20 Ma�� 2003 364C-MitR p14(20May03). doc s, LLC Page2