Laserfiche WebLink
Wetland Delineation Report June, 2015 <br /> South Everett Forest Preserve ©2015 Perteet Inc. <br /> (hydrodynamics). The stream was classified using the water typing criteria outlined in the City of Everett <br /> Municipal Code (Title 19, Chapter 37.160). <br /> Chapter 4. Results <br /> 4.1 Field Investigation <br /> A wetland delineation on the South Everett Forest Preserve was performed on February 25, 2014 by <br /> Perteet biologists. During the delineation, an evaluation of the vegetation, soils, and hydrology was made <br /> along the interface of wetlands and uplands. One wetland was identified on the South Everett Forest <br /> Preserve property (see Figure 4). Wetland boundary points were determined and marked in the field <br /> with orange and black"Wetland Boundary" flagging tape. In addition, Silver Lake Creek was also <br /> identified flowing through the wetland. <br /> Site photos taken during the delineation are included in Appendix A. Wetland delineation data forms <br /> are provided in Appendix B for representative test plot locations in the wetlands and adjacent uplands. <br /> Data entered on the forms documents the vegetation, soils, and hydrology information that aided in the <br /> preliminary wetland determinations under this study. Wetland ratings are included in Appendix C. <br /> 4.2 Wetland <br /> One wetland is located along the eastern property boundary but a portion extends west near 109th <br /> Street SE. This wetland extends offsite to the north so the on-site portion covers approximately 48,469 <br /> square feet. <br /> 4.2.1. Wetland Hydrology <br /> The wetland is a riverine wetland with hydrology that is primarily influenced by Silver Lake Creek. A <br /> narrow extension located near 109th Street SE exhibits depressional wetland conditions but this is <br /> secondary to the overall riverine condition. Signs of hydrology included flowing water, standing water, <br /> and saturated soils. At soil pit SP-I, wetland hydrology was evident in the form of a high water table and <br /> saturation to the surface (Appendix B). <br /> 4.2.2. Wetland Vegetation <br /> The wetland is a palustrine (shrub) and forested wetland (Cowardin et al. 1979) that is dominated by a <br /> tree canopy of western red cedar (Thuja plicata), red alder (Alnus rubra), and Pacific willow (Salix lucida <br /> ssp. Lasiandra). The shrub layer contains salmonberry (Rubus spectabilis), vine maple (Acer circinatum), <br /> hardhack (Spiraea douglasii), and willow saplings. The herbaceous layer consists of reed canarygrass <br /> (Phalaris arundinacea), slough sedge (Carex obnupta), water parsley (Oenanthe sarmentosa), and lady fern <br /> (Athyrium flix-femina). At soil pit SP-I, the dominant species included western red cedar, salmonberry, <br /> reed canarygrass, and lady fern. <br /> 4.2.3. Buffer Vegetation <br /> Upland vegetation adjacent to the wetland consists of Douglas fir (Pseudotsuga menziesii), western <br /> hemlock (Tsuga heterophylla), western red cedar, vine maple, salal (Gaultheria shallon), dull Oregon grape <br /> (Mahonia nervosa), trailing blackberry (Rubus ursinus), sword fern (Polystichum munitum), and deer fern <br /> (Blechum spicant). Invasive species in this upland forest include Himalayan blackberry (Rubus armeniacus), <br /> ivy (Hedera helix), holly (Ilex aquifolium), and yellow archangel (Lamiastrum galeobdolon). At soil pit SP-2, <br /> the dominant species included Douglas fir, western red cedar, vine maple, and sword fern. <br /> Page 8 <br />