8925 AIRPORT RD MUKILTEO SCHOOL DISTRICT 2018-01-02 MF Import

w r nnd D Area D 6es in a seasonally ponded topographic low extending beyond the southern properry boundary, in the southeast corner of the site and receives surface water flows. The dominant hydrophyuc vegetation of this hydrolugically isolated 7,460 square foot(0.171 acre)Palustrine scrub- shrub/emergent mazsh wedand is spirea,willows,willow weed(Polygonum[apathifolium,FACW+), soft rush and salmonberry. Due to the presence of a dense understory in the ponded azeas, an open water habitat dces not exist. Approximately 5,600 square feet of the wedand aze located within the project boundazy, and the remainder, or approximately 1,860 squaze feet is Iceaced within the Paine Field property to the south. In the center of the wetland, and extending to its southern margins, water is ponded to a depth exceeding 12 inches. , Principally due to small size, this weUand provides minimal hydrologic and biologic funcfional values. :ts hydrologic funcflon is rechazge and due to underlying hazdpan, recharge potential is limited. Habitat values aze not significanfly different from surrounding uplands. No disturbance of this wedand is planned and a minimum 25 foot buffer will be retained azound it. wet[and E Area E is a 42,500 squaze foot(0.976 acre) mixed Palustrine scrub-shrub, emergeat snd open water wedand predominanfly lceated on the Sno-Isle Skills Center, in the southwest corner of the project site. The extreme easterly northem boundary of the site was formed by fill for a now abandoned horse corral. In the absence of data to the contrazy, flows to the wedand appeaz to be from surficial sources, although some spring sources aze possible. No inlet or ouUet is apparent from field invesagation. The weUand vegetadon for the easterly half of this azea is dominated by a nearly monotypic cattail commuairy, with slough se3ge and willows at it� mazgins, as remaining elements of the plant community in this pordon of the wedand. The chazacter of the western half of the wetland trends more to non-vegetated open water as a dominant feamre (between 50 and 100 percent). The fringes of the secbon support salmonberry, slough sedge, red alder and willows, although spazse cattail is found towazd the central porfion of the secrion. Along the southern shore of the sec6on, 50 percent open water is typical. The understory communiry along the shore includes Labrador tea, soft rush, creeping buttercup, salmonberry and spirea, with red alder and willow as the overstory. Standing water at a depth of 12 inches or more was typical for the more than 50 percent of the weda�d where standing water was present. In other locations the rypical depth of saturaaon was at two inches or less. Wetland E provides moderate hydrologic and biotogic functional values. Its hydrologic values aze derived principally from its size and opportunity for recharge. In the standing water segments of the x� Mukilteo Sch. Disr. Central Faciliry Fina(Ffidgnaon Plan paa0 5 Lovell-Sauerland &Associate.s. Inc.