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

Project goals and objectives include the maintenance of qualitative funcfional elements of the natural system on the site. The principal project goal is compensatory miagation for low-value wetland losses due to construcaon through the creation of new wetlands adjacent to a functional wetland approximatety 0.976 acres in size. Other goals include removal of the surface soils from a former corral on the north side of Wetland E and use oi a temporary erosion and sedimentation con7ol plan to protect exisung wetlands during consavcdon of new weUands. Construction plans specify a stepwise program for implementaaon of the planned midgation, including pre-consavction meeting, as well as staking of mifigafion zones and imptementauon of temporary erosion and sedimentauon control measures;cleazing and grubbing;excavadon of weflands and midgauon azea and stockpiling oF soil materials and contained rootstock and seedstock; . replacement of soil materials; planung, hydrologic regime establishment and post-planting requirements; and post-construcaon meeting. Performance standards will ensure project success and provide a set of criteria for evaluafing contractor and design effec6veness in meefing project goals. The moniroring program will use performance standazds to assess project success over a five yeaz period following mitigauon construction and provide data to judge degree to which individual components of the overall mitigation plan meet the desired requirements. In the event of an idenflfied miugauon shortfall, as iden6fied by the monitoring program, a series of contingency acflons may be considered by the monitoring biologist and City of Everett staff. Based on review of project costs and approval by Ciry of Everett, a performance securiry bond for wedand and landscape liability will be provided to the City by the project appiicant to ensure that all cosu for monitoring and maintenance wIIl be met during the monitoring period and that. if required, contingency actions can be accomplished during the first four yeazs following compleaon of wetlands construcaon. 2.2 Project Impacts The Wetland Delineation and Conceptual Mitigation P[an discussed impacts due to construcaon and portrayed lceations of weUands on the site, including those to be removed or affected. Wetland The lazgest of the site weUands is along the project eastern boundary and extends into and is contiguous with the major Kasch Bog weUand system within the Commuuity Transit faciliry to the east. This 1.3 acre Palustrine scrub-shrub wetland is hydrologically connected to a drainage which enters the site from the east and exits through a 24 inch culvert wiihin the Transit facility. The underlying soil material is peat. The majority of the wetland's 56,615 squaze foot azea A contains a hydrophyfic understory vegetation characterized by Douglas' spirea(Spirea douglasii,FACV1�, soft rush (Juncus e,�'usus, FACW+), slough sedge (Carex obnupta, OBL), Labrador-tea (Ledum groenlandicum, OBL) and lady-fern(Athyrium filix femina, FAC). In some areas underlain by peat, well-established salal (Gau(theria shallon, UPL) otherwise gives the impression of an upland Mukilteo Sch. Dis[. Centra[Faciliry Final bfidgarion Plan Page 3 I Lovell-Sauerland &Associates, Inc.