10011 3RD AVE SE BASE FILE 2016-01-01 MF Import

i I CONCWSION IThe proposed o(fice/storage faciliry would be construaed on a 6.65-acre site in the I City of Everett. T'he immediate proximity of the retail commercial development occurring along Evcrett Mall Way,and the multiple•family development to the west makes the subject propeny particularly attwctive for this rype of development. I A knoll centrally located on the property slopes in a southerly direction [o a tributary ot North Creek in the southwest portion of the property. The stream enters the site from the west via culvert under 7Lird Avenue SE. The stream I channel is poorly defined and the tloodplain relatively broad. No salmonid fishery is known �o occur in this reach of Nonh Creek. I Two wetlands have been identified and delineated on the subject property. A forested swamp dominated by red alder, salmonberry, Pacific water-rarsley, and skunk cabbage occurs in direct association with the stream corridoc The portion I ot this wetland occurring on the subject property encompazses 1.04 acres. The second wetland is located in the southeastern property corner and ac�ually crosses the property line. This scrub•shrub wetland is dominated by spirea with sphagnum ' moss and scattered skunk cabbage present. 7'his wetland totals 03 acres in size,with 0.18 acres occurring on the subjccl property. During an on•site meeting with the Department of Wildli(e, the two wetland areas were revicwed. All parties agreed I that the isolated spirea wetland provided little habitat value and that the siream coaidor wetland should be prou -:ed. Impacts a mitigating measures were also discussed. IClearing and grading the site for development w�uld directly a((ect 0.15 acres of the isolatnd wedand. Several measures have been incorporated into the design of the I project to avoid,reduce and compensate for the impacts to the isolated wetland. By inmrporxting a native growth buffer,which will average 40 feet in width, along the stream rnrridor wcAand boundary, any direct cicaring and grading impacts to this I wetland will be avoided, lt should also be noted, the Washington Department ot Wildlife has recommended a 25-foot buffer,and has agreed that an additional buffer width wauld serve as parcel compensation tor the loss o(0.15 acres of spirea swamp. I 7he use o( a retaining wall along the south properry line will reduce the direct impact on an additional 0.03 acres of the isolated wetland. At the suggestion of the Washington Department of Wildli(e,a conceptual swale enhancement plan has been ' proposed to campensate for the loss of wetland habitat and to assist in maintaining water qualiry. Conceptual design would include hvo types of swales, drainage channel and infiltratian ditch. Both types of the swale would be enhanced with I native plant species. Native trces,shrubs and ground covers would be selected for their abilir�to adapt the environmental conditions of the bottom and side•slopes of the swale. m order to further develop a wetland water regime in the bottom o.'the Iswale,log or rock control strucwres would be design to trap and retain runoff warer. � I