7007 SEAWAY BLVD 2016-01-01 MF Import

9. SUMMARY The Narbeck Wetland Sanctuary (Wetland Compensation Bank N2) has been successfully conswcted as per the goals and objPctives tisted in Section 1 of thie report. A diverse wetland system has resulted with complex associations between different wetland end upland community types. The open water and deep marsh � habitats specifically compensate for simiiar wetland functions and values which will be lost as a result of dev�lopment at Snohomish County Airport. Wildlife habitat has b�en greatiy increased over pre-project conditions. Hydrologic support has been im;�roved by decreasing peak flows and increasing low flows from Narbeck Swamp to Narbeck Creek. The new wetland area also provides for additionai storm and floodwater storage. Wetland buffers and environmental protection areas have been preserved and enhanced :o protect and screen the wetiand sanctuary from surrounding Iand uses. Visitors to the park will benefit from the many educational and recreationai features included in the project. The goais and objectives for the Narbeck Wetland Compensation Bank specify the creation of 7.84 aaes of new wetland and the enhancement of 0.6t7 acres of pre- existing wetland, toteling 8.44 acres of wetland in the finished project area. Projected wetland buffer area was 16.07 acres, and environmental protection area 3.39 acres. The total created wet�and area which has been calculated based on the anticipated wetland boundary and as-built topography equals 7.66 acres. This figure includes the leaky berm, which while not technically wetla�id, has been inciuded as an essential and integral part of the overall project from the beginning. Thg final preserved/enhanced wetland area was consistent at 0.60 acres. The discrepancy between the projected wetland area (7.84 acres) and the final calculated wetland area (7.66 acres) is due to the construction of a detention pond and a sidewalk almg the access road which was reauired by the Ciry of Everett. These features equal 0.18 acre which had been projected to be wetland. The wetland buffer area, based on an average 100-foot buffer width, has been established. The environmental protection area was reduced to 1.87 acres with the sale of a strip of property that allowed for the purchase of a 6.9-acre section oS the Narbeck Wetland Sanctuary. This transaction is explained in Section 8, item 8 of this report and shown graphicaily in Appendix C. Progress at the Narbeck �Netland Compensation Bank will be documented during the compliance monitcring period. The Watershed Company is under contract to conduct these studies. Ca�npliance monitoring will begin one year after acceptance of the as- built condition. Mcnitoring will be completed annually during the growing season with reports submitted :y October 31 st for Years 1, 2, 3, 4, and 5, or until performance 47