EXH1106041715

PCHBPollution Control Hearings Board of the State of Washington

SUMMARY OF OFF-SITE MITIGATION HABITAT FUNCTIONS ........................... l0 H_qT OF FIGURES Figure PaKc Location of Seattle-Tacoma International Airport and the Off-Site Wetland Mitigation Project ........................................................................................................... 5 Proposed Plant Associations for the Off-Site Wetland Mitigation Site ......................... 6 Proposed Wetland Classes on Buffer Vegetation Types for the Off-Site Wetland Mitigation Site ................................................................................................. 7 Grading Plan for the Off-Site Wetland Mitigation Project ............................................. 8 LIST OF TABLES Table Page Wetland impacts at Seattle-Tacoma International Airport from development projects (as of July 14, 1998) ........................................................................................... 3 Summary of design objectives for the proposed off-site mitigation as of July 14, 1998 .................................................................................................................... 9 Seattle.TacomaInternationalAirport -i. Pon ofSeanle RevisedOff-SiteMitigationPlan Augu.ff18, 1998 AR 041717 1. INTRODUCTION In December 1996, the Port submitted an application to the Army Corps of Engineers for a permit to fill wetlands at Sea-Tat Airport associated with the Master Plan Update improvements in compliance with Section 404 of the Clean Water Act. The Section 404 permit application submitted to the Corps of Engineers includes a Joint Aquatic Resource Permits Application (JARPA). The JARPA includes reports on the delineation of wetlands at Seattle-Tacoma International Airport (STIA), a wetland mitigation plan, a mitigation plan describing the relocation of Miller Creek, and accompanying tables and drawings describing the proposed project. 1.1 RATIONALE FOR OFF-SITE HABITAT MITIGATION Wildlife habitat mitigation at the STIA is not feasible because: (1) in the Record of Decision for the project, FAA concluded that "wildlife attractions" within 10,000 ft of an active runway is not allowable; and (2) wildlife control activities…
V V