Notes
Exhibit AR034998-AR035000, Attachment E: Summary table of compensatory mitigation (on-site and off-site) for watershed, wetland, and stream impacts at Seattle-Tacoma International Airport related to third runway embankment and South 154th Street relocation. Details on-site permanent impacts including filling approximately 980 linear feet of Miller Creek channel, filling 8,500 cy of Miller Creek floodplain, and filling drainage channels near 12th Avenue South; mitigation actions include relocating 1,080 ft of Miller Creek, creating new permanent drainage channels, replacing lost floodplain (5.94 acre-ft flood storage), restoring 9 acres at Vacca Farm as shrub-dominated wetlands, restoring wetland buffer at Lora Lake, enhancing 10.25 acres of wetlands along Miller Creek, restoring wetlands at Tyee Valley Golf Course, and establishing buffers along Des Moines Creek. Target functions include fish and aquatic habitat, amphibian habitat, organic matter export, groundwater exchange, flood storage, nutrient and sediment trapping, and waterfowl habitat reduction.