Notes
Parametrix, Inc. (Jim Kelley, Ph.D.) transmittal to Muffy Walker, U.S. Army Corps of Engineers (ACOE), dated November 2, 2001, responding to ACOE questions on 26 October 2001 submittals for the Sea-Tac International Airport (STIA) Master Plan Update (MPU) Natural Resource Mitigation project (Project No. 556-2912-001-03). Responses address: 1980 and 1990 air photos and wetland overlays including Wetland B14 and Borrow Area 4; Miller Creek basin (~5,140 acres), Walker Creek sub-basin (~540 acres), and Des Moines Creek basin (~3,750 acres) sizes with King County GIS land use data; Low-Flow analysis for Walker Creek, low flow vault mitigation, and Hart Crowser (May 23, 2001) memorandum on Pond F infiltration infeasibility; wetland/open water acreage table showing percent changes for Miller Creek (-4.0%), Walker Creek (-3.3%), and Des Moines Creek (-3.8%) with and without project; cattail performance standards (less than 10% cover) for Auburn mitigation site (Table 7-7.1); and Table 6-2 from SMP page 6-5. Includes wetland restoration at Vacca Farm, Lora Lake, Des Moines Way Nursery, Bow Lake, and WSDOT SR509 Wetland B. AR record numbers 026273–026275.