TagSea-Tac Airport(2025)

HNTB-prepared maps dated September 27, 2001 showing Phase 4 Construction Wetlands Impact under Post 404 Permit at Sea-Tac Airport. Administrative Record documents AR052143 and AR052144 depict wetland areas impacted by Phase 4 construction, including labeled wetland polygons (A5, A6, A7, A8, W1, W2, wetlands 16, 18, 19, 20a, 20b, 21, 22, 23, 35a, 35b, 35c,

Draft geotechnical engineering report prepared by Hart Crowser, Inc. for HNTB regarding the Third Runway Embankment, Phase 5 at Sea-Tac International Airport, SeaTac, Washington (project no. 4978-28, AR 052045). Authored by Josepha D. Celes (Senior Staff Geotechnical Engineer) and Michael Bailey, P.E. (Project Manager). Covers site preparation, subgrade improvement, embankment fill construction, TESC Pond A,

Meeting notes from Erik Stockdale discuss wetland monitoring activities, including monthly groundwater sampling, continuous recorders at drainage channels, and vegetation mapping. Topics covered include hydrology monitoring changes, performance standards for hydrological discharge, and sampling schedules running bi-monthly from November through May. The notes reference coordination among multiple parties regarding soil sampling, data thresholds, and revised performance standards.

AR017274 — Site stormwater monitoring data for STIA construction projects dated 9/26/2001, compiled by R. Simmons and S. Currie. Documents pH readings, turbidity, sheen observations, and field comments for multiple construction discharge sites including SDE4-911, SDE4-918, SDE4-948, SDE4-958, SDE4-282, SDE4-059, SDE4-064, SDE4-996, SDE4-064, SDE4-118, SDE4-111, SDE4-059, SDE4-074. Covers projects including Booster Pump Station, Air Traffic

Hart Crowser, Inc. subsurface conditions data report (project 4978-28) prepared for HNTB, dated September 21, 2001, covering Phase 5 Fill and Subgrade Improvement for the Third Runway Embankment at Sea-Tac International Airport, SeaTac, Washington. Report authored by Carsten Becker (E.I.T., Senior Staff Geotechnical Engineer) and Michael J. Bailey (P.E., Project Manager). Covers geologic and hydrogeologic

Conference paper submitted September 21, 2001 to Water Environment Federation for Watershed 2002 conference, authored on behalf of the Port Of Seattle regarding Sea-Tac Airport stormwater best management practice (BMP) screening. Tests filtration media — deciduous leaf compost (CSF®), soybean hulls (SBH), extra fine deciduous leaf compost (XFCSF), commercial inorganic polyamine sponge, and zeolite/perlite (ZP)

Researchers tested several filtration media, including leaf compost (CSF®) and soybean hulls, for their ability to remove zinc and reduce toxicity from stormwater runoff at Seattle-Tacoma International Airport. The study was prompted by prior water quality monitoring that linked stormwater toxicity to zinc from building materials in certain airport drainage areas. Results from these controlled laboratory tests were used to select the best-performing media for future on-site stormwater treatment trials at the airport.

Letter dated September 19, 2001 from Lowell H. Johnson, Manager, FAA Airports Division, Northwest Mountain Region, to Thomas F. Mueller, U.S. Army Corps of Engineers, Regulatory Branch, Seattle District Office, responding to Mueller’s August 15, 2001 inquiry comparing operational data to SIMMOD model predictions for Sea-Tac Airport (KSEA). Enclosure paper titled ‘Delay at Seattle-Tacoma International

Port of Seattle webpage (AR028013) describing Third Runway construction progress at Seattle-Tacoma International Airport (Sea-Tac Airport). Details include delivery of fill material via temporary on/off ramps connecting South 176th Street and Highway 509, construction of retaining walls, stormwater detention pond, timber noise wall, and shoulder widening along SR-509. Contract for 1.9 million cubic yards of

Administrative Record AR051194 — Primavera Systems schedule document for the 3rd Runway Program (000683 Master Plan) at Sea-Tac Airport, updated as of 01SEP01. Covers Program Management, Environmental Permitting, West Side Laydown Area CIP, Auburn Wetlands Fill & Mitigation – Grading, and Safety Areas 16R/16L. Activities include site acquisition, noise mitigation, DOE 401 permit, environmental permitting,