TagSea-Tac Airport(2023)

This document contains reference data for the Seatac Groundwater Study, compiled by Associated Earth Sciences, Inc. The dataset, totaling 10.4 MB across 17 files, includes flat-file format tables covering bore holes, water levels, geology, hydraulic parameters, and well segments related to groundwater conditions in the Sea-Tac area. The materials were submitted as a legal exhibit and are part of the broader environmental record associated with Sea-Tac Airport.

This 2000 hydrogeologic study, prepared by Associated Earth Sciences, Inc. for the Port of Seattle, examines groundwater conditions beneath the Industrial Waste System (IWS) plant and lagoons at Seattle-Tacoma International Airport. The report assesses soil geology, groundwater flow direction, and water quality — including levels of volatile organic compounds, petroleum hydrocarbons, and ethylene glycol — near three wastewater lagoons on airport property. It concludes with findings and recommendations related to potential contaminant releases and ongoing groundwater monitoring needs.

Sea-Tac Runway Fill Hydrologic Studies Report (AR 045023, project JE9907) prepared by Pacific Groundwater Group, Ecology and Environment, and Earth Tech Inc. for Washington State Department of Ecology Northwest Regional Office, dated June 19, 2000. Report covers hydrologic and hydrogeologic characterization of the Sea-Tac Airport third runway embankment fill area, including Miller Creek and Walker

The Port of Seattle filed an Application for Change/Transfer of Water Right with the Washington State Department of Ecology in June 2000, seeking to add flow augmentation for Des Moines Creek as a purpose of use to an existing well water right (No. 2369) originally used for domestic supply, golf course irrigation, and related uses at Tyee Valley Golf Course in SeaTac. The proposed change would extend the water right beyond 2000 to support creek flow augmentation alongside continued domestic supply and golf course irrigation, covering the Des Moines Creek corridor from the airport property to the creek's mouth at Puget Sound. This application reflects the Port's efforts to manage water resources in connection with environmental and operational responsibilities related to Sea-Tac Airport.

Letter dated June 15, 2000 from Lowell H. Johnson, Manager of FAA Northwest Mountain Region Airports Division, to Steve Landino, Branch Chief of the Washington State Branch of the National Marine Fisheries Service (NMFS), transmitting the Final Biological Assessment (FBA) for Seattle-Tacoma International Airport (STIA) development actions under ESA section 7 consultation. The FBA evaluates

Email from Andy McMillan (SEA program) dated June 12, 2000, forwarded by Tom Luster to Raymond Hellwig on October 6, 2000, transmitting the official version of a Word document titled “Lessons Learned from Big Projects: Recommendations for SEA Program.” The attached document outlines 7 recommendations developed from SEA program staff experiences with large, complex projects

Email dated June 12, 2000 from Erik Stockdale (Wetlands Specialist, Washington State Department of Ecology) to Jim Kelley (Parametrix) and Elizabeth Leavitt (Port of Seattle), summarizing a June 9, 2000 conversation regarding the Wildlife Hazard Management Plan (WHMP) and its consistency with the Natural Resource Mitigation Plan (NRMP) and 401 water quality certification. Stockdale outlines

Biological Assessment prepared by Parametrix, Inc. for the Federal Aviation Administration and Port Of Seattle regarding reinitiation and initiation of Section 7 ESA consultation for Seattle-Tacoma International Airport Master Plan Update Improvements. Covers ESA-listed species managed by USFWS and NMFS including Chinook salmon, bull trout, and essential fish habitat (EFH). Analyzes hydrologic systems including Miller

Hart Crowser draft subsurface conditions data report (project J-4978.21) prepared for Port Of Seattle and HNTB, June 2000, covering the West MSE (Mechanically Stabilized Earth) Wall for the Third Runway Embankment at Sea-Tac International Airport. Report includes generalized geologic conditions, subsurface soil conditions, consolidation test results, CU and UU triaxial compression test results, hydrogeologic conditions,