TagPort Of Seattle(2410)

A February 2002 technical letter from GeoSyntec Consultants, submitted to the U.S. Army Corps of Engineers on behalf of the Airport Communities Coalition, raises serious concerns about the Port of Seattle's water flow analysis for the Sea-Tac Third Runway expansion project. The report argues that the Port's analysis fails to account for the years-long delay before water would flow through the new embankment fill and reach surrounding creeks, potentially leaving those creeks without adequate water during the critical early years after construction. GeoSyntec concludes that the storage vaults designed to protect creek water levels are likely undersized and that the Port has not reliably demonstrated the project will meet low streamflow requirements.

A February 2002 technical letter from GeoSyntec Consultants, written on behalf of the Airport Communities Coalition, raises concerns about the Port of Seattle's low flow analysis for the Sea-Tac Airport Third Runway expansion project. The letter argues that the Port's analysis fails to account for the years-long delay before water would flow through the new embankment fill into drainage systems feeding nearby creeks, potentially leaving those creeks without adequate water during the critical early years of operation. GeoSyntec concludes that the Port has not demonstrated the project's storage vaults are properly sized, and that the underlying computer models are unreliable due to lack of calibration and flawed assumptions about soil hydraulic conductivity.

This February 6, 2002 letter from Helsell Fetterman LLP transmits field notes from a January 28, 2002 site visit by wetlands experts Peter Willing and Bill Rozeboom, submitted as part of the legal case Airport Communities Coalition v. Ecology and Port of Seattle (PCHB No. 01-160). The handwritten field notes document observations of water resources, drainage structures, and site conditions at or near Sea-Tac Airport. The materials were shared with multiple parties involved in the Pollution Control Hearings Board proceeding.

This legal document is a supplemental response filed by the Airport Communities Coalition (ACC) in a Washington State Pollution Control Hearings Board case against the Port of Seattle and the Department of Ecology. It lists scientific references and studies relied upon by ACC's expert witnesses, covering topics such as water quality, dissolved oxygen levels from runway de-icing at Seattle-Tacoma International Airport, and the effects of airport-related chemicals on aquatic life including salmon and trout. The document reflects ongoing litigation over the environmental impact of Sea-Tac Airport operations on surrounding waterways.

This legal declaration by William A. Rozeboom, filed before Washington State's Pollution Control Hearings Board, challenges the Port of Seattle and the Department of Ecology over their environmental review of Sea-Tac Airport expansion. Rozeboom disputes the adequacy of water flow modeling used to assess impacts on Walker and Des Moines Creeks, argues that wastewater system effects on stream flow were improperly ignored, and contends that the proposed mitigation conditions in Ecology's 401 Certification are insufficient. He also challenges claims that the Port fully complied with King County's Surface Water Design Manual, noting the Port exempted itself from key drainage review requirements.

Letter dated February 5, 2002 from Hamid ‘Ed’ Abbasi, Environmental Engineer, Washington State Department of Ecology (NWRO) to Michael Feldman, Director of Aviation Facilities & Environmental Programs, Seattle-Tacoma International Airport. Ecology denies the Port Of Seattle’s request for an Administrative Order to bypass the industrial waste treatment system at Lagoon #3 under NPDES Permit WA-002465-1,

This document is a declaration by environmental scientist Dyanne Sheldon, submitted in support of the Airport Communities Coalition's motion for a stay in a Washington State Pollution Control Hearings Board case challenging permits issued to the Port of Seattle. Sheldon outlines her extensive background as a wetland ecologist and land-use planner, including her role in creating King County's pioneering wetland management program in the early 1980s. The case centers on a Section 401 Water Quality Certification and Coastal Zone Management Act concurrency statement issued to the Port of Seattle in connection with Sea-Tac Airport expansion activities.

This legal document is part of a Pollution Control Hearings Board case in which the Airport Communities Coalition (ACC) challenged the Port of Seattle and the Washington State Department of Ecology over environmental concerns related to Seattle-Tacoma International Airport. The document lists scientific references and studies relied upon by ACC's expert witnesses, covering topics such as the effects of airport deicing chemicals on water quality, dissolved oxygen levels in receiving streams, toxicity to aquatic life including salmon and trout, and fluoride impacts on fish. The referenced research was used to support ACC's claims about the environmental impact of airport operations on surrounding waterways and ecosystems.

This 2002 legal document is a supplemental response filed by the Airport Communities Coalition (ACC) in a Pollution Control Hearings Board case against the Washington State Department of Ecology and the Port of Seattle, related to the expansion of Seattle-Tacoma International Airport. It lists technical documents and expert references relied upon by ACC's witnesses, covering topics such as hydraulics, biology, and geotechnical engineering related to the proposed third runway project. The filing also summarizes the prior trial testimony experience of expert witnesses retained by the ACC.

A February 2002 letter from Marten Brown attorneys transmits a CD-ROM of data files and related emails from Pacific Groundwater Group (PGG) to opposing counsel in the case ACC v. Port of Seattle. The materials include technical data and correspondence relied upon by expert Charles Ellingson and PGG in forming their opinions and conclusions. Supporting emails from October 2001 detail groundwater inflow and surface runoff modeling data exchanged between consultants Joe Brascher and PGG.