TagThird Runway(1098)

In September 2002, the Port of Seattle filed a lawsuit in King County Superior Court challenging eight of sixteen environmental protections imposed on its Third Runway project by the State Pollution Control Hearings Board (PCHB). The Airport Communities Coalition, which opposed the runway expansion, argued that this legal action proved the Port could not build the Third Runway while complying with environmental and water-quality laws. This appeal marked the third time the Port had used the courts to attempt to weaken environmental safeguards tied to the project.

The Port of Seattle filed a petition in August 2002 asking the Pollution Control Hearings Board to reconsider Condition 8 of its Final Order, which prohibited the use of a soil-testing method called SPLP (Synthetic Precipitation Leaching Procedure) to approve fill material for the Third Runway expansion project at Sea-Tac Airport. The Port argued that banning SPLP made it nearly impossible to find acceptable fill soil, since up to 78% of naturally occurring, uncontaminated soils would fail the Board's strict numeric criteria when tested across multiple constituents. The Port maintained that proper use of SPLP poses no environmental threat to water quality and requested the Board allow its use under specific conditions so the runway project could proceed.

Port Of Seattle petition filed August 22, 2002 with the Pollution Control Hearings Board (PCHB No. 01-160) requesting reconsideration of Condition 8 of the Final Order dated August 12, 2002, which prohibited use of the Synthetic Precipitation Leaching Procedure (SPLP) to authorize importation of fill exceeding modified fill criteria. Appellants are Airport Communities Coalition (ACC)

This August 2002 permit application by the Port of Seattle outlines proposed Master Plan Update improvements at Seattle-Tacoma International Airport, including the construction of a third runway, expanded taxiways, cargo facilities, and terminal upgrades. The documents map both on-site and off-site wetland mitigation areas required to offset environmental impacts, with retaining walls and creek relocations used to minimize effects on wetlands and Miller Creek. The project spans multiple sections of King County, Washington, and includes detailed plans for stormwater detention, runway safety areas, and property acquisition boundaries.

This August 2002 document outlines proposed Master Plan Update improvements at Seattle-Tacoma International Airport (Sea-Tac), submitted by the Port of Seattle. It details construction projects including a third runway, runway safety areas, terminal expansions, and air cargo facilities, along with wetland impact mitigation measures in the Miller Creek Basin. The plans include on-site and off-site wetland mitigation areas, MSE retaining walls to minimize environmental impacts, and creek relocations across multiple sections of King County, Washington.

ACC (Airport Communities Coalition) motion filed with the Pollution Control Hearings Board (PCHB No. 01-160) against State of Washington Department of Ecology and Port Of Seattle, seeking correction, clarification, and/or partial reconsideration of the Order Publishing Certain Portions of Depositions of Ecology Managers and CR 30(b)(6) Designated Witnesses. Motion identifies three categories of discrepancies: (1)

Pollution Control Hearings Board (PCHB) case No. 01-160, hearing held March 18-29, 2002. Airport Communities Coalition (ACC) appellant and Citizens Against Airport Expansion (CASE) intervenor versus Washington State Department of Ecology and Port of Seattle respondents. Document presents proposed Findings of Fact, Conclusions of Law, and Order regarding Clean Water Act Section 401 certification for

This document is a legal filing from the Airport Communities Coalition (ACC) submitted to Washington State's Pollution Control Hearings Board in a case against the Washington State Department of Ecology and the Port of Seattle. It lists technical documents and studies relied upon by ACC's expert witnesses, covering topics such as retaining wall and slope alternatives affecting Miller Creek, seismic analysis of reinforced soil walls, and stormwater runoff management near Sea-Tac Airport. The referenced materials include engineering evaluations, water quality research, and stormwater best management practice guidelines relevant to the airport's expansion impacts.

This figure (2.1-3) is a map showing wetlands located in the Des Moines Creek Basin near Seattle-Tacoma International Airport (STIA). It identifies delineated wetlands verified by the Army Corps of Engineers (ACOE), water features, streams, and piped streams across the area, with individual wetlands labeled by alphanumeric codes. The map was submitted as part of a supplemental natural resources mitigation plan related to airport development activities in the region.

Reply memorandum filed by Airport Communities Coalition (ACC) in PCHB No. 01-160 before the Pollution Control Hearings Board for the State of Washington, in support of ACC’s motion to redact pre-filed direct testimony of Port of Seattle expert Paul Fendt regarding Walker Creek low flow frequencies. ACC argues that Fendt’s opinions and the March 2002