October 21, 2002August 2, 2026

ACC’s interrogatories nos. 1-19 and requests for production nos. 1-6 to Port Of Seattle and Port Of Seattle’s objections and responses thereto

Notes

This document contains the Port of Seattle’s objections and responses to interrogatories and requests for production filed by the Airport Communities Coalition (ACC) before the Pollution Control Hearings Board (PCHB No. 01-160). The Port identifies expert witnesses it intends to use in the matter, including specialists in geotechnical engineering, toxicology, hydrology, and environmental science. The Port also raises general and specific objections to certain discovery requests.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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