July 24, 2001August 2, 2026

EXH AR029208: 401 Permit Decision-Making, Sea-Tac Airport Third Runway — Final Meeting Notes, Low Flow Analysis

Notes

Final meeting notes from July 24, 2001 conference call on 401 Permit Decision-Making for Sea-Tac International Airport Third Runway, Low Flow Analysis. Prepared by Kate Snider, Floyd & Snider Inc. Attendees included Ann Kenny (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port of Seattle), Paul Fendt (Parametrix), Joe Brascher (Aquaterra). Discusses Port of Seattle proposed modifications to Walker Creek Basin approach including impermeable cover on Pond F, lining of selected filter strips adjacent to runways, reserve storage vaults, embankment seepage removal from post-project 2006 model, and clarifications to July 23 submittal. Document references ECY00015004, AR029208, Walker Creek vault design, DEEPFRAC component, Pacific Groundwater Group memo 6/25, SMP impervious area assumptions, and summer low stream flow impact calculations.

Sidebar On/Off

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.

continue...

V V

Notes

Message