TagSea-Tac Airport(1835)

In April 1993, the Puget Sound Regional Council adopted Resolution A-93-03, amending its Regional Airport System Plan to address long-term commercial air transportation needs for the central Puget Sound region. The resolution established a dual-track strategy of pursuing both a major supplemental airport within the four-county area and a third runway at Sea-Tac Airport, with the third runway to be authorized by April 1, 1996 unless a viable supplemental site could eliminate that need. Key conditions attached to the third runway approval included independent evaluation of demand management programs and measurable noise reduction performance objectives, while small supplemental airports such as Paine Field were eliminated as preferred alternatives.

In April 1993, the Puget Sound Regional Council adopted Resolution A-93-03, amending its 1988 Regional Airport System Plan to address long-term commercial air transportation needs in the central Puget Sound region. The resolution established a preferred strategy of pursuing both a major supplemental airport within the four-county area and a third runway at Sea-Tac Airport, with the third runway to be authorized by April 1, 1996 subject to conditions including noise reduction performance objectives and demand management efforts. The resolution also eliminated small supplemental airports such as Paine Field as a preferred alternative and called for site-specific environmental impact studies on the proposed Sea-Tac third runway.

This quarterly Sea-Tac Noise Abatement Report from the Port of Seattle (Q4 1992) tracks progress in reducing airport noise, highlighting that 71% of jet flights were operated by quieter Stage 3 aircraft, up from 63.4% the previous quarter. All airlines stayed within their allocated noise budgets, and new nighttime restrictions effective October 1, 1992 limited louder Stage 2 jets between midnight and 6:00 a.m. The report also outlines noise abatement flight procedures designed to route departing and arriving aircraft over industrial areas and water to minimize noise impacts on surrounding communities.

This Port of Seattle document explains flight track plots for Seattle-Tacoma International Airport, which are overhead graphic illustrations showing the ground paths of arriving and departing jet aircraft over a 24-hour period, separated into daytime and nighttime operations for both north and south traffic flows. The data is sourced from the FAA's Automated Radar Terminal System (ARTS). Notably, the document emphasizes that even aircraft following identical routes will not fly the exact same path, as factors like pilot technique, air traffic control, weather, and aircraft performance cause flight corridors to widen with increasing distance from the airport.

A March 1993 letter from the RCAA (Regional Commission on Airport Affairs) Executive Board addressed to John Sandelius of Seattle, thanking him for his time, energy, and wisdom contributed to the organization's efforts regarding Sea-Tac Airport noise issues. The letter expresses well-wishes for his recovery and notes that his work was valued whenever the community needed him. The document is endorsed by a wide coalition of over 50 community organizations, city governments, and civic groups from the greater Seattle and South King County area opposing airport noise expansion.

The Puget Sound Air Pollution Control Agency (PSAPCA) raised concerns in 1992 about inadequate air quality analysis in the Flight Plan Project's environmental impact statement, citing missing dispersion modeling for both vehicle and aircraft emissions near Sea-Tac Airport. A follow-up 1992 letter addressed the use of ethylene glycol as a de-icing agent at Sea-Tac, concluding it was unlikely to pose a significant air quality risk due to its low vapor pressure. A 1993 internal memo clarified PSAPCA's role in reviewing airport-related environmental impact statements and conducting annual inspections of registered equipment at airports within its jurisdiction.

The Regional Commission on Airport Affairs (RCAA) was a coalition of cities and citizen groups in the Puget Sound region that opposed the proposed third dependent runway at Seattle-Tacoma International Airport in the early 1990s. The organization compiled expert research and white papers covering noise impacts, public health effects, environmental and social consequences, and economic costs associated with airport expansion. Their goal was to identify financially feasible and environmentally responsible alternatives to meet the region's air capacity needs without further expanding Sea-Tac.