TagFour Post Plan(16)

On April 2, 1990, the FAA announced it would implement the 'Four-Post Plan,' a set of air traffic control procedural changes at Seattle-Tacoma International Airport designed to reduce congestion, improve efficiency, and address worsening arrival delays. The plan, developed after nearly a year of public meetings, environmental review, and computer simulation of 13 alternatives, was determined to produce no significant noise impact on surrounding communities. The FAA cited a 30,000 increase in annual landings and takeoffs since 1988 and the failure of mediation talks to produce an agreed-upon flight path solution as key reasons for moving forward with the changes.

This 1990 document outlines a comprehensive package of noise abatement actions for Seattle-Tacoma International Airport, agreed upon by a Mediation Committee on March 31, 1990. It covers measures such as nighttime flight restrictions, soundproofing programs for nearby homes and public buildings, improved flight corridors, and a new noise management monitoring system. According to the technical consultant involved, full implementation of these agreements could reduce noise levels by approximately 50% for communities surrounding the airport.

This 1980 Federal Aviation Administration order establishes noise abatement procedures for aircraft operating to and from Seattle-Tacoma International Airport and Boeing Field. It directs turbojet aircraft to fly over Puget Sound and Elliott Bay whenever possible, sets altitude and distance restrictions before aircraft can turn toward populated shoreline areas, and defines preferred takeoff and landing runways to minimize noise impact. The procedures apply to both VFR and IFR turbojet flights, with stricter nighttime rules between 2200 and 0600 local time.