TagFour Post Plan(16)
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2012-03-28Highline Forum Agenda and Draft Meeting Minutes, March 28, 2012 and November 16, 2011
The Highline Forum, a regional body representing cities surrounding Seattle-Tacoma International Airport, met in November 2011 to discuss aircraft noise concerns, including missed approaches and over-flight patterns affecting communities like Normandy Park and Federal Way. The meeting featured an FAA briefing on the Four Post Plan governing air traffic flow, as well as an update on the Greener Skies Initiative, which aims to use advanced navigation technology to reduce noise and emissions during aircraft approaches. A follow-up meeting was scheduled for March 2012 to continue discussions on refining the Forum's role and addressing ongoing community and port issues. -
2002-10-23EXH AR038735: Interlocal Agreement, Airport Communities Coalition
Interlocal Agreement establishing the Airport Communities Coalition (ACC) under the Interlocal Cooperation Act (RCW Chapter 39.34), signed by the cities of Normandy Park, Des Moines, Burien, Federal Way, and Tukwila, each a Washington Municipal Corporation. The agreement opposes construction of a third runway at Seattle-Tacoma International Airport, opposes increased air traffic at Boeing Field, seeks -
1995-12-04Seattle 4-Post Decision and Order
This 1995 FAA Decision and Order addresses longstanding air traffic congestion and inefficiency problems at Seattle-Tacoma International Airport (Sea-Tac), stemming from outdated flight route procedures established in the 1970s. The document explains that existing arrival and departure routes caused safety concerns, reduced airport capacity, and increased controller workload, particularly when runway directions changed multiple times daily. It also notes that the so-called 'noise abatement' procedures from 1974 were not based on any coherent noise reduction plan, but were largely the result of moving flight paths away from communities that had complained. -
1993-04-29EXH AR037723: Puget Sound Regional Council Resolution A-93-03 Amending the 1988 Interim Regional Airport System Plan (RASP)
Resolution A-93-03 adopted by the Puget Sound Regional Council General Assembly on April 29, 1993, amending the 1988 Interim Regional Airport System Plan (RASP) for long-term commercial air transportation capacity needs of the central Puget Sound region (King, Kitsap, Pierce, Snohomish counties). Establishes as preferred alternative a major supplemental airport in the four-county area plus -
1993-04-19ACC Strategy Options and Recommendations Memorandum by Cutler & Stanfield
A 1993 confidential legal memorandum from law firm Cutler & Stanfield to the Airport Communities Coalition (ACC) outlines strategies for opposing the planned third runway expansion at Seattle-Tacoma International Airport. The memo recommends that the ACC Cities prioritize preventing new runway construction as their primary goal, with secondary goals focused on reducing noise impacts, limiting night flights, and improving mitigation for affected residents. The overarching strategy was to build enough political and legal leverage so that airport expansion decisions could not practically move forward without the ACC Cities' participation. -
1992-06-12
Flight Patterns – FAA’s ‘Four Post’ traffic plan for planes is illogical, insulting
June 12, 1992 Publication: THE SEATTLE TIMES Page: A9 Word Count: 354 The Ninth Circuit in San Francisco recently voted that since the noise level was not above 65 decibels (recently raised from 55 decibels) the Federal Aviation Administration did not have to be subject to any environmental impact requirements. Therefore, the FAA’s brilliant “four post” plan remains -
Seattle Community Council Federation v. FAA 961 F.2d 929
961 F.2d 829 SEATTLE COMMUNITY COUNCIL FEDERATION, a Washington nonprofit corporation, Petitioner, v. FEDERAL AVIATION ADMINISTRATION; Samuel Skinner, Respondents. No. 90-70253. United States Court of Appeals, Ninth Circuit. Argued and Submitted Jan. 8, 1991. Decided April 9, 1992. Peter J. Eglick and Henryk J. Hiller, Seattle, Washington, for petitioner. Peter R. Steenland, Jr., and J. -
1992-04-09Seattle Community Council Federation v. F.A.A., 961 F.2d 829 (9th Cir. 1992)
In 1992, the Ninth Circuit Court of Appeals upheld the FAA's decision to change flight patterns for turbine-powered aircraft at Seattle-Tacoma International Airport without preparing a full Environmental Impact Statement. The FAA had issued a Finding of No Significant Impact based on a computer noise model using the 65 decibel day-night sound level as the threshold for significant noise impact, which the court found to be a reasonable approach. The Seattle Community Council Federation had challenged the decision, arguing that the FAA failed to adequately assess the noise effects on surrounding communities. -
1991-03-31Port Of Seattle Flight Track Sample: South Flow Arrivals/Departures — Pre- and Post-Four Post Plan Comparison Maps
Two Port Of Seattle flight track sample maps showing jet arrivals and departures at Seattle-Tacoma International Airport (SEA) under south flow conditions. Page 1 dated 03/31/91 (06:00–22:00), labeled ‘4 Post’ — showing departures to the south with flight tracks visible over Seattle and surrounding areas. Page 2 dated 03/22/89 (04:30–24:00), labeled ‘Pre-4 Post’ — showing -
1991-03-31
Port Of Seattle Flight Track Sample: South Flow Arrivals/Departures — Pre- and Post-Four Post Plan Comparison Maps
These two Port of Seattle Flight Track Sample maps compare jet aircraft arrival and departure patterns at Seattle-Tacoma International Airport (SEA) under south flow conditions, one from March 22, 1989 (pre-4 Post) and one from March 31, 1991 (4 Post). Both charts plot all jet flight tracks between approximately 4:30–24:00 and 6:00–22:00 respectively, showing how flight paths over the Seattle region shifted between the two periods. The maps are annotated to highlight southbound departures and arrivals over Seattle, serving as visual evidence for noise impact analysis related to airport runway and procedure policy changes.