TagPort Of Seattle(2609)

This Port of Seattle document explains flight track plots for propeller aircraft at Seattle-Tacoma International Airport, showing the ground paths of arrivals and departures during daytime hours (6 a.m. to 10 p.m.) for both north and south traffic flows. Aircraft flight paths vary due to pilot technique, weather, and air traffic control, meaning planes assigned the same route will not follow identical tracks. On average, Sea-Tac experiences south flow conditions 65% of the year and north flow 35%, with propeller aircraft kept on separate tracks from faster jet aircraft.

This Port of Seattle document explains flight track plots for Seattle-Tacoma International Airport, which map the ground paths of jet aircraft arrivals and departures during daytime hours (6am–10pm). It describes how wind conditions determine whether aircraft fly in a north or south flow pattern, with south flow occurring about 65% of the year. The document also notes that even aircraft following identical routes will not fly the exact same path, due to variations in pilot technique, weather, air traffic control, and aircraft performance.

This Sea-Tac International Airport brochure, prepared by the Port of Seattle in Summer 1998, compares the noise footprints of Stage II jets, Stage III jets, and general aviation/commuter aircraft to help residents understand the noise impacts of different aircraft types. It explains that Stage III aircraft are significantly quieter than Stage II aircraft, and that replacing older Stage II planes with newer Stage III models would meaningfully reduce noise levels in surrounding communities. The document also defines key noise measurement terminology, including DNL (Day-Night Average Sound Level), and notes that nighttime flights carry a 10-decibel penalty in noise accounting.

This Summer 1998 newsletter from the Seattle-Tacoma International Airport Noise Abatement Office covers the Noise Remedy/Home Sound Insulation Program, explaining how the program boundary was established using 65 DNL noise contours and noting that 6,375 of 10,000 eligible homes had been insulated by Q1 1998. It also includes a quarterly report on fleet noise compliance, flight pattern changes, and an update on the Part 150 Noise Study, which was set to be presented at a public open house on July 23, 1998. Additionally, the newsletter lists upcoming regional airshow events for summer 1998, including Seafair and the Blue Angels, along with associated noise complaint contact numbers.

This document compiles evidence alleging that the Port of Seattle violated Federal Grant Assurance C.6 and Washington State law RCW 53.54.020 in connection with its noise compatibility program at Sea-Tac Airport. It includes letters from elected officials, audit findings by Deloitte & Touche, and records showing the Port received over $100 million in federal funds for FAR Part 150 noise mitigation while allegedly failing to comply with the program's requirements. Supporting materials span 1990–1998 and involve Congress members, state legislators, the FAA, and the Washington State Auditor's Office.

Port Of Seattle response to public and agency comments on Army Corps of Engineers Public Notice Permit Reference No. 96-4-02325 for Master Plan Development Actions at Seattle-Tacoma International Airport. AR035118/AR035119. Addresses six major concerns: EPA/COE MOA wetland impact sequencing and compensatory mitigation; justification for out-of-watershed mitigation (Auburn wetland) for wildlife habitat; South Aviation Support Area

Port of Seattle Comment Binder B for Seattle-Tacoma International Airport Master Plan Update, containing letters submitted to the U.S. Army Corps of Engineers during the second public comment period (April 9–20, 1998) and comments to Washington State Department of Ecology during the entire public comment period (December 19, 1997–April 29, 1998). Includes a letter dated

A 1998 letter from Fisheries Consultants to the U.S. Army Corps of Engineers concludes that SeaTac Airport's proposed Third Runway will have an overall neutral effect on aquatic habitat and fish populations in Miller Creek. Minor benefits are expected from new storm flow detention facilities, which will reduce peak flood flows by 5–20%, and from a planned 100-foot-wide stream buffer created through residential buyouts along the creek. Adverse impacts are limited to the temporary disruption of a quarter-mile creek relocation and an approximate 8% reduction in late-summer low stream flows due to increased paved surfaces and wetland fill.

Comment Binder A compiled by Port of Seattle for Sea-Tac Airport (Seattle-Tacoma International Airport) third runway project, containing letters submitted to the U.S. Army Corps of Engineers during the initial comment period (December 19, 1997 to January 20, 1998) and comments from the joint Corps/Ecology public hearing held April 9, 1998. Includes a January 15,