SR509

SR 509 Corridor Completion/I-5/South Access Road Revised Draft EIS Section 4(f) Evaluation
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CategoriesHistory, Key DocumentsTagsPort Of Seattle, SR509, WSDOT
2025-11-19
Puget Sound Gateway Program SR 509 Completion Project

WSDOT presentation on the Puget Sound Gateway Program, focusing on the SR 509 Completion Project. The program includes two projects (SR 167 and SR 509) to provide essential connections to the ports of Tacoma and Seattle, with various stages of construction progress.

TagsHighline Forum, Port Of Seattle, SR509, WSDOT
2024-11-14
SR-509 Stage 2 Open House

WSDOT is hosting an open house on SR-509 Big Picture School 440 S 186th Street, Burien WA 98168

CategoriesEventsTagsSR509, WSDOT
SR 509 Project Completion-Stage 2 Visualisation

https://wsdot.wa.gov/construction-planning/search-projects/sr-509-completion-project

TagsSR509
Tribes call for national ban on salmon-killing chemical in car tires

by John Ryan Three Northwest tribes have petitioned the federal government to ban a salmon-killing chemical found in tires and urban streams worldwide. As car and truck tires wear and leave behind skid marks and tire dust, the rubber stabilizer known as 6PPD turns into 6PPD-quinone (also called 6PPD-q), one of the most toxic substances

CategoriesFrom The WebTagsKUOW, SR509, Stormwater, Water Quality
SR509 Phase 1, Stage 2 NEPA Re-Evaluation 24th Ave to South 188th Street – New Expressway

South Access Road Section 4(f)

TagsSR509, WSDOT
Page 33 from SR-509-FEIS-ocr Alternative C2 (preferred)

TagsEnvironmental Impact Statement, SR509, WSDOT
The Fourth Runway

We’ve begun using the term “Fourth Runway” to describe two large projects (SR-509 and the Sustainable Airport Master Plan) as one system, which they are. The two projects have always been part of a regional plan begun over fifty years ago to meet the strategic goals of the Port Of Seattle and regional planners. The construction of SR-509 will affect the communities are great deal. But starting in 2027 the projects will also increase flight operations at least 33% and cargo operations by 300%.

CategoriesExplainersTags4th Runway, Fourth Runway, SAMP, SR509, Sustainable Airport Master Plan, WSDOT
Puget Sound Gateway program kicks off

Connecting SR 167 and SR 509 to I-5 Puget Sound Gateway program will help move freight faster. (Photo – Port of Tacoma) State and regional leaders celebrated the beginning of the Puget Sound Gateway Program this month. This multiyear program will complete SR 167 in Pierce County and SR 509 in King County. These new

CategoriesFrom The WebTagsPSRC, Puget Sound Regional Council, SR509
Construction starting on missing links in SR 167, SR 509

…In King County, SR 509, which currently ends at South 188th Street, will be extended to I-5. The extension will have two lanes in each direction. A new interchange will be built at S. 188th St. The Washington State Department of Transportation said extending 509 will serve as an alternative to I-5, SR 99 and

CategoriesFrom The WebTagsKIRO7, SR509

Upcoming Events

PSCAA Advisory Council Meeting
Add to CalendarMThursday May 14, 9:00am - 12:00pm
1904 3rd Avenue, Suite 105, Seattle, WA 98101

Call to Order – Land Acknowledgement 9:00 – 9:05 Land acknowledgement recognizing Coast Salish people and traditional lands I. Early Morning: Alignment & Assessment A. Approval of March 11, 2026 Minutes 9:05 – 9:30 B. Introductions and Setting Goals and Norms for Retreat 9:05 – 9:30 II. New Business A. Strategic Plan Third Annual Report
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KCIA Vision 2045 Open House
Add to CalendarMThursday May 14, 5:30pm - 7:30pm
KCIA Flight Service Station, 6526 Ellis Ave. S. Seattle, WA 98108

King County International Airport-Boeing Field is at a pivotal moment, developing comprehensive plans that will determine its operations through 2045. The airport's Vision 2045 Airport Plan and Part 150 Study represent crucial strategic initiatives to balance safe, efficient operations with evolving aviation demands and community needs.

Join airport officials on Thursday, May 14 (5:30-7:30 p.m.) at the KCIA Flight Service Station to discover the preferred alternative for the airport's future development. This isn't just another planning meeting—it's your opportunity to understand how proposed projects and improvements will directly impact aviation services, local operations, and surrounding communities.

The Vision 2045 plan incorporates extensive stakeholder feedback and addresses critical infrastructure needs for future demand. Meanwhile, the Part 150 Study focuses on noise compatibility programs, ensuring community concerns remain central to planning decisions.

With environmental analysis nearing completion and submissions to King County Council and the FAA approaching, this open house offers essential insights into decisions that will shape regional aviation for decades.

Visit KCIAplanning.com for updates.
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