New $1.72 billion ‘Gateway’ project would finally connect SR-509 to I-5

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SeaTacMapA proposed $1.72 billion project that would finally connect SR-509 to I-5 would “relieve traffic congestion and improve freight mobility,” according to supporters.

“Let’s finish what we started with the I-5/SR 509 corridor,” an announcement reads. “No other project is as valuable in terms of job creation, economic vitality, increased capacity, vehicle and freight mobility, safety, and environmental enhancements.”

The Gateway Project was formed by Rep. Judy Clibborn (D-Mercer Island) with the announcement of a potential new transportation construction and revenue package earlier this year. The SR-167, SR-509 and I-5 Puget Sound Gateway Project would relieve traffic congestion and improve freight mobility by completing the long-planned SR-167 and SR-509 corridor connections to I-5.

The new website for the SR 509/I-5 portion of the project – – was produced by the coalition, which includes the Port of Seattle, the cities of Burien, Des Moines, Federal Way, Kent, Normandy Park, SeaTac and Tukwila, area chambers, labor and business interests that will benefit from the improved access and new job creation.

The website includes an option for organizations, businesses and individuals interested to get involved and add their names to the list of supporters.

Construction could begin as early as 2016 if funding is received in the 2013 transportation budget. Cost for the Gateway is estimated at $1.72 billion over 10 years.

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16 Responses to “New $1.72 billion ‘Gateway’ project would finally connect SR-509 to I-5”
  1. Ethan says:

    Not really sure what the draw of this is all about… providing an alternate route to seattle that’s lined with traffic lights (between 1st ave bridge and what’s left of the viaduct) and a draw bridge doesn’t seem all that helpful to me.

    • Kevin says:

      It is more related to getting TRUCK traffic from the airport to I-5 to get to the Kent Warehouse districts

    • Charlie says:

      There is no bridge to cross if you take W. Marginal Way, staying West of the Duwamish.
      There is a great deal of Port of Seattle growth in the area and this project would keep traffic from this location from crossing the Spokane Street spans and the First Avenue South Bridge in order to get to I-5 Southbound.

      • Ethan says:

        I don’t follow. If you use W. Marginal then this wouldn’t help at all as that’s basically on I-5 already.

        Also, to get from the Port (water) to this you still have to use the 1st avenue bridge. The only minor benefit is that you don’t have to take the horrible multi stoplight clover leaf to get to WA-599.

        Now, getting from the airport to I-5 South might be easier, but I don’t see it being a lot of help from the water port.

  2. Chris says:

    Our private freeway to Seattle won’t be the same if it’s tied-in with I-5. It’s understandable though why they want to do it. It had always been the plan to do so, but simply never was finished.

    Hey, it’s been good while it lasted.

  3. Marty says:

    This would be bad for Burien, Normandy Park & Seatac. Everyone south of these neighborhoods would jump on 509 to get out of Seattle, causing longer commute times & more pollution in our communities. Just say NO!

    • May says:

      Marty–you are right. This project would run straight into 509. It is like you said..a bad Idea. I am also interested in who will be the construction company building it?

  4. Brett says:

    The funding package will require a 10 cents/gallon increase of gasoline tax! The SR 509 portion of this package is really for the Port of Seattle and their ambitions to double freight traffic at Sea-Tac airport by 2025 which will trigger a need for a 4th runway!

    Current plans don’t show on/off ramps at Sea-Tac but very recent plans did. Watch for the MORPH and staggering cost increases, traffic, noise and smog.

    Like living in an industrial zone? Just say no—-the third runway is bad enough! “The third runway will just be used for bad weather landings.”

    • Chris says:

      Uh, where exactly would you build a fourth runway? If that indeed was the plan, then that means SR 509 would have to be a tunnel, because a 4th runway would extend so far westward.

      After the 3rd runway construction, I highly doubt the port would EVER try and go for a 4th runway. Not going to happen.

      • Brett says:

        Riverton Heights to Glendale was the original plan for a 4th runway with an aircraft bridge over SR518 similar to the S188th tunnel. That would put it north and a mile east of runway one.

        Hope you are right: “not going to happen”. The new control tower was sited and built at the mid-way point. A preview of their future plans…

        Huge increases of air freight aircraft, the loudest and dirtiest, will trigger ever expanding needs for more and more and more concrete. That’s how it works.

    • shari says:

      I did just hear Sen King (co chair of Transportation) stress the importance of finishing 167 and 509 because thats so vital to the sustained competitiveness of our ports…he described it as a top priority for that reason. Didnt hear him mention another runway, but rather port ingress and egress.

      • Brett says:

        They’ll never mention a 4th runway until it’s too late, infrastructure in place and then…pow! . SR599 was supposed to be that ingress egress, barely used. We paid $millions for that already.

        SR167 should be completed, delink the SR509 project.

  5. Ben says:

    I thought the freight corridor to downtown was the SR599 / SR99 corridor from Tukwila to South Park. Better to invest in congestion reduction at 1st Ave S. Bridge and the Dwamish Industrial area instead of adding more regional traffic to SR 509 which is already regularly congested with local commuter and airport traffic.

  6. May says:

    You mjght recognize some names..

    Luis Moscoso (Introduced HB 1413 THE WARD SYSTEM) ..
    Dave Upthegrove …and

    The Gateway Project was formed by Rep. Judy Clibborn (D-Mercer Island)…

  7. Mary says:

    These lobbyists are the main people pushing this>

    Clare Gallagher
    Port of Seattle State Lobbyist
    [email protected]

    Doug Levy
    City of Kent Lobbyist
    [email protected]

    Carolyn Logue
    South Sound Chambers Legislative Coalition
    [email protected]

    Briahna Taylor
    City of SeaTac State Lobbyist
    [email protected]

  8. Debi Wagner says:

    Years ago when the plans for the third runway were dumped on us, there was a plan also by WSDOT for the 509 extension. Within the airport build-out plan was a congestion issue with all the additional passenger and cargo traffic heading south. Unfortunately, this created several predicted violations of the national air quality standards for the area around 188th which made it impossible for the FAA to authorize the third runway project. Deals were made, some projects were dropped from the proposal, figures magically changed to produce a positive result and voila, years later with no improvement in air quality, in fact, air that is sure to make people sick and die early of all types of illnesses including cancer, we get someone from Mercer Island saying give us more toxic emissions. Why should they care, they’re not the ones suffering.

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