Alki pump station project: Final months of work

We recently got a note from Jeff wondering about progress on the Alki pump station project, which has now been under construction for almost a year and a half. So we checked with the King County Wastewater Treatment Division folks, and Heidi Sowell sent an update – note the chance to ask your questions in person during Sunday’s “Celebrate Seattle Summer Streets” event (closing Alki to most traffic 9 am-5 pm that day). Here’s what Heidi sent:

Crews are completing the construction of the pump station. Much of the current work on the project is occurring below ground and improvements may not be as noticeable to those living, working and visiting the area.

… 53rd Avenue Pump Station Upgrade
In February 2008, construction began on upgrades to King County’s 53rd Avenue Pump Station in West Seattle. This underground wastewater facility, located on the west side of Alki Avenue Southwest at 53rd Avenue Southwest, is more than 50 years old and in need of repairs, new equipment and more underground space.

The 53rd Avenue Pump Station will remain underground but will be about three times as large. Current improvements to the Pump Station will bring the facility into compliance with current code and design requirements while also increasing reliability. The pump station will help manage combined stormwater and wastewater flows from nearby neighborhoods and will reduce overflows into Puget Sound.

Construction Milestones

* Utility and storm drain relocation – Spring 2008
* Force main installation – July 2008
* Sheet pile driving – August 2008
* Pump station excavation – Fall 2008
* Pump station construction – Winter 2008 through Summer 2009
* Testing of upgraded facility and property restoration – Fall 2009

Learn more at or visit us
at the Alki Seattle Summer Streets event this Sunday from 9 am – 2 pm (near the pump
station). Thank you for your continued patience through the 53rd Avenue Pump Station

6 Replies to "Alki pump station project: Final months of work"

  • Mike May 30, 2009 (11:10 am)

    I would like to more baout this near 2 year project. the link you supplied is not active. How do I find out about some original timelines and cost projections?

  • jmw May 30, 2009 (11:56 am)

    So when the county triples the size of the pump station beneath the Lowman Park grass we can expect a 2 year timeline? An update of that project would be great WSB.

  • Mike May 31, 2009 (1:46 am)

    2 years seems long but keep in mind you can’t just shut off these pipes while they work on them.

  • alki_2008 June 1, 2009 (1:05 pm)

    Also, this page (reachable through the link in above comment) is dated Feb 2008…and they say it’s expected to complete in Fall 2009. So, seems like they’re still on schedule?

    And I think the budgeted amount for this project was $3.3 million…but I’m not 100% certain.

  • WSB June 1, 2009 (1:26 pm)

    We dropped by the booth on Sunday – October is their expected completion date for the Alki pump station. Re: Lowman, we’re following up on that – they told us it’s “back on the table” so we’re finding out more about what that means … TR

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