King County Road Services - Sylvester Road Bridge Replacement Project

The City of Normandy Park received federal funding to replace the Sylvester Road Bridge on Sylvester Road S.W. with a new bridge in 2011. Construction on this project is underway and could last through winter. During this time, Sylvester Road S.W. is closed and traffic is being rerouted along a signed detour route that uses 14th Avenue S.W. and S.W. 160th Street (see map, 230KB .pdf).

Project status

On behalf of the City of Normandy Park, King County is providing construction updates via this website and e-mail notifications (sign up at right).

March 29, 2012 - Bridge is open to traffic as of today.

Completed:

  • Demolition of the old bridge
  • Construction of the substructure foundation for the new bridge
  • Installation of temporary shoring towers for girder placement
  • Erection of girders
  • Pouring concrete for deck
  • Post tensioning of girders
  • Installation of water line
  • Filling of approaches
  • Construction of bridge rails
  • Pouring and finishing of sidewalk
  • Construction of approach slabs
  • Paving of approach road
  • Completion of guardrails
  • Removal of temporary shoring towers

Still to be done:

  • Install impact attenuator
  • Restore slope
  • Planting
  • Final cleanup

Intermittent lane closures will be necessary as crews finish relocating Puget Sound Energy power lines and restore the slope.

Thank you very much for your patience with the inconveniences caused by this construction.

Project photos

March 29, 2012 — This view, looking south, shows the bridge open to traffic.
March 29, 2012 — This view, looking south, shows the bridge open to traffic.
Enlarged view, 438KB .jpg		 Feb. 18, 2012 - Building the traffic barrier.
Feb. 18, 2012 — Building the traffic barrier.
Enlarged view, 557KB .jpg

Feb. 6, 2012 — Workers install bars that will reinforce the traffic barrier.
Feb. 6, 2012 — Workers install bars that will reinforce the traffic barrier.
Enlarged view, 633KB .jpg 		Jan. 5, 2012 - Workers install tendons that will be used to tension the bridge posts.
Jan. 5, 2012 — Workers install tendons that will be used to tension the bridge posts.
Enlarged view, 490KB .jpg

Dec. 6, 2011 — Workers prepare to install forms for the bridge deck.
Dec. 6, 2011 — Workers prepare to install forms for the bridge deck.
Enlarged view, 560KB .jpg 		Nov. 21, 2011 — The bridge girders in place on the temporary shoring towers.
Nov. 21, 2011 — The bridge girders in place on the temporary shoring towers.
Enlarged view, 568KB .jpg

Oct. 31, 2011 — The contractor builds temporary shoring towers to support the bridge girders during construction.
Oct. 31, 2011 — The contractor builds temporary shoring towers to support the bridge girders during construction.
Enlarged view, 622KB .jpg 		Oct. 19, 2011 — Workers pour concrete for the shaft foundation cap.
Oct. 19, 2011 — Workers pour concrete for the shaft foundation cap.
Enlarged view, 544KB .jpg

Aug. 30, 2011 - Final cleanup after the old Sylvester Road bridge was removed
Aug. 30, 2011 - final cleanup after the old bridge was removed.
Enlarged view, 496KB .jpg 		Aug. 18, 2011 - Demolition of the old Sylvester Road bridge
Aug. 18, 2011 - Demolition of the old bridge.
Enlarged view, 532KB .jpg

Contact us

If you have questions or comments about this project, or would like to receive e-mail updates about it, please contact:

DeAnna Martin, Community Relations Planner
206-684-1142

Information from the Road Services Division's website is available to people with disabilities in alternate formats upon request by calling 206-263-6482 or 711 for the TTY relay service.

External link = External link

Related info

• Frequently-asked questions
• City of Normandy Park's Sylvester Road Bridge Replacement Project websiteexternal link

Sign up for updates

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June 2011 project mailer

Sylvester Road Bridge Replacement Project June 2011 mailer
Enlarged view, 314KB .pdf

Location map

Sylvester Road Bridge Replacement Project location map
Enlarged view, 230KB .pdf