The first sheet piles are in!

With rip rap removal complete, we began installing the first sheet piles on the central waterfront last week. Sheet piles are thin, interlocking steel sheets that act like a retaining wall and protect Elliott Bay from construction of the new wall. Once the sheet piles have been installed, the work zone will be contained and crews can begin excavation.


What you can expect on the central waterfront next week:


  • Work will occur seven days a week. Weekday work will occur both day and night, with the noisiest work stopping each day by 10 pm and resuming at 7 am. Weekend work is planned as sheet pile installation continues. Ongoing under pier work is dependent on the tides and work hours will vary.
  • Continued mobilization of large equipment and materials in and out of the work zone.
  • Generators supporting systems to control groundwater are operational and running 24 hours a day.
  • The water treatment facility between Pike and Pine streets is operational and running 24 hours a day.
  • Sheet piles will be installed along the waterfront. Two teams are working to install sheet piles: one team is working from Pier 57 heading south while another team is working from the area between Piers 55 and 56 heading south. Noise and vibration may be noticeable during this activity. Work hours for sheet pile driving are daylight hours, seven days a week.
  • Ongoing excavation and demolition of the old seawall at Waterfront Park.
  • Jet grout activities will continue near Waterfront Park. Jet grout is a process by which a concrete mixture is injected into the ground and mixed with existing soils to form a solid foundation. Jet grout prep work, including coring and pre-drilling, will continue next week to prepare for the continued installation of jet grout columns.

Pedestrian and bicyclists 

  • The multi-use path along the west side of the Alaskan Way Viaduct is now open between Pike and Madison streets! Thank you for your patience as we prepared the central waterfront work zone for construction.


  • Utility work is planned for the intersections under the viaduct at Madison, Marion and Columbia streets next week. This work will occur overnight and traffic will be safely detoured around the work zone. Please follow the direction of flaggers and signage.  

What you can expect south of Colman Dock next week:

  • Working hours are six days a week, both day and night, with the noisiest work stopping each day by 10 pm and resuming at 7 am.
  • Ongoing concrete pours to prepare for backfilling behind the zee panels.

For questions about Seawall construction, send us an email at seawall@waterfrontseattle.org or call our 24-hour hotline at 206.618.8584.