Now that part of the relieving platform has been removed in the work zone adjacent to Waterfront Park, we plan to begin installing jet grout columns in the excavated area next week! Jet grout is a technique used for soil stabilization where grout is injected into the ground and mixed with existing soils to form a solid foundation. In this case, jet grout columns will serve as the foundation of the new seawall. To learn more about building the new seawall, check out our website!
Preparation continues in advance of jet grout installation near Waterfront Park
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 at Pine Street 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 has completed work in front of Pier 57 and continues to move south toward Pier 56, while another team has completed installation in front of Pier 55 and is moving south toward Pier 54. Noise and vibration may be noticeable during this activity. Work hours for sheet pile driving are daylight hours, seven days a week.
- Demolition and excavation of pavement to begin in the work zone west of the viaduct between University and Madison streets.
- Survey work of existing timber columns, coring, pre-dilling, and injection of jet grout will occur near Waterfront Park. Jet grout is a process by which grout is injected into the ground and mixed with existing soils to form a solid foundation.
- Utility work will continue at Columbia Street. 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 backfilling behind zee panels will take place.
- Sewer installation will take place at the Yesler driveway exit lanes at Colman Dock. Ferry traffic will exit from the Marion Street exit only. Ferry access will be maintained as it is today, by using the entrance just south of Madison Street. Work will occur between 9 pm and 5 am.
For questions about Seawall construction, send us an email at firstname.lastname@example.org or call our 24-hour hotline at 206.618.8584.