Ground Improvement

Location: Tacoma, WA

Project Partner: Manson Construction Co.

Challenge: Installation of in-water stone columns which were located in the active Blair Waterway

Overview: Condon-Johnson was contracted to install over 1,100 42-inch diameter stone columns for liquefaction mitigation at the Port of Tacoma.

Results: Condon-Johnson was able to successfully install the dry-bottom feed stone columns ahead of schedule and at a cost savings to the Owner. Installation of the stone columns in the Blair Waterway were met with several challenges ranging from tidal influence to previously driven wood pile obstructions to coordinating installation in an active shipping waterway.