Preparations underway for Swinomish dredging program

Dredging work on the 11-mile Swinomish Navigation Channel is set to begin the week of September 9, the U.S. Army Corps of Engineers said.

USACE will oversee the marine safety and access improvement project, being performed by contractor American Construction Co. Inc., of Tacoma, Wash.

Mechanical clamshell dredging is expected to start in the south entrance of the Swinomish Channel.

According to USACE, dredging work will run 24 hours, six days/week with all in-water work to be completed no later than February 15, 2025.

Dredging is set to occur in the south entrance, the Hole-in-the Wall and Rainbow Bridge areas and the north entrance, to remove approximately 150,000 cubic yards of accumulated sediment.

The material will be placed at the Rosario Strait open-water disposal site.