Navigation Section

The Navigation Section supports navigation by maintaining channels and other structural features for safe navigation in the Puget Sound region and on the Washington coast.  Maintaining channels requires keeping them at serviceable and reliable depths and widths by dredging and other means.  Maintaining also means removing navigation hazards and underwater obstructions. 

"The role of the U.S. Army Corps of Engineers with respect to navigation is to provide safe, reliable, and efficient waterborne transportation systems (channels, harbors, and waterways) for movement of commerce, national security needs and recreation." (USACE Engineering Regulation 1105-2-100)

Contact Us

Chief, Navigation Section
(206) 764-6908   
Chief, Waterway Maintenance Unit
(206) 764-3429   
Seattle District
Navigation Section
4735 East Marginal Way S.
Seattle, WA 98134-2385


Current Navigation Projects



Project Description Construction Dates (or anticipated dates) Construction Type Quantity (Cubic Yards or Linear Feet)
Grays Harbor Inner Harbor Maintenance Dredging


Dredging - Clamshell 2,500,000 CY
Everett/Snohomish River O&M River Dredging 11/8/23 - 02/14/24 Dredging Hydraulic 

105,000 CY

Duwamish O&M Dredging 12/01/23 - 01/15/24 Dredging Clamshell 65,000 CY