Seattle District Restores Flood Protection After Historic Pacific Northwest Flooding
In December 2025, a series of powerful atmospheric rivers brought unprecedented rainfall to the Pacific Northwest, causing catastrophic flooding, landslides, and significant infrastructure damage across Washington, Montana, and Idaho (DVIDS, 2026). Western Washington experienced over 10 inches of rain in some areas, leading to rapid river rises and widespread flooding. Major rivers such as the Nooksack, Skagit, Cedar, Green, and White overflowed, threatening levees and critical infrastructure. The U.S. Army Corps of Engineers (USACE), Seattle District, initiated a 24-hour emergency response to mitigate the immediate impacts. Since then, the district has been working to restore damaged flood protection systems under Public Law 84-99, which authorizes repairs to levees and other flood risk reduction structures. As of August 2026, 14 rehabilitation projects are underway, with some already completed, including the Skagit River Diking District 1 levee near Mount Vernon, Washington.