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Columbia River Basin Water Management

This is the home page for the Columbia Basin Water Management Division, Northwestern Division, U.S. Army Corps of Engineers. We are responsible for the Corps' river and reservoir regulation activities in the Columbia River Basin. Please click the icons on the map to learn more about the various projects in the Columbia Basin.

Columbia River

External Links

Basin Map

Real-Time Flood Risk Management Operations Under the Columbia River Treaty

For the first 60 years of the Columbia River Treaty (Treaty) the United States paid up front for a preplanned amount of FRM storage in Canadian reservoirs. As of September 16, 2024, the operations under the Treaty for that preplanned space in Canada are no longer in force. The United States can continue accessing storage space in Canada for FRM after September 2024, but the access will look different than the first 60 years of the Treaty. The U.S. Army Corps of Engineers and the Bureau of Reclamation must continue operating and maintaining federal projects to meet all Congressionally authorized responsibilities. The U.S. Government is prepared to, and if needed, will implement real-time flood risk management (FRM) operations. 

Until a new Treaty regime enters into force, the United States and Canada will be in an interim period, prompting the need for a new operating plan for FRM. USACE has worked with Canada to secure the 3.6 MAF of preplanned FRM storage for 2025.

The 2025 planned operations include Canada providing 3.6 MAF of preplanned FRM storage at Hugh Keenleyside Dam, which is consistent with the July agreement in principle. If U.S. FRM reservoirs and the 3.6 MAF of preplanned space in Canada are insufficient to address U.S. flooding, the U.S. will exercise its right to “call” Canada for additional space under the Columbia River Treaty.

USACE and Reclamation explained the potential changes to river flows and reservoir storage under this new dynamic during virtual public information sessions Dec. 4 & 5, 2024. 

December 5, 2024 virtual public info session:

Columbia River Basin News and Features

Corps begins expanded navigation lock times for recreational boaters
Portland District
5/15/2025
Beginning today, recreational boaters navigating the three lower Columbia River dams—Bonneville, The Dalles, and John Day— will have expanded access to pass through the navigation locks...
As temps rise, officials implore recreators wear simple life-saving device
Northwestern Division
5/6/2025
When the Pacific Northwest sees increasing outdoor temperatures, many people flock to their favorite lakes and streams to cool off. Tragically, this also leads to avoidable drownings and...
Agencies extend comment period for Columbia River System environmental review
Northwestern Division
5/1/2025
The U.S. Army Corps of Engineers (USACE) and the Bureau of Reclamation (Reclamation), or co-lead agencies, are extending the public comment period for the Columbia River System Operations Supplemental...
Agencies push Columbia River environmental review
Northwestern Division
4/4/2025
The U.S. Army Corps of Engineers (USACE) and Bureau of Reclamation (Reclamation), or co-lead agencies, are pushing back virtual public scoping meetings they previously scheduled for the week of April...
Agencies extend Columbia River environmental review, delay public meetings
Northwestern Division
2/6/2025
Two federal agencies are extending the public scoping period for the Columbia River System Operations Supplemental Environmental Impact Statement (SEIS.) The U.S. Army Corps of Engineers (USACE) and...