Under the terms of the treaty, Canada controls the flow of the northwest’s largest river from its headwaters in British Columbia, ensuring enough water is sent downstream to meet U.S.

The nations were trying to finalize updates to the 61-year-old Columbia River Treaty governing shared, cross-border water and ...

The U.S. has paused negotiations with Canada on a keystone management plan that governs flood control, water supply and ...

Seven states are trying to figure out how to share the shrinking Colorado River before a 2026 deadline. And as negotiations continue, the issue appears to be inching closer to litigation.

The Lower Basin states of California, Arizona and Nevada are asking for a fresh look at proposals for sharing the shrinking ...

Trump’s early actions, including ordering the US Army Corps of Engineers to open two California dams, have led to concerns ...