The Columbia River flows downstream of John Day Dam, near Rufus, Oregon, Feb. 26, 2025. The U.S. Army Corps of Engineers (USACE) operates and maintains John Day Dam. It is also part of the Columbia River System, which is a large and complex system with variable stream flows and weather patterns. Fourteen federal projects (dams) in Idaho, Montana, Oregon and Washington make up the system. USACE and the Bureau of Reclamation are pushing back virtual public scoping meetings they previously scheduled for the week of April 7, 2025, for a Supplemental Environmental Impact Statement (SEIS) for the system. The agencies will also extend the scoping period.