Northwest Energy Security Act

This bill requires federal agencies managing the Federal Columbia River Power System (FCRPS) to operate it according to the 2020 environmental review's "reasonable and prudent alternative." It allows limited changes to that review only for public safety, grid reliability, or if specific requirements are no longer needed, while prohibiting any new restrictions on hydroelectric power generation or Snake River navigation in Washington, Oregon, or Idaho without new federal law. The bill preserves routine operations and maintenance but mandates that structural changes or studies affecting power generation or navigation must be explicitly authorized by future legislation. It directly affects how federal agencies manage dams and river access across the Pacific Northwest.