The Biden administration, leaders of four Columbia River Basin tribes and the governors of Oregon and Washington celebrated on Friday as they signed papers formally launching a $1 billion plan to help recover depleted salmon populations in the Pacific Northwest.

The plan, announced in December, stopped short of calling for the removal of four controversial dams on the Snake River, as some environmental groups and tribal leaders have urged. But officials said it would boost clean energy production and help offset hydropower, transportation and other benefits provided by the dams should Congress ever agree to breach them.

The plan brokered by the Biden administration pauses long-running litigation over federal dam operations and represents the most significant step yet toward eventually taking the four Snake River dams down. The plan will strengthen tribal clean energy projects and provide other benefits for tribes and other communities that depend on the Columbia Basin for agriculture, energy, recreation and transportation, the White House said.