The State of Washington has violated Tribes' off-reservation fishing rights by building and maintaining culverts under State roads that harm fish habitat and reduce the production of fish. Because (1) currently there is not enough harvestable salmon available to ensure the Tribes a moderate living, (2) the State’s culverts block roughly a thousand miles of streams suitable for salmon habitat, and (3) replacing or modifying those culverts (structures built to allow streams to flow under roads) to allow fish passage would produce several hundred thousand additional mature salmon each year, the State was ordered to identify all state-owned barrier culverts and ensure those culverts allow fish passage (by differentiated deadlines depending on several ecological and economic considerations).