This feature class contains the case area boundary for U. S. District Court Injunction No. C70-9213, Subproceeding No. 01-1, the U.S. versus Washington State (US v. WA). In 2001, 21 western Washington treaty tribes filed suit in U.S. District Court alleging that the existence of State-owned barrier culverts under roads were a violation of treaty rights. On March 29, 2013, U.S. District Court Judge Martinez agreed with the tribes and issued a permanent injunction for the state to accelerate barrier correction on salmon and steelhead streams within the area of the state covered by the Stevens Treaties. The case area is comprised of Water Resource Inventory Areas 1 to 23.