What project established the nuclear complex where Washington State Route 24 turns north to cross the Columbia River?
Washington State Route 24:  Beginning at an interchange with Interstate 82 (I-82) in Yakima, the highway travels east into the Yakima highlands before turning north at the Hanford Site to cross the Columbia River on the Vernita Bridge. Hanford Site:  Established in 1943 as part of the Manhattan Project in Hanford, south-central Washington, the site was home to the B Reactor, the first full-scale plutonium production reactor in the world.
Manhattan Project