populated areas, and a site on the Columbia River, codenamed Site W, was chosen. The federal government acquired the land under its war powers authority and relocated some 1,500 nearby residents. The acquisition was one of the largest in US history. Disputes arose with farmers over the value of the land and compensation for crops that had already been planted. The acquisition was not completed before the Manhattan Project ended in December 1946.

Construction commenced in March 1943 on a massive