Seventy years ago during World War II, the Hanford Engineering Works was built as part of the Manhattan Project, becoming the first full-scale plutonium enrichment facility in the world.

Its plutonium was used for the test of the world’s first atomic bomb at the Trinity Site at Los Alamos, NM, and the bomb detonated over Nagasaki, Japan.

Over the next six weeks, the National Archives at Seattle will be posting formerly classified images of life in this unique community during a crucial era in Washington State and American history.

Today’s images were posted on their Facebook page.

Source: Hanford Photographic Negatives, 1943-1945; DuPont Collection; Records of the Department of Energy (RG 434), National Archives.