Hanford worker barracks in 1943 totaled 110 for white men, 21 for black men; 57 barracks for white women, and seven for black women. Kennewick was a sundown town with curfews for Black people, most of whom had moved to work construction on the Hanford project coming from the South. Workers on site lived in segregated quarters, had their own mess halls and recreation areas. They all built three nuclear reactors and three plutonium plants that operated until the 1960s.