Middlesex Sampling Plant, Process Building, 239 Mountain Avenue, Middlesex, Middlesex County, NJ
Significance: The process building was used between 1943-67 for sampling uranium, beryllium, and thorium ore for the Manhattan Engineer District/Atomic Energy Commission for use in the development of atomic weapons. This work was part of a top-secret nationwide fabricating effort during World War II to develop an atom bomb, and post-war, to create atomic weapons as part of President Harry S Truman's Cold War policy of military supremacy over the Soviet Union.
Survey number: HAER NJ-107-A
Building/structure dates: 1910 Initial Construction