In June 1944, the Manhattan Project employed some 129,000 workers, of whom 84,500 were construction workers, 40,500 were plant operators and 1,800 were military personnel.
En xuño de 1944 o Proxecto Manhattan tiña ó redor de 129 000 traballadores empregados, dos que 84 500 eran traballadores da construción, 40 500 eran operadores de planta e 1 800 eran persoal militar.