Kuongorora kwakaitwa munaNovember 1942 kwakaratidza kuti huwandu hwakakwana hweuranium hwakanga huripo kuti hugutse zvido zveprojekti. Nichols akaronga neDhipatimendi reHurumende kuti kutengeswa kwekutengeswa kwekutengeswa kuendeswe kune uranium oxide uye vakataurirana kuti vatenge matani 1,200 (1,100 t) emvura yakachena yeuranium kubva kuBelgian Congo iyo yakanga yakachengetwa muchitoro paStaten Island uye yakasara yemigodhi yemigodhi yakachengetwa muplutonium, uye, muchimiro chayo chakasimbiswa, mubhomba reatomu pachayo. Paive nemana anozivikanwa makuru deposits euranium muna 1940: muColorado, kuchamhembe kweCanada, muJoachimsthal muCzechoslovakia, uye muBelgian Congo. Zvese kunze kwaJoachimsthal zvaive mumaoko akabatana. Ongororo yaNovember 1942 yakaratidza kuti huwandu hwakakwana hweuranium hwaivapo kuzadzisa zvido zveprojekti.
Muna 1942