M. C. Wiest has been on the payroll for 74 years … just one year shy of the plant’s 75 years of existence.
Greeting a dignitary
View highlights by decade since Y‑12's initial planning and wartime mission starting in 1942 through its current missions today. Click a decade below to show its highlights. Click again to hide.
The Manhattan Project web pages are designed to disseminate information and documentation on the Manhattan Project to a broad audience including scholars, students, and the general public.
On Feb. 18, 1943, in the midst of World War II, work began on the first production building at Y‑12.
Building 9731 was the first building completed at Y-12.
A sequel documentary film to Secret City: The War Years.