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In “Y-12: Local Treasure — National Resource,” a series of articles printed in the Oak Ridge Observer beginning in June 2007 and continuing into early March 2009, and more recently as part of the series “Oak Ridge Treasure, National Resource” published by The Oak Ridger, Y-12 Historian D. Ray Smith provides richly detailed stories about Y-12 evolving missions.

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 View highlights by decade since Y‑12's initial planning and wartime mission starting in 1942 through its current missions today. 

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.