John W. Willis

August “Gus” Knuth

August “Gus” Knuth was a millwright and carpenter who helped construct Chicago Pile-1. He was present on December 2, 1942 when the pile went critical in the first self-sustaining chain reaction in history.

J. Reichenback

Charles Wilfong

I. A. Butcher

I. A. Butcher worked for the Kellex Corporation at the K-25 Plant.