Newton R. Mahon

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.

B. O. Hobbs

Helen Bailey

Bailey worked in the United States Engineer District Office.

Enzi DeRenzis

DeRenzis worked in the United States Engineer District Office.