Russell R. Wolff

Hannah Grovsnor

Grovsnor worked in the United States Engineer District Office.

E.E. Riggin

Robley Johnson

Robley "Rob" Johnson arrived at Hanford on May 2, 1943, at the age of 35. He was one of the first repersentatives of the DuPont Company on the scene.

Mary E. Parrish

Mary E. Parrish was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.