William P. Hofmann

Edred B. Williams

C. W. Dickson

Dickson worked for Stone and Webster Engineering Corporation.

H. P. Graves

H. P. Graves worked in the United States Engineer District Office.

Franklin Matthias

Colonel Franklin Matthias (1908 – 1993) was the officer-in-charge at the Hanford site. Matthias, a civil engineer, had been a close associate of General Groves since the beginning of the Manhattan Project, and was asked to review sites in the West.