- Charles Lee McGuinness, Frederick Norville Ward, Geological Survey (U.S.). Water Resources Division. Boise District, Geological Survey (U.S.). Water Resources Division. Indianapolis District, Harold Lloyd James, Henry Vorhees Beck, Kenneth Allen MacKichan, R. E. Oltman, Carl Evans Dutton, Robert K. McCormack
· 1949
- Aleksandr Evgenʹevich Fersman, Allen Van Heyl, Geological Survey (U.S.). Water Resources Division. Louisville District, Geological Survey (U.S.). Water Resources Division. Portland District, George Walton Walker, Harold Edgar Thomas, Henry Vorhees Beck, Horace Maxson Babcock, Kenneth Knight Landes, Frank Newell Visher, Robert K. McCormack
· 1949
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