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- Roads--Design and construction 26
- Civilian Conservation Corps (U.S.) 11
- Meetings 6
- Portraits, Group 6
- Forests and forestry 4
- Roads 3
- Tractors 2
- Coasts--Oregon 1
- Izaak Walton League of America 1
- Jetties 1
- Oregon Cavemen Inc. 1
- Perimeters (Boundaries) 1
- Portland Chamber of Commerce (Or.) 1
- Rivers--Oregon 1
- Sewage disposal plants 1
- Water--Pollution 1