Subject
- Earthmoving machinery10
- Flagpoles10
- Park rangers9
- Indians of North America8
- Parking lots8
- Buildings6
- Construction workers6
- Jetties6
- Signs and signboards6
- Trees6
- Truck-mounted cranes6
- Flags5
- Gates5
- Military museums5
- Wooden beams5
- American Revolution Bicentennial, 19764
- Concrete--Cracking4
- Demolition derbies4
- Dredges4
- Historical reenactments4