State of US Public Infrastructure (2009, Society of Civil Engineers)
- Aviation D
- Bridges C
- Dams D
- Drinking Water D-
- Energy D+
- Hazardous Waste D
- Inland Waterways D-
- Levees D-
- Public Parks and Recreation C-
- Rail C-
- Roads D-
- Schools D
- Solid Waste C+
- Transit D
- Wastewater D
Source: American Society of Civil Engineers
