U.S. Department of Transportation, Federal Aviation Administration. Report to Congress: National Plan of Integrated Airports (NPIAS) – 2019-2023. 2019.


U.S. Department of Transportation, Federal Highway Administration, Office of Bridge Technology. National Bridge Inventory 2017, Deficient Bridges by State and Highway System.


Association of State Dam Safety Officials. Calendar Year 2017 Data from 2018 State Dam Safety Program Performance Questionnaire. 2019.

U.S. Army Corps of Engineers. Calendar Year 2018 Data from 2018 National Inventory of Dams. 2019.

Drinking Water

U.S. Environmental Protection Agency. Drinking Water Infrastructure Needs Survey and Assessment, 2015. 2018.


U.S. Energy Information Administration. State Energy Data System (SEDS): 1960-2014. 2016.

Hazardous Waste

U.S. Environmental Protection Agency. Final National Priorities List (NPL) Sites - by State. 2019.

Inland Waterways

U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics. State Transportation Statistics 2015. Table 1-16: Inland Waterway Mileage: 2013. 2015.


U.S. Federal Emergency Management Agency. Midterm Levee Inventory. 2017.

U.S. Army Corps of Engineers. National Levee Database. 2017.


U.S. Army Corps of Engineers, Navigation Data Center. The U.S. Waterway System – 2014 Transportation Facts and Information. 2015.

Public Parks

U.S. National Park Service, Land and Water Conservation Fund State Assistance Program. 2012 Annual Report. 2013.


American Association of Railroads, Data Center, Railroads and States, 2017.


U.S. Department of Transportation, Federal Highway Administration. Highway Statistics 2017, Table HM-10: Highway Statistics 2017, Public Road Length – 2017. 2019.

TRIP. State Information and Reports: 2017. 2019. Road condition information from TRIP is based on data submitted by state Departments of Transportation to the Federal Highway Administration, using the International Roughness Index. State DOTs may also have their own internal pavement management systems for the roads and highways that they maintain. As a result, the data may not be identical but should be viewed as complimentary.


21st Century School Fund, Inc., U.S. Green Building Council, Inc., and the National Council on School Facilities. State of Our Schools: America’s K–12 Facilities. 2016.


U.S. Department of Transportation, Federal Transit Administration. National Transit Database, 2017 Service.


U.S. Environmental Protection Agency. Clean Watershed Needs Survey 2012: Report to Congress. 2016.