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Number of Road Bridges by Owner

Notes: 

Some discrepancies exist between the total number of bridges reported in tables 1-5, 1-6, and 1-7 because of bridges not identified in one or more of the categories and other anomalies. Other state agency includes state parks, forests, reservations, and other state agencies. Local highway agency includes county, town or township, and city or municipal highway agencies. Other local agency includes local parks, forests, reservations, and other local agencies. Private includes highway bridges owned by railroads and other private entities. Details for each state may not add to totals because totals include bridges for which ownership is unknown.

Source: 

U.S. Department of Transportation, Federal Highway Administration, Office of Bridge Technology, National Bridge Inventory, Highway Bridge by Owner, available at www.fhwa.dot.gov/bridge/nbi.cfm as of June 2015.