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Federal Highway Administration
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Washington, DC 20590
202-366-4000


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Bridge Program

National Bridge Inspection Program

FHWA requires inspections of all bridges carrying traffic on public roads to insure their safety and reliability. This program was initially mandated in the Federal-aid Highway Act of 1968, which led to the National Bridge Inspection Standards established in the Federal Register in 1971.

The NBIS (23 CFR 650, Subpart C) require States to:

Washington State Bridges

In Washington State there are 7,717 bridges carrying public roads that are subject to the Federal inspection requirements. 3159 of those structures are State owned, with 3906 bridges owned by local agencies, and 651 owned by other agencies (Federal, Tribal, Parks, etc.).

Other key statistics:

Pie chart of bridge conditions for the year 2000. Seventy-four percent   were not deficient. Nineteen perecent were structually deficient. Seven   percent were functionally obsolete.

Bar graph of bridges built by decade from 1900 to 2000. The lowest   number of bridges built were in 1910 (approximately 50). The highest   number of bridges were built in the 1980's (approximately 1700).

Page last modified on April 1, 2013.
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000