Figure 3: Bridges by Year Built

Figure 3: Bridges by Year Built

As of December 2006

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Age 0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85-89 90-94 95-100 >100
Structurally Deficient 0 0 816 1,246 1,460 2,014 3,456 5,129 6,184 7,447 5,450 5,553 1,783 7,130 6,546 6,049 2,794 2,995 1,718 2,053 3,871
Functionally Obsolete 0 0 3,337 4,134 3,344 3,082 4,461 6,985 9,889 9,858 6,763 5,155 1,348 4,786 4,844 4,386 2,322 1,617 888 804 2,174
No Deficiences 25,554 37,954 35,641 38,020 34,643 31,671 34,946 39,799 39,245 33,334 20,586 15,453 4,045 15,070 13,034 11,243 4,136 2,562 1,106 1,022 3,873
Total 25,554 37,954 39,794 43,400 39,447 36,767 42,863 51,913 55,318 50,639 32,799 26,161 7,176 26,986 24,424 21,678 9,252 7,174 3,712 3,879 9,918

NOTE: Bridges that are both structurally deficient and fuctionally obsolete are classified as structurally deficient. Numbers include the 50 U.S. States, the District of Columbia, and Puerto Rico

SOURCE: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory, Bridge by Year Built, 2006, available at http://www.fhwa.dot.gov/bridge/structyr.htm as of Aug. 8, 2007