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Figure 3: Bridges by Year Built
As of December 2006
Excel | CSV | Graphic Version
| 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
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