Figure 3-3 Condition of U.S. Bridges by Age Group: 2013
| Years Old (as of 12/31/2013) | All years | |||||
|---|---|---|---|---|---|---|
| 0-24 | 25-49 | 50-74 | 75-99 | >99 | ||
| Total bridges | 175,702 | 215,605 | 140,696 | 64,083 | 11,663 | 607,749 |
| Total deficient bridges | ||||||
| Number | 18,680 | 41,231 | 49,646 | 30,445 | 7,867 | 147,869 |
| Percent | 10.6 | 19.1 | 35.3 | 47.5 | 67.5 | 24.30% |
| Structurally deficient | ||||||
| Number | 2,576 | 16,200 | 22,491 | 17,388 | 4,866 | 63,521 |
| Percent | 1.5 | 7.5 | 16 | 27.1 | 41.7 | 10.50% |
| Functionally obsolete | ||||||
| Number | 16,104 | 25,031 | 27,155 | 13,057 | 3,001 | 84,348 |
| Percent | 9.2 | 11.6 | 19.3 | 20.4 | 25.7 | 13.90% |
NOTES: Excludes 39 bridges with no recorded age. Bridges with a Year Built or Year Reconstructed within the past 10 years will not be assigned a deficient status. Therefore, when referring to the deficiency being calculated not using the 10-year rule, the status will be calculated without taking into consideration the year built or the year reconstructed. U.S. totals include the 50 states, the District of Columbia, and Puerto Rico. Table includes: Rural–Interstate, principal arterial, minor arterial, major collector, minor collector and local roads; Urban–Interstate, other freeways or expressways, other principal arterial, minor arterial, collector, and local roads.
SOURCE: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory. Available at https://www.fhwa.dot.gov/bridge/nbi.cfm as of June 2015.