Historic Bridges
94,376 bridges built before 1951 across the United States still in service today.
Bridges Built Before 1951
The United States has 94,376 bridges built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.
| Bridge | State | Condition | Year Built | Age (Years) | ADT |
|---|---|---|---|---|---|
| CHARITON CREEK | Iowa | Poor | 1900 | 126 | 34 |
| EAST LONG CREEK | Iowa | Poor | 1900 | 126 | 5 |
| BR LONG CREEK | Iowa | Fair | 1900 | 126 | 20 |
| SMALL CREEK | Iowa | Poor | 1900 | 126 | 40 |
| SMALL STREAM | Iowa | Poor | 1900 | 126 | 20 |
| SOUTH RIVER | Iowa | Poor | 1900 | 126 | 11 |
| LOCAL CREEK | Iowa | Fair | 1900 | 126 | 20 |
| SOUTH RIVER | Iowa | Poor | 1900 | 126 | 40 |
| STREAM | Iowa | Fair | 1900 | 126 | 123 |
| PLUM CREEK | Iowa | Poor | 1900 | 126 | 49 |
| CARLAN CR | Iowa | Poor | 1900 | 126 | 21 |
| STREAM | Iowa | Poor | 1900 | 126 | 11 |
| STREAM | Iowa | Fair | 1900 | 126 | 15 |
| ROBERTS CREEK | Iowa | Fair | 1900 | 126 | 98 |
| UNION CREEK | Iowa | Poor | 1900 | 126 | 78 |
| HOCKETT CREEK | Iowa | Fair | 1900 | 126 | 21 |
| SMALL STREAM | Iowa | Fair | 1900 | 126 | 11 |
| MOSQUITO CREEK | Iowa | Poor | 1900 | 126 | 21 |
| CREEK | Iowa | Poor | 1900 | 126 | 21 |
| ELK CREEK | Iowa | Poor | 1900 | 126 | 40 |
| SAND CREEK | Iowa | Poor | 1900 | 126 | 11 |
| SMALL STREAM | Iowa | Fair | 1900 | 126 | 88 |
| KNOTTY CREEK | Iowa | Fair | 1900 | 126 | 26 |
| STREAM | Iowa | Good | 1900 | 126 | 91 |
| PRAIRIE CREEK | Iowa | Poor | 1900 | 126 | 11 |
| SMALL STREAM | Iowa | Fair | 1900 | 126 | 40 |
| CREEK | Iowa | Fair | 1900 | 126 | 49 |
| CREEK | Iowa | Fair | 1900 | 126 | 70 |
| CREEK | Iowa | Fair | 1900 | 126 | 5 |
| WINNEBAGO RIVER | Iowa | Poor | 1900 | 126 | 59 |
| WINNEBAGO RIVER | Iowa | Fair | 1900 | 126 | 697 |
| LITTLE CEDAR | Iowa | Poor | 1900 | 126 | 26 |
| FLOOD CREEK | Iowa | Poor | 1900 | 126 | 49 |
| CREEK | Iowa | Fair | 1900 | 126 | 39 |
| WALNUT CREEK | Iowa | Poor | 1900 | 126 | 21 |
| BRUSH CREEK | Iowa | Poor | 1900 | 126 | 41 |
| BUTTRICKS CREEK | Iowa | Poor | 1900 | 126 | 10 |
| BLACK HAWK CREEK | Iowa | Fair | 1900 | 126 | 354 |
| BEAR CREEK | Iowa | Fair | 1900 | 126 | 59 |
| CREEK | Iowa | Poor | 1900 | 126 | 373 |
| TIPTON CREEK | Iowa | Poor | 1900 | 126 | 20 |
| SOUTH FORK IOWA RIVER | Iowa | Poor | 1900 | 126 | 44 |
| TIPTON CREEK | Iowa | Poor | 1900 | 126 | 334 |
| TIPTON CREEK | Iowa | Fair | 1900 | 126 | 25 |
| DD | Iowa | Poor | 1900 | 126 | 41 |
| KEG CREEK | Iowa | Poor | 1900 | 126 | 11 |
| HARRIS GROVE CREEK | Iowa | Fair | 1900 | 126 | 379 |
| HONEY CREEK | Iowa | Fair | 1900 | 126 | 5 |
| BOYER RIVER | Iowa | Poor | 1900 | 126 | 123 |
| HOG CREEK | Iowa | Fair | 1900 | 126 | 71 |
Historic Bridges by State
States ranked by number of bridges built before 1951 still in service.
| State | Historic Bridges | Oldest Year | Avg Age |
|---|---|---|---|
| Texas | 8,191 | 1900 | 89 yrs |
| Pennsylvania | 6,062 | 1697 | 99 yrs |
| Kansas | 5,656 | 1870 | 93 yrs |
| Oklahoma | 5,554 | 1900 | 89 yrs |
| Missouri | 4,522 | 1874 | 96 yrs |
| California | 4,414 | 1860 | 91 yrs |
| New York | 3,831 | 1800 | 96 yrs |
| Ohio | 3,386 | 1828 | 101 yrs |
| Nebraska | 3,270 | 1888 | 91 yrs |
| Illinois | 3,065 | 1863 | 99 yrs |
| Iowa | 3,036 | 1876 | 98 yrs |
| Tennessee | 2,857 | 1841 | 89 yrs |
| Alabama | 2,703 | 1800 | 90 yrs |
| Indiana | 2,682 | 1838 | 98 yrs |
| Virginia | 2,504 | 1820 | 92 yrs |
| Kentucky | 2,241 | 1835 | 89 yrs |
| Arkansas | 1,932 | 1860 | 89 yrs |
| Georgia | 1,832 | 1872 | 88 yrs |
| New Jersey | 1,814 | 1792 | 99 yrs |
| Michigan | 1,528 | 1867 | 94 yrs |
| Massachusetts | 1,481 | 1764 | 107 yrs |
| Wisconsin | 1,333 | 1887 | 92 yrs |
| South Carolina | 1,282 | 1910 | 89 yrs |
| West Virginia | 1,245 | 1817 | 96 yrs |
| North Carolina | 1,203 | 1900 | 89 yrs |
| Arizona | 1,189 | 1900 | 90 yrs |
| Washington | 1,188 | 1900 | 92 yrs |
| South Dakota | 1,118 | 1900 | 92 yrs |
| Minnesota | 1,035 | 1884 | 94 yrs |
| Vermont | 987 | 1824 | 99 yrs |
| Maryland | 968 | 1809 | 99 yrs |
| Mississippi | 908 | 1900 | 87 yrs |
| Connecticut | 860 | 1832 | 96 yrs |
| Colorado | 857 | 1887 | 89 yrs |
| Oregon | 790 | 1899 | 92 yrs |
| New Mexico | 719 | 1908 | 87 yrs |
| New Hampshire | 716 | 1832 | 97 yrs |
| Florida | 707 | 1900 | 87 yrs |
| North Dakota | 685 | 1885 | 91 yrs |
| Montana | 662 | 1881 | 90 yrs |
| Maine | 630 | 1854 | 92 yrs |
| Louisiana | 614 | 1908 | 87 yrs |
| Puerto Rico | 463 | 1842 | 95 yrs |
| Hawaii | 386 | 1900 | 95 yrs |
| Idaho | 354 | 1908 | 90 yrs |
| Utah | 217 | 1905 | 88 yrs |
| Wyoming | 191 | 1908 | 88 yrs |
| Rhode Island | 179 | 1810 | 107 yrs |
| Delaware | 122 | 1839 | 99 yrs |
| Nevada | 89 | 1900 | 89 yrs |
| District of Columbia | 81 | 1831 | 94 yrs |
| Alaska | 37 | 1910 | 86 yrs |
About Historic Bridge Data
Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.