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 |
|---|---|---|---|---|---|
| LEAK RUN | Pennsylvania | Fair | 1916 | 110 | 5,157 |
| BIG PUCKETA CREEK | Pennsylvania | Fair | 1916 | 110 | 440 |
| BIG SEWICKLEY CREEK | Pennsylvania | Fair | 1916 | 110 | 408 |
| TRIB TO ALLEGHENY RIVER | Pennsylvania | Fair | 1916 | 110 | 159 |
| RACCOON CREEK | Pennsylvania | Fair | 1916 | 110 | 50 |
| LAKE GORDON | Pennsylvania | Fair | 1916 | 110 | 159 |
| NORFOLK/SOUTHERN RR | Pennsylvania | Poor | 1916 | 110 | 7,121 |
| NORFOLK SOUTHERN | Pennsylvania | Fair | 1916 | 110 | 6,878 |
| SEPTA WEST TRENTON BR. | Pennsylvania | Poor | 1916 | 110 | 8,438 |
| LITTL CONNOQUENESSING CR | Pennsylvania | Poor | 1916 | 110 | 100 |
| MULLIGAN RUN | Pennsylvania | Fair | 1916 | 110 | 50 |
| B&P RAILROAD | Pennsylvania | Poor | 1916 | 110 | 50 |
| SCHUYLKILL RIVER | Pennsylvania | Fair | 1916 | 110 | 6,319 |
| BRANCH WHITE CLAY CREEK | Pennsylvania | Fair | 1916 | 110 | 1,211 |
| OFFICERS RUN | Pennsylvania | Fair | 1916 | 110 | 2,465 |
| RAILROAD WILMINGTON BR. | Pennsylvania | Poor | 1916 | 110 | 833 |
| BEAVER CREEK | Pennsylvania | Fair | 1916 | 110 | 1,979 |
| BEAVER CREEK | Pennsylvania | Good | 1916 | 110 | 391 |
| STONY RUN | Pennsylvania | Fair | 1916 | 110 | 1,235 |
| PIGEON CREEK | Pennsylvania | Fair | 1916 | 110 | 264 |
| EAST BRANCH CHESTER CRK. | Pennsylvania | Fair | 1916 | 110 | 2,300 |
| OVER SHENANGO RIVER N BR | Pennsylvania | Fair | 1916 | 110 | 3,887 |
| OVER MILL RUN | Pennsylvania | Fair | 1916 | 110 | 2,500 |
| OVER MILL RUN | Pennsylvania | Poor | 1916 | 110 | 1,500 |
| BRANCH NAAMANS CREEK | Pennsylvania | Poor | 1916 | 110 | 8,790 |
| LITTLE TOBY CREEK | Pennsylvania | Poor | 1916 | 110 | 50 |
| NORTH BRANCH BROWNS RUN | Pennsylvania | Good | 1916 | 110 | 598 |
| WHITETHORN RUN | Pennsylvania | Fair | 1916 | 110 | 30 |
| Mill Creek | Pennsylvania | Poor | 1916 | 110 | 817 |
| CONESTOGA RIVER | Pennsylvania | Poor | 1916 | 110 | 175 |
| TWO MILE RUN | Pennsylvania | Fair | 1916 | 110 | 100 |
| MOUNTAIN RUN CREEK | Pennsylvania | Poor | 1916 | 110 | 4,717 |
| POCONO CREEK | Pennsylvania | Good | 1916 | 110 | 1,474 |
| SHAMOKIN CREEK | Pennsylvania | Fair | 1916 | 110 | 1,600 |
| WHITES CREEK | Pennsylvania | Poor | 1916 | 110 | 25 |
| MILLER RUN | Pennsylvania | Fair | 1916 | 110 | 50 |
| ROARING RUN | Pennsylvania | Fair | 1916 | 110 | 50 |
| JENNINGS RUN | Pennsylvania | Fair | 1916 | 110 | 75 |
| ZIMMERMAN CREEK | Pennsylvania | Fair | 1916 | 110 | 40 |
| RAPID RUN | Pennsylvania | Fair | 1916 | 110 | 50 |
| PETERS CREEK | Pennsylvania | Fair | 1916 | 110 | 5,427 |
| PIKE RUN | Pennsylvania | Poor | 1916 | 110 | 1,392 |
| PIGEON CREEK | Pennsylvania | Good | 1916 | 110 | 100 |
| INDIAN CREEK | Pennsylvania | Poor | 1916 | 110 | 387 |
| BUTTERMILK CREEK | Pennsylvania | Fair | 1916 | 110 | 150 |
| SO BRANCH CODORUS CREEK | Pennsylvania | Fair | 1916 | 110 | 21 |
| FOX RUN | Pennsylvania | Fair | 1916 | 110 | 1,414 |
| FRANKFORD CREEK | Pennsylvania | Fair | 1916 | 110 | 10,849 |
| SEPTA (CHESTNUT HILL W) | Pennsylvania | Fair | 1916 | 110 | 13,160 |
| CONRAIL | Pennsylvania | Poor | 1916 | 110 | 3,200 |
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.