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
SLICKAWAY RUN Ohio Good 1900 126 477
CLOVER LICK CREEK Ohio Poor 1900 126 771
TWELVEMILE CREEK Ohio Good 1900 126 1,000
COWAN CREEK Ohio Good 1900 126 638
SOUTH FORK LEES CREEK Ohio Good 1900 126 191
LYTLE CREEK Ohio Good 1900 126 100
MAHONING RIVER Ohio Good 1900 126 77
MIDDLE FORK LITTLE BEAVE Ohio Good 1900 126 96
NO NAME STREAM Ohio Good 1900 126 1,497
NO NAME Ohio Good 1900 126 221
SANDY CREEK Ohio Fair 1900 126 324
MAHONING RIVER Ohio Good 1900 126 298
NO NAME Ohio Good 1900 126 324
BRUSH CREEK Ohio Good 1900 126 351
SANDY BEAVER CANAL Ohio Fair 1900 126 209
NO NAME Ohio Fair 1900 126 324
WEST FORK LITTLE BEAVER Ohio Good 1900 126 325
WEST FORK LITTLE BEAVER Ohio Good 1900 126 209
STONE MILL RUN Ohio Fair 1900 126 653
NO NAME Ohio Good 1900 126 209
ELK RUN Ohio Good 1900 126 549
PENN RR Ohio Good 1900 126 566
MAHONING RIVER Ohio Good 1900 126 385
NO NAME Ohio Good 1900 126 401
CONSER RUN Ohio Good 1900 126 96
SANDY CREEK Ohio Good 1900 126 209
NO NAME Ohio Good 1900 126 291
WEST FORK LITTLE BEAVER Ohio Good 1900 126 92
NO NAME Ohio Good 1900 126 96
NORTH FORK YELLOW CREEK Ohio Good 1900 126 371
NO NAME Ohio Good 1900 126 105
YOUNGSTOWN & SOUTHERN Ohio Good 1900 126 119
MIDDLE FORK LITTLE BEAVE Ohio Good 1900 126 229
NO NAME (br of Sandy Cr) Ohio Fair 1900 126 451
LESLIE RUN Ohio Good 1900 126 200
MIDDLE FORK LITTLE BEAVE Ohio Poor 1900 126 160
MOHAWK CREEK Ohio Fair 1900 126 332
WHITE EYES CREEK Ohio Good 1900 126 485
LITTLE WATOMIKA CREEK Ohio Fair 1900 126 209
DOUGHTY CREEK Ohio Fair 1900 126 189
BEAVER RUN Ohio Fair 1900 126 209
DUTCH RUN Ohio Fair 1900 126 303
SYCAMORE CREEK BRANCH Ohio Fair 1900 126 155
OLENTANGY RIVER Ohio Poor 1900 126 1,295
NINE MILE CREEK Ohio Fair 1900 126 6,702
DEER LICK CREEK Ohio Poor 1900 126 768
NINE MILE CREEK Ohio Poor 1900 126 9,474
PRIVATE PROPERTY Ohio Fair 1900 126 1,949
TOWPATH TRAIL Ohio Fair 1900 126 3,176
DOAN BROOK 7-1 Ohio Good 1900 126 22,150

Historic Bridges by State

States ranked by number of bridges built before 1951 still in service.

StateHistoric BridgesOldest YearAvg 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.