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
N BR CHICAGO RIVER Illinois Poor 1916 110 4,600
UNION STATION RR TRK Illinois Good 1916 110 7,600
BUSH CREEK Illinois Fair 1916 110 25
CLAYPOOL DR DITCH Illinois Poor 1916 110 100
LOUIS CREEK Illinois Poor 1916 110 75
COON CREEK Illinois Poor 1916 110 25
COON CREEK Illinois Poor 1916 110 25
DRAINAGE DITCH Illinois Fair 1916 110 75
TRIB TO SPRING CR Illinois Fair 1916 110 50
TRIB POND GROVE CK Illinois Fair 1916 110 1,400
FURNACECREEK Illinois Fair 1916 110 50
HELLS BRANCH Illinois Poor 1916 110 25
MID FK N BR CHI RIV Illinois Fair 1916 110 2,650
INDIAN CREEK Illinois Fair 1916 110 200
MENDOTA CR Illinois Poor 1916 110 100
BRUSHY FORK Illinois Poor 1916 110 50
JOE CREEK Illinois Poor 1916 110 50
CREEK Illinois Fair 1916 110 20
PADDOCK CREEK Illinois Fair 1916 110 125
HORSE CRK. Illinois Poor 1916 110 20
TRIB TO SILVER CK Illinois Fair 1916 110 200
HURRICANE CR Illinois Fair 1916 110 25
FARGO RUN Illinois Poor 1916 110 75
HADLEY CR TRIBUTARY Illinois Fair 1916 110 25
Little Blue Creek Illinois Good 1916 110 50
STREAM Illinois Fair 1916 110 1,000
HORNEY BRANCH Illinois Fair 1916 110 150
W BR LITTLE WABASH R Illinois Poor 1916 110 475
FLAT BRANCH Illinois Fair 1916 110 50
STREAM Illinois Fair 1916 110 50
STREAM Illinois Fair 1916 110 50
BR CROOKED CR Illinois Fair 1916 110 25
NORTH CREEK Illinois Fair 1916 110 500
BR LITTLE CROOKED CR Illinois Fair 1916 110 50
BR GRAND POINT CR Illinois Fair 1916 110 50
JACKSON CREEK Illinois Good 1916 110 9,150
Middle Fork WILDCAT Cr Indiana Fair 1916 110 326
BR CONNELEY DITCH Indiana Poor 1916 110 158
LAUGHERY CREEK Indiana Fair 1916 110 100
VERNON FK MUSCATATUCK R Indiana Fair 1916 110 110
STONY CREEK Indiana Fair 1916 110 6,350
BIG BLUE RIVER Indiana Fair 1916 110 240
TRIB TO WHITE LICK CREEK Indiana Fair 1916 110 175
LITTLE KANKAKEE RIVER Indiana Good 1916 110 100
FALL CREEK Indiana Poor 1916 110 856
PLEASANT RUN Indiana Fair 1916 110 1,482
BEAN CREEK Indiana Poor 1916 110 3,550
STATE DITCH Indiana Fair 1916 110 233
LITTLE EAGLE CREEK Indiana Fair 1916 110 25,347
BEAVER LAKE DITCH Indiana Fair 1916 110 53

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.