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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
BROWN DITCH Indiana Fair 1900 126 106
FRICK DITCH Indiana Fair 1900 126 25
LONGPOND AND WHITE RIVER Indiana Poor 1900 126 —
MARIAH CREEK Indiana Fair 1900 126 130
KANKAKEE RIVER Indiana Poor 1900 126 136
WEST BOGGS CREEK Indiana Fair 1900 126 63
BEAVER CREEK Indiana Fair 1900 126 250
HAW CREEK Indiana Fair 1900 126 63
DEER CREEK Indiana Fair 1900 126 250
HONEY CREEK Indiana Fair 1900 126 275
STEPHENS CREEK Indiana Fair 1900 126 111
THOMPSON DITCH Indiana Fair 1900 126 145
BRANCH OF WILLOW CREEK Indiana Fair 1900 126 200
LOST RIVER Indiana Fair 1900 126 135
GROUNDHOG Branch Indiana Fair 1900 126 181
N Branch OTTER Creek Indiana Poor 1900 126 61
Branch of RACCOON Creek Indiana Fair 1900 126 63
WILLIAMS Creek Indiana Poor 1900 126 737
N Branch OTTER Creek Indiana Poor 1900 126 103
ROCKY Fork Creek Indiana Poor 1900 126 39
CAT Creek Indiana Poor 1900 126 52
East Fork RUSH Creek Indiana Poor 1900 126 63
NORTH FORK BIG GRAHAM CK Indiana Poor 1900 126 150
TRIB TO LAUGHERY CREEK Indiana Fair 1900 126 150
RIPLEY CREEK Indiana Fair 1900 126 325
FLATROCK RIVER Indiana Fair 1900 126 444
BEN DAVIS CREEK Indiana Poor 1900 126 100
BRANCH OF FLATROCK RIVER Indiana Fair 1900 126 950
LITTLE BLUE RIVER Indiana Fair 1900 126 250
CONNS CREEK Indiana Fair 1900 126 100
BR LITTLE FLATROCK RIVER Indiana Poor 1900 126 450
LITTLE FLATROCK RIVER Indiana Fair 1900 126 250
N BRANCH OF CLIFTY CREEK Indiana Fair 1900 126 100
LICK CREEK Indiana Poor 1900 126 550
ST. JOSEPH River Indiana Fair 1900 126 4,999
FLATROCK RIVER Indiana Poor 1900 126 175
DEER CREEK Indiana Fair 1900 126 800
Redwood Creek Indiana Fair 1900 126 100
MIDDLE FORK CRK TRIB Indiana Fair 1900 126 5
DRAINAGE Iowa Poor 1900 126 232
DIVISION CREEK Iowa Fair 1900 126 3,776
DIVISION CREEK Iowa Fair 1900 126 555
DRAINAGE Iowa Fair 1900 126 95
LATERAL #77 DD #23 Iowa Fair 1900 126 2,081
S BR DRY RUN Iowa Poor 1900 126 1,049
RAILROAD CREEK Iowa Poor 1900 126 472
RAILROAD CREEK Iowa Poor 1900 126 377
RAILROAD CREEK Iowa Poor 1900 126 699
RAILROAD CREEK Iowa Poor 1900 126 803
DRAINAGE Iowa Poor 1900 126 1,073

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.

All Bridges Poor Condition Scour Critical Bridge Stats