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Infrastructure

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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
RR CSX Massachusetts Good 1915 111 1,050
SAND RIVER Michigan Fair 1915 111 50
PINE RUN CREEK Michigan Fair 1915 111 14,723
S BR KALAMAZOO RIVER Michigan Fair 1915 111 55
SHEBEON DRAIN Michigan Fair 1915 111 240
GRAND RIVER Michigan Poor 1915 111 15,940
BRAYTON CREEK Michigan Fair 1915 111 50
OX CREEK Michigan Fair 1915 111 50
BAY OF THUNDER LAKE Minnesota Fair 1915 111 44
STREAM Minnesota Fair 1915 111 38
S BR WILD RICE RIVER Minnesota Poor 1915 111 18
BASSETT CREEK Minnesota Fair 1915 111 8,226
BASSETT CREEK Minnesota Fair 1915 111 6,610
BASSETT CREEK Minnesota Fair 1915 111 3,969
STREAM Minnesota Fair 1915 111 90
LITTLE CANNON RIVER Minnesota Fair 1915 111 70
STREAM Minnesota Fair 1915 111 6
KANARANZI CREEK Minnesota Poor 1915 111 1
S BR S FK ROOT RIVER Minnesota Fair 1915 111 64
LAC QUI PARLE RIVER Minnesota Poor 1915 111 5
FLORIDA CREEK Minnesota Poor 1915 111 5
MIDTOWN GREENWAY Minnesota Fair 1915 111 786
MIDTOWN GREENWAY Minnesota Fair 1915 111 1,020
MIDTOWN GREENWAY Minnesota Poor 1915 111 3,772
MIDTOWN GREENWAY Minnesota Poor 1915 111 1,609
MIDTOWN GREENWAY Minnesota Poor 1915 111 1,544
MIDTOWN GREENWAY Minnesota Poor 1915 111 1,020
MIDTOWN GREENWAY Minnesota Fair 1915 111 1,102
BURWELL CREEK Mississippi Fair 1915 111 2,000
BRANCH Mississippi Fair 1915 111 520
CROOKED RVR Missouri Fair 1915 111 85
INDIAN CR Missouri Poor 1915 111 15
N WHITE OAK CR Missouri Fair 1915 111 50
N LINN CR Missouri Poor 1915 111 5
WHITEWATER RVR Missouri Poor 1915 111 35
BOEUF CR Missouri Poor 1915 111 100
DR DITCH TO MISS R Missouri Fair 1915 111 5
HANLEY HILLS CR Missouri Fair 1915 111 11,723
MUDDY CR Missouri Good 1915 111 100
PETER CR Missouri Fair 1915 111 30
TRIB N BLACKBIRD C Missouri Poor 1915 111 5
CROOKED RVR Missouri Fair 1915 111 35
N FABIUS RVR Missouri Poor 1915 111 35
LIT WYACONDA RVR Missouri Fair 1915 111 20
SMITH BR Missouri Poor 1915 111 5
BR OF SNI-A-BAR CR Missouri Good 1915 111 152
FLAT CR Missouri Poor 1915 111 30
FLAT CR Missouri Poor 1915 111 50
SALT FK Missouri Poor 1915 111 25
WOLFPEN CR Missouri Fair 1915 111 20

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