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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
COTTONWOOD RIVER Kansas Poor 1916 110 50
LITTLE CHERRY CREEK Kansas Fair 1916 110 25
SPRING RIVER-OVERFLOW Kansas Poor 1916 110 5
TRIB. TO SAC CREEK Kansas Fair 1916 110 25
TRIB. TO HERMES CREEK Kansas Fair 1916 110 15
CLAYMORE CREEK Kansas Good 1916 110 50
NEOSHO RIVER Kansas Fair 1916 110 30
VASSAR CREEK Kansas Fair 1916 110 100
THREEMILE CREEK Kansas Fair 1916 110 13,487
AUSTIN STREAM OVERFLOW Maine Poor 1916 110 20
STROUDWATER RIVER Maine Fair 1916 110 11,740
CARRABASSET RIVER Maine Poor 1916 110 2,515
SNIB HOLLOW RUN Maryland Fair 1916 110 281
BR OF LONG GREEN CREEK Maryland Fair 1916 110 5,752
WILLS CREEK Maryland Good 1916 110 11,780
CSX Maryland Fair 1916 110 32,811
MIDDLE BRANCH Maryland Poor 1916 110 14,220
BEAR CREEK Maryland Fair 1916 110 183
TONOLOWAY CREEK Maryland Good 1916 110 828
TR GREEN LINE D Massachusetts Good 1916 110 24,000
WATER SHAWSHEEN RIVER Massachusetts Fair 1916 110 20,000
RR BCRR ABANDONED Massachusetts Poor 1916 110 6,600
WATER MUNN BROOK Massachusetts Fair 1916 110 646
KALAMAZOO RIVER Michigan Fair 1916 110 9,775
STONY CREEK Michigan Fair 1916 110 1,299
PILGRIM RIVER Michigan Fair 1916 110 5,543
PLASTER CREEK Michigan Fair 1916 110 16,531
LAMB CREEK Michigan Poor 1916 110 675
BIG POTATO CREEK Michigan Poor 1916 110 39
SOUTH BR PINE RIVER Michigan Fair 1916 110 585
STREAM Minnesota Fair 1916 110 23
N CHANNEL MISS RIVER Minnesota Fair 1916 110 40
STREAM Minnesota Fair 1916 110 25
MINNEHAHA CREEK Minnesota Fair 1916 110 8,706
MIDTOWN GREENWAY Minnesota Poor 1916 110 680
LITTLE IOWA RIVER Minnesota Fair 1916 110 25
STREAM Minnesota Fair 1916 110 40
E FK DES MOINES RIVER Minnesota Fair 1916 110 30
MIDTOWN GREENWAY Minnesota Good 1916 110 862
MIDTOWN GREENWAY Minnesota Good 1916 110 970
MIDTOWN GREENWAY Minnesota Fair 1916 110 1,822
MIDTOWN GREENWAY Minnesota Poor 1916 110 1,670
COOPERS CR Missouri Fair 1916 110 40
FIRE PRAIRIE CR Missouri Good 1916 110 58
BR OF STINSON CR Missouri Fair 1916 110 50
BELEWS CR Missouri Fair 1916 110 158
BR OF HORSESHOE LK Missouri Poor 1916 110 35
BR OF MONTROSE LK Missouri Poor 1916 110 5
MODOC CR Missouri Fair 1916 110 50
INDIAN CR Missouri Poor 1916 110 50

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