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
FISHING CREEK Maryland Good 1906 120 166
BEAVER CREEK Maryland Fair 1906 120 399
RR MBTA/BMRR Massachusetts Fair 1906 120 9,069
RR CSX/MACRR Massachusetts Fair 1906 120 3,214
WATER CHARLES RIVER Massachusetts Poor 1906 120 28,188
RR CSX Massachusetts Fair 1906 120 12,413
HWY MARTIN COUGHLIN BY Massachusetts Fair 1906 120 16,800
HWY MARTIN COUGHLIN BY Massachusetts Fair 1906 120 28,100
RR MBTA/CSX Massachusetts Fair 1906 120 11,121
RR MBTA Massachusetts Fair 1906 120 1,400
TR GREEN LINE D Massachusetts Fair 1906 120 1,500
RR CSX Massachusetts Fair 1906 120 41,897
WATER N NASHUA RIVER Massachusetts Fair 1906 120 9,922
WATER BLYNMAN CANAL Massachusetts Poor 1906 120 4,886
WATER MERRIMACK RIVER Massachusetts Good 1906 120 10,682
WATER MYSTIC RIVER Massachusetts Fair 1906 120 26,600
WATER MYSTIC RIVER Massachusetts Fair 1906 120 33,900
TR GREEN LINE D Massachusetts Fair 1906 120 766
TR GREEN LINE D Massachusetts Poor 1906 120 24,569
WERNERS CREEK Michigan Fair 1906 120 50
BETSIE RIVER Michigan Fair 1906 120 54
HAYWORTH CREEK Michigan Poor 1906 120 102
SHIAWASSEE RIVER Michigan Good 1906 120 10,918
PRESQUE ISLE RIVER Michigan Poor 1906 120 10
SALT RIVER Michigan Poor 1906 120 73
MILL RACE Michigan Fair 1906 120 233
MANISTEE RIVER Michigan Poor 1906 120 106
MO ROUTE 12 Missouri Fair 1906 120 3,459
HURRICANE CR Missouri Poor 1906 120 35
BIG RVR Missouri Fair 1906 120 200
PLATTIN CR Missouri Poor 1906 120 242
PANTHER CR Missouri Fair 1906 120 25
CREEK Missouri Poor 1906 120 504
N FK ELKHORN RIVER Nebraska Poor 1906 120 100
MUDDY CREEK Nebraska Poor 1906 120 20
LANDING CREEK New Jersey Fair 1906 120 1,062
OVERPECK CREEK New Jersey Fair 1906 120 1,441
SPARKILL CREEK New Jersey Fair 1906 120 22,073
NYS&W RAILROAD MAIN LINE New Jersey Fair 1906 120 11,643
N BRANCH PENNSAUKEN CRK New Jersey Poor 1906 120 3,521
PARKERS CREEK New Jersey Poor 1906 120 10,066
COOPER RIVER New Jersey Fair 1906 120 10,924
CAPE MAY BRANCH New Jersey Fair 1906 120 5,531
S. BRANCH RARITAN RIVER New Jersey Good 1906 120 12,976
PASSAIC RIVER New Jersey Fair 1906 120 28,602
MINE BROOK New Jersey Fair 1906 120 1,197
BEAR GULCH CREEK New York Poor 1906 120 170
MUD CREEK OVERFLO New York Fair 1906 120 2,550
CROSS RIVER RESERVOIR New York Fair 1906 120 2,996
BRANDY BROOK New York Fair 1906 120 304

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.