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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
SWEITZERS RUN Pennsylvania Fair 1900 126 54
N. BR. BUFFALO CREEK Pennsylvania Poor 1900 126 119
BUFFALO CREEK Pennsylvania Poor 1900 126 150
LIMESTONE RUN Pennsylvania Fair 1900 126 1,944
BUFFALO CREEK Pennsylvania Fair 1900 126 300
OVER BULLION RUN Pennsylvania Fair 1900 126 1,056
OVER CHERRYTREE RUN Pennsylvania Poor 1900 126 100
OVER LAKE CREEK Pennsylvania Fair 1900 126 100
LITTLE SCRUBGRASS CREEK Pennsylvania Fair 1900 126 25
MILL CREEK Pennsylvania Fair 1900 126 100
YOUGHIOGHENY RIV/BIKE TR Pennsylvania Fair 1900 126 2,589
SEPTA;CHESTNUTHILL W.BR. Pennsylvania Poor 1900 126 8,308
Bluff Run Pennsylvania Poor 1900 126 —
SHICKSHINNY CREEK Pennsylvania Fair 1900 126 100
ANGELICA CREEK Pennsylvania Fair 1900 126 —
Toms Creek Pennsylvania Fair 1900 126 100
WOLF RUN Pennsylvania Fair 1900 126 5
ASHAWAY RIVER Rhode Island Poor 1900 126 1,111
PAWTUXET RIVER Rhode Island Good 1900 126 5,919
BLACKSTONE CANAL Rhode Island Good 1900 126 2,958
AMTRAK & P&W RR Rhode Island Fair 1900 126 12,323
AMTRAK & P&W RR Rhode Island Poor 1900 126 12,727
AMTRAK & P&W RR Rhode Island Poor 1900 126 16,040
PETERS RIVER Rhode Island Fair 1900 126 6,592
POCASSET RIVER Rhode Island Good 1900 126 2,630
WOONASQUATUCKET HEADRACE Rhode Island Fair 1900 126 10
SAND CREEK South Dakota Fair 1900 126 156
PEARL CREEK South Dakota Fair 1900 126 103
BIG SIOUX RV South Dakota Poor 1900 126 63
JAMES RIVER South Dakota Poor 1900 126 98
CLAY CK DITCH South Dakota Poor 1900 126 97
TURKEY CREEK Tennessee Fair 1900 126 560
BRANCH Tennessee Good 1900 126 160
BRANCH Tennessee Fair 1900 126 20
NOLAN RIVER Texas Fair 1900 126 71
EAST NAVIDAD RIVER Texas Poor 1900 126 100
CUMMINS CREEK Texas Poor 1900 126 30
DRY CREEK Texas Fair 1900 126 204
SAN ANTONIO RIVER Texas Poor 1900 126 223
SAN ANTONIO RIVER Texas Fair 1900 126 807
SAN ANTONIO RIVER Texas Poor 1900 126 233
SAN ANTONIO RIVER Texas Poor 1900 126 682
COLORADO RIVER Texas Poor 1900 126 10
JEWETT BROOK Vermont Fair 1900 126 500
PARAN RIVER Vermont Fair 1900 126 750
MILL BROOK Vermont Fair 1900 126 120
COX BROOK Vermont Fair 1900 126 1,200
BULL CREEK Vermont Poor 1900 126 20
3RD BRANCH WHITE R. Vermont Fair 1900 126 100
WILLIAMS RIVER Vermont Good 1900 126 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