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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
OVER ROARING BRANCH Pennsylvania Fair 1907 119 164
TOWAMENCIN CREEK Pennsylvania Good 1907 119 811
PARK CREEK Pennsylvania Fair 1907 119 7,612
MUD CREEK Pennsylvania Poor 1907 119 1
JACOBY CREEK Pennsylvania Fair 1907 119 2,297
OSWAYO CREEK Pennsylvania Poor 1907 119 50
BEAVER DAM CREEK Pennsylvania Fair 1907 119 25
OVER WNYP R.R. Pennsylvania Poor 1907 119 50
OVER PINE CREEK Pennsylvania Poor 1907 119 50
BRANCH OF PETERS CREEK Pennsylvania Fair 1907 119 11,534
Little Daniels Run Pennsylvania Good 1907 119 50
YOUGHIOGHENY RIVER Pennsylvania Poor 1907 119 6,557
OTTER CREEK Pennsylvania Poor 1907 119 333
WISSAHICKON CREEK Pennsylvania Fair 1907 119 18,036
CONRAIL (Abolished) Pennsylvania Fair 1907 119 6,700
CONRAIL Pennsylvania Good 1907 119 6,300
Pennypack Creek Pennsylvania Poor 1907 119 10,000
PINE RUN Pennsylvania Good 1907 119 431
CONEMAUGH RIVER Pennsylvania Poor 1907 119 30
ASHAWAY RIVER Rhode Island Poor 1907 119 653
BRANCH RIVER Rhode Island Poor 1907 119 5,454
AMTRAK & P&W RR Rhode Island Fair 1907 119 25,343
Crow Creek Wasteway South Dakota Fair 1907 119 1
BIG SIOUX RV South Dakota Poor 1907 119 92
W CLINCH AVE/WORLD FAIR Tennessee Fair 1907 119 3,063
HARDWARE RIVER Virginia Good 1907 119 174
NS RAILWAY Virginia Fair 1907 119 5,275
WENATCHEE RIVER Washington Fair 1907 119 363
SOUTH FORK HUGHES RIVER West Virginia Poor 1907 119 —
W. FK OF TWELVEPOLE CK. West Virginia Fair 1907 119 10
E BR BIG SANDY CREEK Wisconsin Fair 1907 119 24
BR APPLE CREEK Wisconsin Poor 1907 119 94
HATTON CREEK Wisconsin Good 1907 119 51
LITTLE COSSATOT RIVER Arkansas Fair 1908 118 25
MID FK FEATHER RIV OVRFL California Fair 1908 118 40
SAINT HELENA CREEK California Fair 1908 118 114
MILLIKEN CREEK California Fair 1908 118 3,000
SULPHUR CREEK California Fair 1908 118 2,790
ROSS CREEK California Good 1908 118 1,200
CHOLLAS CREEK California Good 1908 118 7,578
ARKANSAS RIVER Colorado Poor 1908 118 —
OAK CREEK Colorado Fair 1908 118 139
MILL RIVER Connecticut Poor 1908 118 4,100
YANTIC RIVER Connecticut Fair 1908 118 465
CSX RR & VA AVE District of Columbia Fair 1908 118 4,000
TIDAL BASIN District of Columbia Fair 1908 118 13,383
MOKULEHUA STRM Hawaii Fair 1908 118 1,800
WILDHORSE RIVER Idaho Poor 1908 118 30
POTLATCH RVR(SPERRY BR) Idaho Fair 1908 118 170
ST. JOE RIVER Idaho Fair 1908 118 40

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