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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
N CHUCTANUNDA CK New York Poor 1912 114 3,960
PIPE LINE ROAD MNRR HA New York Fair 1912 114 13,794
BRONX RIVER New York Poor 1912 114 2,369
LITTLE HOOSIC RIVER New York Poor 1912 114 487
SPRING CREEK BRANCH 2 New York Fair 1912 114 1,464
BRONX RIVER New York Fair 1912 114 10,776
LITTLE BEAVER KILL New York Fair 1912 114 295
ERIE CANAL New York Fair 1912 114 —
ERIE CANAL New York Poor 1912 114 412
ERIE CANAL New York Fair 1912 114 456
Canalway Trail ERIE CAN New York Fair 1912 114 446
ERIE CANAL New York Poor 1912 114 3,155
Erie Canal Trailway ERI New York Poor 1912 114 851
Canal Trailway ERIE CAN New York Fair 1912 114 2,832
Erie Canalway Trail Eri New York Fair 1912 114 5,239
ERIE CANAL New York Good 1912 114 3,276
Erie Canalway Trail ERI New York Fair 1912 114 225
Canal Trailway ERIE CAN New York Poor 1912 114 721
Erie Canal Heritage Trai New York Poor 1912 114 1,219
Erie Canal Heritage Trai New York Fair 1912 114 933
ERIE CANAL New York Poor 1912 114 7,684
NEW YORK CENTRAL RR New York Fair 1912 114 70
SHEYENNE RIVER North Dakota Poor 1912 114 15
SHEYENNE RIVER North Dakota Poor 1912 114 24
CANNONBALL RIVER North Dakota Poor 1912 114 50
WILD RICE RIVER North Dakota Poor 1912 114 20
GOOSE RIVER North Dakota Poor 1912 114 20
FOREST RIVER North Dakota Poor 1912 114 10
MID BRCH SHADE RIVER Ohio Good 1912 114 351
COLCLASER RUN Ohio Good 1912 114 324
MOORES FORK Ohio Fair 1912 114 324
NO NAME Ohio Good 1912 114 119
LITTLE BULL CREEK Ohio Fair 1912 114 324
MOHICAN RIVER Ohio Poor 1912 114 385
CONRAIL N&S RR-RTA 24 Ohio Good 1912 114 7,225
T RUSH CR (BETHEL RD SE) Ohio Fair 1912 114 62
West Fork Channel Ohio Good 1912 114 12,828
LITTLE PINE CREEK Ohio Fair 1912 114 454
BEAVER CR NORTH RIDGE RD Ohio Good 1912 114 6,765
W BR NIMISHILLEN CREEK Ohio Fair 1912 114 4,749
MUD CREEK Oklahoma Poor 1912 114 832
CREEK Oklahoma Poor 1912 114 25
CREEK Oklahoma Poor 1912 114 45
CREEK Oklahoma Poor 1912 114 45
ROCK CREEK Oklahoma Fair 1912 114 100
CREEK Oklahoma Fair 1912 114 100
ROBINSON CREEK Oklahoma Poor 1912 114 100
SALT CREEK Oklahoma Poor 1912 114 100
RANCH CREEK Oklahoma Poor 1912 114 100
ROBINSON CREEK Oklahoma Fair 1912 114 100

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