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
HUTCHINSON RIVER New York Poor 1906 120 15,262
Abnd.CSXT/P MRRIS New York Fair 1906 120 2,232
AMTRAK/CSXT/P&W New York Fair 1906 120 13,964
AMTRAK/CSXT/P&W New York Fair 1906 120 3,657
AMTRAK/CSXT/P&W New York Fair 1906 120
AMTRAK/CSXT/P&W New York Fair 1906 120 29,040
AMTRAK/CSXT/P&W New York Fair 1906 120 4,623
AMTRAK New York Fair 1906 120 18,982
METRO NO COMMUTER New York Fair 1906 120 19,360
METRO NO COMMUTER New York Fair 1906 120
MAC CRACKEN AVE E METRO New York Poor 1906 120 1,715
METRO NO COMMUTER New York Fair 1906 120 33,834
METRO NO COMMUTER New York Fair 1906 120 16,592
NYCTA-DYRE AVE LN New York Fair 1906 120 10,374
N Y & ATLANTIC/LI New York Fair 1906 120
N Y & ATLANTIC/LI New York Good 1906 120 3,216
N Y & ATLANTIC/LI New York Fair 1906 120
N Y & ATLANTIC/LI New York Fair 1906 120 7,945
NYCTA SEA BEACH N Y & A New York Fair 1906 120 8,446
CLOVE LK PK STRM New York Fair 1906 120 13,041
LONG ISLAND-PT JF New York Fair 1906 120 4,202
BLACK CREEK New York Fair 1906 120 187
CANAL LOCK E3 SPILLWAY New York Fair 1906 120 250
MOUSE RIVER North Dakota Poor 1906 120 25
STREAM Ohio Fair 1906 120 1,573
OVER W&L.E. RR Ohio Poor 1906 120 6,311
LONG RUN Ohio Fair 1906 120 937
ALUM CREEK Ohio Poor 1906 120 267
SEVEN MILE CREEK Ohio Fair 1906 120 351
MULGEE CREEK Ohio Fair 1906 120 272
BEECH CREEK Ohio Fair 1906 120 394
CREEK Oklahoma Fair 1906 120 100
BEAVER CREEK Oklahoma Fair 1906 120 75
MEDICINE CREEK Oklahoma Poor 1906 120 200
S. CANADIAN RIVER Oklahoma Poor 1906 120 250
OWYHEE RIVER (ROME) Oregon Poor 1906 120 20
THOMPSON RUN Pennsylvania Poor 1906 120 1,997
GEDDES RUN Pennsylvania Fair 1906 120 314
PINE RUN Pennsylvania Fair 1906 120 1,000
OVER MILL RUN Pennsylvania Fair 1906 120 8,201
OVER MILL RUN Pennsylvania Fair 1906 120 1,500
OVER MILL RUN Pennsylvania Fair 1906 120 1,500
OVER MILL RUN Pennsylvania Fair 1906 120 2,500
OVER MILL RUN Pennsylvania Fair 1906 120 3,500
MILL RACE Pennsylvania Fair 1906 120 4,717
SEPTA (P&W) Pennsylvania Fair 1906 120 10,652
WEST CREEK Pennsylvania Fair 1906 120 650
MACOBY CREEK Pennsylvania Fair 1906 120 1,209
SHAMOKIN CREEK Pennsylvania Poor 1906 120 600
KISKIMINETAS & NS R/R Pennsylvania Poor 1906 120 398

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.