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Historic Bridges

94,381 bridges built before 1951 across the United States still in service today.

Bridges Built Before 1951

The United States has 94,381 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
MAD RIVER Vermont Fair 1833 193 1,900
TRIBUTARY OF BACK BROOK New Jersey Fair 1834 192 1,850
SIX MILE RUN New Jersey Good 1834 192 3,641
ONTELAUNEE CREEK Pennsylvania Poor 1834 192 100
LEE CREEK Kentucky Poor 1835 191 9
WATER LWR PAWTUCKET CNL Massachusetts Good 1835 191 12,184
WATER EASTERN CANAL Massachusetts Fair 1835 191 16,900
SIX MILE CREEK Ohio Fair 1835 191 324
Owens Creek Virginia Fair 1835 191 44
ANTIETAM STREET Maryland Fair 1836 190 2,730
OMPOMPANOOSUC RIVER Vermont Fair 1836 190 1,250
MILL RIVER Vermont Good 1836 190 500
OTTAUQUECHEE RIVER Vermont Fair 1836 190 1,500
ASHUELOT RIVER New Hampshire Fair 1837 189 618
TRIB. 3RD NESHANIC RIVER New Jersey Fair 1837 189 5,146
FRENCH CREEK Pennsylvania Fair 1837 189 1,662
ELK CREEK Pennsylvania Fair 1837 189 205
NORTH FORK SALT CREEK Indiana Fair 1838 188 400
LITTLE NESHAMINY CREEK Pennsylvania Good 1838 188 8,870
OTTER CREEK Vermont Good 1838 188 600
BRANDYWINE CREEK Delaware Fair 1839 187 3,224
ANTIETAM CREEK Maryland Good 1839 187 1,470
ANTIETAM CREEK Maryland Good 1839 187 1,698
DUNLAP CREEK Pennsylvania Poor 1839 187 6,661
HOKENDAUQUA CREEK Pennsylvania Good 1839 187 75
Kanawha Virginia Fair 1839 187 1,300
BURNETTS Creek Indiana Fair 1840 186 288
SAVAGE RIVER Maryland Fair 1840 186 4
ANTIETAM CREEK Maryland Good 1840 186 1,698
WARNER RIVER New Hampshire Fair 1840 186 428
PETERS BROOK New Jersey Poor 1840 186 1,262
ROCKAWAY RIVER New Jersey Poor 1840 186 7,737
JIMS RUN Ohio Fair 1840 186 155
OVER CONNEAUT CK W BR Pennsylvania Poor 1840 186 219
WALLOOMSAC RIVER Vermont Fair 1840 186 1,500
WALLOOMSAC RIVER Vermont Fair 1840 186 1,000
OTTER CREEK Vermont Fair 1840 186 700
BLACK RIVER Vermont Good 1840 186 10
HOUSATONIC RIVER Connecticut Fair 1841 185 1,100
ANTIETAM CREEK Maryland Good 1841 185 1,698
NISHISAKAWICK CREEK New Jersey Fair 1841 185 5,779
LITTLE SEWICKLEY CREEK Pennsylvania Fair 1841 185 3,571
ONTELAUNEE CREEK Pennsylvania Fair 1841 185 222
JORDAN CREEK Pennsylvania Fair 1841 185 100
WISSAHICKON CREEK Pennsylvania Fair 1841 185 6,457
ROCK CREEK 3370E08 Pennsylvania Fair 1841 185 10,769
E BRANCH PERKIOMEN CREEK Pennsylvania Fair 1841 185 2,130
MANSKER CREEK Tennessee Fair 1841 185 30
OTTER CREEK Vermont Fair 1841 185 550
HOUSATONIC RIVER Connecticut Fair 1842 184 400

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
Virgin Islands 5 1904 112 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