US Bridges

Movable - Bascule bridges

A movable span that tilts upward on a pivot, like a drawbridge. The inventory lists 430 of them, 0.07% of all US bridges.

Bridges
430
Share of all bridges
0.07%
Poor condition
21.9%
94 bridges
Average age
64.8 yrs
Combined length
122 mi
Oldest
1902

Movable - Bascule bridges by state

StateMovable - BasculeShare of state's bridges
Florida1261.0%
Illinois490.2%
New York310.2%
Wisconsin290.2%
New Jersey260.4%
Maryland220.4%
Michigan210.2%
Massachusetts170.3%
California170.07%
Louisiana160.1%
Washington110.1%
Virginia90.06%
Oregon80.10%
Delaware70.8%
Connecticut70.2%
North Carolina60.03%
Mississippi50.03%
Ohio50.02%
Indiana30.02%
Maine30.1%
Pennsylvania30.01%
South Carolina30.03%
New Hampshire20.08%
Minnesota10.01%
Tennessee10.00%
Texas10.00%
Vermont10.03%

Materials used

Steel99.5%
Steel Continuous0.5%

When they were built

<1900: 0 bridges<19001900s: 10 bridges1019001910s: 21 bridges2119101920s: 53 bridges5319201930s: 54 bridges5419301940s: 26 bridges2619401950s: 58 bridges5819501960s: 48 bridges4819601970s: 36 bridges3619701980s: 34 bridges3419801990s: 31 bridges3119902000s: 36 bridges3620002010s: 20 bridges2020102020s: 3 bridges32020
Movable - Bascule bridges built per decade. Year built as recorded in the inventory; reconstruction years are not included.

Busiest

  1. Is 95/IS 495 over Potomac River
    Prince George's County, Maryland · 135,287 vehicles/day
    Fair
  2. Is 95/IS 495 over Potomac River
    Prince George's County, Maryland · 128,275 vehicles/day
    Fair
  3. RTE 908A over Bartow Avenue Hutchinso
    Bronx County, New York · 123,424 vehicles/day
    Fair
  4. Lake Shore Drive over Main Br Chicago Riv
    Cook County, Illinois · 102,000 vehicles/day
    Poor
  5. ST 1 A/Lynnway over Water Saugus River
    Essex County, Massachusetts · 85,600 vehicles/day
    Poor

Longest

  1. Cswy Bridge N. B. over Lake Pontchartrain
    St. Tammany Parish, Louisiana · 127,269 ft
    Fair
  2. Causeway SB over Lake Pontchartrain
    St. Tammany Parish, Louisiana · 127,200 ft
    Fair
  3. US0011 over Lake Pontchartrain
    Orleans Parish, Louisiana · 24,922 ft
    Poor
  4. Is 95/IS 495 over Potomac River
    Prince George's County, Maryland · 6,087 ft
    Fair
  5. Is 95/IS 495 over Potomac River
    Prince George's County, Maryland · 6,087 ft
    Fair

Oldest

  1. Cortland ST over N Br Chicago Riv
    Cook County, Illinois · Built 1902
    Poor
  2. Randolph ST over S.Br.Chicago River
    Cook County, Illinois · Built 1903
    Poor
  3. 3rd Street over Gowanus Canal
    Kings County, New York · Built 1903
    Poor
  4. Division ST (river over N Br Chi River
    Cook County, Illinois · Built 1904
    Poor
  5. Loomis ST over S Br Chicago River
    Cook County, Illinois · Built 1904
    Poor