US Bridges

Louisiana bridges

Louisiana reports 12,684 bridges and culverts across 64 counties. 1,423 (11.2%) are rated in poor condition, and 1,921 are posted with load limits or closed. The oldest structure still in the inventory dates from 1908.

Bridges
12,684
Counties
64
Good
38%
Fair
51%
Poor
11%
1,423 bridges
Average age
43 yrs

Find a bridge in Louisiana

Type at least two characters, or pick a condition or type, to search every bridge in the state.

Counties

Circle size reflects the number of bridges

Condition

11%poor
Good38%(4,802)
Fair51%(6,459)
Poor11%(1,423)

Counties with the highest share of poor bridges

Poor-condition bridgesFairGood

Structure types

Structure typeBridgesShare
Slab5,87746.3%
Stringer/Multi-beam or Girder3,12724.7%
Culvert2,58320.4%
Tee Beam2962.3%
Channel Beam2812.2%
Girder and Floorbeam System1811.4%
Box Beam or Girders - Multiple1190.9%
Movable - Swing770.6%
Movable - Lift460.4%
Truss - Thru380.3%
Arch - Deck230.2%
Movable - Bascule160.1%
Other50.0%
Box Beam or Girders - Single or Spread40.0%
Segmental Box Girder30.0%
Truss - Deck30.0%
Stayed Girder20.0%
Mixed Types10.0%
Frame10.0%
Orthotropic10.0%

When Louisiana's bridges were built

<1900: 0 bridges<19001900s: 1 bridges119001910s: 2 bridges219101920s: 45 bridges4519201930s: 302 bridges30219301940s: 181 bridges18119401950s: 1,105 bridges1.1k19501960s: 2,230 bridges2.2k19601970s: 2,220 bridges2.2k19701980s: 1,927 bridges1.9k19801990s: 1,726 bridges1.7k19902000s: 1,285 bridges1.3k20002010s: 1,316 bridges1.3k20102020s: 344 bridges3442020
Bridges built per decade. Year built as recorded in the inventory; reconstruction years are not included.

Busiest

  1. I0010 over Wards Creek
    East Baton Rouge Parish · 201,563 vehicles/day
    Fair
  2. I0010 over Washington Street
    East Baton Rouge Parish · 197,070 vehicles/day
    Fair
  3. I0010 over Mississippi River
    East Baton Rouge Parish · 197,070 vehicles/day
    Fair
  4. I0010 over LA 30 & City Streets
    East Baton Rouge Parish · 197,070 vehicles/day
    Fair
  5. I0010 over I-10 to I-110 S.B.
    East Baton Rouge Parish · 197,070 vehicles/day
    Fair

Longest

  1. Cswy Bridge N. B. over Lake Pontchartrain
    St. Tammany Parish · 127,269 ft
    Fair
  2. Causeway SB over Lake Pontchartrain
    St. Tammany Parish · 127,200 ft
    Fair
  3. I0055 over I-10 & US 51 & Swamp
    St. John the Baptist Parish · 76,714 ft
    Good
  4. I0055 over US 51 & Swamp
    St. John the Baptist Parish · 75,831 ft
    Fair
  5. I0010 over Bonnet Carre Spillway
    St. Charles Parish · 50,814 ft
    Fair

Oldest

  1. Old HWY 80 over Judd Bayou
    Madison Parish · Built 1908
    Fair
  2. Sparrow Lane over Marteau Bayou
    Grant Parish · Built 1919
    Poor
  3. Almonaster Ave over Inner Harbor Navigation
    Orleans Parish · Built 1919
    Poor
  4. US0190 over Drain
    Livingston Parish · Built 1920
    Good
  5. Cardinal Loop over Choctaw Bayou
    Avoyelles Parish · Built 1921
    Fair

Newest

  1. LA 23 over Intercoastal Waterway
    Plaquemines Parish · Built 2024
    Good
  2. Cedarcrest Ave. over Weiner Creek
    East Baton Rouge Parish · Built 2024
    Good
  3. US 190 over Canal
    Livingston Parish · Built 2024
    Good
  4. LA 964 over Comite River Diversion
    East Baton Rouge Parish · Built 2024
    Good
  5. LA 3241 over Talisheek Creek
    St. Tammany Parish · Built 2024
    Good

Who owns Louisiana's bridges

State7,74361.0%
County3,78329.8%
City7666.0%
Federal2652.1%
Town / Township930.7%
Local220.2%
Toll Authority110.1%
Railroad10.0%

More Louisiana facts

Total bridge length798 miles
Total deck area182,753,552 sq ft
Culverts counted as bridges2,583 (20%)
On the National Highway System3,039
Posted with load limits1,820
Closed to traffic101
Listed or eligible for the National Register101
Average daily traffic per bridge7,987 vehicles
Newest structure2024