Total Bridges
12,699
Public highway bridges in Louisiana
State profile · Above national median SD
Louisiana bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Louisiana — drawn straight from the FHWA National Bridge Inventory.
- 12,699
- Public bridges
- 36.2%
- Good condition
- 11.0%
- Poor condition
- 11.0%
- Structurally deficient
Good Condition
36.2%
4,603 bridges rated 7-9
-13.8pp vs 50% benchmark
Poor Condition
11.0%
1,397 bridges rated 0-4
Structurally Deficient
11.0%
1,397 bridges flagged for repair priority
4.0pp vs national avg 7.0%
Louisiana vs national bridge condition
Louisiana — Good condition share 36.2%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Louisiana — Structurally deficient share 36.7%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — Louisiana (FHWA NBI)
Counties (64)
Acadia 282 Allen 178 Ascension 216 Assumption 68 Avoyelles 147 Beauregard 221 Bienville 190 Bossier 270 Caddo 682 Calcasieu 463 Caldwell 124 Cameron 58 Catahoula 70 Claiborne 148 Concordia 42 De Soto 201 East Baton Rouge 548 East Carroll 55 East Feliciana 133 Evangeline 156 Franklin 131 Grant 209 Iberia 143 Iberville 80 Jackson 163 Jefferson 379 Jefferson Davis 240 LaSalle 195 Lafayette 323 Lafourche 130 Lincoln 171 Livingston 253 Madison 104 Morehouse 136 Natchitoches 313 Orleans 382 Ouachita 337 Plaquemines 34 Pointe Coupee 50 Rapides 523 Red River 63 Richland 207 Sabine 195 St. Bernard 47 St. Charles 82 St. Helena 139 St. James 26 St. John the Baptist 40 St. Landry 317 St. Martin 116 St. Mary 124 St. Tammany 360 Tangipahoa 477 Tensas 52 Terrebonne 215 Union 121 Vermilion 261 Vernon 341 Washington 285 Webster 194 West Baton Rouge 73 West Carroll 88 West Feliciana 108 Winn 220
Louisiana vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Louisiana on the same metric.
42
Pennsylvania
10.50% top marginal rate
38
North Dakota
10.84% top marginal rate
22
Louisiana
11.00% top marginal rate
72
Puerto Rico
11.98% top marginal rate
23
Maine
13.23% top marginal rate
Bridges Needing Most Attention in Louisiana
Six lowest-condition bridges in Louisiana, ranked by composite NBI rating. Each is inspected at least every 24 months.
Layton Coco Xing
Structurally DeficientOver: BAYOU DES GLAISES
0.01 MI. EAST OF LA 451, Avoyelles, LA
Built 1986 Load: 0.9 t ADT: 40
LA1077
Structurally DeficientOver: BLACK BAYOU
1.1 M S OF LA 22, St. Tammany, LA
Built 1965 Load: 0.9 t ADT: 1,019
LA0308
Structurally DeficientOver: BAYOU LAFOURCHE
.01 MI NORTH OF LA 1, Lafourche, LA
Built 1970 Load: 1.0 t ADT: 5,198
Ebeneezer Tap Rd
PoorOver: JONES CREEK
0.65 Mi South of LA 500, LaSalle, LA
Built 1989 Load: 1.2 t ADT: 300
Anderson Rd
Structurally DeficientOver: HYDE BR.
2 MI S OF 1054 & 440, Tangipahoa, LA
Built 1960 Load: 1.2 t ADT: 25
Stubblefield Rd
PoorOver: BAYOU ROUGE
APPROX. 1 M. S. OF LA 361, Avoyelles, LA
Built 1975 Load: 2.3 t ADT: 40
All Bridges in Louisiana
US0171
FairOver: BAYOU SAN MIGUEL
0.96 MI. NORTH OF LA 120, Sabine, LA
Built 1963 Load: 22.7 t ADT: 4,790
US0171
FairOver: BEAR CREEK
3.96 MI. NORTH OF LA 174, Sabine, LA
Built 1963 Load: 22.7 t ADT: 5,228
LA0010
FairOver: AMITE RIVER RELIEF
1.2 M W OF LA 38, St. Helena, LA
Built 1963 Load: 22.7 t ADT: 2,534
LA0010
FairOver: AMITE RIVER RELIEF
1.0 M W OF LA 38, St. Helena, LA
Built 1963 Load: 22.7 t ADT: 2,534
LA0448
FairOver: BLACK CREEK
LA0448, St. Helena, LA
Built 1962 Load: 22.7 t ADT: 547
US0061
FairOver: DRAIN CANAL
1.39 M W of LA 641, St. James, LA
Built 1954 Load: 22.7 t ADT: 8,171
US0061
FairOver: TCHACKCHOU BAYOU
US0061, St. James, LA
Built 1954 Load: 22.7 t ADT: 8,171
LA0010
FairOver: LITTLE WAUKSHA B
1.2 MI EAST OF LA 182, St. Landry, LA
Built 1961 Load: 22.7 t ADT: 3,283
LA0010
FairOver: BAYOU WAUKSHA
2.9 MI EAST OF LA 182, St. Landry, LA
Built 1961 Load: 22.7 t ADT: 3,283
LA0031
FairOver: BAYOU FUSELIER
LA 93 @ LA 31, St. Landry, LA
Built 1961 Load: 22.7 t ADT: 4,574
LA0093
FairOver: BAYOU BOURBEAU
2.9 MI WEST OF LA 760-2, St. Landry, LA
Built 1959 Load: 22.7 t ADT: 4,266
LA0031
FairOver: BAYOU TECHE
0.02 MI W of LA 347, St. Landry, LA
Built 1960 Load: 22.7 t ADT: 1,807
I0049
FairOver: BAYOU CARENCRO
2.10 Mi S of LA 93, St. Landry, LA
Built 1963 Load: 22.7 t ADT: 22,211
LA0093
FairOver: BAYOU FUSELIER
3.1 MI W OF LA 31, St. Martin, LA
Built 1959 Load: 22.7 t ADT: 3,987
LA0025
FairOver: DRAIN
1.3 M S OF LA 40, St. Tammany, LA
Built 1963 Load: 22.7 t ADT: 3,684
LA0025
FairOver: BOGUE FALAYA R
LA0025, St. Tammany, LA
Built 1963 Load: 22.7 t ADT: 9,685
Lake Rd
FairOver: LACOMBE BAYOU
1.0M SOUTH OF LA 434, St. Tammany, LA
Built 1992 Load: 22.7 t ADT: 100
Magnolia Gardens
FairOver: BRIDGE OVER UNNAMED CREE
1MI.N.OF JCT LA 21 & LA36, St. Tammany, LA
Built 1996 Load: 22.7 t ADT: 100
US0190
FairOver: WASHLEY CREEK
US0190, Tangipahoa, LA
Built 1954 Load: 22.7 t ADT: 8,262
US0190
FairOver: CREEK
4.6 M E OF LA 445, Tangipahoa, LA
Built 1954 Load: 22.7 t ADT: 8,262
LA0016
FairOver: DRAIN
0.7 M E OF US 51, Tangipahoa, LA
Built 1962 Load: 22.7 t ADT: 12,718
LA0016
FairOver: SPRING BRANCH
LA0016, Tangipahoa, LA
Built 1962 Load: 22.7 t ADT: 12,718
LA0022
FairOver: NATALBANY RIVER
0.07 MI. EAST OF LA 42, Tangipahoa, LA
Built 1956 Load: 22.7 t ADT: 9,490
PROSPECT BLVD
FairOver: DRAIN CANAL
0.6 MI S OF LA 24, Terrebonne, LA
Built 1995 Load: 22.7 t ADT: 10,390
LA0002
FairOver: FOURMILE CREEK
1.8 MI WEST OF LA 15, Union, LA
Built 1964 Load: 22.7 t ADT: 11,805
LA0014
FairOver: ISLE MARRON CANAL
1.6 MI E. OF LA 35, Vermilion, LA
Built 1959 Load: 22.7 t ADT: 7,329
LA0117
FairOver: CALCASIEU RIVER
3.26 MI. NORTH OF LA 111, Vernon, LA
Built 1962 Load: 22.7 t ADT: 1,513
LA0465
FairOver: BALL BRANCH
5.25 MI EAST OF LA 8, Vernon, LA
Built 1981 Load: 22.7 t ADT: 500
LA0021
FairOver: CREEK
2.5 M N OF LA 436, Washington, LA
Built 1960 Load: 22.7 t ADT: 4,719
LA0021
FairOver: SCARBOROUGHS CREEK
1.7 M SW OF LA 438, Washington, LA
Built 1960 Load: 22.7 t ADT: 4,719
LA0021
FairOver: SCARBOROUGHS CREEK
1.1 M SW OF LA 438, Washington, LA
Built 1960 Load: 22.7 t ADT: 4,719
LA0021
FairOver: CREEK
0.7 M S OF LA 438, Washington, LA
Built 1960 Load: 22.7 t ADT: 4,719
LA0021
FairOver: ARDS CREEK
LA0021, Washington, LA
Built 1960 Load: 22.7 t ADT: 2,646
LA0016
FairOver: BERRYS CREEK
LA0016, Washington, LA
Built 1969 Load: 22.7 t ADT: 1,137
LA0025
FairOver: MILE BRANCH
LA0025, Washington, LA
Built 1963 Load: 22.7 t ADT: 4,117
LA0025
FairOver: CALICO BRANCH
1.3 M NW OF LA 10, Washington, LA
Built 1963 Load: 22.7 t ADT: 4,117
LA0025
FairOver: HAYS CREEK
LA0025, Washington, LA
Built 1963 Load: 22.7 t ADT: 4,117
LA0438
FairOver: DRAIN
0.2 M W OF LA 25, Washington, LA
Built 1967 Load: 22.7 t ADT: 666
LA0439
FairOver: DRAIN
4.1 M W OF LA 60, Washington, LA
Built 1955 Load: 22.7 t ADT: 1,235
Peachtree Rd
FairOver: Trib. to Crow's Creek
2.7 Mi. E of LA 532, Webster, LA
Built 2023 Load: 22.7 t ADT: 44
Dorcheat Rd
FairOver: TRIBUTARY TO COW CREEK
11 MI N OF HWY 79-80, Webster, LA
Built 1979 Load: 22.7 t ADT: 294
LA0017
FairOver: CREEK
3.2 MI NORTH OF LA 577, West Carroll, LA
Built 1924 Load: 22.7 t ADT: 2,370
LA0010
FairOver: ALEXANDER CREEK
0.6 MILES NORTHEAST OF US, West Feliciana, LA
Built 1948 Load: 22.7 t ADT: 2,761
Bains Rd
FairOver: BEAR CREEK
2.4 MI.LA66,US61 JCT., West Feliciana, LA
Built 1998 Load: 22.7 t ADT: 80
Solitude Rd
FairOver: LITTLE BAYOU SARA
0.01 Mi. S. of LA 66, West Feliciana, LA
Built 1987 Load: 22.7 t ADT: 800
Old Tunica Rd
FairOver: MOSHER CREEK
0.8 MI.N. Of LA 968, West Feliciana, LA
Built 1970 Load: 22.7 t ADT: 90
LA0499
FairOver: BRUSHY CREEK
3.17 MI EAST OF LA 34, Winn, LA
Built 1963 Load: 22.7 t ADT: 394
US0190
FairOver: BAYOU SERPENT
2.86 MI. E OF INT US165, Allen, LA
Built 1932 Load: 23.0 t ADT: 6,929
LA0110
FairOver: HICKORY BRANCH
2.0 MI W OF US171, Beauregard, LA
Built 1948 Load: 23.0 t ADT: 2,079
US0065
FairOver: MISSISSIPPI RIVER
.01 MI EAST OF LA 131, Concordia, LA
Built 1940 Load: 23.0 t ADT: 21,661
Showing 2,401-2,450 of 12,699 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |