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
I0020
FairOver: I20;RAMP S5
2.2 MI EAST OF LA 34, Ouachita, LA
Built 1965 Load: 43.5 t ADT: 15,642
LA0837
FairOver: CHOUDRANT CREEK RELIEF
1.39 MI EAST OF LA 151, Ouachita, LA
Built 1984 Load: 43.5 t ADT: 1,363
LA0837
FairOver: CHOUDRANT CREEK
1.60 MI EAST OF LA 151, Ouachita, LA
Built 1984 Load: 43.5 t ADT: 1,363
LA0837
FairOver: COCKEREL CREEK
3.69 MI EAST OF LA 151, Ouachita, LA
Built 1984 Load: 43.5 t ADT: 1,363
LA0023
FairOver: ALGIERS OUTFALL C
0.2 Mi N. of LA 3017, Plaquemines, LA
Built 1968 Load: 43.5 t ADT: 29,088
LA0023/John Riley
FairOver: DRAINAGE CANAL
48.3 MI SOUTH OF LA 406, Plaquemines, LA
Built 1976 Load: 43.5 t ADT: 526
LA3131
FairOver: PORTAGE CANAL
5.3 Mi N. of LA 78, Pointe Coupee, LA
Built 1970 Load: 43.5 t ADT: 10,317
US0167
FairOver: BAYOU COCODRIE
1.2 MI. SOUTH OF I-49, Rapides, LA
Built 1966 Load: 43.5 t ADT: 2,324
I0049
FairOver: HORSESHOE CANAL
1.38 MI. NORTH OF LA 3250, Rapides, LA
Built 1995 Load: 43.5 t ADT: 45,104
I0049
FairOver: HORSESHOE CANAL
1.38 MI. NORTH OF LA 3250, Rapides, LA
Built 1995 Load: 43.5 t ADT: 20,561
US0371
FairOver: SLOUGH
2.2 MI NORTH OF US 71, Red River, LA
Built 1966 Load: 43.5 t ADT: 2,500
US0371
FairOver: GRAND BAYOU
2.37 MI NORTH OF US 72, Red River, LA
Built 1966 Load: 43.5 t ADT: 2,500
US0371
FairOver: BRACKY BRANCH
1.5 MI NORTH OF LA 786, Red River, LA
Built 1966 Load: 43.5 t ADT: 2,068
US0080
FairOver: BIG CREEK
.9 MI EAST OF LA 183, Richland, LA
Built 1982 Load: 43.5 t ADT: 1,451
LA0015
FairOver: BIG CREEK
RICHLAND/FRANKLIN PAR LN, Richland, LA
Built 1992 Load: 43.5 t ADT: 9,661
US0425
FairOver: BIG CREEK
RICHLAND/FRANKLIN PAR LN, Richland, LA
Built 1992 Load: 43.5 t ADT: 3,700
LA0135
FairOver: BIG CREEK
3.4 MI SOUTH OF LA 622, Richland, LA
Built 1975 Load: 43.5 t ADT: 698
LA0006
FairOver: BLACKWELL CREEK
0.84 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
LA0006
FairOver: PHILLIPS CREEK
1.58 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
LA0006
FairOver: PHILLIPS CREEK
1.75 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
LA3127
FairOver: VIAL CANAL
.9 MI EAST OF LA 3160, St. Charles, LA
Built 1975 Load: 43.5 t ADT: 6,703
LA3127
FairOver: EIGHTY ARPENT CANAL
3.6 MI EAST OF LA 3160, St. Charles, LA
Built 1975 Load: 43.5 t ADT: 6,703
LA0010
FairOver: JOSEPH BRANCH
0.68 M EAST OF LA 43, St. Helena, LA
Built 1991 Load: 43.5 t ADT: 5,211
LA0016
FairOver: EAST HOG BRANCH
3.7M EAST OF LA 449, St. Helena, LA
Built 1991 Load: 43.5 t ADT: 3,959
LA0182
FairOver: BAYOU BOEUF
10.46 MI NORTH OF LA 10, St. Landry, LA
Built 1998 Load: 43.5 t ADT: 455
I0049
FairOver: BAYOU DELPUENTE
1.8 MI N of US 190, St. Landry, LA
Built 1983 Load: 43.5 t ADT: 16,429
I0049
FairOver: BAYOU DELPUENTE
2.03 Mi S of LA 744, St. Landry, LA
Built 1983 Load: 43.5 t ADT: 13,540
I0049
FairOver: BAYOU CARRON
0.8 MI NORTH OF US 167, St. Landry, LA
Built 1983 Load: 43.5 t ADT: 23,498
I0049
FairOver: BAYOU CARRON
1.34 MI S of LA 103, St. Landry, LA
Built 1983 Load: 43.5 t ADT: 13,540
I0049
FairOver: DRAINAGE CANAL
4.19 MI N OF LA 745, St. Landry, LA
Built 1986 Load: 43.5 t ADT: 21,048
I0049
FairOver: DRAINAGE CANAL
7.80 Mi S of LA 29, St. Landry, LA
Built 1986 Load: 43.5 t ADT: 13,540
I0049
FairOver: BAYOU COCODRIE
6.23 Mi N of LA 10, St. Landry, LA
Built 1986 Load: 43.5 t ADT: 21,048
I0049
FairOver: BAYOU COCODRIE
6.54 Mi S of LA 29, St. Landry, LA
Built 1986 Load: 43.5 t ADT: 13,540
LA0757
FairOver: DRAINAGE CANAL
0.87 Mi N of US 190, St. Landry, LA
Built 1998 Load: 43.5 t ADT: 3,491
I0010
FairOver: BAYOU PORTAGE
2.0 MI EAST OF LA 347, St. Martin, LA
Built 1970 Load: 43.5 t ADT: 37,370
I0010
FairOver: BAYOU PORTAGE
5.00 Mi W of LA 3177, St. Martin, LA
Built 1970 Load: 43.5 t ADT: 1,585
LA0083
FairOver: BAYOU CHOUPIQUE
5.49 Mi E of LA 318, St. Mary, LA
Built 1978 Load: 43.5 t ADT: 3,078
US0090
FairOver: BAYOU CHOUPIQUE
0.5 Mi NW of LA 83, St. Mary, LA
Built 1978 Load: 43.5 t ADT: 229
US0090
FairOver: BAYOU CHOUPIQUE
0.4 Mi NW of LA 83, St. Mary, LA
Built 1978 Load: 43.5 t ADT: 12,192
US0190
FairOver: BOGUE FALAYA
0.2 MI WEST OF LA 21 INT., St. Tammany, LA
Built 1993 Load: 43.5 t ADT: 9,408
I0010
FairOver: CANAL
2.0 M SW OF LA 433, St. Tammany, LA
Built 1965 Load: 43.5 t ADT: 42,154
I0010
FairOver: CANAL
2.0 M SW OF LA 433, St. Tammany, LA
Built 1965 Load: 43.5 t ADT: 1,600
LA0010
FairOver: CREEK
0.5 M E OF US 51, Tangipahoa, LA
Built 1966 Load: 43.5 t ADT: 3,768
LA0056
FairOver: ST LOUIS CANAL
5.96 MI SOUTH OF LA 58, Terrebonne, LA
Built 1969 Load: 43.5 t ADT: 7,379
US0090
FairOver: DRAINAGE CANAL NO 2
1.30 MI E OF LA 311, Terrebonne, LA
Built 1987 Load: 43.5 t ADT: 8,789
US0090
FairOver: DRAINAGE CANAL NO 2
1.30 MI E OF LA 311, Terrebonne, LA
Built 1987 Load: 43.5 t ADT: 11,661
LA0033
FairOver: STOWE CREEK
.01 MI NORTH OF LA 151, Union, LA
Built 1973 Load: 43.5 t ADT: 5,013
LA0033
FairOver: MILL CREEK
.7 MI NORTH OF LA 151, Union, LA
Built 1973 Load: 43.5 t ADT: 5,013
LA0033
FairOver: FEZEL CREEK
1.5 MI NORTH OF LA 151, Union, LA
Built 1973 Load: 43.5 t ADT: 5,013
LA0033
FairOver: CREEK
3.4 MI NORTH OF LA 827, Union, LA
Built 1996 Load: 43.5 t ADT: 1,200
Showing 6,101-6,150 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 |