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
MITCHINER RD
FairOver: BIG CREEK
2.2 MI E OF LA 183, Richland, LA
Built 2016 Load: 42.4 t ADT: 200
SHUTEYE RD
FairOver: HARPOON BAYOU
1.1 MI. WEST OF LA 6, Sabine, LA
Built 1984 Load: 42.4 t ADT: 300
Magazine St
FairOver: EAST PONCHATOULA CREEK
1 MI NW OF JCT 190 & 443, Tangipahoa, LA
Built 1985 Load: 42.4 t ADT: 2,075
Allen Rd
FairOver: TIGER BAYOU
0.5 MI W of LA 586, West Carroll, LA
Built 2006 Load: 42.4 t ADT: 184
LA0013
FairOver: BAYOU BLANC
2.2 MI NORTH OF LA 3007, Acadia, LA
Built 2001 Load: 42.6 t ADT: 7,361
LA0035
FairOver: DRAINAGE CANAL BRIDGE
.1 MI NORTH OF LA 98, Acadia, LA
Built 1966 Load: 42.6 t ADT: 8,443
I0010
FairOver: BAYOU NAZPIQUE
0.4 MI EAST OF LA 97, Acadia, LA
Built 1961 Load: 42.6 t ADT: 36,670
I0010
FairOver: BAYOU NAZPIQUE
9.67 MI W of LA 91, Acadia, LA
Built 1961 Load: 42.6 t ADT: 1,471
LA3123
FairOver: Bayou Mallet Lateral
1.57 MI SE OF LA 755, Acadia, LA
Built 1970 Load: 42.6 t ADT: 2,134
LA0070
FairOver: BAYOU LAFOURCHE
0.06 M E of LA 1&LA 70, Assumption, LA
Built 1977 Load: 42.6 t ADT: 3,881
LA0009
FairOver: BLACK LAKE CREEK
1.2 MI NORTH OF I-20, Bienville, LA
Built 1975 Load: 42.6 t ADT: 2,360
LA0153
FairOver: CASTOR CREEK
8.34 MI NORTH OF LA 155, Bienville, LA
Built 1974 Load: 42.6 t ADT: 1,377
LA0153
FairOver: CASTOR CR. RELIEF
8.62 MI NORTH OF LA 155, Bienville, LA
Built 1974 Load: 42.6 t ADT: 1,377
I0020
FairOver: LEATHERMAN CREEK
1.86 MI WEST OF LA 154, Bienville, LA
Built 1964 Load: 42.6 t ADT: 37,514
I0020
FairOver: LEATHERMAN CREEK
1.86 MI WEST OF LA 154, Bienville, LA
Built 1964 Load: 42.6 t ADT: 37,514
I0020
FairOver: F1F1 BAYOU
5.5 MI EAST OF LA 782-2, Bossier, LA
Built 1975 Load: 42.6 t ADT: 62,470
I0020
FairOver: F1F1 BAYOU
5.5 MI EAST OF LA 782-2, Bossier, LA
Built 1975 Load: 42.6 t ADT: 62,470
I0020
FairOver: CLARKE BAYOU
0.5 MI EAST OF US 80, Bossier, LA
Built 1975 Load: 42.6 t ADT: 25,379
I0020
FairOver: CLARKE BAYOU
0.5 MI EAST OF US 80, Bossier, LA
Built 1975 Load: 42.6 t ADT: 25,379
I0220
FairOver: VIKING DRIVE
2.8 Mi. East of LA 1, Bossier, LA
Built 1978 Load: 42.6 t ADT: 42,148
I0220
FairOver: KCS RR
4.2 MI EAST OF LA 3105, Bossier, LA
Built 1978 Load: 42.6 t ADT: 25,004
LA3105
FairOver: COOPERS BAYOU
0.1 MI NORTH OF LA 72, Bossier, LA
Built 1975 Load: 42.6 t ADT: 32,603
US0171
FairOver: CYPRESS BAYOU RELIEF NO
7.3 MI. S. OF LA 526, Caddo, LA
Built 1953 Load: 42.6 t ADT: 3,031
US0171
FairOver: CYPRESS BAYOU RELIEF NO
7.0 MI. S. OF LA 526, Caddo, LA
Built 1953 Load: 42.6 t ADT: 3,031
US0171
FairOver: BUCHANAN BAYOU
5.3 MI. N. OF LA 3276, Caddo, LA
Built 1967 Load: 42.6 t ADT: 8,575
I0210
FairOver: ERNEST STREET
1.5 MI E of LA 1138-2, Calcasieu, LA
Built 1975 Load: 42.6 t ADT: 32,874
I0210
FairOver: ERNEST STREET
0.3 MI W of LA 385, Calcasieu, LA
Built 1975 Load: 42.6 t ADT: 32,874
I0210
FairOver: COMMON STREET
2.1 MI EAST OF LA 1138-2, Calcasieu, LA
Built 1975 Load: 42.6 t ADT: 26,200
I0210
FairOver: COMMON STREET
2.0 MI W of LA 14, Calcasieu, LA
Built 1975 Load: 42.6 t ADT: 60,585
I0210
FairOver: KIRKMAN STREET
1.8 MI W of LA 14, Calcasieu, LA
Built 1975 Load: 42.6 t ADT: 30,293
I0010
FairOver: VINTON CANAL
1.1 MI E OF LA 3063, Calcasieu, LA
Built 1966 Load: 42.6 t ADT: 86,969
I0010
FairOver: VINTON CANAL
0.3 MI W OF LA 108, Calcasieu, LA
Built 1966 Load: 42.6 t ADT: 3,799
I0010
FairOver: DRAIN
4.9 MI EAST OF LA 397, Calcasieu, LA
Built 1964 Load: 42.6 t ADT: 68,113
I0010
FairOver: DRAIN
2.2 MI W OF LA 383, Calcasieu, LA
Built 1964 Load: 42.6 t ADT: 11,437
LA0027
FairOver: CANAL
1.21 MI. N OF INT LA1143, Cameron, LA
Built 1998 Load: 42.6 t ADT: 2,575
LA0027
FairOver: CANAL
3.06 MI. N OF INT LA1143, Cameron, LA
Built 1998 Load: 42.6 t ADT: 2,575
LA0008
FairOver: GREENS CREEK
1.73 MI EAST OF US 84, Catahoula, LA
Built 1977 Load: 42.6 t ADT: 1,606
LA0009
FairOver: FRAZIER CREEK
4.8 MI NORTH OF LA 2, Claiborne, LA
Built 1975 Load: 42.6 t ADT: 2,360
I0110
FairOver: CHIPPEWA OFF RAMP (S.B.)
I0110, East Baton Rouge, LA
Built 1970 Load: 42.6 t ADT: 4,364
LA0010
FairOver: COLLINS CK.
4.7 M E of LA 10&LA 951, East Feliciana, LA
Built 1976 Load: 42.6 t ADT: 3,790
LA0682
FairOver: CREEK
0.39 MI NORTH OF LA 675, Iberia, LA
Built 1967 Load: 42.6 t ADT: 750
US0090
FairOver: WEST LACASSINE BAYOU
0.8 MI. E. OF LA 101, Jefferson Davis, LA
Built 1991 Load: 42.6 t ADT: 5,020
I0010
FairOver: MID BAYOU CHENE
3.2 MI E OF LA 395, Jefferson Davis, LA
Built 1965 Load: 42.6 t ADT: 838
I0010
FairOver: MID BAYOU CHENE
1.5 MI WEST OF LA 26, Jefferson Davis, LA
Built 1965 Load: 42.6 t ADT: 11,635
I0049
FairOver: COULEE BEAU BRIDGE CANAL
0.37 MI NORTH OF LA 726, Lafayette, LA
Built 1989 Load: 42.6 t ADT: 53,236
I0049
FairOver: COULEE BEAU BRIDGE CANAL
2.60 Mi S of La 182, Lafayette, LA
Built 1989 Load: 42.6 t ADT: 11,728
LA0024
FairOver: BAYOU BLUE
2.2 MI WEST OF LA 1, Lafourche, LA
Built 1979 Load: 42.6 t ADT: 5,271
US0090
FairOver: MC MAHON CANAL
.7 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 14,769
US0090
FairOver: MC MAHON CANAL
.7 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 13,535
US0090
FairOver: B.CUTOFF
1.4 MI WEST OF LA 1, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 14,769
Showing 5,901-5,950 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 |