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
LA1216
FairOver: DITCH
8.7 MI EAST OF US 171, Sabine, LA
Built 1966 Load: 21.7 t ADT: 209
LA0737
FairOver: GRAND CANAL 02
0.16 MI EAST OF LA 686, St. Martin, LA
Built 1973 Load: 21.7 t ADT: 575
Section 28 Rd
FairOver: MARTIN BAYOU
1.6 MI E of LA 3039, St. Martin, LA
Built 2003 Load: 21.7 t ADT: 608
Zenor Bridge Rd
FairOver: TECHE BAYOU
0.05 Mi NW of LA 182, St. Mary, LA
Built 1969 Load: 21.7 t ADT: 200
Centerville Br Rd.
FairOver: TECHE BAYOU
0.1 Mi N of La 182, St. Mary, LA
Built 1972 Load: 21.7 t ADT: 575
Sorrel Bridge Rd
FairOver: TECHE BAYOU
0.2 Mi N of LA 182, St. Mary, LA
Built 1972 Load: 21.7 t ADT: 250
US0051
FairOver: CARPENTER BRANCH
0.1 M N OF LA 10, Tangipahoa, LA
Built 1956 Load: 21.7 t ADT: 2,199
LA0057
FairOver: DULAC BAYOU
8 MI NORTH OF LA 56, Terrebonne, LA
Built 1971 Load: 21.7 t ADT: 952
Coldwater
FairOver: COLDWATER CREEK
1.37 MI. WEST OF LA 156, Winn, LA
Built 1970 Load: 21.7 t ADT: 288
LA0013
FairOver: QUEUE DE TORTUE BAYOU
1.0 MI SOUTH OF LA 1115, Acadia, LA
Built 1952 Load: 21.8 t ADT: 4,668
LA0098
FairOver: CREEK
0.21 MI EAST OF LA 1120, Acadia, LA
Built 1950 Load: 21.8 t ADT: 773
LA0100
FairOver: B DES CANNES EVNG
1.5 Mi. E. of LA 97, Acadia, LA
Built 1951 Load: 21.8 t ADT: 1,128
LA0365
FairOver: BAYOU PLAQUEMINE
2.1 MI EAST OF LA 367, Acadia, LA
Built 1952 Load: 21.8 t ADT: 1,570
LA0383
FairOver: KINDER DITCH
4.7 MI W OF US 165, Allen, LA
Built 1959 Load: 21.8 t ADT: 2,193
LA1010
FairOver: BAYOU LAFOURCHE
LA1010, Assumption, LA
Built 1954 Load: 21.8 t ADT: 143
US0171
FairOver: BRUSH BAYOU
0.1 MI. S. OF LA 511, Caddo, LA
Built 1960 Load: 21.8 t ADT: 16,911
LA0170
FairOver: CREEK
3.1 MI EAST OF LA 1, Caddo, LA
Built 1930 Load: 21.8 t ADT: 1,209
US0090
FairOver: KAYOUCHE COULEE
0.3 MI. E. OF LA 14, Calcasieu, LA
Built 1957 Load: 21.8 t ADT: 4,199
LA0019
FairOver: REDWOOD CREEK
LA0019, East Feliciana, LA
Built 1949 Load: 21.8 t ADT: 4,697
LA0010
FairOver: MORRIS BRANCH
1.4 MI WEST OF LA 106, Evangeline, LA
Built 1950 Load: 21.8 t ADT: 3,308
LA0010
FairOver: BEAVER CREEK
0.4 MI S OF LA 106, Evangeline, LA
Built 1950 Load: 21.8 t ADT: 1,571
LA0015
FairOver: STOKES BAYOU
.7 MI NORTH OF LA 3210, Franklin, LA
Built 1979 Load: 21.8 t ADT: 6,896
LA0329
FairOver: RODERE CANAL
0.10 MI SOUTH OF LA 14, Iberia, LA
Built 1953 Load: 21.8 t ADT: 2,419
LA3182
FairOver: BAYOU TECHE
0.08 MI EAST OF LA 182, Iberia, LA
Built 1980 Load: 21.8 t ADT: 1,390
BERKEN ROAD
FairOver: GRAND MARAIS BAYOU
1.5 MI. N. of LA 1126, Jefferson Davis, LA
Built 1978 Load: 21.8 t ADT: 40
BRYAN ROAD
FairOver: GULLY
0.2 MI. W. of LA 99, Jefferson Davis, LA
Built 1978 Load: 21.8 t ADT: 30
BRYAN ROAD
FairOver: GULLY
0.7 MI W of LA 99, Jefferson Davis, LA
Built 1978 Load: 21.8 t ADT: 30
LA0442
FairOver: L NATALBANY RIVER
LA0442, Livingston, LA
Built 1962 Load: 21.8 t ADT: 5,026
LA0835
FairOver: COFFEE BAYOU
8.36 MI EAST OF US 165, Morehouse, LA
Built 1963 Load: 21.8 t ADT: 366
LA0835
FairOver: CREEK
9.87 MI EAST OF US 165, Morehouse, LA
Built 1963 Load: 21.8 t ADT: 366
US0080
FairOver: BROWNLEE CREEK
.6 MI EAST OF I-20, Ouachita, LA
Built 1951 Load: 21.8 t ADT: 3,275
US0080
FairOver: PATRICK CREEK
2.7 MI EAST OF I-20, Ouachita, LA
Built 1951 Load: 21.8 t ADT: 3,275
US0167X
FairOver: HORSESHOE CANAL
1.11 MI. NE OF US 71, Rapides, LA
Built 1958 Load: 21.8 t ADT: 9,641
LA0112
FairOver: DIV CANAL LECOMPTE
8.18 MI. E OF INT US165, Rapides, LA
Built 1952 Load: 21.8 t ADT: 2,304
LA0300
FairOver: REGGIO CANAL
1.2 MI S OF LA 46, St. Bernard, LA
Built 1957 Load: 21.8 t ADT: 728
LA0448
FairOver: GREASY CREEK
LA0448, St. Helena, LA
Built 1962 Load: 21.8 t ADT: 547
LA1036
FairOver: EAST SPRING BRANCH
LA1036, St. Helena, LA
Built 1962 Load: 21.8 t ADT: 601
LA1036
FairOver: BEAR CREEK
LA1036, St. Helena, LA
Built 1962 Load: 21.8 t ADT: 601
US0011
FairOver: BAYOU POTASSAY
0.2 M N OF LA 433, St. Tammany, LA
Built 1951 Load: 21.8 t ADT: 15,201
LA1077
FairOver: TCHEFUNCTE RIVER
LA1077, St. Tammany, LA
Built 1957 Load: 21.8 t ADT: 883
LA0442
FairOver: PARKER BAYOU
LA0442, Tangipahoa, LA
Built 1963 Load: 21.8 t ADT: 5,026
Chappepeela Rd
FairOver: CHAPPEPEELA RELIEF
0.3 MI. W OF LA. 445, Tangipahoa, LA
Built 1990 Load: 21.8 t ADT: 1,145
New Genessee Rd
FairOver: CREEK
2.6 MI SE OF LA 442, Tangipahoa, LA
Built 1978 Load: 21.8 t ADT: 800
LA0892
FairOver: CHOCTAW BAYOU
.2 MI EAST OF LA 573, Tensas, LA
Built 1952 Load: 21.8 t ADT: 109
LA0182
FairOver: CARO CANAL
.06 MI WEST OF LA 316, Terrebonne, LA
Built 1957 Load: 21.8 t ADT: 3,687
LA0014
FairOver: BIG FOUR CANAL
3.1 miles West of LA 91, Vermilion, LA
Built 1958 Load: 21.8 t ADT: 1,717
LA0014
FairOver: ELLIOT DITCH
2.1 MI W. OF LA 91, Vermilion, LA
Built 1958 Load: 21.8 t ADT: 1,717
LA0014
FairOver: AVRICO CANAL
1.24 MI W. OF LA 91, Vermilion, LA
Built 1952 Load: 21.8 t ADT: 3,212
LA0014
FairOver: MARE MICHELE
1.2 MI W. OF LA 711, Vermilion, LA
Built 1952 Load: 21.8 t ADT: 3,212
PARISH RD 685
FairOver: BAYOU TIGRE
0.78 MI S. OF LA 14, Vermilion, LA
Built 1961 Load: 21.8 t ADT: 1,298
Showing 2,251-2,300 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 |