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
I0055
GoodOver: SWAMP
0.1 M W OF US 51, St. John the Baptist, LA
Built 1975 Load: 39.0 t ADT: 28,021
I0049
GoodOver: E. Grolee St
0.13 MI N of US 190, St. Landry, LA
Built 1983 Load: 39.0 t ADT: 15,642
I0010
GoodOver: BAYOU TECHE
5.9 Mi. East of I-49, St. Martin, LA
Built 1970 Load: 39.0 t ADT: 50,425
I0010
GoodOver: BAYOU TECHE
0.7 MI WEST OF LA 328, St. Martin, LA
Built 1970 Load: 39.0 t ADT: 4,908
LA0182
GoodOver: YOKELY BAYOU
0.26 MI S of LA 3211, St. Mary, LA
Built 2001 Load: 39.0 t ADT: 6,242
US0090
GoodOver: WAX LAKE OUTLET
0.6 MI EAST OF LA 182, St. Mary, LA
Built 1995 Load: 39.0 t ADT: 7,885
US0090
GoodOver: RAMP 'N'
0.05 MI E OF DR. MLK BLVD, St. Mary, LA
Built 1984 Load: 39.0 t ADT: 12,192
I0012
GoodOver: I-12 OVER PAR RD ROLLINS
0.9 M W OF US 11, St. Tammany, LA
Built 1970 Load: 39.0 t ADT: 29,236
LA0038
GoodOver: SLOUGH
0.65 MI. EAST OF US 51, Tangipahoa, LA
Built 1974 Load: 39.0 t ADT: 3,120
LA0038
GoodOver: TANG. R. W.RELIEF
LA0038, Tangipahoa, LA
Built 1975 Load: 39.0 t ADT: 3,120
LA0038
GoodOver: TANGIPAHOA RIVER E RELIE
LA0038, Tangipahoa, LA
Built 1975 Load: 39.0 t ADT: 3,120
LA1053
GoodOver: HAW BRANCH
4.7 MI N-W US 51 INTER., Tangipahoa, LA
Built 1996 Load: 39.0 t ADT: 595
LA1053
GoodOver: LINE CREEK
5.3 MI NW US 51 INTER., Tangipahoa, LA
Built 1996 Load: 39.0 t ADT: 595
LA0896
GoodOver: LAKE ST PETER DR CANAL
.67 MI WEST OF LA 568, Tensas, LA
Built 1979 Load: 39.0 t ADT: 88
LA0605
GoodOver: CLARK BAYOU
4.8 MI EAST OF US 65, Tensas, LA
Built 1984 Load: 39.0 t ADT: 499
N. BAYOU BLACK DR.
GoodOver: DONNER CANAL
1.2 MI NW OF LA.20, Terrebonne, LA
Built 2017 Load: 39.0 t ADT: 1,256
BUQUET STREET
GoodOver: BAYOU TERREBONNE
0.01 MI E OF LA 24, Terrebonne, LA
Built 2017 Load: 39.0 t ADT: 4,724
LA0024
GoodOver: B TERREBONNE / AUTIN DR.
LA0024, Terrebonne, LA
Built 1974 Load: 39.0 t ADT: 259
LA0024
GoodOver: BAYOU TERREBONNE
LA0024, Terrebonne, LA
Built 1974 Load: 39.0 t ADT: 259
LA0024
GoodOver: BAYOU TERREBONNE
LA0024, Terrebonne, LA
Built 1974 Load: 39.0 t ADT: 259
LA0182
GoodOver: BORROW CANAL
.01 MI EAST OF LA 662, Terrebonne, LA
Built 1993 Load: 39.0 t ADT: 3,905
LA0008
GoodOver: DEVILS CREEK
7.59 MI E JCT LA 465&LA8, Vernon, LA
Built 2003 Load: 39.0 t ADT: 5,978
LA0008
GoodOver: DEVILS CREEK
7.65 MI E JCT LA 465& LA8, Vernon, LA
Built 2003 Load: 39.0 t ADT: 5,978
LA0465
GoodOver: BLACKJACK BRANCH
1.54 M E OF JCT LA 117, Vernon, LA
Built 1999 Load: 39.0 t ADT: 115
LA0465
GoodOver: COMRADE CREEK RELIEF
7.44 M. E. OF JCT LA 117, Vernon, LA
Built 1999 Load: 39.0 t ADT: 171
LA0465
GoodOver: COMRADE CREEK
7.55 M. E. OF JCT LA 117, Vernon, LA
Built 1999 Load: 39.0 t ADT: 171
LA0465
GoodOver: COMRADE CREEK RELIEF
7.75 M. E. OF JCT. LA 117, Vernon, LA
Built 1999 Load: 39.0 t ADT: 171
LA0489
GoodOver: CALCASIEU RIVER
4.89 MI. N. OF LA 121, Vernon, LA
Built 1999 Load: 39.0 t ADT: 639
LA0489
GoodOver: CALCASIEU RIVER RELIEF
5.18 M N OF LA 121, Vernon, LA
Built 1999 Load: 39.0 t ADT: 639
LA0582
GoodOver: MILL BAYOU
2.6 MI E of LA 17, West Carroll, LA
Built 1983 Load: 39.0 t ADT: 593
US0084
GoodOver: BRUSHY CREEK
2.9 MI EAST OF LA 34, Winn, LA
Built 2003 Load: 39.0 t ADT: 2,526
US0084
GoodOver: BRUSHY CREEK
3.10 MI EAST OF LA 34, Winn, LA
Built 2003 Load: 39.0 t ADT: 2,526
US0084
GoodOver: CREEK
3.16 MI EAST OF LA 34, Winn, LA
Built 2003 Load: 39.0 t ADT: 2,526
US0084
GoodOver: CREEK
1.5 MI EAST OF LA 124, Winn, LA
Built 2003 Load: 39.0 t ADT: 891
US0084
GoodOver: BIG BRANCH
2.4 MI EAST OF LA 124, Winn, LA
Built 2003 Load: 39.0 t ADT: 891
LA0126
GoodOver: BIG CREEK
.6 MI EAST OF LA 1234, Winn, LA
Built 1992 Load: 39.0 t ADT: 742
LA0499
GoodOver: BEECH CREEK
7.28 MI EAST OF LA 34, Winn, LA
Built 1995 Load: 39.0 t ADT: 394
LA0499
GoodOver: FLAT CREEK
1.02 MI NTH. JCT. LA126, Winn, LA
Built 1996 Load: 39.0 t ADT: 114
LA0499
GoodOver: TURKEY CREEK
3.65 MI NORTH OF LA 126, Winn, LA
Built 1996 Load: 39.0 t ADT: 114
LA0499
GoodOver: SPRING CREEK
4.71 MI NORTH JCT LA 126, Winn, LA
Built 1997 Load: 39.0 t ADT: 114
LA0499
GoodOver: TURKEY CREEK
5.01 MI. NORTH OF LA 126, Winn, LA
Built 1997 Load: 39.0 t ADT: 114
LA0505
GoodOver: BIG CREEK
6.47 MI WEST OF US 167, Winn, LA
Built 1996 Load: 39.0 t ADT: 511
S Ave H
GoodOver: BLANC BAYOU
0.82 MI. SOUTH OF US 90, Acadia, LA
Built 2014 Load: 39.2 t ADT: 480
US0080
GoodOver: KCS RR
2.5 MI. E. OF I-20, Bienville, LA
Built 2016 Load: 39.2 t ADT: 780
LA0523
GoodOver: BAYOU PIERRE
1.82 W. OF JCT OF LA1, Caddo, LA
Built 2011 Load: 39.2 t ADT: 12,580
Jefferson Page Rd
GoodOver: PAGE BAYOU
5.0 MI. WEST OF US 80, Caddo, LA
Built 2002 Load: 39.2 t ADT: 60
Blount Rd
GoodOver: CREEK
ON BLOUNT RD BETWEEN LA 6, East Baton Rouge, LA
Built 2010 Load: 39.2 t ADT: 4,167
Central Throughway
GoodOver: BEAVER BAYOU
1.0 MI S. OF LA37, East Baton Rouge, LA
Built 2011 Load: 39.2 t ADT: 10,400
Port Rd
GoodOver: Commercial Canal
0.83 Mi W of La 83, Iberia, LA
Built 2013 Load: 39.2 t ADT: 2,313
Joe Yenni BLVD
GoodOver: DUNCAN CANAL
0.6M W OF WILLIAMS BLVD, Jefferson, LA
Built 1993 Load: 39.2 t ADT: 1,000
Showing 9,701-9,750 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 |