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
FDR 354
GoodOver: MIKE BRANCH
NO DATA ENTERED, Natchitoches, LA
Built 2023 ADT: 50
FDR 570
GoodOver: RAGAN CREEK
NATIONAL FOREST ROAD, Natchitoches, LA
Built 2023 ADT: 50
FDR 570
GoodOver: RAGAN CREEK
NATIONAL FOREST ROAD, Natchitoches, LA
Built 2023 ADT: 50
FDR 570
GoodOver: RAGAN CREEK
NATIONAL FOREST ROAD, Natchitoches, LA
Built 2023 ADT: 50
FDR 249
GoodOver: LITTLE BAYOU CLEAR
NO DATA ENTERED, Rapides, LA
Built 2024 ADT: 50
FDR 272
GoodOver: LONG BRANCH
NO DATA ENTERED, Rapides, LA
Built 2024 ADT: 15
506
GoodOver: CYPRESS CR. TRIB.
NO DATA ENTERED, Winn, LA
Built 2003 ADT: 50
506
GoodOver: CYPRESS CR. TRIB.
NO DATA ENTERED, Winn, LA
Built 2003 ADT: 50
FDR 502
GoodOver: S. FORK MILE CR.
LOGMI 2.10 FR 428 TO, Winn, LA
Built 2023 ADT: 50
FDR 506Bridge
GoodOver: CYPRESS CREEK
LOGMI 0.79 FR 436 TO, Winn, LA
Built 2023 ADT: 50
FDR 520Bridge
GoodOver: KILLAN CREEK
5.94 MI FROM 5 TO 23, Winn, LA
Built 2023 ADT: 50
W Esplanade Ave S
GoodOver: ELMWOOD CANAL
0.6 MILE EAST OF POWER BL, Jefferson, LA
Built 2011 Load: 10.4 t
S.TALENS LNDNG RD.
GoodOver: LULU CANAL
6.0 MI S of LA 14, Cameron, LA
Built 1985 Load: 11.3 t ADT: 40
Sgt. Alfred Dr
GoodOver: CREEK
0.7 MILE SOUTH OF MI, St. Tammany, LA
Built 1970 Load: 11.3 t
S John M Hardy Dr
GoodOver: YOUNGS NORTH COULEE
0.1 Mi S of La 14, Vermilion, LA
Built 1970 Load: 11.3 t ADT: 2,000
Juniper Rd
GoodOver: ROBINS CANAL
0.7 Mi E of LA 3093, Vermilion, LA
Built 2011 Load: 11.8 t ADT: 46
N. Lake Rosemound
GoodOver: Bayou
3.8 Mi NW of U.S. 61, West Feliciana, LA
Built 2020 Load: 12.3 t ADT: 35
Janet Rd
GoodOver: DEVILS CREEK
LOGMI 0.06 FR ODE TO, LaSalle, LA
Built 1975 Load: 12.5 t
OLD BLANCHARD RD
GoodOver: CROSS BAYOU
0.39 MI SOUTH OF LA 173, Caddo, LA
Built 1987 Load: 12.6 t ADT: 6,323
Justice Ln.
GoodOver: COULEE
0.25 Mi S of La 95, Evangeline, LA
Built 2010 Load: 12.6 t ADT: 51
Wilderness Rd
GoodOver: CHICOT BAYOU
0.14 MI S of LA 3042, Evangeline, LA
Built 2007 Load: 13.3 t ADT: 18
Romeal Rd
GoodOver: SLEDGE CANAL
1.6 Mi W of Joe Rd, Vermilion, LA
Built 1977 Load: 13.9 t ADT: 150
Sidney Richard Rd.
GoodOver: LYONS POINT GULLY
0.45 MI SOUTH OF LA 92, Acadia, LA
Built 2015 Load: 14.5 t ADT: 24
CONNIE RD
GoodOver: POINTE AUX LOUPS BAYOU
0.9 Mi. W. of LA 91, Acadia, LA
Built 2016 Load: 14.5 t ADT: 192
ACORN DRIVE
GoodOver: OAK COULEE
0.9 miles E of LA 176, Lafayette, LA
Built 2016 Load: 14.5 t ADT: 200
Palmer Rd
GoodOver: RODERICK CREEK
0.6 MILES EAST OF LA.42, Livingston, LA
Built 2015 Load: 14.5 t ADT: 200
LA0620
GoodOver: STUMPY BAYOU
2.9 M W OF LA 983, West Baton Rouge, LA
Built 1958 Load: 14.5 t ADT: 2,107
LA0070
GoodOver: BELLE RIVER
0.01 Mi. S. of LA 1016-2, Assumption, LA
Built 2009 Load: 14.6 t ADT: 8,005
Coulee Rd.
GoodOver: Peebles Coulee
0.7 Mi. E. of La 83, Iberia, LA
Built 1972 Load: 14.6 t ADT: 78
SMITH CUT OFF RD
GoodOver: BESS BRANCH
0.4 MI. W. OF LA 109, Calcasieu, LA
Built 1994 Load: 14.7 t ADT: 290
Ellis Rd.
GoodOver: Long Point Gully
0.4 Mi. E. of La 13, Acadia, LA
Built 2011 Load: 14.8 t ADT: 288
Muskrat Rd.
GoodOver: Prime Gully
1.8 Mi. S. of La 1115, Acadia, LA
Built 2011 Load: 14.8 t ADT: 10
LA0003
GoodOver: KCS RR XING
.38 MILES NORTH OF I-20, Bossier, LA
Built 2008 Load: 14.9 t ADT: 21,505
LA0083
GoodOver: PATOUT BAYOU
4.2 Mi N. of LA 319, Iberia, LA
Built 2012 Load: 15.2 t ADT: 5,447
Riverside Rd
GoodOver: Coulee
0.87 MI. S of JCT LA 1123, Acadia, LA
Built 2018 Load: 15.4 t ADT: 192
Antrim Rd
GoodOver: Lil Cypress Creek
1.0 MI E OF HWY 3, Bossier, LA
Built 1987 Load: 15.4 t ADT: 100
Provost Rd
GoodOver: COULEE
0.40 Mi S of Caroline St, Lafayette, LA
Built 2012 Load: 15.4 t ADT: 1,200
Monticello Ave
GoodOver: PALMETTO CANAL
O.0MI.N.OF NORTHLINE, Orleans, LA
Built 1960 Load: 15.4 t
US0171
GoodOver: CREEK
8.5 MI NORTH OF LA 110, Beauregard, LA
Built 1931 Load: 15.9 t ADT: 8,463
US0190
GoodOver: DRAIN
0.5 M W OF LA 43, Livingston, LA
Built 1932 Load: 15.9 t ADT: 4,992
W. Beech Rd
GoodOver: Coulee
1.5 Mi E of Farmers Rd, Vermilion, LA
Built 2023 Load: 15.9 t ADT: 50
US0171
GoodOver: INDIAN BAYOU
10.6 MI NORTH OF LA 378, Beauregard, LA
Built 1932 Load: 16.2 t ADT: 12,466
LA0142
GoodOver: CREEK
1.6 MI NORTH OF US 425, Morehouse, LA
Built 1950 Load: 16.2 t ADT: 4,706
Shannon Dr
GoodOver: LITTLE BAYOU PIPE
US190 3.2 MI E LA 434, St. Tammany, LA
Built 1995 Load: 16.2 t ADT: 100
LA0008
GoodOver: BRUSHLEY BAYOU
0.59 M E of LA 772, Catahoula, LA
Built 1994 Load: 16.3 t ADT: 1,527
Floodgate Crossing
GoodOver: BAYOU DES GLAISES
APP. 0.10 M. E. OF LA 451, Avoyelles, LA
Built 1960 Load: 16.5 t ADT: 260
Firetower Rd
GoodOver: Ford Creek
0.2M E of Springridge Rd, Catahoula, LA
Built 1972 Load: 16.8 t ADT: 90
DUPLANTIS BRIDGE
GoodOver: PETIT CAILLOU BAYOU
0144 LOG MI FROM IN, Terrebonne, LA
Built 1973 Load: 16.8 t ADT: 5,180
LA0083
GoodOver: STUMPY BAYOU
5.5 MI N OF LA 319, Iberia, LA
Built 2011 Load: 17.2 t ADT: 3,078
E. Refinery Rd.
GoodOver: TECHE BAYOU
0.12 MI. EAST OF LA 31, St. Martin, LA
Built 2010 Load: 17.2 t ADT: 2,508
Showing 6,701-6,750 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 |