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
CORINNE DR
GoodOver: 20 ARPENT CANAL
0.5 MILE NORTH OF JUDGE P, St. Bernard, LA
Built 2010 Load: 36.3 t ADT: 881
I0310
GoodOver: RR/CANAL
0.25 M SOUTH OF US 61, St. Charles, LA
Built 1992 Load: 36.3 t ADT: 15,642
Loyd Collins Rd
GoodOver: CREEK
0.8 MILES NORTH OF LA 38, St. Helena, LA
Built 2007 Load: 36.3 t ADT: 250
Chretien Point Rd.
GoodOver: BAYOU BOURBE
1.2 Mi NE of LA 356, St. Landry, LA
Built 1997 Load: 36.3 t ADT: 520
Bellard Loop
GoodOver: Drainage Canal
0.25 MI E of LA 35, St. Landry, LA
Built 2002 Load: 36.3 t ADT: 200
Threatt St.
GoodOver: RICHARDS GULLY
0.10 Mi S of LA 29, St. Landry, LA
Built 2005 Load: 36.3 t ADT: 200
Nezat Rd.
GoodOver: BAYOU LITTLE TECHE
0.05 MI W of LA 743, St. Landry, LA
Built 2005 Load: 36.3 t ADT: 410
LA0686
GoodOver: CREEK
0.16 MI NORTH OF LA 737, St. Martin, LA
Built 2013 Load: 36.3 t ADT: 3,212
LA0021
GoodOver: BOGUE CHITTO RV. RELIEF
0.9 M N OF LA 41, St. Tammany, LA
Built 1975 Load: 36.3 t ADT: 8,257
LA0040
GoodOver: DRAIN
0.9 M E OF LA 25, St. Tammany, LA
Built 1978 Load: 36.3 t ADT: 3,689
I0055
GoodOver: PONCHATOULA CR.
I0055, Tangipahoa, LA
Built 1960 Load: 36.3 t ADT: 39,850
I0055
GoodOver: PONCHATOULA CR.
I0055, Tangipahoa, LA
Built 1960 Load: 36.3 t ADT: 21,736
LA0655
GoodOver: ISLE JEAN CHARLES CANAL
8.51 MI S OF LA 55, Terrebonne, LA
Built 1988 Load: 36.3 t ADT: 2,337
Roy Rd
GoodOver: Coulee
0.01 Mi S. of Placide Rd, Vermilion, LA
Built 2022 Load: 36.3 t ADT: 100
Humble Rd
GoodOver: MOON ISLAND CANAL
0.01 Mi W of La 91, Vermilion, LA
Built 2013 Load: 36.3 t ADT: 73
LA0464
GoodOver: WOLF CREEK
3.67 MI. S. JCT. LA 8, Vernon, LA
Built 1993 Load: 36.3 t ADT: 856
LA0465
GoodOver: YELLOW BRANCH
1.05 MI. EAST OF LA 28, Vernon, LA
Built 1994 Load: 36.3 t ADT: 500
LA0458
GoodOver: SIX MILE CREEK
4.06 MI. EAST OF LA 399, Vernon, LA
Built 1994 Load: 36.3 t ADT: 250
LA0008
GoodOver: BAYOU CASTOR
2.4 MILES EAST OF US 171, Vernon, LA
Built 2006 Load: 36.3 t ADT: 7,277
LA0008
GoodOver: BAYOU CASTOR
2.4 MILE EAST OF US 171, Vernon, LA
Built 2006 Load: 36.3 t ADT: 4,268
LA0008
GoodOver: LITTLE PRAIRIE CREEK
1 MILE EAST OF US 171, Vernon, LA
Built 2006 Load: 36.3 t ADT: 7,277
LA0008
GoodOver: LITTLE PRAIRIE CREEK
1 MILE EAST OF US 171, Vernon, LA
Built 2006 Load: 36.3 t ADT: 4,268
Nobles Cemt. Rd
GoodOver: CREEK
1 MILE WEST OF LA 424, Washington, LA
Built 2013 Load: 36.3 t ADT: 993
PRK ROAD
GoodOver: CREEK
4.20 MILES EAST OF LA 25, Washington, LA
Built 2010 Load: 36.3 t
LA0010
GoodOver: BOGUE CHITTO RIVER
0.7 MI E LA 10 & LA 440, Washington, LA
Built 1997 Load: 36.3 t ADT: 12,018
LA0016
GoodOver: WELLS CREEK
2.7M NW ST TAMMANY LINE, Washington, LA
Built 1993 Load: 36.3 t ADT: 1,137
LA0016
GoodOver: MILLER CREEK
4.1M NW ST TAMMANY LINE, Washington, LA
Built 1993 Load: 36.3 t ADT: 1,137
LA0016
GoodOver: JOHNSON BRANCH
6.3M NW ST TAMMANY PH LN, Washington, LA
Built 1993 Load: 36.3 t ADT: 1,137
LA0016
GoodOver: CREEK
6.8M NW ST TAMMANY LINE, Washington, LA
Built 1993 Load: 36.3 t ADT: 1,137
ARKADELPHIA RD
GoodOver: GASKINS BRANCH
4.1 MILES NORTH OF LA 112, Allen, LA
Built 2011 Load: 36.6 t ADT: 260
Camp Dr
GoodOver: CAMP ROAD
2.8 MI ENE-LA427 US61 JCT, Ascension, LA
Built 2000 Load: 36.6 t ADT: 50
Pine Grove Rd
GoodOver: BRUSH CREEK
0.4 MI N OF LA 4, Bienville, LA
Built 2010 Load: 36.6 t ADT: 250
LA0506
GoodOver: LITTLE BLACK BAYOU
0.03 M E of US 165, Caldwell, LA
Built 2004 Load: 36.6 t ADT: 411
Lyons Hill
GoodOver: CANEY CREEK
0.15 MI. S. OF US 79 ON L, Claiborne, LA
Built 2016 Load: 36.6 t ADT: 125
Harriet Quimby Ave
GoodOver: MONTE SANO BAYOU
1.1 M N OF LA 408, East Baton Rouge, LA
Built 1984 Load: 36.6 t ADT: 100
GREENBRIAR RD
GoodOver: JOES BAYOU
0.4 MI EAST OF HWY 579, East Carroll, LA
Built 1987 Load: 36.6 t ADT: 115
Bayou Des Cannes R
GoodOver: DES CANNES BAYOU
0.9 MI N of LA 1163, Evangeline, LA
Built 1996 Load: 36.6 t ADT: 85
Choboy Lake Rd.
GoodOver: GRAND LOUIS BAYOU
1.03 Mi SE of Beiber Rd, Evangeline, LA
Built 1985 Load: 36.6 t ADT: 30
LA0555
GoodOver: BAYOU MACON
0.05 M N of LA 610, Franklin, LA
Built 2003 Load: 36.6 t ADT: 562
Green Light Rd.
GoodOver: TURKEY CREEK
1.6 M. E OF DUMMY LINE RD, Franklin, LA
Built 1995 Load: 36.6 t ADT: 60
Willett Loop Rd
GoodOver: Bear Branch
1.5 Ml SE of La 123, Grant, LA
Built 2017 Load: 36.6 t ADT: 44
Seymour Migues Rd
GoodOver: Deblanc Coulee
0.7 Mi. North of LA 676, Iberia, LA
Built 1985 Load: 36.6 t ADT: 356
Choupique Rd
GoodOver: Canal
1.5 Mi. S. of La 3242, Iberia, LA
Built 1985 Load: 36.6 t ADT: 69
US0167
GoodOver: CYPRESS CREEK RELIEF
18.65 MI N WINN PARISH LN, Jackson, LA
Built 2008 Load: 36.6 t ADT: 8,681
US0165
GoodOver: BAYOU ARCENEAUX
2.5 MI N of LA 101, Jefferson Davis, LA
Built 2008 Load: 36.6 t ADT: 8,453
LA0339
GoodOver: Creek
2.8 Mi N. of La 338, Lafayette, LA
Built 2022 Load: 36.6 t ADT: 4,990
Beau Bassin Rd.
GoodOver: GASTON COULEE
2.6 MI N of LA 98, Lafayette, LA
Built 2011 Load: 36.6 t ADT: 145
Guillot Rd.
GoodOver: COULEE
1.0 MI S of LA 89, Lafayette, LA
Built 1991 Load: 36.6 t ADT: 440
Lydia St
GoodOver: HOLLYWOOD CANAL
0.48 M FROM INT 250, Lafourche, LA
Built 1991 Load: 36.6 t ADT: 131
T-BOIS BRIDGE RD
GoodOver: BAYOU LAFOURCHE
0.01 N. of LA 1, Lafourche, LA
Built 2007 Load: 36.6 t ADT: 1,928
Showing 9,251-9,300 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 |