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
I0049
FairOver: I-49,KCS RR SPUR
6.21 MI N OF LA 509 INTG, De Soto, LA
Built 1987 Load: 39.9 t ADT: 29,022
I0049
FairOver: KCS RR SPUR
6.22 MI N OF LA 509 INTG, De Soto, LA
Built 1987 Load: 39.9 t ADT: 28,142
I0049
FairOver: SYLVEST CREEK
1.3 MI. N. OF LA 175 INTG, De Soto, LA
Built 1986 Load: 39.9 t ADT: 29,022
I0049
FairOver: SYLVEST CREEK
1.3 MI N OF LA 175 INTG, De Soto, LA
Built 1986 Load: 39.9 t ADT: 28,142
I0012
FairOver: CREEK
1.0 M W of US 61, East Baton Rouge, LA
Built 1964 Load: 39.9 t ADT: 8,250
US0061-X
FairOver: MONTE SANO BAYOU
1.04 M. N OF LA 3164, East Baton Rouge, LA
Built 1971 Load: 39.9 t ADT: 6,150
LA0019
FairOver: SOUTH CANAL
LA 19, East Baton Rouge, LA
Built 1988 Load: 39.9 t ADT: 15,812
LA0019
FairOver: SOUTH CANAL
LA 19, East Baton Rouge, LA
Built 1988 Load: 39.9 t ADT: 19,515
I0110
FairOver: CHIPPEWA OFF RAMP
I0110, East Baton Rouge, LA
Built 1970 Load: 39.9 t ADT: 8,250
LA3277
FairOver: DRAIN
4.45 MI NORTH OF LA 1157, Evangeline, LA
Built 1959 Load: 39.9 t ADT: 759
LA0500
FairOver: KEES BRANCH
1.7 MI WEST OF US 165, Grant, LA
Built 1998 Load: 39.9 t ADT: 620
US0090
FairOver: RODERE CANAL
0.6 Mi E of LA 329, Iberia, LA
Built 1999 Load: 39.9 t ADT: 1,856
LA0988
FairOver: DOW DRAINAGE
0.3 MI N OF LA 1148, Iberville, LA
Built 1958 Load: 39.9 t ADT: 2,205
LA0988
FairOver: BAYOU BOURBEU
0.6 MI N of LA 1148, Iberville, LA
Built 1958 Load: 39.9 t ADT: 2,205
LA0004
FairOver: DUGDEMONA RIVER
6.28 MI WEST OF US 167, Jackson, LA
Built 1976 Load: 39.9 t ADT: 3,086
LA0045
FairOver: FLEMINGS CANAL
3.0 MI SOUTH OF LA 301, Jefferson, LA
Built 1989 Load: 39.9 t ADT: 6,709
Hammond HWY
FairOver: 17TH ST. CANAL
2 MI N OF VETERANS BLVD, Jefferson, LA
Built 2005 Load: 39.9 t ADT: 22,600
US0165
FairOver: BAYOU
3.6 MI. S OF LA 3086, Jefferson Davis, LA
Built 2008 Load: 39.9 t ADT: 8,453
US0165
FairOver: BAYOU
1.5 MI N of LA 102, Jefferson Davis, LA
Built 2008 Load: 39.9 t ADT: 8,453
US0165
FairOver: LITTLE BAYOU
1.2 MI S of LA 102, Jefferson Davis, LA
Built 2008 Load: 39.9 t ADT: 8,453
I0010
FairOver: W. LACASSINE BAYOU
1.2 MI E OF LA 101, Jefferson Davis, LA
Built 1964 Load: 39.9 t ADT: 162
I0010
FairOver: W. LACASSINE BAYOU
1.20 MI E OF LA 101, Jefferson Davis, LA
Built 1964 Load: 39.9 t ADT: 606
NORTH FRONTAGE RD
FairOver: E. LACASSINE BAYOU
6.4 MI. E OF LA 101, Jefferson Davis, LA
Built 1964 Load: 39.9 t ADT: 606
LA0382
FairOver: BAYOU CHENE
3.8 MI NORTH OF LA 380, Jefferson Davis, LA
Built 1993 Load: 39.9 t ADT: 527
US0090
FairOver: Indian Bayou
0.7 MI EAST OF LA 343, Lafayette, LA
Built 1963 Load: 39.9 t ADT: 9,189
I0010
FairOver: VERMILION RIVER
2.0 Mi E of I-49, Lafayette, LA
Built 1970 Load: 39.9 t ADT: 56,748
I0010
FairOver: VERMILION RIVER
3.48 Mi W of LA 31, Lafayette, LA
Built 1970 Load: 39.9 t ADT: 2,969
I0049
FairOver: COULEE BEAU BRIDGE CANAL
0.37 MI NORTH OF LA 726, Lafayette, LA
Built 1989 Load: 39.9 t ADT: 717
I0049
FairOver: COULEE BEAU BRIDGE CANAL
2.60 Mi S of La 182, Lafayette, LA
Built 1989 Load: 39.9 t ADT: 1,174
LA0733
FairOver: CREEK
1.87 MI EAST OF US 167, Lafayette, LA
Built 1966 Load: 39.9 t ADT: 15,593
LA3184
FairOver: BNSF/Walker Rd
0.1 MI N of US 90, Lafayette, LA
Built 1983 Load: 39.9 t ADT: 39,201
LA0304
FairOver: BAYOU L'ONION
5.72 MI NORTH OF LA 308, Lafourche, LA
Built 1980 Load: 39.9 t ADT: 1,518
LA0648
FairOver: BAYOU LAFOURCHE
0.01 M WEST OF LA 308, Lafourche, LA
Built 1991 Load: 39.9 t ADT: 9,183
LA0002
FairOver: BONNE IDEE BAYOU
4.58 MI EAST OF US 165, Morehouse, LA
Built 1977 Load: 39.9 t ADT: 2,598
LA0134
FairOver: BAYOU COULEE
2 MI EAST OF LA 138, Morehouse, LA
Built 1978 Load: 39.9 t ADT: 1,183
LA0134
FairOver: BAYOU GALLION
2.4 MI EAST OF LA 134, Morehouse, LA
Built 1978 Load: 39.9 t ADT: 1,183
VINEY WOODS RD
FairOver: BAYOU BONN IDEE
5.8 MI NE of LA 134, Morehouse, LA
Built 1999 Load: 39.9 t ADT: 200
LA0487
FairOver: HOLLIS CREEK
6.03 MI. N OF LA120, Natchitoches, LA
Built 1989 Load: 39.9 t ADT: 968
I0049
FairOver: COMITTE BAYOU
1.04 MI. SOUTH OF LA 119, Natchitoches, LA
Built 1984 Load: 39.9 t ADT: 18,305
I0510
FairOver: DRAIN DITCH
0.2 MI SE OF CHEF MENTEUR, Orleans, LA
Built 1993 Load: 39.9 t ADT: 5,721
US0011
FairOver: DRAIN CANAL
4.02 MI NORTH OF US 90, Orleans, LA
Built 1978 Load: 39.9 t ADT: 3,912
I0610
FairOver: HOSPITAL ST.
1.7 MI EAST OF I-10, Orleans, LA
Built 1973 Load: 39.9 t ADT: 105,572
I0010
FairOver: CITY STREETS/RR
2.6 MI EAST OF LA 39, Orleans, LA
Built 1992 Load: 39.9 t ADT: 11,650
I0010
FairOver: OFF RAMP I-10W.
2.8 MI EAST OF LA 39, Orleans, LA
Built 1966 Load: 39.9 t ADT: 1,754
US0080
FairOver: YOUNGS BAYOU
.5 MI WEST OF LA 840-6, Ouachita, LA
Built 1935 Load: 39.9 t ADT: 17,683
LA0139
FairOver: CREEK
.6 MI NORTH OF LA 594, Ouachita, LA
Built 1937 Load: 39.9 t ADT: 15,958
I0020
FairOver: DRAIN
1.1 MI EAST OF US 165, Ouachita, LA
Built 1968 Load: 39.9 t ADT: 84,225
LA8406
FairOver: BAYOU DESIARD
2.67 MI NE of N 18TH ST, Ouachita, LA
Built 1995 Load: 39.9 t ADT: 15,737
MORGAN HARE RD
FairOver: LONG BRANCH TRIB
0.8 MI NW of LA 139, Ouachita, LA
Built 1993 Load: 39.9 t ADT: 278
LA0023
FairOver: BAYOU BARRIERE
.3 MI SOUTH OF LA 428, Plaquemines, LA
Built 1955 Load: 39.9 t ADT: 29,088
Showing 5,551-5,600 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 |