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
Blossom Rd
GoodOver: DRAINAGE BAYOU
2.50 Mi SE of LA 35, St. Landry, LA
Built 2005 Load: 32.4 t ADT: 200
Lakeview Dr.
GoodOver: Drainage Bayou
0.17 Mi E of I-49, St. Landry, LA
Built 1994 Load: 32.4 t ADT: 150
Desiree Rd
GoodOver: WEST FORK BAYOU
0.48 Mi SW of US 190, St. Landry, LA
Built 2000 Load: 32.4 t ADT: 330
Goyo Rd.
GoodOver: DRAINAGE BAYOU
0.6 MI NE of LA 363, St. Landry, LA
Built 2000 Load: 32.4 t ADT: 550
LA0096
GoodOver: CREEK
5.5 Mi. East of LA 182, St. Martin, LA
Built 2007 Load: 32.4 t ADT: 6,714
LA0096
GoodOver: CREEK
6.3 Mi. East of LA 182, St. Martin, LA
Built 2007 Load: 32.4 t ADT: 6,714
LA0096
GoodOver: POINTE CLAIRE COULEE
1.17M EAST OF LA 347, St. Martin, LA
Built 1994 Load: 32.4 t ADT: 8,684
Moise Mallet Rd.
GoodOver: BAYOU MALLET
0.5 Mi NE of LA 686, St. Martin, LA
Built 1992 Load: 32.4 t ADT: 70
LA0083
GoodOver: CREEK
2.9 Mi. East of LA 318, St. Mary, LA
Built 1954 Load: 32.4 t ADT: 1,382
LA0083
GoodOver: LITTLE BAYOU BLACK
0.6 MI NORTH OF LA 319, St. Mary, LA
Built 1960 Load: 32.4 t ADT: 3,078
US0090
GoodOver: CREEK
1.2 MI EAST OF LA 182, St. Mary, LA
Built 1964 Load: 32.4 t ADT: 9,896
Grand Ave
GoodOver: CYPRESS BAYOU
1.65 MILES SOUTH OF US90, St. Tammany, LA
Built 2015 Load: 32.4 t ADT: 284
Browns Village Rd
GoodOver: BAYOU VINCENT
1.0 MILES WEST OF US 11, St. Tammany, LA
Built 2010 Load: 32.4 t ADT: 1,567
US0011
GoodOver: Schneider Canal
1.5 Mi. S. of LA 433, St. Tammany, LA
Built 2017 Load: 32.4 t ADT: 8,018
LA0435
GoodOver: DRAIN
4.87 MILES EAST OF LA 36, St. Tammany, LA
Built 2010 Load: 32.4 t ADT: 4,200
WEST 15TH STREET
GoodOver: RATTLESNAKE BRANCH
1.0 MILE W OF LA 21, St. Tammany, LA
Built 2017 Load: 32.4 t ADT: 122
LA0021
GoodOver: CREEK
5.6 M NE OF LA 36, St. Tammany, LA
Built 1933 Load: 32.4 t ADT: 7,775
LA0021
GoodOver: ABITA CREEK
3.7 M SW OF LA 41, St. Tammany, LA
Built 1933 Load: 32.4 t ADT: 7,775
LA0041
GoodOver: BRUSHY BRANCH
3.5 M N OF LA 435, St. Tammany, LA
Built 1972 Load: 32.4 t ADT: 4,243
LA0041
GoodOver: DRAIN
4.0 M N OF LA 435, St. Tammany, LA
Built 1972 Load: 32.4 t ADT: 4,243
LA0040
GoodOver: BIG FORK BRANCH
2.0 MI N.E. LA 1129 INTER, St. Tammany, LA
Built 1997 Load: 32.4 t ADT: 1,567
LA0040
GoodOver: DRAIN
4.5 MI N-E JCT LA 1129, St. Tammany, LA
Built 1997 Load: 32.4 t ADT: 1,567
LA0040
GoodOver: DRAIN
5.1 MI N-E JCT LA 1129, St. Tammany, LA
Built 1997 Load: 32.4 t ADT: 1,567
I0012
GoodOver: FOX BRANCH
I0012, St. Tammany, LA
Built 1974 Load: 32.4 t ADT: 53,386
I0012
GoodOver: BIG BRANCH
I0012, St. Tammany, LA
Built 1972 Load: 32.4 t ADT: 78,974
US0190
GoodOver: DRAINAGE
0.9 M W OF I-10, St. Tammany, LA
Built 1970 Load: 32.4 t ADT: 20,256
Roseland Ave
GoodOver: CREEK
2.0 MILES SOUTHWEST OF JC, Tangipahoa, LA
Built 2011 Load: 32.4 t ADT: 350
LA1062
GoodOver: DRAIN
2 MILES WEST OF LA 445, Tangipahoa, LA
Built 2010 Load: 32.4 t ADT: 3,571
US0051
GoodOver: DRAIN
0.1 M N OF LA 1048, Tangipahoa, LA
Built 1957 Load: 32.4 t ADT: 2,199
US0051
GoodOver: DRAIN
1.42 MI. N OF LA 1048, Tangipahoa, LA
Built 1957 Load: 32.4 t ADT: 2,199
US0051
GoodOver: AARON BRANCH
0.4 M S OF LA 10, Tangipahoa, LA
Built 1957 Load: 32.4 t ADT: 2,199
US0051
GoodOver: DRAIN
0.8 M N OF LA 10, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,199
US0051
GoodOver: KLINE BRANCH
1.5 M N OF LA 10, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,199
US0051
GoodOver: CREEK
0.6 M N OF LA 440, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,199
US0051
GoodOver: DRAIN
0.6 M N OF LA 440, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,266
US0051
GoodOver: BUTTON CREEK
1.6 M S OF LA 38, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,266
US0051
GoodOver: DRAIN
0.8 M N OF LA 38, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,403
US0051
GoodOver: DRAIN
1.5 M N OF LA 38, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,403
US0051
GoodOver: CREEK
0.7 M N OF LA 1054, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 1,850
LA0016
GoodOver: CONNERS CREEK
0.7 M W OF LA 1054, Tangipahoa, LA
Built 1972 Load: 32.4 t ADT: 7,535
LA0016
GoodOver: CREEK
3.2 M W OF LA 445, Tangipahoa, LA
Built 1972 Load: 32.4 t ADT: 4,454
LA0038
GoodOver: CREEK
0.3 M W OF LA 1050, Tangipahoa, LA
Built 1952 Load: 32.4 t ADT: 1,535
LA0010
GoodOver: CREEK
.03 MILES WEST OF LA 1054, Tangipahoa, LA
Built 2006 Load: 32.4 t ADT: 3,768
LA0040
GoodOver: CREEK
2.78 MI EAST OF PARISH LN, Tangipahoa, LA
Built 1964 Load: 32.4 t ADT: 8,581
LA0040
GoodOver: PONCHATOULA CREEK
0.73 MI. W OF US 51, Tangipahoa, LA
Built 1976 Load: 32.4 t ADT: 8,581
I0055
GoodOver: DRAIN
1.8 Mi N. of US 51 BUS, Tangipahoa, LA
Built 1960 Load: 32.4 t ADT: 39,850
I0055
GoodOver: CREEK
1.5 M S OF LA 16, Tangipahoa, LA
Built 1970 Load: 32.4 t ADT: 23,562
I0055
GoodOver: CREEK
0.2 M N OF LA 16, Tangipahoa, LA
Built 1967 Load: 32.4 t ADT: 21,762
I0055
GoodOver: CLINE BRANCH
1.3 M N OF LA 10, Tangipahoa, LA
Built 1967 Load: 32.4 t ADT: 21,762
I0055
GoodOver: CREEK
0.3 M S OF LA 440, Tangipahoa, LA
Built 1966 Load: 32.4 t ADT: 21,762
Showing 8,451-8,500 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 |