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
LA3154
FairOver: ICG & KCS RR
2.58 MI NORTH OF LA 48, Jefferson, LA
Built 1976 Load: 33.6 t ADT: 29,942
W. Broussard Rd.
FairOver: COULEE
0.06 Mi S of LA 342, Lafayette, LA
Built 2007 Load: 33.6 t ADT: 2,059
US0090
FairOver: BAYOU FOLSE & CANAL
2.2 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 33.6 t ADT: 14,769
US0090
FairOver: BAYOU FOLSE & CANAL
2.2 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 33.6 t ADT: 13,535
LA3220
FairOver: BAYOU LAFOURCHE
.01 MI EAST OF LA 1, Lafourche, LA
Built 1986 Load: 33.6 t ADT: 3,859
LA0449
FairOver: CREEK
2.0 M N OF LA 63, Livingston, LA
Built 1952 Load: 33.6 t ADT: 1,467
US0080
FairOver: JOES BAYOU
.01 MI WEST OF LA 577, Madison, LA
Built 1954 Load: 33.6 t ADT: 894
I0020
FairOver: TENSAS-RIVER
7.3 MI EAST OF LA 577, Madison, LA
Built 1975 Load: 33.6 t ADT: 31,481
US0165
FairOver: TISDALE CANAL
6.35 MI NORTH OF LA 554, Morehouse, LA
Built 1978 Load: 33.6 t ADT: 12,405
US0425
FairOver: LAFOURCHE LAKE
3.7 MI SOUTH OF LA 133, Morehouse, LA
Built 1971 Load: 33.6 t ADT: 1,954
LA0491
FairOver: CANE RIVER
0.15 MI. EAST OF LA 1, Natchitoches, LA
Built 1970 Load: 33.6 t ADT: 237
LA0119
FairOver: CANE RIVER
0.01 Mi. E. OF LA 494, Natchitoches, LA
Built 1980 Load: 33.6 t ADT: 2,886
I0610
FairOver: ON RAMP I-610E.
.5 MI EAST OF I-10, Orleans, LA
Built 1963 Load: 33.6 t ADT: 7,620
I0510
FairOver: CITY STREETS
0.95M NORTH OF US 90, Orleans, LA
Built 1992 Load: 33.6 t ADT: 29,280
I0010
FairOver: ON RAMP (I-10E FR AIR)
1.94 MI EAST OF I-610, Orleans, LA
Built 1961 Load: 33.6 t ADT: 3,803
I0010
FairOver: ON RAMP I-10/CARRLOTON
1.96 MI EAST OF I-610, Orleans, LA
Built 1961 Load: 33.6 t ADT: 7,620
I0010
FairOver: CITY STREETS
02364509004083, Orleans, LA
Built 1960 Load: 33.6 t ADT: 47,738
US0071
FairOver: BOEUF BAYOU
0.08 MI. NORTH OF JCT 117, Rapides, LA
Built 1931 Load: 33.6 t ADT: 3,281
LA0174
FairOver: BAYOU PIERRE
2.31 MI WEST OF LA 1, Red River, LA
Built 1980 Load: 33.6 t ADT: 890
LA0191
FairOver: BRUSHY CREEK
.3 MI NORTH OF LA 474, Sabine, LA
Built 1976 Load: 33.6 t ADT: 2,968
I0010
FairOver: E. ATCHAFALAYA FLDY
13.6 MI EAST OF LA 347, St. Martin, LA
Built 1972 Load: 33.6 t ADT: 42,449
US0090
FairOver: CHOUPIQUE BAYOU
4.4 Mi SE of LA 318, St. Mary, LA
Built 1978 Load: 33.6 t ADT: 16,253
US0090/Ramp E
FairOver: 3rd St
0.15 Mi W of LA 182, St. Mary, LA
Built 1977 Load: 33.6 t ADT: 12,192
I0059
FairOver: DRY BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 33.6 t ADT: 33,925
I0059
FairOver: INDIAN BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 33.6 t ADT: 33,925
I0059
FairOver: CLEAR BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 33.6 t ADT: 33,925
I0012
FairOver: EAST BEDICO CREEK
I0012, St. Tammany, LA
Built 1975 Load: 33.6 t ADT: 28,450
LA0002
FairOver: DORCHEAT BAYOU
1.4 MI EAST OF LA 802, Webster, LA
Built 1984 Load: 33.6 t ADT: 1,540
GUIDRY RD
FairOver: NEZPIQUE BAYOU
1.1 MI N of LA1159, Allen, LA
Built 1986 Load: 33.7 t ADT: 36
FDR 900
FairOver: TRIB. CORNEY CREEK
3.93 MI. W. OF LA. 9, Claiborne, LA
Built 1974 Load: 33.7 t ADT: 120
BoDark Rd
FairOver: Cocodrie BAYOU
0.03 LOG MI E Of HWY 906, Concordia, LA
Built 1986 Load: 33.7 t ADT: 130
LA3149
FairOver: DRAIN
.01 MI NORTH OF LA 104, Evangeline, LA
Built 1932 Load: 33.7 t ADT: 1,756
Dyson Creek Rd
FairOver: BIG CREEK
7.68 M. W. OF JCT. US 165, Grant, LA
Built 1995 Load: 33.7 t ADT: 176
BISSONET DR
FairOver: CANAL #3
0.0 MI. N.OF VETERAN, Jefferson, LA
Built 1966 Load: 33.7 t
LA0725
FairOver: COULEE, MINE
0.64 MI WEST OF LA 723, Lafayette, LA
Built 2002 Load: 33.7 t ADT: 537
I0020
FairOver: I-20 SERVICE RD.
.5 MI EAST OF LA 544, Lincoln, LA
Built 1996 Load: 33.7 t ADT: 50,895
I0020
FairOver: I-20 SERVICE RD.
.5 MI EAST OF LA 544, Lincoln, LA
Built 1996 Load: 33.7 t ADT: 37,514
Grappes Bluff Rd
FairOver: SIMS BAYOU
GRAPPES BLUFF ROAD, Natchitoches, LA
Built 1994 Load: 33.7 t ADT: 264
Goldonna Rd
FairOver: LICK BRANCH
5.83 MI. SOUTH OF LA 156, Natchitoches, LA
Built 1995 Load: 33.7 t ADT: 233
S Broad on ramp
FairOver: STREETS
1.5 MI S OF TULANE AVENUE, Orleans, LA
Built 1951 Load: 33.7 t ADT: 5,441
MARION SIMMS RD
FairOver: LONG'S CREEK
0.38 MI NW of LA 34, Ouachita, LA
Built 1997 Load: 33.7 t ADT: 261
Lakeshore Dr
FairOver: BAYOU BRIDGE MANDEVILLE
1.0 MILE WEST OF US 190, St. Tammany, LA
Built 1996 Load: 33.7 t ADT: 2,543
HARVEY CROSSING
FairOver: ANACOCO BAYOU RELIEF
3.45 MI. EAST OF LA 464, Vernon, LA
Built 1992 Load: 33.7 t ADT: 200
LAUREL HILL RD
FairOver: MILL CREEK
1.0 M NORTH OF LA 489, Vernon, LA
Built 1992 Load: 33.7 t ADT: 250
US0165
FairOver: BAYOU
2.2 MI. S. OF LA 26, Allen, LA
Built 2008 Load: 34.0 t ADT: 11,447
I0010
FairOver: BAYOU CONWAY
0.3M SE JCT I-10 & LA 44, Ascension, LA
Built 1969 Load: 34.0 t ADT: 49,274
I0010
FairOver: BAYOU CONWAY
0.3M SE JCT I-10 & LA 44, Ascension, LA
Built 1969 Load: 34.0 t ADT: 21,372
LA0001
FairOver: BAYOU DES GLAISE
2.88 MILES NORTH OF LA 11, Avoyelles, LA
Built 1965 Load: 34.0 t ADT: 4,686
LA0110
FairOver: WILDCOW CREEK
9.5 MI. E OF LA 27, Beauregard, LA
Built 2003 Load: 34.0 t ADT: 2,060
GRAY RD
FairOver: VINTON CANAL
2.2 MI W OF LA 108, Calcasieu, LA
Built 1991 Load: 34.0 t ADT: 706
Showing 4,551-4,600 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 |