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
6TH ST
FairOver: FARMERS L & C CO. CANAL
0.2 MI E of LA 385, Calcasieu, LA
Built 1960 Load: 30.8 t ADT: 431
LA0133
FairOver: BAYOU LAFOURCHE CUT OFF
3.85 MI NORTH OF LA 4, Caldwell, LA
Built 1951 Load: 30.8 t ADT: 1,415
LA0008
FairOver: BAYOU LOUIS
2.34 M E of LA 922, Catahoula, LA
Built 1989 Load: 30.8 t ADT: 1,394
LA0126
FairOver: HAWTHORNE CREEK
0.69 M N of LA 8, Catahoula, LA
Built 1983 Load: 30.8 t ADT: 544
Apple Street
FairOver: VIDALIA CANAL
0.04 MI N of Peach Street, Concordia, LA
Built 1970 Load: 30.8 t ADT: 200
LA3248
FairOver: CREEK
1.61 MILES SOUTH OF THE E, De Soto, LA
Built 2012 Load: 30.8 t ADT: 42
I0110
FairOver: NORTH ST.
I-110 / MAIN ST. INTG., East Baton Rouge, LA
Built 1963 Load: 30.8 t ADT: 8,250
Stanford Ave
FairOver: CORPORATION CANAL
1.2 M S OF LA 427, East Baton Rouge, LA
Built 1950 Load: 30.8 t ADT: 23,240
Highland Rd
FairOver: CORPORATION CANAL
49' N OF E MCKINLEY ST, East Baton Rouge, LA
Built 1960 Load: 30.8 t ADT: 12,996
Capital Heights Av
FairOver: WARD CREEK
0.7 MI W of LA 73, East Baton Rouge, LA
Built 1960 Load: 30.8 t ADT: 400
US0165
FairOver: INDIAN CREEK
4.6 MI NORTH OF LA 123, Grant, LA
Built 1939 Load: 30.8 t ADT: 1,898
US0165
FairOver: INDIAN CREEK RELIEF
5.0 MI NORTH OF LA 123, Grant, LA
Built 1939 Load: 30.8 t ADT: 1,898
US0165
FairOver: BEAR CREEK
5.6 MI NORTH OF LA 123, Grant, LA
Built 1939 Load: 30.8 t ADT: 1,898
LA1255
FairOver: CRIP RAILROAD
4.8 MI NORTH OF LA 505, Jackson, LA
Built 1977 Load: 30.8 t ADT: 12,847
US0090-B
FairOver: ON RAMP TO US 90 BUS EB
0.06 MI EAST OF AMES BLVD, Jefferson, LA
Built 1992 Load: 30.8 t ADT: 15,955
Vintage Dr
FairOver: CANAL NO. 17
2.2 MI WEST OF LA 49, Jefferson, LA
Built 1990 Load: 30.8 t
VINTAGE W.B.
FairOver: CANAL NO. 17
2.2 MI WEST OF LA 49, Jefferson, LA
Built 1990 Load: 30.8 t
S. College Ext.
FairOver: DES POCHES DRAINAGE CANA
0.37 Mi N of LA 3095, Lafayette, LA
Built 1985 Load: 30.8 t ADT: 1,280
Shadow Bluff Dr
FairOver: Francois Coulee
.25 MI NE of LA Ave, Lafayette, LA
Built 1979 Load: 30.8 t ADT: 370
I0020
FairOver: DRAINAGE
2.8 MI WEST OF LA 577, Madison, LA
Built 1971 Load: 30.8 t ADT: 31,481
I0020
FairOver: DRAINAGE
2.8 MI WEST OF LA 577, Madison, LA
Built 1971 Load: 30.8 t ADT: 31,481
LA1226
FairOver: CLEAR LAKE
2.67 MI. N OF INT US84, Natchitoches, LA
Built 1995 Load: 30.8 t ADT: 495
US0090
FairOver: CITY STREETS
.78 MI SOUTH OF I-10, Orleans, LA
Built 1994 Load: 30.8 t ADT: 7,620
PALMETTO ST
FairOver: AIRLINE HWY.,KCS RR
.50 MI.W.OF CARROLTON AVE, Orleans, LA
Built 1960 Load: 30.8 t
PALMETTO ST
FairOver: AIRLINE HWY., KCS RR
.50 MI.W.OF CARROLTON AVE, Orleans, LA
Built 1960 Load: 30.8 t
CENTRAL ST
FairOver: BLACK BAYOU
WEST MONROE, Ouachita, LA
Built 1982 Load: 30.8 t ADT: 250
DESIARD ST
FairOver: YOUNGS BAYOU
DESIARD ST. MONROE L, Ouachita, LA
Built 1961 Load: 30.8 t ADT: 10,000
LA0454
FairOver: WIGGINS BAYOU
2.33 MI. SOUTH OF LA 107, Rapides, LA
Built 1947 Load: 30.8 t ADT: 226
LA0454
FairOver: WIGGINS BAYOU RELIEF
1.05 MI. SOUTH OF LA 107, Rapides, LA
Built 1947 Load: 30.8 t ADT: 226
North Bayou Rd
FairOver: BAYOU RAPIDES
0.04 M. N. OF E. JCT. LA, Rapides, LA
Built 1995 Load: 30.8 t ADT: 227
LA0191
FairOver: TURNER CREEK
2.5 MI NORTH OF LA 476, Sabine, LA
Built 1976 Load: 30.8 t ADT: 1,566
LA0449
FairOver: WEST HOG BRANCH
LA0449, St. Helena, LA
Built 1966 Load: 30.8 t ADT: 1,467
LA0449
FairOver: DRAIN
3.0 M S OF LA 16, St. Helena, LA
Built 1966 Load: 30.8 t ADT: 1,467
I0049
FairOver: E. PRUDHOMME STREET
0.7 MI N of US 190, St. Landry, LA
Built 1983 Load: 30.8 t ADT: 16,429
I0049
FairOver: E. PRUDHOMME STREET
3.13 Mi S of LA 744, St. Landry, LA
Built 1983 Load: 30.8 t ADT: 13,540
I0010
FairOver: W ATCHAFALAYA FLOODWAY
2.5 MI EAST OF LA 347, St. Martin, LA
Built 1971 Load: 30.8 t ADT: 37,370
I0010
FairOver: W ATCHAFALAYA FLOODWAY
4.47 Mi W of LA 3177, St. Martin, LA
Built 1971 Load: 30.8 t ADT: 1,585
I0059
FairOver: MIDDLE SLOUGH
I0059, St. Tammany, LA
Built 1962 Load: 30.8 t ADT: 36,841
I0059
FairOver: DRY BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 30.8 t ADT: 36,841
I0059
FairOver: INDIAN BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 30.8 t ADT: 36,841
I0059
FairOver: CLEAR BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 30.8 t ADT: 36,841
I0059
FairOver: RONES BAYOU
I0059, St. Tammany, LA
Built 1962 Load: 30.8 t ADT: 36,841
LA3087
FairOver: INTRACOASTAL WW
.1 MI EAST OF LA 659, Terrebonne, LA
Built 1980 Load: 30.8 t ADT: 13,617
MORGAN ST
FairOver: TERREBONNE BAYOU
0.01 MI S OF LA 24, Terrebonne, LA
Built 2003 Load: 30.8 t ADT: 3,837
LA0014
FairOver: MERMENTAU RIVER
1.2 MI N. OF LA 717, Vermilion, LA
Built 1976 Load: 30.8 t ADT: 1,717
I0010
FairOver: SMITH BAYOU
1.17 M West of LA 30, Ascension, LA
Built 1975 Load: 31.1 t ADT: 60,802
I0010
FairOver: SMITH BAYOU
I0010, Ascension, LA
Built 1975 Load: 31.1 t ADT: 25,735
WALLACE ST
FairOver: 71ST STREET DITCH
0.2 MI SO. OF LA 511, Caddo, LA
Built 1962 Load: 31.1 t ADT: 300
WEST LINCOLN ST
FairOver: CANAL
0.2 MI NORTH OF US 90, Calcasieu, LA
Built 2009 Load: 31.1 t ADT: 200
I0010
FairOver: HAMPTONS COULEE
1.3 MI EAST OF LA 3063, Calcasieu, LA
Built 1966 Load: 31.1 t ADT: 86,969
Showing 3,551-3,600 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 |