Total Bridges
12,698
Public highway bridges in Louisiana
State profile · Above median Poor share
Louisiana bridge safety
According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Louisiana.
- 12,698
- Public bridges
- 38.7%
- Good condition
- 11.5%
- Poor condition
Louisiana holds 12,698 public highway bridges (#24 of 52 by inventory) with a 11.48% Poor share (#8 of 52 by Poor share).
That is 11.5% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 45 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.
Inventory: FHWA NBI 2024 · last ETL August 2026
Good Condition
38.7%
4,919 bridges rated 7-9
-11.3pp vs 50% benchmark
Poor Condition
11.5%
1,458 bridges whose lowest applicable component is rated 0-4
4.0pp vs national avg 7.5%
Louisiana vs national bridge condition
Louisiana - Good condition share 38.7%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Louisiana - Poor-condition share 38.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.
Louisiana in the national condition pattern
Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.
Louisiana vs all states by public bridge inventory
Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges
12,698 24th of 54 higher than 30 of 54 states
States and territories, banded by public bridge inventory size
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · 2024
Read the rank neighborhood for Louisiana
The highlighted point is Louisiana: 12,698 bridges and 11.48% in Poor condition, rank #45 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Louisiana on that same Poor-share ordering:
- North Dakota: 4,255 bridges · 10.98% Poor
- Michigan: 11,371 bridges · 11.27% Poor
- Louisiana: 12,698 bridges · 11.48% Poor
- Pennsylvania: 23,299 bridges · 12.58% Poor
- Guam: 47 bridges · 12.77% Poor
The full national sortable table lives on the rankings page.
Material families in Louisiana
Exclusive FHWA material families across all 12,698 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.
Who maintains Louisiana’s inventory
State agency holds 61.0% of the 12,698 public highway bridges filed under Louisiana in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.
When Louisiana’s bridges were built
Pre-1950 construction accounts for 4.2% of the 12,698 bridges with a recorded original year in Louisiana. Era bands are orthogonal to the Poor-share ranking above.
Condition Distribution
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 322 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 by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Louisiana on the same metric.
ND
North Dakota
10.98% top marginal rate
MI
Michigan
11.27% top marginal rate
LA
Louisiana
11.48% top marginal rate
PA
Pennsylvania
12.58% top marginal rate
GU
Guam
12.77% top marginal rate
Bridges Needing Most Attention in Louisiana
Six lowest-condition bridges in Louisiana, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
Avenue E
PoorOver: DRESSER CANAL
0.10 MI WEST OF LA 1, Lafourche, LA
Built 1952 Load: 0.0 t
VALENTINE BRIDGE R
PoorOver: LAFOURCHE BAYOU
0.01 MI N OF LA 1, Lafourche, LA
Built 1969 Load: 0.0 t
UNNAMED RD
PoorOver: I-10
3.1 MI EAST OF I-510, Orleans, LA
Built 1969 Load: 0.0 t ADT: 28,550
UNNAMED RD
PoorOver: I-10
4.5 MI EAST OF I-510, Orleans, LA
Built 1969 Load: 0.0 t ADT: 28,550
Almonaster Ave
PoorOver: INNER HARBOR NAVIGATION
0.01 MI E OF FRANCE RD, Orleans, LA
Built 1919 Load: 0.0 t
Beiber Rd
PoorOver: NEZPIQUE BAYOU
3.65 Mi W of La 1160, Evangeline, LA
Built 1965 Load: 0.0 t ADT: 70
All Bridges in Louisiana
US0090
FairOver: LA662 BAYOU LOURSE
.05 MI EAST OF LA 662, Terrebonne, LA
Built 1998 Load: 32.7 t ADT: 4,014
LA3052
FairOver: LA 20 SP RR DRAIN CANA
RAMP TO LA 20, Terrebonne, LA
Built 1994 Load: 32.7 t ADT: 3,007
US0090
FairOver: DEADWOOD RD TIGER BAYOU
.04 MI EAST OF LA 3052, Terrebonne, LA
Built 1994 Load: 32.7 t ADT: 4,014
US0090
FairOver: DRAIN CANALS LA.20 RR
.5 MI EAST OF LA 311, Terrebonne, LA
Built 1995 Load: 32.7 t ADT: 4,014
US0090
FairOver: DRAINAGE CANALS LA.20 RR
.5 MI EAST OF LA 311, Terrebonne, LA
Built 1995 Load: 32.7 t ADT: 3,007
LA0097
FairOver: BAYOU NEZPIQUE
0.3 MI NORTH OF I-10, Acadia, LA
Built 1990 Load: 32.7 t ADT: 1,175
I0010
FairOver: BAYOU JONAS
8.3 MI EAST OF LA 97, Acadia, LA
Built 1961 Load: 32.7 t ADT: 48,502
I0010
FairOver: BAYOU JONAS
1.86 Mi W of LA 91, Acadia, LA
Built 1961 Load: 32.7 t ADT: 1,471
I0010
FairOver: LA0013
I-10 OVER LA 13, Acadia, LA
Built 1966 Load: 32.7 t ADT: 66,003
I0010
FairOver: LA0013
I-10 OVER LA 13, Acadia, LA
Built 1966 Load: 32.7 t ADT: 3,018
LA0091
FairOver: I0010
3.77 MI NORTH OF US 90, Acadia, LA
Built 1960 Load: 32.7 t ADT: 1,617
I0049
FairOver: LA 726
I-49 OVER LA 726, Lafayette, LA
Built 1981 Load: 32.7 t ADT: 11,728
E. Edith Rd.
FairOver: EDITH COULEE
0.50 Mi W of LA 733, Lafayette, LA
Built 1986 Load: 32.7 t ADT: 400
S. A RD.
FairOver: COULEE
0.6 miles South of US 90, Lafayette, LA
Built 1977 Load: 32.7 t ADT: 66
Anderson Rd
FairOver: QUEUE DE TORTUE BAYOU
0.15 Mi W of LA 724, Lafayette, LA
Built 1980 Load: 32.7 t ADT: 317
E. Butcher Switch
FairOver: DRAINAGE COULEE
2.20 Mi E of I-49, Lafayette, LA
Built 1984 Load: 32.7 t ADT: 224
I0049
FairOver: BAYOU BOURBEAU
3.2 MI S of LA 3233, St. Landry, LA
Built 1962 Load: 32.7 t ADT: 13,540
I0049
FairOver: REST AREA OVERPASS
6.38 MI N OF LA 745, St. Landry, LA
Built 1986 Load: 32.7 t ADT: 21,048
I0049
FairOver: REST AREA OVERPASS
5.64 Mi S of LA 29, St. Landry, LA
Built 1986 Load: 32.7 t ADT: 13,540
LA0359
FairOver: BAYOU SAQUETTE
0.3 MI NORTH OF LA 103, St. Landry, LA
Built 1966 Load: 32.7 t ADT: 744
LA0031
FairOver: LA 31 OVER I-10
1.17 MI N OF LA 94, St. Martin, LA
Built 1970 Load: 32.7 t ADT: 8,168
I0010
FairOver: E ATCHAFALAYA FLOODWAY
7.56 MI EAST OF LA 347, St. Martin, LA
Built 1972 Load: 32.7 t ADT: 42,449
I0010
FairOver: E ATCHAFALAYA FLOODWAY
0.8 Mi W. Of La 975, St. Martin, LA
Built 1972 Load: 32.7 t ADT: 1,585
LA0317
FairOver: ICWW @ BAYOU SALE
6.2 MI S OF US 90(LA0317), St. Mary, LA
Built 1982 Load: 32.7 t ADT: 2,700
US0090
FairOver: CHOUPIQUE BAYOU
0.2 Mi. NW of LA 83, St. Mary, LA
Built 1978 Load: 32.7 t ADT: 10,070
US0090/Ramp
FairOver: CHOUPIQUE BAYOU
0.6 Mi N of LA 83, St. Mary, LA
Built 1978 Load: 32.7 t ADT: 12,192
US0090
FairOver: LITTLE BAYOU BLACK
8.3 MI EAST OF LA 182, St. Mary, LA
Built 1964 Load: 32.7 t ADT: 7,885
US0090
FairOver: LITTLE BAYOUBLACK
2.0 MI W of LA 182/LA70, St. Mary, LA
Built 1964 Load: 32.7 t ADT: 10,035
LA0082
FairOver: INTRACOASTAL WATERWAY
14.2 MI N. OF LA 3147, Vermilion, LA
Built 1976 Load: 32.7 t ADT: 2,899
PINE GROVE Ch RD
FairOver: I-20
1.69 MI EAST OF US 80, Bienville, LA
Built 1964 Load: 32.7 t ADT: 3,250
BODCAU STATION RD
FairOver: I-20
4.4 MI EAST OF LA 782-2, Bossier, LA
Built 1973 Load: 32.7 t ADT: 5,520
I0220
FairOver: SWAN LAKE ROAD
1.9 MI EAST OF LA 3105, Bossier, LA
Built 1978 Load: 32.7 t ADT: 35,972
US0071
FairOver: US 71 OVER I-49
7.20 MILES N. OF THE JCT, Caddo, LA
Built 2010 Load: 32.7 t ADT: 626
US0171
FairOver: CYPRESS BAYOU RELIEF NO
1.4 MI. N. OF LA 3276, Caddo, LA
Built 1981 Load: 32.7 t ADT: 10,623
US0171
FairOver: CYPRESS BAYOU RELIEF NO
1.7 MI. N. OF LA 3276, Caddo, LA
Built 1981 Load: 32.7 t ADT: 10,623
LA0001
FairOver: JONES ST/KCS RR
2.6 MI NORTH OF LA 3032, Caddo, LA
Built 1983 Load: 32.7 t ADT: 16,911
I0020
FairOver: HUDSON ST
3.47 MI EAST OF I-220, Caddo, LA
Built 1965 Load: 32.7 t ADT: 98,318
I0020
FairOver: HUDSON ST
3.47 MI EAST OF I-220, Caddo, LA
Built 1965 Load: 32.7 t ADT: 98,318
I0020
FairOver: I-20 RAMP W-S MKT ST.
1.25 MI EAST OF US 80, Caddo, LA
Built 1985 Load: 32.7 t ADT: 87,567
I0020
FairOver: LA AVE &HOWELL ST
2.3 MI WEST OF LA 71, Caddo, LA
Built 1965 Load: 32.7 t ADT: 87,567
I0020
FairOver: MARSHALL ST/LA 1/RRS.
I-20 OVER LA 1, Caddo, LA
Built 1965 Load: 32.7 t ADT: 98,318
I0020
FairOver: SPRING ST/MARKET/LA 1
I-20 RAMP TO LA 1, Caddo, LA
Built 1965 Load: 32.7 t ADT: 87,567
I0049
FairOver: CYPRESS BAYOU
4.0 MI S OF LA 526 INTR, Caddo, LA
Built 1989 Load: 32.7 t ADT: 28,142
I0049
FairOver: CYPRESS SLOUGH
3.6 M S OF LA 526 INTR, Caddo, LA
Built 1989 Load: 32.7 t ADT: 29,022
I0049
FairOver: LA 526 INT
1.35M SOUTH OF LA3132 INT, Caddo, LA
Built 1991 Load: 32.7 t ADT: 60,171
I0049
FairOver: CITY STS/KCS RR
1.9 MI NORTH OF LA 526, Caddo, LA
Built 1991 Load: 32.7 t ADT: 87,568
I0049
FairOver: CITY STS/KCS RR
0.5 MI NORTH OF LA 3132, Caddo, LA
Built 1991 Load: 32.7 t ADT: 28,142
Robson Rd
FairOver: BAYOU PEIRRE
0.6 MI SOUTH OF LA 1, Caddo, LA
Built 1989 Load: 32.7 t ADT: 300
US0084
FairOver: WILLIAMS CREEK
.1 MI EAST OF LA 481, De Soto, LA
Built 1949 Load: 32.7 t ADT: 6,672
US0171
FairOver: WALLACE CREEK
5.2 MI. N. OR US 84, De Soto, LA
Built 1976 Load: 32.7 t ADT: 6,150
Showing 3,651-3,700 of 12,698 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
What to do with this
Use Louisiana's inventory picture to drill to a county or a specific span.
- Browse counties in Louisiana and open the highest-Poor shares first. County list
- See where this state sits among peers on Poor-condition share. State rankings
- Compare this state with another jurisdiction on the same measures. State compare
NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Louisiana Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.