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
US0080
GoodOver: FLAT RIVER
1.8 MI EAST OF LA 782-2, Bossier, LA
Built 2003 Load: 40.8 t ADT: 2,376
I0220
GoodOver: US 79 80
0.3 MI E OF US 79, Bossier, LA
Built 1979 Load: 40.8 t ADT: 23,106
I0220
GoodOver: US 79 & 80
0.9 MI N OF I-20, Bossier, LA
Built 1979 Load: 40.8 t ADT: 24,701
US0071
GoodOver: LA 1
0.1 MI W JCT LA 1 & US 71, Caddo, LA
Built 1985 Load: 40.8 t ADT: 16,911
US0071
GoodOver: FLAG BRANCH
6.6 MI NORTH OF LA 2, Caddo, LA
Built 1981 Load: 40.8 t ADT: 349
LA0001
GoodOver: MILL CREEK
4.0 MI NORTH OF LA 170, Caddo, LA
Built 1986 Load: 40.8 t ADT: 2,836
LA0001
GoodOver: STATE LINE CREEK
1.7 MI NORTH OF LA 168, Caddo, LA
Built 1986 Load: 40.8 t ADT: 650
US0084
GoodOver: MUNDY BAYOU
0.17 MI WEST OF I-49, De Soto, LA
Built 1986 Load: 40.8 t ADT: 4,563
US0084
GoodOver: MUNDY BAYOU
0.17 MI WEST OF I-49, De Soto, LA
Built 1985 Load: 40.8 t ADT: 5,350
I0049
GoodOver: DOLET BAYOU
1.24 M S OF LA 177 INTR, De Soto, LA
Built 1988 Load: 40.8 t ADT: 28,142
SMITHPORT LAKE RD
GoodOver: I-49
2.81 MI N OF US 84 INTER, De Soto, LA
Built 1985 Load: 40.8 t ADT: 1,680
LA0793
GoodOver: MUD BRANCH
2.3 MI WEST OF LA 794, Webster, LA
Built 1986 Load: 40.8 t ADT: 125
US0065
GoodOver: OTTER BAYOU
6.9 MI NORTH OF LA 580, East Carroll, LA
Built 1985 Load: 40.8 t ADT: 3,046
LA0134
GoodOver: TENSAS BAYOU
3.0 MI NORTH OF LA 882, East Carroll, LA
Built 1985 Load: 40.8 t ADT: 437
LA0582
GoodOver: BAXTER BAYOU
5.67 MI WEST OF LA 134, East Carroll, LA
Built 1983 Load: 40.8 t ADT: 593
LA0582
GoodOver: CANEY BAYOU
2.01 MI WEST OF LA 134, East Carroll, LA
Built 1983 Load: 40.8 t ADT: 593
LA0582
GoodOver: MID-SLOUGH BAYOU
.87 MI WEST OF LA 134, East Carroll, LA
Built 1983 Load: 40.8 t ADT: 593
LA0582
GoodOver: TENSAS BAYOU
.58 MI WEST OF LA 134, East Carroll, LA
Built 1983 Load: 40.8 t ADT: 593
I0020
GoodOver: M. P. RR
.4 MI WEST OF US 65, Madison, LA
Built 1975 Load: 40.8 t ADT: 31,481
LA0134
GoodOver: COULEE DITCH
1.2 MI EAST OF LA 139, Morehouse, LA
Built 1981 Load: 40.8 t ADT: 1,183
LA0015
GoodOver: TEN MILE CREEK
3.0 MI WEST OF LA 558, Union, LA
Built 1981 Load: 40.8 t ADT: 651
LA0582
GoodOver: LYON BAYOU
0.4 MI E of LA 17, West Carroll, LA
Built 1983 Load: 40.8 t ADT: 384
LA0587
GoodOver: BAYOU
.8 MI WEST OF LA 878, West Carroll, LA
Built 1985 Load: 40.8 t ADT: 565
LA0587
GoodOver: DRAIN
.3 MI EAST OF LA 878, West Carroll, LA
Built 1985 Load: 40.8 t ADT: 565
LA0587
GoodOver: DRAIN
.9 MI EAST OF LA 878, West Carroll, LA
Built 1985 Load: 40.8 t ADT: 565
GREEN OAK RD
GoodOver: STREAM
1.3 MI. NORTH OF US 165, Allen, LA
Built 2013 Load: 40.8 t ADT: 900
GREEN OAK RD
GoodOver: CREEK
0.6 MI N of US 165, Allen, LA
Built 2011 Load: 40.8 t ADT: 859
LA0010
GoodOver: CALCASIEU RIVER
0.8 MI. E OF INT LA3205, Allen, LA
Built 1982 Load: 40.8 t ADT: 4,806
OLD RIVER RD
GoodOver: CANEY CREEK
1.9 MI S OF LA 389, Beauregard, LA
Built 2014 Load: 40.8 t ADT: 70
LA0001
GoodOver: CHOCTAW BAYOU
0.74 MI. SOUTH OF LA 1194, Avoyelles, LA
Built 1982 Load: 40.8 t ADT: 6,559
LA0029
GoodOver: BAYOU ROUGE
0.01 MILE EAST OF LA 1178, Avoyelles, LA
Built 1987 Load: 40.8 t ADT: 3,490
LA0492
GoodOver: BAYOU RIGOLETTE
0.96 MI. WEST OF US 71, Grant, LA
Built 1999 Load: 40.8 t ADT: 570
LA0492
GoodOver: BAYOU DARROW
2.12 MI. WEST OF US 71, Grant, LA
Built 1999 Load: 40.8 t ADT: 570
LA0500
GoodOver: LITTLE BEAR & RATTON CR.
5.34 MI. EAST OF US 167, Grant, LA
Built 1998 Load: 40.8 t ADT: 620
LA0500
GoodOver: LOCK BRANCH
2.9 MI EAST OF LA 472, Grant, LA
Built 1998 Load: 40.8 t ADT: 620
LA0122
GoodOver: NANTACHIE CREEK
1.44 MI. EAST OF US 71, Grant, LA
Built 1982 Load: 40.8 t ADT: 683
LA0122
GoodOver: NANTACHIE CREEK RELIEF
1.55 MI. EAST OF US 71, Grant, LA
Built 1982 Load: 40.8 t ADT: 683
LA0122
GoodOver: DARTIGO CREEK
8.52 MI. EAST OF US 71, Grant, LA
Built 1993 Load: 40.8 t ADT: 683
LA0490
GoodOver: BAYOU MAURICE
3.44 MI. SW OF LA 1, Natchitoches, LA
Built 1993 Load: 40.8 t ADT: 142
LA0490
GoodOver: BAYOU MAYO
3.67 MI. SW OF LA 1, Natchitoches, LA
Built 1993 Load: 40.8 t ADT: 142
LA0117
GoodOver: LITTLE SANDY CREEK
4.9 MI N OF JCT LA 465, Natchitoches, LA
Built 1991 Load: 40.8 t ADT: 1,513
I0049
GoodOver: YOUNGS BAYOU
1.1 MI. NORTH OF LA 6, Natchitoches, LA
Built 1986 Load: 40.8 t ADT: 18,305
I0049
GoodOver: YOUNGS BAYOU
1.1 MI. NORTH OF LA 6, Natchitoches, LA
Built 1986 Load: 40.8 t ADT: 28,142
I0049
GoodOver: LOST BAYOU
1.48 MI. NORTH OF LA 6, Natchitoches, LA
Built 1987 Load: 40.8 t ADT: 18,305
I0049
GoodOver: LOST BAYOU
1.48 MI. NORTH OF LA 6, Natchitoches, LA
Built 1987 Load: 40.8 t ADT: 28,142
I0049
GoodOver: GUMROOT BAYOU
1.66 MI. NORTH OF LA 6, Natchitoches, LA
Built 1986 Load: 40.8 t ADT: 18,305
I0049
GoodOver: GUMROOT BAYOU
1.66 MI. NORTH OF LA 6, Natchitoches, LA
Built 1986 Load: 40.8 t ADT: 28,142
I0049
GoodOver: CREEK
3.6 MI NORTH OF LA 485, Natchitoches, LA
Built 1987 Load: 40.8 t ADT: 16,334
I0049
GoodOver: HALLS BREAK CREEK
2.03 MI. SOUTH OF LA 174, Natchitoches, LA
Built 1987 Load: 40.8 t ADT: 16,334
I0049
GoodOver: HALLS BREAK CREEK
2.03 MI. SOUTH OF LA 174, Natchitoches, LA
Built 1987 Load: 40.8 t ADT: 28,142
Showing 9,901-9,950 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.