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
LA0008
FairOver: SUGARHOUSE BAYOU
1.4 MI. EAST OF LA 158, Grant, LA
Built 1972 Load: 43.5 t ADT: 2,113
LA0006
FairOver: STOKER BRANCH
.70 MI. E OF JCT LA 120, Natchitoches, LA
Built 1967 Load: 43.5 t ADT: 6,226
LA0006
FairOver: YOUNG BAYOU
1.45 MI. EAST OF LA 117, Natchitoches, LA
Built 1964 Load: 43.5 t ADT: 8,675
LA0001
FairOver: OLD RIVER
2.21 MI W OF JCT LA 1, Natchitoches, LA
Built 1972 Load: 43.5 t ADT: 4,740
LA0001
FairOver: YOUNGS BAYOU
3.16 MI W OF JCT LA 1, Natchitoches, LA
Built 1972 Load: 43.5 t ADT: 4,740
I0049
FairOver: JOHNSON CHUTE BAYOU
6.29 MI. N OF LA6, Natchitoches, LA
Built 1985 Load: 43.5 t ADT: 18,305
I0049
FairOver: JONHSON CHUTE BAYOU
6.29 MI. N OF LA6, Natchitoches, LA
Built 1985 Load: 43.5 t ADT: 28,142
LA1222
FairOver: MALLARD BAYOU
2.13 MI. E OF INT LA485, Natchitoches, LA
Built 1994 Load: 43.5 t ADT: 94
US0167
FairOver: BAYOU COCODRIE
1.2 MI. SOUTH OF I-49, Rapides, LA
Built 1966 Load: 43.5 t ADT: 2,324
I0049
FairOver: HORSESHOE CANAL
1.38 MI. NORTH OF LA 3250, Rapides, LA
Built 1995 Load: 43.5 t ADT: 45,104
I0049
FairOver: HORSESHOE CANAL
1.38 MI. NORTH OF LA 3250, Rapides, LA
Built 1995 Load: 43.5 t ADT: 20,561
LA0006
FairOver: BLACKWELL CREEK
0.84 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
LA0006
FairOver: PHILLIPS CREEK
1.58 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
LA0006
FairOver: PHILLIPS CREEK
1.75 MI. EAST OF LA 1217, Sabine, LA
Built 1966 Load: 43.5 t ADT: 7,429
US0171
FairOver: CASTOR CREEK RELIEF
5.1 MI NORTH OF LA 10, Vernon, LA
Built 1975 Load: 43.5 t ADT: 12,466
US0171
FairOver: CASTOR CREEK RELIEF
5.1 MI NORTH OF LA 10, Vernon, LA
Built 1975 Load: 43.5 t ADT: 6,952
US0171
FairOver: SALES BRANCH
.25 MI NORTH OF LA 1211, Vernon, LA
Built 1975 Load: 43.5 t ADT: 14,458
LA0111
FairOver: ANACOCO CREEK RELIEF
2.92 MI. EAST OF LA 392, Vernon, LA
Built 1966 Load: 43.5 t ADT: 937
LA0111
FairOver: ANACOCO CREEK
3.09 MI EAST OF LA 392, Vernon, LA
Built 1966 Load: 43.5 t ADT: 937
LA0008
FairOver: RHINEHART CREEK
2.3 MI EAST OF US 84, Catahoula, LA
Built 1977 Load: 43.5 t ADT: 1,606
LA0017
FairOver: DEER CREEK
5.88 MI NORTH OF LA 4, Franklin, LA
Built 1972 Load: 43.5 t ADT: 4,194
US0084
FairOver: DOYLE CREEK
.3 MI EAST OF LA 8, LaSalle, LA
Built 1967 Load: 43.5 t ADT: 2,479
LA0070
FairOver: PANAMA CANAL
LA3089, Ascension, LA
Built 1966 Load: 43.5 t ADT: 24,210
LA0070
FairOver: BAYOU NAPOLEON
0.8 M SW of LA 3127, Assumption, LA
Built 1972 Load: 43.5 t ADT: 11,166
LA0398
FairOver: BAYOU MORGAN CITY
LA0398, Assumption, LA
Built 1969 Load: 43.5 t ADT: 2,115
LA0398
FairOver: BAYOU L OURSE
LA0398, Assumption, LA
Built 1969 Load: 43.5 t ADT: 2,115
LA0067
FairOver: WHITE CREEK
LA 67, East Baton Rouge, LA
Built 1988 Load: 43.5 t ADT: 13,964
LA1248
FairOver: WARD CRK/BLUEBONNET BLVD
3.17 MI N OF BURBANK DR., East Baton Rouge, LA
Built 1978 Load: 43.5 t ADT: 24,300
LA3131
FairOver: PORTAGE CANAL
5.3 Mi N. of LA 78, Pointe Coupee, LA
Built 1970 Load: 43.5 t ADT: 10,317
LA0076
FairOver: STUMPY BAYOU
0.2 M E of LA 413, West Baton Rouge, LA
Built 1971 Load: 43.5 t ADT: 7,562
LA0010
FairOver: JOSEPH BRANCH
0.68 M EAST OF LA 43, St. Helena, LA
Built 1991 Load: 43.5 t ADT: 5,211
LA0016
FairOver: EAST HOG BRANCH
3.7M EAST OF LA 449, St. Helena, LA
Built 1991 Load: 43.5 t ADT: 3,959
US0190
FairOver: BOGUE FALAYA
0.2 MI WEST OF LA 21 INT., St. Tammany, LA
Built 1993 Load: 43.5 t ADT: 9,408
I0010
FairOver: CANAL
2.0 M SW OF LA 433, St. Tammany, LA
Built 1965 Load: 43.5 t ADT: 42,154
I0010
FairOver: CANAL
2.0 M SW OF LA 433, St. Tammany, LA
Built 1965 Load: 43.5 t ADT: 1,600
LA0010
FairOver: CREEK
0.5 M E OF US 51, Tangipahoa, LA
Built 1966 Load: 43.5 t ADT: 3,768
I0055
FairOver: I-55 OVER LA 38
I0055, Tangipahoa, LA
Built 1966 Load: 43.5 t ADT: 21,762
I0055
FairOver: I-55 OVER LA 38
I0055, Tangipahoa, LA
Built 1966 Load: 43.5 t ADT: 17,665
LA0021
FairOver: PETERS CREEK
LA0021, Washington, LA
Built 1965 Load: 43.5 t ADT: 6,741
LA0021
FairOver: NORTH BRANCH
LA0021, Washington, LA
Built 1965 Load: 43.5 t ADT: 6,741
LA0021
FairOver: DRAIN
0.2 M N OF LA 436, Washington, LA
Built 1965 Load: 43.5 t ADT: 5,485
LA0660
FairOver: DRAIN CANAL
1.0 MI. WEST OF LA 3087, Terrebonne, LA
Built 2010 Load: 43.7 t ADT: 10,321
OLD SPANISH TRAIL
FairOver: FARMERS L&C CO. CANAL
0.3 MI E of LA 27, Calcasieu, LA
Built 2010 Load: 43.7 t ADT: 7,583
LA0012
FairOver: CURRENT SLOUGH
4.1 MI W OF LA 109, Calcasieu, LA
Built 2022 Load: 44.1 t ADT: 4,600
WEST DIVISION ST
FairOver: PETITE MARAIS
1.24 MI W OF LA 26, Jefferson Davis, LA
Built 2019 Load: 44.1 t ADT: 1,200
LA0450
FairOver: CATCA CREEK
5.5 MILES NO OF LA 25, Washington, LA
Built 1998 Load: 44.1 t ADT: 1,822
MAGAZINE ACCESS RD
FairOver: CANAL
10 M S OF MAGAZINE RD, Plaquemines, LA
Built 1989 Load: 44.4 t ADT: 30
W Esplanade Ave S
FairOver: CANAL #17
0.1 MI.W. OF TULANE DRIVE, Jefferson, LA
Built 1984 Load: 44.4 t
MIRABEAU AVE
FairOver: LONDON AVE. CANAL
0.04 MI E OF PRATT DR, Orleans, LA
Built 2003 Load: 44.4 t
Muskrat Rd.
FairOver: Lyons Point Gully
0.3 Mi. S. of La 92, Acadia, LA
Built 1994 Load: 44.4 t ADT: 672
Showing 5,701-5,750 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.