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
LA0044
FairOver: CONWAY BAYOU
LA 44 @ I-10, Ascension, LA
Built 1978 Load: 41.7 t ADT: 13,542
I0010
FairOver: I-110S RAMP TO I-10W
0.6 M S of US 90X, East Baton Rouge, LA
Built 1967 Load: 41.7 t ADT: 32,092
I0012
FairOver: I-12 OVER US 61 AIRLINE
I0012, East Baton Rouge, LA
Built 1986 Load: 41.7 t ADT: 32,092
I0010
FairOver: RAMP TO PORT ALLEN
0.18 M E of LA 1, West Baton Rouge, LA
Built 1968 Load: 41.7 t ADT: 7,586
I0010
FairOver: EB ON RAMP (US51)
I0010, St. John the Baptist, LA
Built 1972 Load: 41.7 t ADT: 15,642
US0190
FairOver: PONCHITOLAWA CR
US 190, St. Tammany, LA
Built 1976 Load: 41.7 t ADT: 25,200
I0010
FairOver: CANAL
0.5 M SW OF US 190, St. Tammany, LA
Built 1966 Load: 41.7 t ADT: 82,860
I0010
FairOver: DRAINAGE CANAL
I0010, St. Tammany, LA
Built 1966 Load: 41.7 t ADT: 1,600
I0010
FairOver: CANAL
0.7 M N OF US 190, St. Tammany, LA
Built 1966 Load: 41.7 t ADT: 55,785
I0010
FairOver: CANAL
0.7 M N OF US 190, St. Tammany, LA
Built 1966 Load: 41.7 t ADT: 1,600
I0010
FairOver: W PEARL RIVER
2.1 Mi. E of I-59, St. Tammany, LA
Built 1970 Load: 41.7 t ADT: 55,785
I0010
FairOver: W PEARL RIVER
6.2 Mi. W of MS 607, St. Tammany, LA
Built 1970 Load: 41.7 t ADT: 1,600
I0012
FairOver: VINCENT BAYOU
I0012, St. Tammany, LA
Built 1970 Load: 41.7 t ADT: 78,215
I0012
FairOver: VINCENT BAYOU
I0012, St. Tammany, LA
Built 1970 Load: 41.7 t ADT: 29,236
I0012
FairOver: I-12 RAMP OVER I-59 SB
I0012, St. Tammany, LA
Built 1970 Load: 41.7 t ADT: 9,838
US0190
FairOver: PONCHATOULA CREEK C
US0190, Tangipahoa, LA
Built 1975 Load: 41.7 t ADT: 21,045
I0055
FairOver: I-55 OVER LA 1048
I0055, Tangipahoa, LA
Built 1967 Load: 41.7 t ADT: 21,736
I0055
FairOver: I-55 OVER LA 1049
I0055, Tangipahoa, LA
Built 1966 Load: 41.7 t ADT: 21,762
I0055
FairOver: I-55 OVER LA 1049
I0055, Tangipahoa, LA
Built 1966 Load: 41.7 t ADT: 17,665
I0055
FairOver: PARISH ROAD
I0055, Tangipahoa, LA
Built 1966 Load: 41.7 t ADT: 21,762
I0012
FairOver: BEDICO CREEK
I0012, Tangipahoa, LA
Built 1975 Load: 41.7 t ADT: 53,386
I0012
FairOver: BEDICO CREEK
I0012, Tangipahoa, LA
Built 1975 Load: 41.7 t ADT: 17,665
LA1040
FairOver: LA 1040 OVER I-55
LA1040, Tangipahoa, LA
Built 1970 Load: 41.7 t ADT: 7,190
LA3234
FairOver: I0055
1.65 MI WEST INTER US 51, Tangipahoa, LA
Built 1995 Load: 41.7 t ADT: 18,303
LA1075
FairOver: DUMMY BRANCH
LA1075, Washington, LA
Built 1980 Load: 41.7 t ADT: 2,917
LA1075
FairOver: LEES CREEK
LA1075, Washington, LA
Built 1980 Load: 41.7 t ADT: 2,917
LA0034
FairOver: LA 34 OVER I-20
LA 34 OVER I-20, Ouachita, LA
Built 1965 Load: 41.8 t ADT: 20,451
KYLE ROAD
FairOver: BAYOU LACASSINE TRIBUTAR
0.2 M W Gott Rd., Jefferson Davis, LA
Built 2003 Load: 41.8 t ADT: 50
Loranger Rd
FairOver: MORGAN BRANCH
2 MI N OF JCT. 1062 & 40, Tangipahoa, LA
Built 1999 Load: 41.8 t ADT: 2,504
SHRIMPERS ROW RD
FairOver: KINGS BAYOU/COULEE CANAL
1.1 MI N OF LA 57, Terrebonne, LA
Built 2017 Load: 42.1 t ADT: 517
Sage Glenn Ln.
FairOver: DES POCHES COULEE
.08 Mi NE of W Pinhook Rd, Lafayette, LA
Built 1984 Load: 42.1 t ADT: 79
Daigle St.
FairOver: Francois Coulee
.60 MI E of LA 728-1, Lafayette, LA
Built 1999 Load: 42.1 t ADT: 475
LA0029
FairOver: BAYOU COCODRIE
0.05 MI WEST OF I-49, St. Landry, LA
Built 1987 Load: 42.1 t ADT: 665
COURTESY LANE
FairOver: COURTESY LANE DITCH
0.1 MI E OF US 171, Caddo, LA
Built 2005 Load: 42.1 t ADT: 1,500
LAKE IRWIN RD
FairOver: LITTLE LAKE LAFOURCHE
8.9 MI SW of LA 134, Morehouse, LA
Built 1999 Load: 42.1 t ADT: 280
STATEPRK
FairOver: POVERTY POINT RESERVOIR
0.4 MI EAST OF LA 17 ON P, Richland, LA
Built 1999 Load: 42.1 t ADT: 300
Clearlake Rd
FairOver: COLEWA BAYOU
2.1 MI E of LA 585, West Carroll, LA
Built 1992 Load: 42.1 t ADT: 312
US0171
FairOver: BARNES CREEK
5.4 MI NORTH OF LA 110, Beauregard, LA
Built 2007 Load: 42.1 t ADT: 8,463
US0171
FairOver: CREEK
0.2 MI N of LA 394, Beauregard, LA
Built 2007 Load: 42.1 t ADT: 12,041
US0171
FairOver: CREEK
2.5 MI S of LA 26, Beauregard, LA
Built 2007 Load: 42.1 t ADT: 8,021
US0171
FairOver: PALMETTO CREEK
1.2 MI S of LA 26, Beauregard, LA
Built 2007 Load: 42.1 t ADT: 12,041
US0171
FairOver: PALMETTO CREEK
14.0 MI NORTH OF LA 110 O, Beauregard, LA
Built 2007 Load: 42.1 t ADT: 8,021
NURSERY STREET
FairOver: BUXTON CREEK
0.1 MI E OF OAK STREET, Calcasieu, LA
Built 2020 Load: 42.1 t ADT: 485
MOUTON ROAD
FairOver: CHENE BAYOU
0.3 MI E OF LA 382, Jefferson Davis, LA
Built 2020 Load: 42.1 t ADT: 70
Durbin Rd
FairOver: STILL BRANCH
W. END OF WARDLINE RD, Tangipahoa, LA
Built 1986 Load: 42.1 t ADT: 1,252
HERMITAGE RD
FairOver: DEER RANGE CANAL
3.0 MI. WEST OF LA. 23, Plaquemines, LA
Built 1997 Load: 42.4 t
HERMITAGE RD
FairOver: SUZIE BAYOU
1.4 NI.WEST OF HWY 23., Plaquemines, LA
Built 1997 Load: 42.4 t
CLYDE PACE-VIVIAN
FairOver: OLD BLACK BAYOU
2.6 MI. SOUTH OF LA 170, Caddo, LA
Built 1997 Load: 42.4 t ADT: 133
COULEE CR RD
FairOver: COULEE CREEK
0.9 MI. S. OF INT. 435, Jackson, LA
Built 1984 Load: 42.4 t ADT: 530
RISER RD
FairOver: MONCRIEF CREEK
1.0 MI SE of US 167, Lincoln, LA
Built 2005 Load: 42.4 t ADT: 540
Showing 5,401-5,450 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.