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
I0055
FairOver: I-55 OVER LA 16
I0055, Tangipahoa, LA
Built 1970 Load: 44.5 t ADT: 21,762
I0012
FairOver: YELLOW WATER RIVER REL.
I0012, Tangipahoa, LA
Built 1970 Load: 44.5 t ADT: 21,736
I0020
FairOver: US 79/80
9.4 MI W OF US 371, Bossier, LA
Built 1975 Load: 44.7 t ADT: 25,379
LA0002
FairOver: FIVE-MILE-SLOUGH
LA0002, West Carroll, LA
Built 1981 Load: 44.7 t ADT: 2,350
Jimmy Brown Rd
FairOver: BIG BAYOU
0.67 MI. SOUTH OF LA 1, Rapides, LA
Built 2002 Load: 44.7 t ADT: 450
FLORIDA AVE
FairOver: CORINNE CANAL
1.2 MI N OF LA 39, St. Bernard, LA
Built 2011 Load: 45.0 t ADT: 90
Williams Ave
FairOver: DRAIN CANAL
HOLLYWOOD RD AT WILLIAMS, Terrebonne, LA
Built 2004 Load: 45.0 t ADT: 6,696
LA0012
FairOver: OLD RIVER SLOUGH
4.5 MI W OF LA 109, Calcasieu, LA
Built 2022 Load: 45.0 t ADT: 4,600
George Lambert Rd
FairOver: NEW RIVER
46 Ft N Of LA 429, Ascension, LA
Built 1984 Load: 45.0 t ADT: 300
E. Roosevelt St
FairOver: CORPORATION CANAL
52 W OF THOMAS DELPIT DR, East Baton Rouge, LA
Built 1967 Load: 45.0 t ADT: 914
Groom Rd
FairOver: CYPRESS BAYOU
0.3 M W OF LA 19, East Baton Rouge, LA
Built 1977 Load: 45.0 t ADT: 2,522
LA0448
FairOver: STROTHER CREEK
2.0 M N OF LA 37, St. Helena, LA
Built 1962 Load: 45.0 t ADT: 547
LA3152
FairOver: I 10
3.7 MI EAST OF LA 49, Jefferson, LA
Built 1967 Load: 45.4 t ADT: 28,780
LA3152
FairOver: I 10
3.7 MI EAST OF LA 49, Jefferson, LA
Built 1967 Load: 45.4 t ADT: 55,210
I0010
FairOver: LAWRENCE CANAL
2.0 MI EAST OF US 90, Orleans, LA
Built 1970 Load: 45.4 t ADT: 114,172
I0010
FairOver: LAWRENCE CANAL
2.0 MI EAST OF US 90, Orleans, LA
Built 1970 Load: 45.4 t ADT: 1,600
I0010 SERVICE RD
FairOver: LAWRENCE CANAL
2.0 MI EAST OF US 90, Orleans, LA
Built 1970 Load: 45.4 t ADT: 4,380
I0010
FairOver: LAWRENCE CANAL
2.0 MI EAST OF US 90, Orleans, LA
Built 1970 Load: 45.4 t ADT: 6,735
US0090
FairOver: LA0014
1.86 Miles East of LA 675, Iberia, LA
Built 1969 Load: 45.4 t ADT: 31,222
US0090
FairOver: LA0014
0.6 Miles NW of LA 329, Iberia, LA
Built 1969 Load: 45.4 t ADT: 10,090
Sylvia Rd.
FairOver: COULEE
0.40 Mi S of US 90, Lafayette, LA
Built 1989 Load: 45.4 t ADT: 53
US0190
FairOver: BAYOU DOZA
1.0 MI WEST OF LA 95, St. Landry, LA
Built 2001 Load: 45.4 t ADT: 4,700
LA0029
FairOver: BAYOU BOUEF (WHITEVILLE)
1.55 MI N OF LA 182, St. Landry, LA
Built 1998 Load: 45.4 t ADT: 999
LA0029
FairOver: BAYOU BOEUF
4.47 MI WEST OF LA 182, St. Landry, LA
Built 1998 Load: 45.4 t ADT: 999
US0090
FairOver: US 90 OVER LA 3211
US 90 EB over LA 3211, St. Mary, LA
Built 2001 Load: 45.4 t ADT: 10,900
US0090
FairOver: RAMP F
1.40 MI E of Berwick Exit, St. Mary, LA
Built 1977 Load: 45.4 t ADT: 3,938
PINES RD
FairOver: I-20
1.9 MI EAST OF LA 526, Caddo, LA
Built 1977 Load: 45.4 t ADT: 35,800
US0171
FairOver: COOK CREEK
7.6 MI. N. OF US 84, De Soto, LA
Built 2000 Load: 45.4 t ADT: 6,256
US0171
FairOver: RAMBIN BAYOU
6.4 MI. N. OF LA 3015, De Soto, LA
Built 2000 Load: 45.4 t ADT: 6,956
NORRIS RD
FairOver: I 20
3.5 MI EAST OF LA 145M, Lincoln, LA
Built 1960 Load: 45.4 t ADT: 3,620
I0020
FairOver: BAYOU DESPAIR
6.0 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: BAYOU DESPAIR
6.0 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: LAKE ONE BAYOU
2.8 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: LAKE ONE BAYOU
2.8 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: PANOLA BAYOU
2.2 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: PANOLA BAYOU
2.2 MI WEST OF US 65, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: WALNUT BAYOU
.01 MI WEST OF WEST INT O, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: WALNUT BAYOU
.01 MI WEST OF WEST INT O, Madison, LA
Built 1975 Load: 45.4 t ADT: 31,481
I0020
FairOver: DRAINAGE CANAL
1.3 MI EAST OF WEST INT O, Madison, LA
Built 1975 Load: 45.4 t ADT: 30,064
I0020
FairOver: DRAINAGE CANAL BRIDGE
1.3 MI EAST OF WEST INT O, Madison, LA
Built 1975 Load: 45.4 t ADT: 29,961
I0020
FairOver: CYPRESS BAYOU BRIDGE
.7 MI EAST OF EAST INT OF, Madison, LA
Built 1975 Load: 45.4 t ADT: 28,276
I0020
FairOver: YOUNGS BAYOU
.7 MI EAST OF LA 594, Ouachita, LA
Built 1965 Load: 45.4 t ADT: 31,285
I0210
FairOver: LOUISIANA STREET
0.8 MI. E. OF LA 385, Calcasieu, LA
Built 1975 Load: 45.4 t ADT: 30,773
I0210
FairOver: LOUISIANA STREET
1.6 MI W OF LA 14, Calcasieu, LA
Built 1975 Load: 45.4 t ADT: 30,723
I0210
FairOver: ENTERPRISE BOULEVARD
.86 MI EAST OF LA 385, Calcasieu, LA
Built 1975 Load: 45.4 t ADT: 608
I0010
FairOver: W BAYOU CHENE
2.0 MI. E. OF LA 395, Jefferson Davis, LA
Built 1965 Load: 45.4 t ADT: 838
I0010
FairOver: CHENE BAYOU
2.6 MI WEST OF LA 26, Jefferson Davis, LA
Built 1965 Load: 45.4 t ADT: 11,635
LA0490
FairOver: LA 490 BAYOU BOURBEAUX
2.3 MI. E OF LA 1 & LA 49, Natchitoches, LA
Built 1996 Load: 45.4 t ADT: 138
LA0113
FairOver: TEN MILE CREEK RELIEF
0.79 MI. WEST OF LA 462, Rapides, LA
Built 1984 Load: 45.4 t ADT: 822
LA0006
FairOver: CRIB CREEK
4.46 M E OF E JCT LA 3118, Sabine, LA
Built 1966 Load: 45.4 t ADT: 5,031
Showing 5,801-5,850 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.