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
US0190
PoorOver: WEST CALCASIEU RIVER REL
7.4 MI E OF INT LA 113, Allen, LA
Built 1980 Load: 26.2 t ADT: 3,923
LA0001
PoorOver: PORT ALLEN CANAL
1 MI N OF LA 988, West Baton Rouge, LA
Built 1960 Load: 26.2 t ADT: 25,347
LA0001
PoorOver: PORT ALLEN CANAL
1.2 MI S OF LA 76, West Baton Rouge, LA
Built 1960 Load: 26.2 t ADT: 14,751
Harvey Lavigne
PoorOver: CREEK
1.80 M E of LA 445, Tangipahoa, LA
Built 1970 Load: 26.2 t ADT: 681
LA3197
PoorOver: HOUMA CANAL
.4 MI EAST OF LA 182, Terrebonne, LA
Built 1938 Load: 26.3 t ADT: 119
LA0501
PoorOver: BURNT CABIN CREEK
1.27 MI SOUTH OF LA 4, Bienville, LA
Built 1960 Load: 26.3 t ADT: 218
LA0160
PoorOver: CYPRESS BAYOU RELIEF
.1 MI EAST OF LA 3, Bossier, LA
Built 1969 Load: 26.3 t ADT: 622
LA0146
PoorOver: CANEY CREEK
.6 MI EAST OF LA 9, Claiborne, LA
Built 1966 Load: 26.3 t ADT: 1,360
LA0146
PoorOver: CREEK
1.32 MI EAST OF LA 9, Claiborne, LA
Built 1966 Load: 26.3 t ADT: 1,360
LA0146
PoorOver: DRAIN
4.34 MI EAST OF LA 9, Claiborne, LA
Built 1968 Load: 26.3 t ADT: 1,360
LA0513
PoorOver: TEN MILE BAYOU
2.9 MI NORTH OF LA 483, De Soto, LA
Built 1969 Load: 26.3 t ADT: 243
LA0513
PoorOver: TEN MILE B RELIEF
3.0 MI NORTH OF LA 483, De Soto, LA
Built 1969 Load: 26.3 t ADT: 243
LA0012
PoorOver: SABINE RIVER
.56 MI WEST OF LA 109, Calcasieu, LA
Built 1938 Load: 26.3 t ADT: 3,365
LA0027
PoorOver: DINDE BAYOU
1.2 MI S of US 90, Calcasieu, LA
Built 1960 Load: 26.3 t ADT: 14,973
LA0506
PoorOver: CASTOR CREEK RELF
7.0 MI WEST OF US 165, Caldwell, LA
Built 1971 Load: 26.3 t ADT: 306
LA0507
PoorOver: EDWARDS MILL CREEK
1.0 MI W JCT LA 9, Bienville, LA
Built 1984 Load: 26.6 t ADT: 396
US0167
PoorOver: BAYOU DARBONNE RELIEF
1 Mi. S. of LA 151, Lincoln, LA
Built 1952 Load: 26.6 t ADT: 2,487
SOUTH MAIN ROAD
PoorOver: CREEK
1.6 MI N of LA 1126, Jefferson Davis, LA
Built 1970 Load: 26.6 t ADT: 150
LA0009
PoorOver: CHOCTAW CREEK
2.26 MI. NORTH OF LA 479, Natchitoches, LA
Built 1977 Load: 26.6 t ADT: 282
Harrisonburg
PoorOver: NANTACHES CREEK
3.84 MI. EAST OF US 71, Winn, LA
Built 1979 Load: 26.6 t ADT: 179
Van Buren St
PoorOver: CORPORATION CANAL
0.15 MI E OF LA 30, East Baton Rouge, LA
Built 1955 Load: 26.6 t ADT: 350
15th St
PoorOver: BOGUE CHITTO CREEK
15TH AVE SOUTH OF LA 10, Washington, LA
Built 1974 Load: 26.6 t ADT: 229
BELL OIL RD
PoorOver: BLUE BAYOU
1.6 MI WEST OF LA 26, Allen, LA
Built 1974 Load: 26.9 t ADT: 77
US0090
PoorOver: I-10/RAMPS
2.6 Mi E of LA 108, Calcasieu, LA
Built 1960 Load: 26.9 t ADT: 9,758
Lemon Rd
PoorOver: DRAINAGE BAYOU
1.0 M E of LA 19, East Baton Rouge, LA
Built 1965 Load: 26.9 t ADT: 542
Palmetto St OnRamp
PoorOver: KCS RR
2.4 MI EAST OF LA 3046, Orleans, LA
Built 1960 Load: 27.2 t ADT: 47,738
WPA Rd
PoorOver: BAYOU BOEUF
0.1 Mi. E. of La 182, St. Landry, LA
Built 1975 Load: 27.2 t ADT: 750
US0090
PoorOver: RAMOS BAYOU
4.1 MI EAST OF US 90, St. Mary, LA
Built 1932 Load: 27.2 t ADT: 7,504
LA0157
PoorOver: FLAT RIVER
.55 MI NORTH OF US 71, Bossier, LA
Built 1964 Load: 27.2 t ADT: 2,626
LA0002
PoorOver: BLACK BAYOU
1.0 MI EAST OF LA 521, Claiborne, LA
Built 1962 Load: 27.2 t ADT: 817
US0080
PoorOver: MILE CREEK
2.57 MI EAST OF US 371, Webster, LA
Built 1948 Load: 27.2 t ADT: 9,109
LA0531
PoorOver: PARMERS CREEK
2.2 MI NORTH OF LA 792, Webster, LA
Built 1967 Load: 27.2 t ADT: 236
LA0531
PoorOver: BRUSHY CREEK
1.66 MI NORTH OF LA 532, Webster, LA
Built 1966 Load: 27.2 t ADT: 1,689
LA0151
PoorOver: STOWE CREEK
.14 MI EAST OF LA 33, Union, LA
Built 1961 Load: 27.2 t ADT: 527
LA0014
PoorOver: BAYOU
9.2 MI EAST OF LA 27, Calcasieu, LA
Built 1966 Load: 27.2 t ADT: 1,363
LEONARD LITTLE RD.
PoorOver: CANAL
0.08 MI. E. OF INT. LA 27, Cameron, LA
Built 1964 Load: 27.2 t ADT: 8
LA0117
PoorOver: BLACKLAND BRANCH
4.14 MI NORTH OF LA 28, Vernon, LA
Built 1954 Load: 27.2 t ADT: 1,513
US0071
PoorOver: LITTLE NATCHEZ BAYOU
0.58 MI. NORTH OF LA 477, Winn, LA
Built 1955 Load: 27.2 t ADT: 1,457
LA0126
PoorOver: BEECH CREEK
2.1 MI WEST OF LA 3239, Caldwell, LA
Built 1970 Load: 27.2 t ADT: 570
LA 124
PoorOver: LARTO LAKE BAYOU
27.4 MI S OF US 84, Catahoula, LA
Built 1958 Load: 27.2 t ADT: 514
Henderson Bayou Rd
PoorOver: HENDERSON BAYOU
3.2M WS OF PORT VINCENT, Ascension, LA
Built 1990 Load: 27.2 t ADT: 300
Rue De Kajun
PoorOver: BAYOU
.40 MI. WEST LA 70, Assumption, LA
Built 1999 Load: 27.2 t ADT: 192
Gibbens Rd
PoorOver: CYPRESS BAYOU
0.4 Mi. S of LA 423, East Baton Rouge, LA
Built 1970 Load: 27.2 t ADT: 2,125
John Lewis Rd
PoorOver: Little Valley Bayou
0.3 Mi. E. of La 83, Iberia, LA
Built 1975 Load: 27.5 t ADT: 422
LA0118
PoorOver: WEST TORO CREEK
3.04 MILES EAST OF US 171, Sabine, LA
Built 1985 Load: 27.5 t ADT: 1,471
Jackson Rd
PoorOver: BEAVER CREEK
3.9 MI. WEST OF PRID, East Baton Rouge, LA
Built 1971 Load: 27.5 t ADT: 1,379
I0010
PoorOver: I-10 OVER LA 415-WESTOVE
I0010, West Baton Rouge, LA
Built 1969 Load: 27.5 t ADT: 41,644
I0020
PoorOver: BEAR CREEK
.54 MI EAST OF US 80, Bienville, LA
Built 1964 Load: 27.9 t ADT: 37,514
I0020
PoorOver: M.P. RR
.6 MI EAST OF US 80, Caddo, LA
Built 1965 Load: 27.9 t ADT: 98,318
Pine Island Rd
PoorOver: Warren Canal
5.9 Mi W of LA 82, Vermilion, LA
Built 2000 Load: 28.1 t ADT: 50
Showing 12,451-12,500 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.