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
US0171
GoodOver: PHILLIPS CREEK
0.51 MI. SOUTH OF LA 175, Sabine, LA
Built 2006 Load: 48.1 t ADT: 4,790
US0171
GoodOver: HARPOON BAYOU RELIEF
0.28 MI. SOUTH OF LA 175, Sabine, LA
Built 2006 Load: 48.1 t ADT: 4,790
US0171
GoodOver: HARPOON BAYOU
0.08 MI. SOUTH OF LA 175, Sabine, LA
Built 2006 Load: 48.1 t ADT: 4,790
LA0399
GoodOver: WHISKEY CHITTO CREEK
5.72 MI. SOUTH OF LA 10, Vernon, LA
Built 2001 Load: 48.1 t ADT: 957
I0010
GoodOver: PANAMA CANAL
I0010, Ascension, LA
Built 1975 Load: 48.1 t ADT: 49,274
LA0662
GoodOver: PUMPING STATION BRIDGE
2.04 MI N OF END OF LA662, Assumption, LA
Built 1998 Load: 48.1 t ADT: 2,905
LA0010
GoodOver: CREEK
0.7 M E OF US 51, Tangipahoa, LA
Built 1966 Load: 48.1 t ADT: 3,768
HAPPYWOODS Rd
GoodOver: I-12
0.6 M W OF I-55, Tangipahoa, LA
Built 1970 Load: 48.1 t ADT: 6,680
LA0106
GoodOver: Bayou Beouf
0.5 M E of I-49, Avoyelles, LA
Built 2021 Load: 48.3 t ADT: 1,294
LA0070
GoodOver: STREAM
1.4 M S of LA 70&LA 22, Ascension, LA
Built 1966 Load: 48.3 t ADT: 24,210
St Vincent Rd
GoodOver: SAINT VINCENT BAYOU
0.4 MI S OF LA 402, Assumption, LA
Built 2015 Load: 48.3 t ADT: 96
CAL ROAD
GoodOver: CLAY CUT BAYOU
0.2 M S OF LA 73, East Baton Rouge, LA
Built 2023 Load: 48.3 t ADT: 2,074
W Congress Street
GoodOver: Queue de Tortue Bayou
0.6 Mi E of LA 343, Lafayette, LA
Built 2018 Load: 48.6 t ADT: 1,687
Lebesque Rd
GoodOver: Coulee Mine
0.6 Mi. W. Of LA 182, Lafayette, LA
Built 2019 Load: 48.6 t ADT: 5,010
ROSSIGNOL ROAD
GoodOver: BELL CITY DRAINAGE CANAL
1.8 MI W OF LA 14, Calcasieu, LA
Built 2019 Load: 48.6 t ADT: 353
US0061
GoodOver: BAKER CANAL
500 FEET SOUTH OF LA.964, East Baton Rouge, LA
Built 2016 Load: 48.6 t ADT: 16,910
Needham Rd
GoodOver: CREEK
3 TENTHS OF A MILE NORTH, St. Helena, LA
Built 2013 Load: 48.6 t ADT: 250
LINTON ROAD
GoodOver: FLAT RIVER
2.5 MI E OF LA 3, Bossier, LA
Built 2022 Load: 48.9 t ADT: 6,500
I0049
GoodOver: MCCAIN CREEK
0.03 MI. S. OF LA 1, Caddo, LA
Built 2016 Load: 48.9 t ADT: 6,846
George Mashon Rd
GoodOver: Little Natalbany River
1.24 Mi. S. of LA 40, Livingston, LA
Built 2020 Load: 48.9 t ADT: 127
Malapart Rd.
GoodOver: MIMS COULEE
0.5M WEST OF LA 182, Lafayette, LA
Built 1991 Load: 49.0 t ADT: 780
I0049
GoodOver: MT ZION RD
RAMP WS AT LA 3132 INTG, Caddo, LA
Built 1991 Load: 49.0 t ADT: 87,567
LA0478
GoodOver: SAND CREEK
0.83 MILES EAST OF LA 120, Natchitoches, LA
Built 1996 Load: 49.0 t ADT: 172
I0049
GoodOver: LENA-FLATWOODS RD.
4.68 MI. NORTH OF LA 8, Rapides, LA
Built 1987 Load: 49.0 t ADT: 14,042
I0110
GoodOver: 22 ST. OFF RAMP
I0110, East Baton Rouge, LA
Built 1970 Load: 49.0 t ADT: 8,250
I0110
GoodOver: CANAL
0.3 M N of US 61, East Baton Rouge, LA
Built 1976 Load: 49.0 t ADT: 64,059
Millerville Rd
GoodOver: HONEY CUT BAYOU
0.5 M N OF I12, East Baton Rouge, LA
Built 2006 Load: 49.0 t ADT: 6,500
LA0021
GoodOver: DRAIN
2.2 M N OF LA 10, Washington, LA
Built 1965 Load: 49.0 t ADT: 6,741
Sauve Road
GoodOver: Soniat Canal
0.5 Mi. S. f US 61, Jefferson, LA
Built 2021 Load: 49.2 t ADT: 10,700
North Rd
GoodOver: DRAINAGE CANAL
1.7 Mi N of La 14, Vermilion, LA
Built 1966 Load: 49.2 t ADT: 2,043
SWAN LAKE RD.(S)
GoodOver: FLAT RIVER
2.2 MI E OF US 71, Bossier, LA
Built 2020 Load: 49.2 t ADT: 10
PLAINVIEW COMM RD
GoodOver: BIG BRANCH CREEK
1.7 MILES NE OF LA 392, Vernon, LA
Built 2016 Load: 49.2 t
LA0111
GoodOver: UNNAMED BRANCH
4.17 MI EAST JCT US 171, Vernon, LA
Built 1997 Load: 49.2 t ADT: 937
Eraste Landry Rd.
GoodOver: SUNBEAM COULEE
0.10 Mi W of LA 3184, Lafayette, LA
Built 2011 Load: 49.6 t ADT: 4,092
I0010-E
GoodOver: LA 328
6.6 MI E OF US 167, St. Martin, LA
Built 2020 Load: 49.6 t ADT: 50,425
I0010-W
GoodOver: LA 328
5.3 MI W OF LA 347, St. Martin, LA
Built 2020 Load: 49.6 t ADT: 4,908
North Giles St
GoodOver: LITTLE CROOKED CREEK
0.77 MI EAST OF US 371, Webster, LA
Built 2011 Load: 49.6 t ADT: 650
LA0404
GoodOver: BAYOU CHOCTAW
0.4 MI E OF LA 75, Iberville, LA
Built 2019 Load: 49.6 t ADT: 551
I0010
GoodOver: ON RAMP I-10E.FROM US90
.1 MI EAST OF US 90, Orleans, LA
Built 1967 Load: 49.9 t ADT: 7,620
N. Bayou Black Rd
GoodOver: Hanson Canal
0.1 MI NW OF LA 182, Terrebonne, LA
Built 2021 Load: 49.9 t ADT: 9,159
Andre Street
GoodOver: Gaston Coulee
.25 MI E of N Church St, Lafayette, LA
Built 2019 Load: 49.9 t ADT: 75
I0049
GoodOver: LA 511
I-49 OVER LA 511, Caddo, LA
Built 1993 Load: 49.9 t ADT: 87,568
US0080
GoodOver: KCS RAILROAD
1.16 MI WEST OF US 371, Webster, LA
Built 2005 Load: 49.9 t ADT: 4,052
I0049
GoodOver: DRAINAGE DITCH
SOUTH I-49 / US 71 INTG., Rapides, LA
Built 1992 Load: 49.9 t ADT: 15,642
Guilde Road
GoodOver: Riley Creek
0.1 Mi S of Tarpley Rd., LaSalle, LA
Built 2018 Load: 49.9 t ADT: 119
US 61
GoodOver: Bayou Manchac
0.80 Mi. N. of LA 427, East Baton Rouge, LA
Built 2021 Load: 49.9 t ADT: 48,026
US 61
GoodOver: Bayou Manchac
1.46 Mi S of la 948, East Baton Rouge, LA
Built 2021 Load: 49.9 t ADT: 29,303
I0010
GoodOver: BRIDGE 290 EBL
4.85 M W of LA 415&I-10, West Baton Rouge, LA
Built 1973 Load: 49.9 t ADT: 80,618
I0055
GoodOver: ICG RAILROAD
I0055, Tangipahoa, LA
Built 1968 Load: 49.9 t ADT: 21,736
E WASHINGTON ST
GoodOver: TRIBUTARY TO BAYOU PIERR
0.05 MI WEST OF LA 1, Caddo, LA
Built 1986 Load: 50.2 t ADT: 100
Showing 10,851-10,900 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.