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
Mark Twain Rd.
GoodOver: LYONS POINT GULLY
1.2 MILES WEST OF LA 3007, Acadia, LA
Built 2001 Load: 25.3 t ADT: 100
Lafosse Rd
GoodOver: Coulee
0.3 Mi S. of La 92, Acadia, LA
Built 2001 Load: 25.3 t ADT: 96
Clement Rd.
GoodOver: Coulee
0.2 Mi W. Of La 91, Acadia, LA
Built 2001 Load: 25.3 t ADT: 576
Howard Rd.
GoodOver: Pointe Aux Loups Bayou
0.2 Mi. S. of La 98, Acadia, LA
Built 1999 Load: 25.3 t ADT: 144
Schultz Rd.
GoodOver: COLE GULLY
1.9 miles East of HWY 13, Acadia, LA
Built 2001 Load: 25.3 t ADT: 144
Schultz Rd.
GoodOver: GRANDE COULEE
0.02 MI E OF LA 13, Acadia, LA
Built 2001 Load: 25.3 t ADT: 240
Ed Thibodeaux Rd.
GoodOver: WICKOFF BAYOU
1.25 Mi W of La 95, Acadia, LA
Built 2001 Load: 25.3 t ADT: 960
Allie Young Rd
GoodOver: Barwick Bayou
0.6 MI E of LA 97, Acadia, LA
Built 1999 Load: 25.3 t ADT: 288
Pelican Rd.
GoodOver: DES CANNES BAYOU
0.2 Mi N of La 10, Evangeline, LA
Built 2013 Load: 25.3 t ADT: 27
Jennings Rd.
GoodOver: BAYOU TECHE
1.8 Miles South of LA 742, St. Landry, LA
Built 2002 Load: 25.3 t ADT: 1,750
Williamson Spur Rd
GoodOver: DRAINAGE CANAL
1.2 MI NE of US 71, St. Landry, LA
Built 2002 Load: 25.3 t ADT: 210
LA0001
GoodOver: MAHLIN BAYOU
.6 MI NORTH OF LA 173, Caddo, LA
Built 1940 Load: 25.3 t ADT: 9,576
GRAND MARAIS ROAD
GoodOver: GUM GULLY
1.2 MI W of LA 395, Jefferson Davis, LA
Built 1987 Load: 25.3 t ADT: 50
Dry Prong Creek Rd
GoodOver: DRY PRONG CREEK
1.07 M. E. OF LA 123 NEAR, Grant, LA
Built 2005 Load: 25.3 t ADT: 36
US0165
GoodOver: BLACK BAYOU
0.6 MILES NORTH OF LA 843, Caldwell, LA
Built 2004 Load: 25.3 t ADT: 6,071
US0090
GoodOver: WESTBOUND ON RAMP
0.1 M E of US 90&LA 662, Assumption, LA
Built 1998 Load: 25.3 t ADT: 12,192
W. Johnson St
GoodOver: CORPORATION CANAL
BATON ROUGE, East Baton Rouge, LA
Built 1970 Load: 25.3 t ADT: 2,500
I0010
GoodOver: EB RAMP TO LA1 SB
1.9 M E of LA 415, West Baton Rouge, LA
Built 1968 Load: 25.3 t ADT: 4,035
GOLDEN MEADOW DR.
GoodOver: DRAIN
1.70 MI EAST OF US 90, St. Tammany, LA
Built 1999 Load: 25.3 t ADT: 200
Dummyline Rd
GoodOver: BLACK RIVER
1.54 M W OF LA 1077, St. Tammany, LA
Built 1990 Load: 25.3 t ADT: 1,563
LA0024
GoodOver: TERREBONNE BAYOU
LOGMI 04.69-LA 24 SPUR, Terrebonne, LA
Built 1981 Load: 25.4 t ADT: 259
Choupique Road
GoodOver: LA1162
0.66 Mi W of LA 29, Evangeline, LA
Built 2019 Load: 25.4 t ADT: 111
Butler Hill Rd
GoodOver: Cypress Bayou Trib
0.3 MI S OF LA 160, Bossier, LA
Built 2019 Load: 25.4 t ADT: 500
Young Rd.
GoodOver: Bear Branch Trib
0.5 MI. S. OF LA 160 ON Y, Bossier, LA
Built 2016 Load: 25.4 t ADT: 220
Sibley Rd
GoodOver: Black Bayou
1.0 MI. N. OF LA 162, Bossier, LA
Built 2016 Load: 25.4 t ADT: 12
Aristile Rd
GoodOver: BAYOU LAROUSE
ARISTILE RD 0.5 MI E. OF, Assumption, LA
Built 2012 Load: 25.4 t ADT: 1,720
Stumberg Ln
GoodOver: JACKS BAYOU
BATON ROUGE STUMBERG LN., East Baton Rouge, LA
Built 1999 Load: 25.4 t ADT: 13,970
Wilson-Clinton Rd
GoodOver: PRETTY CREEK
.45 MI. W OF LA 67, East Feliciana, LA
Built 2007 Load: 25.4 t ADT: 84
US0090-B
GoodOver: CITY STREETS
0.09 MI E OF MISS. RIVER, Orleans, LA
Built 1957 Load: 25.6 t ADT: 67,143
DIAGONAL DR
GoodOver: CITY PARK LAGOON
O.1MI.N.OF MAGNOLIA, Orleans, LA
Built 1939 Load: 25.6 t
JEAN DUOS RD
GoodOver: JOE MARCEL BAYOU
0.4 MI. E. OF LA 3097, Evangeline, LA
Built 2016 Load: 25.6 t ADT: 161
E. Pont Des Mouton
GoodOver: VERMILION RIVER
1.3 MI E OF LA 728-1, Lafayette, LA
Built 1986 Load: 25.6 t ADT: 2,530
I0049
GoodOver: SWIFT BAYOU CANAL
I-49 / LA 530 INTG., Caddo, LA
Built 2013 Load: 25.6 t ADT: 8,115
ROUTE 66
GoodOver: CREEK RELIEF
3.5 MI WEST OF LA 27, Calcasieu, LA
Built 2001 Load: 25.6 t ADT: 345
EDGERLY DQ RD
GoodOver: GULLY
0.8 MI N of BENNETT RD., Calcasieu, LA
Built 2002 Load: 25.6 t ADT: 443
Flagon Rd.
GoodOver: FLAGON BAYOU
0.57 M. W. OF JCT. US 167, Grant, LA
Built 1997 Load: 25.6 t ADT: 400
Bayou Derbonne Rd
GoodOver: BAYOU DERBONNE
3.0 MILES WEST OF LA 1, Natchitoches, LA
Built 2012 Load: 25.6 t ADT: 104
Carolyn St
GoodOver: CADNEY BAYOU TRIB. II
0.6 MILES NORTH OF LA 494, Natchitoches, LA
Built 2001 Load: 25.6 t ADT: 102
LA0497
GoodOver: LITTLE SPRING CREEK
0.7 MI. NORTH OF US 165, Rapides, LA
Built 1984 Load: 25.6 t ADT: 1,135
RUSSEL RD
GoodOver: BAYOU SCIE TRIBUTARY
0.78 MI. SE OF LA 120, Sabine, LA
Built 2001 Load: 25.6 t ADT: 170
WEBSTER MARICLE RD
GoodOver: SIXMILE CREEK
0.5 M. W. OF LA 113, Vernon, LA
Built 1993 Load: 25.6 t ADT: 250
Windmill Rd
GoodOver: RHINEHART CREEK
.1 mile fr blade loop jct, LaSalle, LA
Built 2002 Load: 25.6 t ADT: 60
Perkins Rd
GoodOver: DAWSON CREEK BRIDGE
LA 427 APPROX. 1.04 MILES, East Baton Rouge, LA
Built 2010 Load: 25.6 t ADT: 25,100
I0055
GoodOver: SWAMP
12.30 MILES NORTH OF JCT, St. John the Baptist, LA
Built 2008 Load: 25.6 t ADT: 27,551
I0055
GoodOver: SWAMP
4.50 MILES NORTH OF JCT I, St. John the Baptist, LA
Built 2008 Load: 25.6 t ADT: 27,551
I0055
GoodOver: SWAMP
4 MILES SOUTH OF JCT I55, Tangipahoa, LA
Built 2008 Load: 25.6 t ADT: 17,665
LA0024
GoodOver: BAYOU TERREBONNE
LA0024, Terrebonne, LA
Built 1974 Load: 25.9 t ADT: 312
LA0013
GoodOver: DRAIN
0.48 MI NORTH OF LA 104, Evangeline, LA
Built 1970 Load: 25.9 t ADT: 5,382
US0090
GoodOver: Darnell Rd
3.08 MI E of LA 83, Iberia, LA
Built 2002 Load: 25.9 t ADT: 11,497
US0090
GoodOver: Darnell Rd
2.8 MI W of LA 85, Iberia, LA
Built 2002 Load: 25.9 t ADT: 10,090
Showing 6,851-6,900 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.