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
LA0490
GoodOver: CANE RIVER
1.0 MI. SW OF LA 1, Natchitoches, LA
Built 1977 Load: 35.4 t ADT: 142
I0049
GoodOver: I-49 OVER LA 478
I-49 OVER LA478, Natchitoches, LA
Built 1986 Load: 35.4 t ADT: 18,305
I0049
GoodOver: I-49 OVER LA 478
I-49 OVER LA478, Natchitoches, LA
Built 1986 Load: 35.4 t ADT: 28,142
EIGHT MILE LP
GoodOver: I-49
0.87 MI. NORTH OF LA 6, Natchitoches, LA
Built 1986 Load: 35.4 t ADT: 1,510
I0049
GoodOver: I-49 OVER LA 181
2 MILES W OF CHENEYVILLE, Rapides, LA
Built 1985 Load: 35.4 t ADT: 20,572
I0049
GoodOver: I-49 OVER LA 181
2 MILES W OF CHENEYVILLE, Rapides, LA
Built 1985 Load: 35.4 t ADT: 11,969
I0049
GoodOver: US 167
I-49 / US 167 INTG., Rapides, LA
Built 1994 Load: 35.4 t ADT: 31,285
LA0028
GoodOver: FARMER CREEK
0.9 MI. E. JCT 469, Vernon, LA
Built 2005 Load: 35.4 t ADT: 6,456
LA0028
GoodOver: FARMER CREEK
0.9 MI E JCT 469 & LA 28E, Vernon, LA
Built 2003 Load: 35.4 t ADT: 6,952
LA0028
GoodOver: EAST FORK CREEK
3.5 MI. WEST OF JCT LA121, Vernon, LA
Built 2005 Load: 35.4 t ADT: 6,952
LA0028
GoodOver: EAST FORK CREEK
3.5 MI WEST OF JCT LA 121, Vernon, LA
Built 2003 Load: 35.4 t ADT: 6,456
LA0004
GoodOver: TURKEY CREEK
.7 MI EAST OF LA 15, Franklin, LA
Built 1977 Load: 35.4 t ADT: 6,635
LA0004
GoodOver: RELIEF CANAL BRIDGE
.9 MI EAST OF LA 15, Franklin, LA
Built 1976 Load: 35.4 t ADT: 6,635
I0010
GoodOver: NEW RIVER
0.01 Mi S of LA 429, Ascension, LA
Built 1975 Load: 35.4 t ADT: 555
LA0001
GoodOver: B.PLAQUEMINE
0.37 M SE of LA 1&LA 77, Iberville, LA
Built 1979 Load: 35.4 t ADT: 10,350
Harris Cornor Rd
GoodOver: CREEK
3.2 MILES FROM US 61, West Feliciana, LA
Built 2011 Load: 35.4 t ADT: 51
I0055
GoodOver: I-10 & US 51 & SWAMP
11 Mi S of LA 22, St. John the Baptist, LA
Built 1975 Load: 35.4 t ADT: 24,000
I0055
GoodOver: I-55 OFF RAMP @ US 51
0.1 M N OF US 51, St. John the Baptist, LA
Built 1975 Load: 35.4 t ADT: 15,642
LA0021
GoodOver: BOGUE CHITTO RIVER
LA0021, St. Tammany, LA
Built 1974 Load: 35.4 t ADT: 8,257
LA0021
GoodOver: BOGUE CHITTO RIVER
LA0021, St. Tammany, LA
Built 1974 Load: 35.4 t ADT: 7,481
LA0040
GoodOver: DRAIN
0.6 M E OF LA 25, St. Tammany, LA
Built 1979 Load: 35.4 t ADT: 3,689
LA0445
GoodOver: LA 445 OVER I-12
I0012, Tangipahoa, LA
Built 1975 Load: 35.4 t ADT: 8,876
I0055
GoodOver: PASS MANCHAC
0.2 M W OF US 51, Tangipahoa, LA
Built 1977 Load: 35.4 t ADT: 39,850
I0055
GoodOver: PASS MANCHAC
11.0 M S OF LA 22, Tangipahoa, LA
Built 1977 Load: 35.4 t ADT: 14,300
I0055
GoodOver: ON RAMP NORTH US 51
9.9 M S OF LA 22, Tangipahoa, LA
Built 1979 Load: 35.4 t ADT: 8,115
LA0021
GoodOver: LEE CREEK
4 MI N JCT LA1075 & LA21, Washington, LA
Built 1987 Load: 35.4 t ADT: 7,160
LA0439
GoodOver: BOGUE LUSA CREEK
LA0439, Washington, LA
Built 1980 Load: 35.4 t ADT: 1,235
LA0010
GoodOver: PEARL RIVER
1.4MI EAST OF LA 10/LA 21, Washington, LA
Built 1998 Load: 35.5 t ADT: 3,700
Gazette Rd
GoodOver: Bayou Queue De Tortue
0.2 Miles West of LA 724, Lafayette, LA
Built 2018 Load: 35.6 t ADT: 586
LA1252
GoodOver: Bayou Vermilion
4.2 Mi E of I49 Front RD, Lafayette, LA
Built 2022 Load: 35.6 t ADT: 610
LA00339-S
GoodOver: Bayou Parc Perdue
0.9 Mi E of LA 339, Lafayette, LA
Built 2022 Load: 35.6 t ADT: 4,993
LA0103
GoodOver: BAYOU COURTBLEAU
1.0 MI E of LA 743, St. Landry, LA
Built 2009 Load: 35.6 t ADT: 2,000
LA3147
GoodOver: EXCH OIL & GAS CORP LINE
8.5 MI S. OF LA 82, Vermilion, LA
Built 1982 Load: 35.6 t ADT: 221
Mott Rd
GoodOver: Boggs Creek
4.1 MI NORTH OF LA 2, Bossier, LA
Built 1994 Load: 35.6 t ADT: 240
Buncombe Rd
GoodOver: TRIB TO BOGGY BAYOU
0.2 MI. E. OF LA 169, Caddo, LA
Built 2016 Load: 35.6 t ADT: 80
LA0525
GoodOver: CREEK
0.61 MI. E OF US 171, Caddo, LA
Built 2003 Load: 35.6 t ADT: 4,294
SOUTH LAKESHORE DR
GoodOver: TRIB. TO CROSS LAKE
7.9 MI EAST OF LA 169, Caddo, LA
Built 1994 Load: 35.6 t ADT: 1,100
PORT RD
GoodOver: TALLA BENA BAYOU
0.1 MI E of US 65, Madison, LA
Built 2003 Load: 35.6 t ADT: 500
E BEAR LAKE RD #4
GoodOver: BULL BAYOU
3.0 MI W of US 65, Madison, LA
Built 2003 Load: 35.6 t ADT: 125
Strekx Rd
GoodOver: Horseshoe Canal
0.54 MI. NORTH OF US 71, Rapides, LA
Built 1995 Load: 35.6 t ADT: 8,900
PINE GROVE DR
GoodOver: CANAL
0.2 MI. NORTH OF LA 107, Rapides, LA
Built 1998 Load: 35.6 t ADT: 6,700
US0171
GoodOver: MIDKIFF CREEK
0.33 MI. NORTH OF LA 474, Sabine, LA
Built 2004 Load: 35.6 t ADT: 2,726
US0171
GoodOver: MIDKIFF CREEK
0.98 MI. NORTH OF LA 474, Sabine, LA
Built 2004 Load: 35.6 t ADT: 2,726
US0167
GoodOver: KANSAS CITY SOUTHERN RR
3.29 MI. NORTH OF LA 500, Winn, LA
Built 2009 Load: 35.6 t ADT: 11,712
US0167
GoodOver: KANSAS CITY SOUTHERN RR
3.29 MI. NORTH OF LA 500, Winn, LA
Built 2009 Load: 35.6 t ADT: 5,107
Broussard Rd
GoodOver: WELSH GULLY
2.8 MI.E/NE I10 LA427 JCT, Ascension, LA
Built 2002 Load: 35.6 t ADT: 50
I0110
GoodOver: EVANGELINE ST. OFF RAMP
I0110, East Baton Rouge, LA
Built 1971 Load: 35.6 t ADT: 964
Antioch Rd
GoodOver: CLAY CUT BAYOU
3.1 MI NE JCT I-10 LA 42, East Baton Rouge, LA
Built 2003 Load: 35.6 t ADT: 5,730
Tom Dr
GoodOver: JONES CREEK
0.6 MI SE OF US 61, East Baton Rouge, LA
Built 2000 Load: 35.6 t
Spring St
GoodOver: DRAINAGE CREEK
0.3 M North of LA 10, East Feliciana, LA
Built 2008 Load: 35.6 t ADT: 44
Showing 8,901-8,950 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.