Total Bridges
12,699
Public highway bridges in Louisiana
State profile · Above national median SD
Louisiana bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Louisiana — drawn straight from the FHWA National Bridge Inventory.
- 12,699
- Public bridges
- 36.2%
- Good condition
- 11.0%
- Poor condition
- 11.0%
- Structurally deficient
Good Condition
36.2%
4,603 bridges rated 7-9
-13.8pp vs 50% benchmark
Poor Condition
11.0%
1,397 bridges rated 0-4
Structurally Deficient
11.0%
1,397 bridges flagged for repair priority
4.0pp vs national avg 7.0%
Louisiana vs national bridge condition
Louisiana — Good condition share 36.2%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Louisiana — Structurally deficient share 36.7%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — Louisiana (FHWA NBI)
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 323 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 on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Louisiana on the same metric.
42
Pennsylvania
10.50% top marginal rate
38
North Dakota
10.84% top marginal rate
22
Louisiana
11.00% top marginal rate
72
Puerto Rico
11.98% top marginal rate
23
Maine
13.23% top marginal rate
Bridges Needing Most Attention in Louisiana
Six lowest-condition bridges in Louisiana, ranked by composite NBI rating. Each is inspected at least every 24 months.
Layton Coco Xing
Structurally DeficientOver: BAYOU DES GLAISES
0.01 MI. EAST OF LA 451, Avoyelles, LA
Built 1986 Load: 0.9 t ADT: 40
LA1077
Structurally DeficientOver: BLACK BAYOU
1.1 M S OF LA 22, St. Tammany, LA
Built 1965 Load: 0.9 t ADT: 1,019
LA0308
Structurally DeficientOver: BAYOU LAFOURCHE
.01 MI NORTH OF LA 1, Lafourche, LA
Built 1970 Load: 1.0 t ADT: 5,198
Ebeneezer Tap Rd
PoorOver: JONES CREEK
0.65 Mi South of LA 500, LaSalle, LA
Built 1989 Load: 1.2 t ADT: 300
Anderson Rd
Structurally DeficientOver: HYDE BR.
2 MI S OF 1054 & 440, Tangipahoa, LA
Built 1960 Load: 1.2 t ADT: 25
Stubblefield Rd
PoorOver: BAYOU ROUGE
APPROX. 1 M. S. OF LA 361, Avoyelles, LA
Built 1975 Load: 2.3 t ADT: 40
All Bridges in Louisiana
Sulphur Springs Rd
GoodOver: HORSEPEN Cr
0.9 MI N OF LA.127, LaSalle, LA
Built 2016 Load: 46.0 t ADT: 412
Vesta Lane
GoodOver: SALEM CREEK
LOG MILE 0.34 FROM 380 TO, LaSalle, LA
Built 2007 Load: 46.0 t ADT: 100
LA 120
GoodOver: Bayou Provencal
1.77 MI E of 117, Natchitoches, LA
Built 2020 Load: 46.0 t ADT: 665
LA0120
GoodOver: Creek
5.2 Mi E of LA 487, Natchitoches, LA
Built 2021 Load: 46.0 t ADT: 1,946
LA0120
GoodOver: Sand Creek
1.35 Mi E of LA 478, Natchitoches, LA
Built 2022 Load: 46.0 t ADT: 665
CLARK ROAD
GoodOver: B. BOURBEAUX
0.8 M N OF US 84, Natchitoches, LA
Built 2020 Load: 46.0 t ADT: 602
LA3033
GoodOver: CREEK
3.06 MILES NORTH OF LA 34, Ouachita, LA
Built 2014 Load: 46.0 t ADT: 5,669
ELM ST
GoodOver: AIRPORT CANAL
0.9 MI E OF US 165, Ouachita, LA
Built 2016 Load: 46.0 t ADT: 850
LA 135
GoodOver: MUDDY BAYOU
1.7 MI. N. OF LA 576, Richland, LA
Built 2020 Load: 46.0 t ADT: 698
MUMPHREY RD
GoodOver: 20 ARPENT CANAL
0.7 MI N OF LA 39, St. Bernard, LA
Built 2020 Load: 46.0 t ADT: 700
LA0052
GoodOver: BOUTTE CANAL
1 MILE NORTH OF HWY 90, St. Charles, LA
Built 1999 Load: 46.0 t ADT: 6,850
LEONARD CHAPEL RD
GoodOver: CREEK
.77 MI N. OF LA 40, St. Helena, LA
Built 2019 Load: 46.0 t ADT: 500
Williams Rd
GoodOver: Coffman Creek
0.2 Mi S of LA 16, St. Helena, LA
Built 2019 Load: 46.0 t ADT: 500
Gallow Rd.
GoodOver: Drainage Canal
0.5 Mi NE of Belleau Rd, St. Landry, LA
Built 2017 Load: 46.0 t ADT: 100
LA0121
GoodOver: MILL CREEK
4.3 MILES S.E. OF LA 489, Vernon, LA
Built 2016 Load: 46.0 t ADT: 1,932
LA0100
GoodOver: BAYOU POINTE AUX LOUPS
3.32 MI. EAST OF LA. 97, Acadia, LA
Built 1997 Load: 46.3 t ADT: 1,128
LA0095
GoodOver: BAYOU PLAQUEMINE
0.2 MI NORTH OF LA 35, Acadia, LA
Built 1993 Load: 46.3 t ADT: 1,664
LA1012
GoodOver: HIMALAYA CANAL
1.5 MILES SOUTH OF LA 101, Assumption, LA
Built 2014 Load: 46.3 t ADT: 96
US0090
GoodOver: DRAIN
0.2 MI E of LA 662, Assumption, LA
Built 2006 Load: 46.3 t ADT: 3,440
LA0182
GoodOver: BAYOU CAROLINE
0.7 Miles E of US90 Bus, Assumption, LA
Built 2006 Load: 46.3 t ADT: 3,905
LA0182
GoodOver: ALLIGATOR BAYOU
1.3 MI E of US 90 BUS, Assumption, LA
Built 2006 Load: 46.3 t ADT: 3,905
LA0182
GoodOver: ALLIGATOR BAYOU RELIEF
1.3 Miles W of LA 662, Assumption, LA
Built 2006 Load: 46.3 t ADT: 3,905
CARL HUNT RD
GoodOver: Bayou Beouf
0.25 M E of LA 1176, Avoyelles, LA
Built 2021 Load: 46.3 t ADT: 50
LA0516
GoodOver: BLACK LAKE BAYOU RELIEF
4.8 MI. E. OF LA 792, Bienville, LA
Built 2016 Load: 46.3 t ADT: 177
LA0516
GoodOver: BLACK LAKE BAYOU
4.5 MI. E. OF LA 792, Bienville, LA
Built 2016 Load: 46.3 t ADT: 177
LA0516
GoodOver: MADDEN MILL CREEK
2.41 MI. E. OF LA 792, Bienville, LA
Built 2017 Load: 46.3 t ADT: 177
LA0612
GoodOver: OLD CHANNEL OF RED CHUTE
2.34 MI. E. OF US 71, Bossier, LA
Built 2017 Load: 46.3 t ADT: 8,332
US0080
GoodOver: FIFI BAYOU
3.4 MI E OF I- 220, Bossier, LA
Built 2021 Load: 46.3 t ADT: 15,627
US0080
GoodOver: FIFI BAYOU
4.2 MI W OF LA 614, Bossier, LA
Built 2021 Load: 46.3 t ADT: 2,376
LINTON ROAD
GoodOver: BLACK BAYOU RESERVOIR
1.6 MI E OF PALMETTO ROAD, Bossier, LA
Built 2022 Load: 46.3 t ADT: 4,650
Buncombe Rd
GoodOver: BOGGY BAYOU TRIB
1.7 MMI. E. OF LA 169 ON, Caddo, LA
Built 2015 Load: 46.3 t ADT: 100
JOE SPEARS RD
GoodOver: BAYOU
0.6 MI E of LA 397, Calcasieu, LA
Built 2019 Load: 46.3 t ADT: 307
JOHNNY BREAU RD
GoodOver: GOBBLER CREEK
1.2 MI W OF LA 108, Calcasieu, LA
Built 2019 Load: 46.3 t ADT: 46
MARCANTEL ROAD
GoodOver: BUXTON CREEK
0.3 MI N of ROUTE 66 ROAD, Calcasieu, LA
Built 2019 Load: 46.3 t ADT: 216
HOUSTON RIVER RD
GoodOver: Coon Gully
0.70 Mi W of LA 27, Calcasieu, LA
Built 2017 Load: 46.3 t ADT: 3,393
OLD HWY 90
GoodOver: WEBB GULLY
0.9 MI S of BROUSSARD RD, Calcasieu, LA
Built 2018 Load: 46.3 t ADT: 315
PARISH BARN RD
GoodOver: GULLY
0.02 MI N OF I-10 FRNTG, Calcasieu, LA
Built 2019 Load: 46.3 t ADT: 250
LA0109
GoodOver: GUM SLOUGH
2.7 MI N OF LA 3063, Calcasieu, LA
Built 1996 Load: 46.3 t ADT: 1,749
HESTER RD
GoodOver: PINEY CREEK
2.97 MILES S OF LA.126, Caldwell, LA
Built 2016 Load: 46.3 t ADT: 75
Amyx Gravel Pit Rd
GoodOver: SALEM CREEK
1.8 MI N of LA 772, Catahoula, LA
Built 2015 Load: 46.3 t ADT: 100
LA0124
GoodOver: HOOTER CREEK
2.9 MI E OF LA 126, Catahoula, LA
Built 2022 Load: 46.3 t ADT: 117
Flat Lick
GoodOver: FLAT LICK BAYOU
4.94 MI. S. OF LA ON FLAT, Claiborne, LA
Built 2016 Load: 46.3 t ADT: 50
DENHAM RD
GoodOver: BEAVER BAYOU
1.6 M W OF LA 37, East Baton Rouge, LA
Built 2019 Load: 46.3 t ADT: 4,616
TUCKER RD
GoodOver: DRAINAGE BAYOU
0.3 M N OF LA 64, East Baton Rouge, LA
Built 2019 Load: 46.3 t ADT: 1,723
DYER RD.
GoodOver: BLACKWATER BAYOU
2.5 MI E OF LA 67, East Baton Rouge, LA
Built 2019 Load: 46.3 t ADT: 2,000
LA0410
GoodOver: BLACK WATER BAYOU
5.2 MILES NORTH OF LA.408, East Baton Rouge, LA
Built 2016 Load: 46.3 t ADT: 3,664
New Rafe Mayer Rd
GoodOver: ASH SLOUGH
0.22 MI E OF LA.19, East Baton Rouge, LA
Built 2016 Load: 46.3 t ADT: 3,175
US0065
GoodOver: BAXTER BAYOU
3.1 MI NORTH OF LA 134, East Carroll, LA
Built 2003 Load: 46.3 t ADT: 4,507
LA3187
GoodOver: BOGGY BAYOU
1.5 Mi. West of LA 13., Evangeline, LA
Built 1992 Load: 46.3 t ADT: 295
LA0471
GoodOver: Dartigo Creek
5.8 Mi N of US 71, Grant, LA
Built 2021 Load: 46.3 t ADT: 510
Showing 10,751-10,800 of 12,699 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |