Total bridges
130
Public highway bridges in Lafourche County
County profile · official public datasets
Lafourche County, LA
130 public highway bridges tracked in the FHWA National Bridge Inventory: 39.2% rated Good, 44.6% Fair, 16.2% Poor.
- 130
- Public bridges
- 39.2%
- Good condition
- 16.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lafourche County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 50th
- of 64 on Poor share
- 16.2%
- Poor-condition share
- 130
- public highway bridges
- 1981
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Lafourche County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lafourche County ranks #50 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 16.2%). Lafourche County, Louisiana contains 130 public highway bridges. Roughly 39.2% are rated “Good,” 44.6% “Fair,” and 16.2% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
39.2%
51 of 130 rated 7-9
Fair condition
44.6%
58 of 130 rated 5-6
Poor condition
16.2%
21 of 130 rated 4 or below
In-state Poor-share rank
#50 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 130 NBI-tracked bridges by lowest applicable component rating.
Good 39.2% (51)
Fair 44.6% (58)
Poor 16.2% (21)
Lafourche County's Poor-condition bridges carry 104,113 vehicle crossings a day
That is 11.6% of the county's reported daily bridge traffic on 14.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 5,480 crossings a day against 6,764 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 128 of 130 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
33.1% of Lafourche County's bridges have passed the 50-year mark
43 of the 130 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 39.2% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 19.3% of the county's Poor-condition bridge traffic
LA0020 over DRAINAGE CANAL, built 1968, carries 20,091 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 21-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 104,113 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lafourche County's bridges were built
130 bridges with a recorded construction year, grouped by decade
- 1930s 1
1930–1939
1 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 9
1950–1959
9 bridges
- 1960s
1960–1969
22 bridges
- 1970s
1970–1979
31 bridges
- 1980s
1980–1989
29 bridges
- 1990s
1990–1999
16 bridges
- 2000s 10
2000–2009
10 bridges
- 2010s 11
2010–2019
11 bridges
What this shows Construction peaked in the 1970s, when 31 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1981) matches the Louisiana average (1982).
How Lafourche County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Lafourche County in number of bridges, with their condition splits. Its 16.2% Poor share is the 5th-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1982 is in line with the group.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Morehouse County | 136 | 33.8% | 52.9% | 13.2% | 1983 |
| East Feliciana County | 133 | 32.3% | 42.1% | 25.6% | 1980 |
| Franklin County | 131 | 64.9% | 32.1% | 3.1% | 1989 |
| Lafourche County (this page) | 130 | 39.2% | 44.6% | 16.2% | 1981 |
| Caldwell County | 124 | 57.3% | 34.7% | 8.1% | 1982 |
| St. Mary County | 124 | 31.5% | 62.1% | 6.5% | 1975 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Lafourche County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Lafourche County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (130 bridges here).
- Kit Carson County, CO · 130 bridges
- Bay County, FL · 130 bridges
- Lowndes County, GA · 130 bridges
- Whitfield County, GA · 130 bridges
Similar average build year
Nearest mean year-built outside LA (1981 here).
- Franklin County, OH · avg 1981 · 922 bridges
- Greenville County, SC · avg 1981 · 635 bridges
- Montgomery County, OH · avg 1981 · 632 bridges
- McLean County, IL · avg 1981 · 624 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (130)
US0090
FairOver: DRAINAGE CANAL
2.17 MI EAST OF LA 316, Lafourche, LA
Built 1982 Load: 43.5 t ADT: 14,769
US0090
FairOver: CUTOFF BAYOU
1.4 MI WEST OF LA 1, Lafourche, LA
Built 1984 Load: 43.5 t ADT: 189
LA0653
FairOver: DRAINAGE CANAL
4.25 MI EAST OF LA 182, Lafourche, LA
Built 2000 Load: 44.5 t ADT: 124
LA0653
FairOver: LA 653 OVER US 90
LA 653 OVER US 90, Lafourche, LA
Built 1980 Load: 48.1 t ADT: 800
LA0308
FairOver: L VALLEY CANAL
0.4M EAST OF LA 648, Lafourche, LA
Built 1992 Load: 57.2 t ADT: 5,050
LEBOUEF LN
FairOver: BAYOU POINTE AU CHENE
2.65 MI FROM LA 55, Lafourche, LA
Built 1987 Load: 63.5 t ADT: 66
EMILY ST
FairOver: BAYOU POINT AU CHENE
2.55 MI FROM LA 55, Lafourche, LA
Built 1987 Load: 73.2 t ADT: 92
LA3235
FairOver: DRAIN CANAL
2.8 MILES NORTH OF BAYOU, Lafourche, LA
Built 1985 Load: 74.5 t ADT: 6,255
LA0001
GoodOver: MARSH
LA 1 1.5 MILES NORTH OF B, Lafourche, LA
Built 2009 Load: 20.7 t ADT: 3,305
OAKPOINT RD
GoodOver: BAYOU POINTE AU CHENE
0.01 M WEST OF LA 665, Lafourche, LA
Built 1989 Load: 21.7 t ADT: 497
Choctaw Rd
GoodOver: ST JAMES CANAL
04.69 MI FROM INT. 191, Lafourche, LA
Built 1997 Load: 22.0 t ADT: 961
LA0001
GoodOver: BAYOU LAFOURCHE
LA 1 OVER BAYOU LAFOURCHE, Lafourche, LA
Built 2009 Load: 22.7 t ADT: 3,305
AIRPORT RD
GoodOver: CANAL
1.18 MI E. JSC. LA308, Lafourche, LA
Built 1983 Load: 22.7 t ADT: 788
LA0020
GoodOver: DRAINAGE CANAL
4.24 MI NORTH OF LA 308, Lafourche, LA
Built 1968 Load: 24.5 t ADT: 20,091
LA0657
GoodOver: BAYOU LAFOURCHE
LA 657 BETWEEN LA 1 AND L, Lafourche, LA
Built 2013 Load: 24.6 t ADT: 443
LA0020
GoodOver: GRAND BAYOU
07.62 MILES NORTH OF LA 3, Lafourche, LA
Built 2012 Load: 25.3 t ADT: 8,298
HWY 645 Local
GoodOver: BAYOU BOUDREAUX
2.3M NW OF LA 1, Lafourche, LA
Built 1993 Load: 25.3 t ADT: 198
LA0654
GoodOver: BAYOU LAFOURCHE
.01 MI EAST OF LA 1, Lafourche, LA
Built 2003 Load: 26.6 t ADT: 1,791
Laural Valley Rd
GoodOver: CANAL
3.4M NE OF LA 308, Lafourche, LA
Built 1993 Load: 27.9 t ADT: 1,401
US0090
GoodOver: LA 182 / Drainage Canal
US 90 EB OVER LA 182, Lafourche, LA
Built 1980 Load: 29.9 t ADT: 14,769
US0090
GoodOver: LA 182 / Drainage Canal
US 90 WB OVER LA 182, Lafourche, LA
Built 1980 Load: 29.9 t ADT: 13,535
ST JOHN BRIDGE
GoodOver: BAYOU LAFOURCHE
0.01 MI S. OF LA 308, Lafourche, LA
Built 2006 Load: 31.4 t ADT: 2,824
Choctaw Rd
GoodOver: LEGENDRE CANAL
0.85 M WEST OF LA 20, Lafourche, LA
Built 1991 Load: 31.4 t ADT: 1,206
LA0652
GoodOver: US 90
LA 652 OVER US 90, Lafourche, LA
Built 1980 Load: 34.5 t ADT: 1,867
LA0182
GoodOver: DRAIN CANAL
.7 MILES EAST OF LA 308, Lafourche, LA
Built 2011 Load: 35.0 t ADT: 5,783
BURMA RD
GoodOver: HOLLYWOOD CANAL
1.0 MI. SOUTH OF LA 1, Lafourche, LA
Built 2012 Load: 35.3 t ADT: 1,643
Laurel Valley Rd
GoodOver: DRAIN CANAL
0.8 Mi. W. of Choctaw Rd, Lafourche, LA
Built 2001 Load: 35.3 t ADT: 1,406
LA0024
GoodOver: PIPELINE CROSSING
2.1 MI WEST OF LA 1, Lafourche, LA
Built 1979 Load: 35.4 t ADT: 5,271
LA0308
GoodOver: LA657-ICWW-STR@LAROSE
.5 MI NORTH OF LA 1, Lafourche, LA
Built 1975 Load: 36.3 t ADT: 12,186
LA0649
GoodOver: BAYOU LAFOURCHE
.01 MI NORTH OF LA 1, Lafourche, LA
Built 1996 Load: 36.3 t ADT: 1,991
Lydia St
GoodOver: HOLLYWOOD CANAL
0.48 M FROM INT 250, Lafourche, LA
Built 1991 Load: 36.6 t ADT: 131
T-BOIS BRIDGE RD
GoodOver: BAYOU LAFOURCHE
0.01 N. of LA 1, Lafourche, LA
Built 2007 Load: 36.6 t ADT: 1,928
US0090
GoodOver: LA1 B.LAFOURCHE LA 308
4.5 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 38.1 t ADT: 14,300
US0090
GoodOver: LA308 B.LAFOURCHE LA1
10.5 MI WEST OF LA 632, Lafourche, LA
Built 1976 Load: 38.1 t ADT: 14,300
US0090
GoodOver: ON RAMP FROM LA1
.08 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 38.1 t ADT: 12,192
US0090
GoodOver: OFF RAMP TO LA1
.08 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 38.1 t ADT: 12,192
US0090
GoodOver: ON RAMP H
.4 MI EAST OF LA 182, Lafourche, LA
Built 1980 Load: 39.0 t ADT: 12,192
ALARIO BRIDGE RD
GoodOver: DRAIN CANAL
0.3 MILE SW OF LA 3235, Lafourche, LA
Built 2011 Load: 39.9 t ADT: 530
LA3185
GoodOver: BAYOU LAFOURCHE
0.01M WEST OF LA 308, Lafourche, LA
Built 1991 Load: 39.9 t ADT: 12,957
LA0182
GoodOver: MCMAHON CANAL
.7 MI EAST OF US 90, Lafourche, LA
Built 1981 Load: 40.8 t ADT: 7,322
LA0182
GoodOver: BAYOU FOLSE
.01 MI EAST OF LA 653, Lafourche, LA
Built 1981 Load: 40.8 t ADT: 7,322
US0090
GoodOver: FOLSE BAYOU
2.2 MI EAST OF LA 182, Lafourche, LA
Built 1984 Load: 40.8 t ADT: 189
US0090
GoodOver: ON RAMP FROM LA308
.4 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 40.8 t ADT: 26,058
US0090
GoodOver: OFF RAMP TO LA308
.4 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 40.8 t ADT: 12,192
US0090
GoodOver: OFF RAMP I
.2 MI EAST OF LA 182, Lafourche, LA
Built 1980 Load: 41.7 t ADT: 12,192
CHOCTAW RD
GoodOver: LEPINE CANAL
P2929510904391, Lafourche, LA
Built 2002 Load: 41.8 t ADT: 1,435
LA0308
GoodOver: THERIOT CANAL
2.6 M N OF LA 3198, Lafourche, LA
Built 1991 Load: 42.6 t ADT: 5,050
US0090
GoodOver: DRAINAGE CANAL
2.7 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 27,665
Tiger Dr
GoodOver: BAYOU LAFOURCHE
0.1 MI. E. OF LA 1, Lafourche, LA
Built 2015 Load: 43.1 t ADT: 6,806
LA0001
GoodOver: THERIOT CANAL
3.3M N OF LA 3198, Lafourche, LA
Built 1991 Load: 43.5 t ADT: 8,897
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.