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.
Fair-condition bridges (58)
St. Charles Bypass
FairOver: GRAND COTEAU BAYOU
0148 LOG MI FROM INT, Lafourche, LA
Built 1970 Load: 5.2 t ADT: 1,193
GALLIANO BRIDGE RD
FairOver: LAFOURCHE BAYOU
0.01 MI W. OF LA 308, Lafourche, LA
Built 1956 Load: 12.0 t ADT: 1,338
LA0020
FairOver: 40 ARPENT CANAL
3.2 MI NORTH OF LA 308, Lafourche, LA
Built 1968 Load: 13.0 t ADT: 20,091
OLD LA182 XOVER
FairOver: LAFOURCHE BAYOU
0.01 MI N. OF LA 1, Lafourche, LA
Built 1968 Load: 15.9 t ADT: 4,400
CANAL BLVD
FairOver: LAFOURCHE BAYOU
1 0003 LOG MI FROM I, Lafourche, LA
Built 1966 Load: 16.2 t ADT: 8,737
CANAL BLVD
FairOver: LAFOURCHE BAYOU
0003 LOG MI FROM INT, Lafourche, LA
Built 1966 Load: 16.2 t ADT: 8,110
LA3185
FairOver: DRAIN CANAL
2.3 MI WEST OF LA 3107, Lafourche, LA
Built 1969 Load: 16.5 t ADT: 12,957
LA0316
FairOver: ICWW / BAYOU BLUE
2.3 MI NORTH OF LA 24, Lafourche, LA
Built 1972 Load: 17.0 t ADT: 2,407
LA0020
FairOver: DRAINAGE CANAL
5.2 MI NORTH OF LA 308, Lafourche, LA
Built 1968 Load: 17.2 t ADT: 20,091
W. 79TH ST
FairOver: LAFOURCHE BAYOU
0.01 MI E. OF LA 1, Lafourche, LA
Built 1956 Load: 17.2 t ADT: 3,633
LA0182
FairOver: HOLLYWOOD CANAL
.68 MI EAST OF LA 316, Lafourche, LA
Built 1957 Load: 17.5 t ADT: 7,322
LA3185
FairOver: DRAIN CANAL
1.7 MI WEST OF LA 3107, Lafourche, LA
Built 1969 Load: 17.5 t ADT: 12,957
LA3185
FairOver: DRAIN CANAL
2.0 MI WEST OF LA 3107, Lafourche, LA
Built 1969 Load: 17.5 t ADT: 12,957
LA3185
FairOver: DRAIN CANAL
1.0 MI WEST OF LA 3107, Lafourche, LA
Built 1969 Load: 17.8 t ADT: 12,957
Bayou Folse Rd
FairOver: COULEE
0083 LOG MI FROM INT, Lafourche, LA
Built 1965 Load: 19.1 t ADT: 212
E. 28TH ST
FairOver: BAYOU LAFOURCHE
0.01M EAST OF LA 1, Lafourche, LA
Built 1993 Load: 19.8 t ADT: 5,637
LA0182
FairOver: 40 ARPENT CANAL
.01 MI WEST OF LA 652, Lafourche, LA
Built 1952 Load: 20.0 t ADT: 7,322
US0090
FairOver: US 90 OVER LA 316
US 90 OVER LA 316, Lafourche, LA
Built 1980 Load: 20.4 t ADT: 11,400
BARRIOS STREET
FairOver: FORTY ARPENT CANAL
0.3 MI W. OF LA 1, Lafourche, LA
Built 1969 Load: 20.4 t ADT: 706
LA0308-S
FairOver: BAYOU LAFOURCHE
.01 MI EAST OF LA 1, Lafourche, LA
Built 1972 Load: 21.1 t ADT: 9,051
LA0001
FairOver: INTRACOASTAL CANL
.05 MI NORTH OF LA 24, Lafourche, LA
Built 1961 Load: 21.4 t ADT: 3,276
LA0020
FairOver: BAYOU LAFOURCHE
.01 MI WEST OF LA 308, Lafourche, LA
Built 1967 Load: 24.5 t ADT: 7,822
LA3235
FairOver: WETLANDS
S OF LEEVILLE TO JCT LA1, Lafourche, LA
Built 2012 Load: 25.6 t ADT: 3,305
LA0182
FairOver: BAYOU LAFOURCHE
.01 MI EAST OF LA 1, Lafourche, LA
Built 1936 Load: 27.2 t ADT: 5,783
E. MAIN ST
FairOver: YANKEE BAYOU
0.06 MI SE OF LA 308, Lafourche, LA
Built 1971 Load: 28.2 t ADT: 152
E. MAIN ST
FairOver: YANKEE BAYOU
0.06 MI S. OF LA 308, Lafourche, LA
Built 1971 Load: 28.2 t ADT: 152
Bowie Rd
FairOver: COULEE
0065 LOG MI FROM INT, Lafourche, LA
Built 1972 Load: 28.8 t ADT: 4,080
US0090
FairOver: DRAINAGE CANAL
2.17 MI EAST OF LA 316, Lafourche, LA
Built 1982 Load: 29.5 t ADT: 13,535
Bayou Blue Bypass
FairOver: HOLLYWOOD CANAL
0096 LOG MI FROM INT, Lafourche, LA
Built 1976 Load: 31.1 t ADT: 2,019
US0090
FairOver: US 90 OVER LA 316
US 90 OVER LA 316, Lafourche, LA
Built 1980 Load: 31.8 t ADT: 14,769
LA0652
FairOver: 40 ARPENT CANAL
0.3 MILES EAST OF LA 182, Lafourche, LA
Built 2009 Load: 32.4 t ADT: 1,867
LA0308
FairOver: DRAINAGE CANAL
4.8 MI N OF LA 657, Lafourche, LA
Built 2011 Load: 32.7 t ADT: 12,186
LA0307
FairOver: BAYOU BOEUF
9.2 MI NORTH OF LA 182, Lafourche, LA
Built 1976 Load: 32.7 t ADT: 2,271
US0090
FairOver: BAYOU FOLSE & CANAL
2.2 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 33.6 t ADT: 14,769
US0090
FairOver: BAYOU FOLSE & CANAL
2.2 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 33.6 t ADT: 13,535
LA3220
FairOver: BAYOU LAFOURCHE
.01 MI EAST OF LA 1, Lafourche, LA
Built 1986 Load: 33.6 t ADT: 3,859
Audubon Ave
FairOver: LAFOURCHE BAYOU
00.01 LOG MI. FROM LA 308, Lafourche, LA
Built 1986 Load: 35.6 t ADT: 7,219
LA0024
FairOver: ST. LOUIS BAYOU
10.6 MI WEST OF LA 1, Lafourche, LA
Built 1975 Load: 37.2 t ADT: 5,271
LA0307
FairOver: BAYOU ROND POMPON
14.5 MI NORTH OF LA 182, Lafourche, LA
Built 1976 Load: 39.0 t ADT: 2,271
LA0304
FairOver: BAYOU LONION
5.72 MI NORTH OF LA 308, Lafourche, LA
Built 1980 Load: 39.9 t ADT: 1,518
LA0648
FairOver: BAYOU LAFOURCHE
0.01 M WEST OF LA 308, Lafourche, LA
Built 1991 Load: 39.9 t ADT: 9,183
LA0024
FairOver: BAYOU BLUE
2.2 MI WEST OF LA 1, Lafourche, LA
Built 1979 Load: 42.6 t ADT: 5,271
US0090
FairOver: MC MAHON CANAL
.7 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 14,769
US0090
FairOver: MC MAHON CANAL
.7 MI EAST OF LA 182, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 13,535
US0090
FairOver: B.CUTOFF
1.4 MI WEST OF LA 1, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 14,769
US0090
FairOver: B.CUTOFF
1.4 MI WEST OF LA 1, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 13,535
US0090
FairOver: DRAINAGE CANAL
2.7 MI EAST OF LA 1, Lafourche, LA
Built 1976 Load: 42.6 t ADT: 27,665
LA0308
FairOver: COMPANY CANAL
.5 MI SOUTH OF LA 655, Lafourche, LA
Built 1974 Load: 43.5 t ADT: 12,187
US0090
FairOver: DRAINAGE CANAL
.85 MI EAST OF LA 316, Lafourche, LA
Built 1982 Load: 43.5 t ADT: 14,769
US0090
FairOver: DRAINAGE CANAL
.85 MI EAST OF LA 316, Lafourche, LA
Built 1982 Load: 43.5 t ADT: 13,535
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.