Total bridges
55
Public highway bridges in East Carroll County
County profile · official public datasets
East Carroll County, LA
55 public highway bridges tracked in the FHWA National Bridge Inventory: 29.1% rated Good, 50.9% Fair, 20% Poor.
- 55
- Public bridges
- 29.1%
- Good condition
- 20%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
East Carroll County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 56th
- of 64 on Poor share
- 20%
- Poor-condition share
- 55
- public highway bridges
- 1980
- 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.
East Carroll County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, East Carroll County ranks #56 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 20%). East Carroll County, Louisiana contains 55 public highway bridges. Roughly 29.1% are rated “Good,” 50.9% “Fair,” and 20% “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
29.1%
16 of 55 rated 7-9
Fair condition
50.9%
28 of 55 rated 5-6
Poor condition
20%
11 of 55 rated 4 or below
In-state Poor-share rank
#56 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 55 NBI-tracked bridges by lowest applicable component rating.
Good 29.1% (16)
Fair 50.9% (28)
Poor 20% (11)
East Carroll County's Poor-condition bridges carry 3,482 vehicle crossings a day
That is 10.9% of the county's reported daily bridge traffic on 17% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 387 crossings a day against 853 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 53 of 55 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
30.9% of East Carroll County's bridges have passed the 50-year mark
17 of the 55 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 29.1% 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 35.4% of the county's Poor-condition bridge traffic
LA0002 over BAYOU MACON, built 1959, carries 1,232 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 11-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,482 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When East Carroll County's bridges were built
55 bridges with a recorded construction year, grouped by decade
- 1930s 2
1930–1939
2 bridges
- 1950s
1950–1959
7 bridges
- 1960s 6
1960–1969
6 bridges
- 1970s
1970–1979
10 bridges
- 1980s
1980–1989
17 bridges
- 1990s 4
1990–1999
4 bridges
- 2000s
2000–2009
7 bridges
- 2010s 2
2010–2019
2 bridges
What this shows Construction peaked in the 1980s, when 17 of the county's bridges still in the inventory were built, which is 30.9% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1980) matches the Louisiana average (1982).
How East Carroll County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest East Carroll County in number of bridges, with their condition splits. Its 20% Poor share is the 3rd-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1983 is in line with the group.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Red River County | 63 | 22.2% | 47.6% | 30.2% | 1982 |
| Cameron County | 58 | 19% | 55.2% | 25.9% | 1985 |
| East Carroll County (this page) | 55 | 29.1% | 50.9% | 20% | 1980 |
| Tensas County | 52 | 57.7% | 38.5% | 3.8% | 1979 |
| Pointe Coupee County | 50 | 22% | 52% | 26% | 1970 |
| St. Bernard County | 47 | 55.3% | 38.3% | 6.4% | 1998 |
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 East Carroll 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 East Carroll County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (55 bridges here).
- Park County, CO · 55 bridges
- Dixie County, FL · 55 bridges
- Winnebago County, IA · 55 bridges
- Logan County, KS · 55 bridges
Similar average build year
Nearest mean year-built outside LA (1980 here).
- Tulsa County, OK · avg 1980 · 1,135 bridges
- Miami-Dade County, FL · avg 1980 · 1,057 bridges
- Pulaski County, AR · avg 1980 · 721 bridges
- McLennan County, TX · avg 1980 · 714 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (55)
Leggit Crossing
PoorOver: BAYOU MACON
1.9 Mi. E. of LA 588, East Carroll, LA
Built 1960 Load: 7.8 t ADT: 200
LONGWOOD RD
PoorOver: DRAIN
1.1 MI E of LA 596, East Carroll, LA
Built 1977 Load: 10.0 t
LA0579
PoorOver: COOKS SLOUGH
1.33 MI SOUTH OF LA 577, East Carroll, LA
Built 1961 Load: 15.9 t ADT: 119
LA0002
PoorOver: BAYOU MACON
6.99 MI WEST OF US 65, East Carroll, LA
Built 1959 Load: 20.1 t ADT: 1,232
LA0585
PoorOver: DRAINAGE CANAL
1.86 MI NORTH OF US 65, East Carroll, LA
Built 1977 Load: 24.6 t ADT: 372
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.