Total bridges
337
Public highway bridges in Ouachita County
County profile · official public datasets
Ouachita County, LA
337 public highway bridges tracked in the FHWA National Bridge Inventory: 27.9% rated Good, 59.3% Fair, 12.8% Poor.
- 337
- Public bridges
- 27.9%
- Good condition
- 12.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Ouachita County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 40th
- of 64 on Poor share
- 12.8%
- Poor-condition share
- 337
- 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.
Ouachita County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Ouachita County ranks #40 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.8%). Ouachita County, Louisiana contains 337 public highway bridges. Roughly 27.9% are rated “Good,” 59.3% “Fair,” and 12.8% “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
27.9%
94 of 337 rated 7-9
Fair condition
59.3%
200 of 337 rated 5-6
Poor condition
12.8%
43 of 337 rated 4 or below
In-state Poor-share rank
#40 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 337 NBI-tracked bridges by lowest applicable component rating.
Good 27.9% (94)
Fair 59.3% (200)
Poor 12.8% (43)
Ouachita County's Poor-condition bridges carry 186,531 vehicle crossings a day
That is 5.8% of the county's reported daily bridge traffic on 12.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 4,441 crossings a day against 3,906 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 333 of 337 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
44.5% of Ouachita County's bridges have passed the 50-year mark
150 of the 337 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 27.9% 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 21.6% of the county's Poor-condition bridge traffic
ORANGE ST over I-20, built 1965, carries 40,300 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 43-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 186,531 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Ouachita County's bridges were built
337 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 23
1950–1959
23 bridges
- 1960s
1960–1969
105 bridges
- 1970s
1970–1979
45 bridges
- 1980s
1980–1989
42 bridges
- 1990s 40
1990–1999
40 bridges
- 2000s 23
2000–2009
23 bridges
- 2010s
2010–2019
47 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1960s, when 105 of the county's bridges still in the inventory were built, which is 31.2% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1981) matches the Louisiana average (1982).
How Ouachita County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Ouachita County in number of bridges, with their condition splits. Its 12.8% Poor share is the 5th-lowest of these 6. Its average build year of 1981 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 |
|---|---|---|---|---|---|
| St. Tammany County | 360 | 33.3% | 60.6% | 6.1% | 1976 |
| Vernon County | 341 | 57.8% | 34.6% | 7.6% | 1989 |
| Ouachita County (this page) | 337 | 27.9% | 59.3% | 12.8% | 1981 |
| Lafayette County | 322 | 44.7% | 47.5% | 7.8% | 1986 |
| St. Landry County | 317 | 43.2% | 49.2% | 7.6% | 1980 |
| Natchitoches County | 313 | 46% | 38.7% | 15.3% | 1983 |
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 Ouachita 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 Ouachita County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (337 bridges here).
- Placer County, CA · 337 bridges
- Tama County, IA · 337 bridges
- Cowley County, KS · 337 bridges
- Windham County, VT · 337 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 (337)
SOUTH 5TH ST
FairOver: YOUNGS BAYOU DRAIN CANAL
.19 MI. SO INT. HWY., Ouachita, LA
Built 1975 Load: 25.9 t ADT: 50
BRITTON RD
FairOver: NORTH CHENIERE CREEK
0.4 MI. SOUTH OF I-20, Ouachita, LA
Built 1980 Load: 26.2 t ADT: 387
LA0594
FairOver: YOUNGS BAYOU
.6 MI EAST OF I-20, Ouachita, LA
Built 1965 Load: 26.3 t ADT: 8,579
PURDY RD
FairOver: I-20
1.4 MI WEST OF LA 151, Ouachita, LA
Built 1960 Load: 26.6 t ADT: 3,620
MILLER RD
FairOver: PETTICOAT BAYOU
LOG MILE 0.35 RT. 318, Ouachita, LA
Built 1981 Load: 26.6 t ADT: 330
CROWELL RD
FairOver: BROWN CREEK
1.1 MI. SOUTH of LA 34, Ouachita, LA
Built 1983 Load: 26.6 t ADT: 188
I0020
FairOver: YOUNGS BAYOU
.7 MI EAST OF LA 594, Ouachita, LA
Built 1965 Load: 26.9 t ADT: 15,642
LA0546
FairOver: CLARKS CREEK
1.2 MI NORTH OF LA 151, Ouachita, LA
Built 1953 Load: 27.2 t ADT: 2,010
RICHLAND PLACE
FairOver: BAYOU DESIARD
0.2 MI. E. HWY. 165, Ouachita, LA
Built 1978 Load: 27.2 t ADT: 100
WINNFIELD RD
FairOver: WILDERS CREEK
3 MILES NE OF CADEVILLE, Ouachita, LA
Built 1994 Load: 28.2 t ADT: 197
I0020
FairOver: US165 NB RAMP FROM I20 W
I-20/US 165 INTERCHANGE, Ouachita, LA
Built 1966 Load: 28.5 t ADT: 15,642
ANTIOCH CHURCH RD
FairOver: SOUTH CHENIERE CR
0.5 MI SOUTH of LA 34, Ouachita, LA
Built 1982 Load: 28.5 t ADT: 344
LA0546
FairOver: WILDERS CREEK
2.8 MI NORTH OF LA 151, Ouachita, LA
Built 1953 Load: 29.0 t ADT: 2,706
OLD NATCHITOCHES
FairOver: BLACK BAYOU
0.4 MI SW of I-20, Ouachita, LA
Built 1997 Load: 29.2 t ADT: 300
OLD DARBONNE RD
FairOver: N TUPAWEK BAYOU
1.0 MI N of LA 616, Ouachita, LA
Built 1999 Load: 29.2 t ADT: 448
I0020
FairOver: I-20 RAMP D FROM US165 S
I-20/US 165 INTERCHANGE, Ouachita, LA
Built 1966 Load: 29.5 t ADT: 31,285
LA0002
FairOver: OUACHITA STERLINGTON
.68 MILES NORTH OF CALDWE, Ouachita, LA
Built 2009 Load: 29.8 t ADT: 6,258
WASHINGTON ST
FairOver: DRAINAGE CANAL
WASHINGTON ST. MONRO, Ouachita, LA
Built 1971 Load: 29.8 t ADT: 2,000
LA3280
FairOver: OUACHITA RIVER
LA 3280 OVER OUACHITA RIV, Ouachita, LA
Built 2003 Load: 29.9 t ADT: 8,312
LA0616
FairOver: South Tupawek Bayou
1.2 Mi W. of LA 143, Ouachita, LA
Built 2019 Load: 30.1 t ADT: 10,181
LA0034
FairOver: CREEK
5.48 MI EAST OF LA 546, Ouachita, LA
Built 1967 Load: 30.1 t ADT: 15,742
CENTURY LINK DR
FairOver: DESIARD BAYOU
AT LA FISH HATCHERY, Ouachita, LA
Built 1975 Load: 30.5 t ADT: 265
LEE GATES RD
FairOver: LAPINE BAYOU
0.75 MILES SOUTH OF LA 34, Ouachita, LA
Built 2011 Load: 30.7 t ADT: 57
LA0546
FairOver: INTG I-20
LA 546 OVER I-20, Ouachita, LA
Built 2008 Load: 30.8 t ADT: 7,892
I0020
FairOver: I-20 OVER US 165
I-20 OVER US 165, Ouachita, LA
Built 1965 Load: 30.8 t ADT: 66,061
GARRETT RD
FairOver: I-20
1.7 MI EAST OF US 165, Ouachita, LA
Built 1968 Load: 30.8 t ADT: 3,950
CENTRAL ST
FairOver: BLACK BAYOU
WEST MONROE, Ouachita, LA
Built 1982 Load: 30.8 t ADT: 250
DESIARD ST
FairOver: YOUNGS BAYOU
DESIARD ST. MONROE L, Ouachita, LA
Built 1961 Load: 30.8 t ADT: 10,000
PARKWOOD DR
FairOver: BLACK BAYOU
WEST MONROE, Ouachita, LA
Built 1980 Load: 31.1 t ADT: 300
PHILPET RD
FairOver: LAPINE CREEK
4.24 MI E of LA 557, Ouachita, LA
Built 1993 Load: 31.4 t ADT: 715
NUTLAND RD
FairOver: I-20
.5 MI EAST OF US 165, Ouachita, LA
Built 1968 Load: 31.8 t ADT: 7,400
STUBBS-RITCHIE RD
FairOver: DRAIN TO LITTLE BY.BOEUF
2.6 MI. N. HWY. 80, Ouachita, LA
Built 1980 Load: 31.8 t ADT: 90
US0080
FairOver: CURRY CREEK
.1 MI WEST OF I-20, Ouachita, LA
Built 1960 Load: 32.4 t ADT: 3,275
US0165
FairOver: CANAL
.5 MI NORTH OF LA 840-6, Ouachita, LA
Built 1975 Load: 32.4 t ADT: 29,759
LA0546
FairOver: GUYTON CREEK
.68 MI NORTH OF LA 34, Ouachita, LA
Built 1926 Load: 32.4 t ADT: 1,350
LA0594
FairOver: YOUNGS BAYOU
.2 MI EAST OF I-20, Ouachita, LA
Built 1922 Load: 32.4 t ADT: 8,579
LA0594
FairOver: CANAL
2.51 MI E of LA 15, Ouachita, LA
Built 1987 Load: 32.4 t ADT: 8,579
LA0594
FairOver: CANAL
2.92 MI E of LA 15, Ouachita, LA
Built 1987 Load: 32.4 t ADT: 8,579
LA5941
FairOver: BENNET BAYOU
6.59 MI E of LA 15, Ouachita, LA
Built 1998 Load: 32.4 t ADT: 8,579
I0020
FairOver: CURRY CREEK
.4 MI WEST OF LA 151, Ouachita, LA
Built 1960 Load: 32.4 t ADT: 40,857
I0020
FairOver: CREEK
1.9 MI EAST OF LA 151, Ouachita, LA
Built 1960 Load: 32.4 t ADT: 40,857
I0020
FairOver: BROWNLEE CREEK
.8 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: CREEK
.8 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: PATRICK CREEK
3.1 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: CREEK
3.1 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: CREEK
4.4 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: CREEK
4.4 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 32.4 t ADT: 40,857
I0020
FairOver: STEEP BAYOU
1.6 MI EAST OF LA 546, Ouachita, LA
Built 1963 Load: 32.4 t ADT: 61,935
I0020
FairOver: E YOUNGS BAYOU
.3 MI EAST OF US 165, Ouachita, LA
Built 1965 Load: 32.4 t ADT: 84,225
I0020
FairOver: GOURD BAYOU
7.1 MI EAST OF US 165, Ouachita, LA
Built 1968 Load: 32.4 t ADT: 43,420
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.