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.
Fair-condition bridges (200)
LA0838
FairOver: CHENIERE CREEK
4.1 MI EAST OF LA 546, Ouachita, LA
Built 1955 Load: 8.0 t ADT: 8,105
TACK ALLEN RD
FairOver: DRAIN TO CYPRESS CREEK
1.1 MI. E. HWY. 557, Ouachita, LA
Built 1975 Load: 10.0 t ADT: 30
OLIVE ST
FairOver: W. PRONG YOUNGS BAYOU
OLIVE ST. - MONROE LA, Ouachita, LA
Built 1985 Load: 11.7 t ADT: 300
NORTH 18TH ST
FairOver: KCS&UNION PACIFIC R/R
0.6 MI NW of I-20, Ouachita, LA
Built 2002 Load: 13.3 t ADT: 19,250
BREARD ST
FairOver: W PRONG YOUNGS BAYOU
BREARD ST MONROE, Ouachita, LA
Built 1970 Load: 13.3 t ADT: 300
BAYOU OAKS DR
FairOver: PATRICKS CANAL
4 MI NE MONROE, Ouachita, LA
Built 1981 Load: 13.3 t ADT: 1,200
LAPINE RD
FairOver: ROGERS CREEK
6 MI NW LUNA, Ouachita, LA
Built 1960 Load: 13.6 t ADT: 118
LA0557
FairOver: PRAIRION BAYOU
5.06 MI SOUTH OF LA 34, Ouachita, LA
Built 1964 Load: 13.9 t ADT: 1,073
PINE ST
FairOver: PINE ST.AND TENTH ST.INT
INT. OF PINE AND TEN, Ouachita, LA
Built 1970 Load: 14.3 t ADT: 1,000
GRAMMONT ST
FairOver: W PRONG YOUNGS BAYOU
GRAMMONT ST IN MONRO, Ouachita, LA
Built 1970 Load: 14.9 t ADT: 250
WESTLAKE DR
FairOver: BARTHOLOMEW BAYOU
ENTRANCE TO SUBDIVIS, Ouachita, LA
Built 1968 Load: 15.2 t ADT: 1,443
NORTHEAST DR
FairOver: DESIARD BAYOU
NORTHEAST LA UNIVERS, Ouachita, LA
Built 1966 Load: 15.9 t ADT: 500
GATLEY ST
FairOver: BLACK BAYOU
IN WEST MONROE, Ouachita, LA
Built 1975 Load: 17.1 t ADT: 300
US0080
FairOver: OUACHITA RIVER-LOUISVILL
1.6 MI WEST OF LA 840-6, Ouachita, LA
Built 1936 Load: 18.8 t ADT: 17,683
LOUBERTA ST
FairOver: YOUNGS BAYOU
LOUBERTA STREET, Ouachita, LA
Built 1993 Load: 18.8 t ADT: 300
HARRELL RD
FairOver: STEEP BAYOU
1 MILE NORTH OF HWY 80, Ouachita, LA
Built 2013 Load: 19.3 t ADT: 731
CYPRESS SCHOOL RD
FairOver: CYPRESS CREEK
4 MI S OKALOOSA, Ouachita, LA
Built 1979 Load: 19.3 t ADT: 235
GOOD HOPE RD
FairOver: N TUPAWEK BAYOU
3 MI NW WEST MONROE, Ouachita, LA
Built 1978 Load: 19.3 t ADT: 3,947
BRITTON RD
FairOver: I-20
1.0 MI EAST OF US 80, Ouachita, LA
Built 1964 Load: 19.4 t ADT: 3,770
LA0015
FairOver: BAYOU
4.4 MI EAST OF LA 841, Ouachita, LA
Built 1954 Load: 20.0 t ADT: 2,382
LA0015
FairOver: BLACK STEEP BAYOU
3.8 MI EAST OF LA 841, Ouachita, LA
Built 1954 Load: 20.0 t ADT: 2,382
LA0015
FairOver: BAYOU
1.5 MI WEST OF LA 841, Ouachita, LA
Built 1951 Load: 20.0 t ADT: 5,994
LA0151
FairOver: CREEK
5.68 MI NORTH OF LA 546, Ouachita, LA
Built 1958 Load: 20.0 t ADT: 2,828
LA0151
FairOver: COCKEREL CREEK
1.1 MI NORTH OF NORTH INT, Ouachita, LA
Built 1967 Load: 20.0 t ADT: 2,862
WASHINGTON ST
FairOver: YOUNGS BAYOU
WASHINGTON ST. MONRO, Ouachita, LA
Built 1961 Load: 20.1 t ADT: 2,000
LA0838
FairOver: CREEK
4.2 MI EAST OF LA 546, Ouachita, LA
Built 1955 Load: 20.4 t ADT: 8,105
CYPRESS SCHOOL RD
FairOver: CYPRESS CANAL
2 MI W LUNA, Ouachita, LA
Built 1979 Load: 20.4 t ADT: 235
US0080
FairOver: WEST RELIEF
3.6 MI EAST OF LA 594, Ouachita, LA
Built 1955 Load: 20.9 t ADT: 2,747
MARVIN HEAD RD
FairOver: SOUTH PRONG PRARION BAYO
U MI. E. HWY. 557, Ouachita, LA
Built 1970 Load: 20.9 t ADT: 228
LINCOLN HILLS DR
FairOver: CANEY CREEK
0.31 MI. E. INT. HWY, Ouachita, LA
Built 1979 Load: 21.1 t ADT: 150
LA0143
FairOver: CROSS BAYOU
5.9 MI NORTH OF LA 616, Ouachita, LA
Built 1952 Load: 21.4 t ADT: 3,674
JOE DEATS RD
FairOver: PEDDICOAT BAYOU
0.7 Mi. EAST of LA 841, Ouachita, LA
Built 2006 Load: 21.6 t ADT: 80
SWARTZ SCHOOL RD
FairOver: CONEY CREEK
0.3 MI. E. of LA 139, Ouachita, LA
Built 1979 Load: 21.7 t ADT: 1,330
US0080
FairOver: BROWNLEE CREEK
.6 MI EAST OF I-20, Ouachita, LA
Built 1951 Load: 21.8 t ADT: 3,275
US0080
FairOver: PATRICK CREEK
2.7 MI EAST OF I-20, Ouachita, LA
Built 1951 Load: 21.8 t ADT: 3,275
I0020
FairOver: CITY ST/ICG RR/OUACHITA
16.84 MI E LINCOLN PAR LN, Ouachita, LA
Built 1965 Load: 22.4 t ADT: 66,061
LA3249
FairOver: I-20
3.2 MI EAST OF LA 546, Ouachita, LA
Built 1963 Load: 22.7 t ADT: 21,250
REDWOOD DR
FairOver: HARRISON CREEK
NORTHSIDE OF MONROE, Ouachita, LA
Built 1962 Load: 22.7 t ADT: 750
CAMP RD
FairOver: N CHENIERE CREEK
AT INT LA HWY 546, Ouachita, LA
Built 1979 Load: 23.3 t ADT: 160
BREARD ST
FairOver: YOUNGS BAYOU
BREARD ST. MONROE LA, Ouachita, LA
Built 1961 Load: 23.3 t ADT: 1,500
I0020
FairOver: CITY ST/ICG RR/OUACHITA
16.84 MI E LINCOLN PAR LN, Ouachita, LA
Built 1965 Load: 23.7 t ADT: 84,225
DESIARD ST
FairOver: DRAINAGE CANAL
DESIARD ST. MONROE L, Ouachita, LA
Built 1961 Load: 23.7 t ADT: 10,000
GUYTON RD
FairOver: DRAIN TO CHENIERE BRAKE
0.7 MI. W. HWY. 3033, Ouachita, LA
Built 1979 Load: 23.9 t ADT: 37
US0165
FairOver: LA 594&ICRR
US 165 OVER I-20, Ouachita, LA
Built 1966 Load: 24.3 t ADT: 29,759
DEAN CHAPEL RD
FairOver: SOUTH TUPAWEK CREEK
0.25 MILES SOUTH OF LA 61, Ouachita, LA
Built 2011 Load: 25.3 t ADT: 3,100
LA0151
FairOver: CREEK
1.22 MI NORTH OF LA 546, Ouachita, LA
Built 1958 Load: 25.4 t ADT: 2,828
LA0151
FairOver: CREEK
1.87 MI NORTH OF LA 546, Ouachita, LA
Built 1958 Load: 25.4 t ADT: 2,828
LA0838
FairOver: CREEK
5.21 MI EAST OF LA 546, Ouachita, LA
Built 1955 Load: 25.4 t ADT: 8,105
RED CUT RD
FairOver: WATSON BRANCH
MI E HWY 557, Ouachita, LA
Built 1981 Load: 25.6 t ADT: 270
SOUTH 6TH ST
FairOver: YOUNGS BAYOU DRAIN CANAL
.11 MI. SO. INT. HWY, Ouachita, LA
Built 1975 Load: 25.9 t ADT: 500
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.