US Bridges

LA0178 over Bayou Bourbeaux

Fair

St. Landry Parish, Louisiana · 0.45 MI W of LA 182 · Structure no. 034902083003671

Built
1963
62 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
44 ft
2 main spans
Daily traffic
1,619
2021 count
Owner
State
State Highway Agency

About this bridge

LA0178 over Bayou Bourbeaux is a steel culvert carrying LA0178 over Bayou Bourbeaux in St. Landry Parish, Louisiana. It was built in 1963, so it is 62 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,619 vehicles a day, roughly 13% of them trucks, projected to reach 1,780 by 2041. The structure is 44 ft (13.4 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0178
CrossesBayou Bourbeaux
Location0.45 MI W of LA 182
RouteState Highway 178
CountySt. Landry Parish
StateLouisiana
Coordinates30.42938, -92.1067
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span15 ft (4.6 m)
Deck width53 ft (16.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,619 (2021)
Projected traffic1,780 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$321,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0178 over Bayou Bourbeaux built?

It was built in 1963, making it 62 years old in 2025.

What condition is LA0178 over Bayou Bourbeaux in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does LA0178 over Bayou Bourbeaux carry?

About 1,619 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0178 over Bayou Bourbeaux?

The structure is 44 ft (13.4 m) long with a longest span of 15 ft (4.6 m) and a deck 53 ft wide.

Who owns LA0178 over Bayou Bourbeaux?

It is owned by the State Highway Agency.