US Bridges

LA0077 over Bayou Maringouin

Fair

Iberville Parish, Louisiana · 0.01 M NE of LA 76 · Structure no. 612402190306451

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Culvert
Steel
Length
37 ft
2 main spans
Daily traffic
4,376
2021 count
Owner
State
State Highway Agency

About this bridge

LA0077 over Bayou Maringouin is a steel culvert carrying LA0077 over Bayou Maringouin in Iberville Parish, Louisiana. It was built in 1964, so it is 61 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 4,376 vehicles a day, roughly 10% of them trucks, projected to reach 4,813 by 2041. The structure is 37 ft (11.3 m) long and 64 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLA0077
CrossesBayou Maringouin
Location0.01 M NE of LA 76
RouteState Highway 77
CountyIberville Parish
StateLouisiana
Coordinates30.48913, -91.52276
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
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 length37 ft (11.3 m)
Longest span16 ft (4.9 m)
Deck width64 ft (19.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,376 (2021)
Projected traffic4,813 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0077 over Bayou Maringouin built?

It was built in 1964, making it 61 years old in 2025.

What condition is LA0077 over Bayou Maringouin 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 July 2023.

How much traffic does LA0077 over Bayou Maringouin carry?

About 4,376 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0077 over Bayou Maringouin?

The structure is 37 ft (11.3 m) long with a longest span of 16 ft (4.9 m) and a deck 64 ft wide.

Who owns LA0077 over Bayou Maringouin?

It is owned by the State Highway Agency.