US Bridges

LA0351 over Bayou Teche

Good

St. Martin Parish, Louisiana · 0.1 MI W of 321 · Structure no. 035004003004821

Built
1993
32 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
345 ft
15 main spans
Daily traffic
3,526
2021 count
Owner
State
State Highway Agency

About this bridge

LA0351 over Bayou Teche is a prestressed concrete stringer/multi-beam or girder carrying LA0351 over Bayou Teche in St. Martin Parish, Louisiana. It was built in 1993, so it is 32 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,526 vehicles a day, roughly 9% of them trucks, projected to reach 3,878 by 2041. The structure is 345 ft (105.2 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesLA0351
CrossesBayou Teche
Location0.1 MI W of 321
RouteState Highway 351
Coordinates30.23721, -91.8775
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20
Structure length345 ft (105.2 m)
Longest span65 ft (19.8 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,526 (2021)
Projected traffic3,878 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 LA0351 over Bayou Teche built?

It was built in 1993, making it 32 years old in 2025.

What condition is LA0351 over Bayou Teche in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does LA0351 over Bayou Teche carry?

About 3,526 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0351 over Bayou Teche?

The structure is 345 ft (105.2 m) long with a longest span of 65 ft (19.8 m) and a deck 35 ft wide.

Who owns LA0351 over Bayou Teche?

It is owned by the State Highway Agency.