US Bridges

LA0355 over Bayou Teche

Fair

St. Martin Parish, Louisiana · 0.16 MI W of LA 347 · Structure no. 035000560500161

Built
1949
76 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
176 ft
1 main span
Daily traffic
4,721
2021 count
Owner
State
State Highway Agency

About this bridge

LA0355 over Bayou Teche is a steel stringer/multi-beam or girder carrying LA0355 over Bayou Teche in St. Martin Parish, Louisiana. It was built in 1949, so it is 76 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 4,721 vehicles a day, roughly 9% of them trucks, projected to reach 5,193 by 2041. The structure is 176 ft (53.6 m) long and 30 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesLA0355
CrossesBayou Teche
Location0.16 MI W of LA 347
RouteState Highway 355
CountySt. Martin Parish
StateLouisiana
Coordinates30.33615, -91.8554
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length176 ft (53.6 m)
Longest span51 ft (15.5 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,721 (2021)
Projected traffic5,193 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$802,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0355 over Bayou Teche built?

It was built in 1949, making it 76 years old in 2025.

What condition is LA0355 over Bayou Teche 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 March 2023.

How much traffic does LA0355 over Bayou Teche carry?

About 4,721 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0355 over Bayou Teche?

The structure is 176 ft (53.6 m) long with a longest span of 51 ft (15.5 m) and a deck 30 ft wide.

Who owns LA0355 over Bayou Teche?

It is owned by the State Highway Agency.