US Bridges

LA3083 over Bayou Alexandre

Good

St. Martin Parish, Louisiana · 3.9 Mi. E. of LA 679 · Structure no. 035000000030439

Built
2020
5 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
270 ft
5 main spans
Daily traffic
1,454
2019 count
Owner
State
State Highway Agency

About this bridge

LA3083 over Bayou Alexandre is a prestressed concrete continuous stringer/multi-beam or girder carrying LA3083 over Bayou Alexandre in St. Martin Parish, Louisiana. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,454 vehicles a day, roughly 5% of them trucks, projected to reach 1,599 by 2039. The structure is 270 ft (82.3 m) long and 35 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesLA3083
CrossesBayou Alexandre
Location3.9 Mi. E. of LA 679
RouteState Highway 3083
CountySt. Martin Parish
StateLouisiana
Coordinates30.14728, -91.68022
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadGreater than HL 93
Structure length270 ft (82.3 m)
Longest span54 ft (16.5 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,454 (2019)
Projected traffic1,599 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 LA3083 over Bayou Alexandre built?

It was built in 2020, making it 5 years old in 2025.

What condition is LA3083 over Bayou Alexandre 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 June 2023.

How much traffic does LA3083 over Bayou Alexandre carry?

About 1,454 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is LA3083 over Bayou Alexandre?

The structure is 270 ft (82.3 m) long with a longest span of 54 ft (16.5 m) and a deck 35 ft wide.

Who owns LA3083 over Bayou Alexandre?

It is owned by the State Highway Agency.