US Bridges

LA0001 over Bayou Thunder

Good

Lafourche Parish, Louisiana · 6.2 MI E of LA 3090 · Structure no. 022900000020528

Built
2019
6 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete
Length
180 ft
9 main spans
Daily traffic
3,305
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Bayou Thunder is a concrete slab carrying LA0001 over Bayou Thunder in Lafourche Parish, Louisiana. It was built in 2019, so it is 6 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 3,305 vehicles a day, roughly 15% of them trucks, projected to reach 3,635 by 2041. The structure is 180 ft (54.9 m) long and 48 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0001
CrossesBayou Thunder
Location6.2 MI E of LA 3090
RouteState Highway 1
CountyLafourche Parish
StateLouisiana
Coordinates29.19019, -90.08272
Functional classRural Minor Arterial

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 inspectionJuly 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadGreater than HL 93
Structure length180 ft (54.9 m)
Longest span20 ft (6.1 m)
Deck width48 ft (14.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,305 (2021)
Projected traffic3,635 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

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 LA0001 over Bayou Thunder built?

It was built in 2019, making it 6 years old in 2025.

What condition is LA0001 over Bayou Thunder 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 July 2023.

How much traffic does LA0001 over Bayou Thunder carry?

About 3,305 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0001 over Bayou Thunder?

The structure is 180 ft (54.9 m) long with a longest span of 20 ft (6.1 m) and a deck 48 ft wide.

Who owns LA0001 over Bayou Thunder?

It is owned by the State Highway Agency.