US Bridges

LA0001 over Bayou Lafourche

Good

Lafourche Parish, Louisiana · LA 1 over Bayou Lafourche · Structure no. 022900000020415

Built
2009
16 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
10,216 ft
104 main spans
Daily traffic
3,305
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Bayou Lafourche is a steel stringer/multi-beam or girder carrying LA0001 over Bayou Lafourche in Lafourche Parish, Louisiana. It was built in 2009, so it is 16 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 3,305 vehicles a day, roughly 20% of them trucks, projected to reach 3,635 by 2041. The structure is 10,216 ft (3,113.8 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0001
CrossesBayou Lafourche
LocationLA 1 over Bayou Lafourche
RouteState Highway 1
CountyLafourche Parish
StateLouisiana
Coordinates29.23621, -90.1978
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 alignment7: Better than present minimum criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans104
Design loadHS 20
Structure length10,216 ft (3,113.8 m)
Longest span290 ft (88.4 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,305 (2021)
Projected traffic3,635 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollToll bridge
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0001 over Bayou Lafourche built?

It was built in 2009, making it 16 years old in 2025.

What condition is LA0001 over Bayou Lafourche 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 November 2023.

How much traffic does LA0001 over Bayou Lafourche carry?

About 3,305 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is LA0001 over Bayou Lafourche?

The structure is 10,216 ft (3,113.8 m) long with a longest span of 290 ft (88.4 m) and a deck 43 ft wide.

Who owns LA0001 over Bayou Lafourche?

It is owned by the State Highway Agency.