US Bridges

US0090 over LA308 B.Lafourche LA1

Good

Lafourche Parish, Louisiana · 10.5 MI West of LA 632 · Structure no. 022904240811202

Built
1976
49 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,331 ft
3 main spans
Daily traffic
14,300
2016 count
Owner
State
State Highway Agency

About this bridge

US0090 over LA308 B.Lafourche LA1 is a steel continuous stringer/multi-beam or girder carrying US0090 over LA308 B.Lafourche LA1 in Lafourche Parish, Louisiana. It was built in 1976, so it is 49 years old, older 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 14,300 vehicles a day, roughly 18% of them trucks, projected to reach 15,730 by 2036. The structure is 3,331 ft (1,015.3 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesUS0090
CrossesLA308 B.Lafourche LA1
Location10.5 MI West of LA 632
RouteU.S. Route 90
CountyLafourche Parish
StateLouisiana
Coordinates29.71282, -90.5677
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+52 approach)
Design loadHS 20
Structure length3,331 ft (1,015.3 m)
Longest span155 ft (47.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,300 (2016)
Projected traffic15,730 by 2036
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed—
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US0090 over LA308 B.Lafourche LA1 built?

It was built in 1976, making it 49 years old in 2025.

What condition is US0090 over LA308 B.Lafourche LA1 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 October 2023.

How much traffic does US0090 over LA308 B.Lafourche LA1 carry?

About 14,300 vehicles per day (2016 count), of which roughly 18% are trucks.

How long is US0090 over LA308 B.Lafourche LA1?

The structure is 3,331 ft (1,015.3 m) long with a longest span of 155 ft (47.2 m) and a deck 43 ft wide.

Who owns US0090 over LA308 B.Lafourche LA1?

It is owned by the State Highway Agency.