US Bridges

LA0648 over Bayou Lafourche

Fair

Lafourche Parish, Louisiana · 0.01 M West of LA 308 · Structure no. 022908292901601

Built
1991
34 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
200 ft
10 main spans
Daily traffic
9,183
2021 count
Owner
State
State Highway Agency

About this bridge

LA0648 over Bayou Lafourche is a concrete slab carrying LA0648 over Bayou Lafourche in Lafourche Parish, Louisiana. It was built in 1991, so it is 34 years old, younger 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 9,183 vehicles a day, roughly 11% of them trucks, projected to reach 10,101 by 2041. The structure is 200 ft (61 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0648
CrossesBayou Lafourche
Location0.01 M West of LA 308
RouteState Highway 648
CountyLafourche Parish
StateLouisiana
Coordinates29.79002, -90.7892
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length200 ft (61 m)
Longest span20 ft (6.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,183 (2021)
Projected traffic10,101 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 LA0648 over Bayou Lafourche built?

It was built in 1991, making it 34 years old in 2025.

What condition is LA0648 over Bayou Lafourche 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 January 2023.

How much traffic does LA0648 over Bayou Lafourche carry?

About 9,183 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0648 over Bayou Lafourche?

The structure is 200 ft (61 m) long with a longest span of 20 ft (6.1 m) and a deck 34 ft wide.

Who owns LA0648 over Bayou Lafourche?

It is owned by the State Highway Agency.