US Bridges

LA0408 over Bayou

Fair

East Baton Rouge Parish, Louisiana · 0.1 M E of I-110&LA 408 · Structure no. 611702550101901

Built
1976
49 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
113 ft
5 main spans
Daily traffic
26,976
2021 count
Owner
State
State Highway Agency

About this bridge

LA0408 over Bayou is a concrete slab carrying LA0408 over Bayou in East Baton Rouge 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 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 26,976 vehicles a day, roughly 9% of them trucks, projected to reach 29,673 by 2041. The structure is 113 ft (34.4 m) long and 84 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0408
CrossesBayou
Location0.1 M E of I-110&LA 408
RouteState Highway 408
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.52139, -91.1594
Functional classUrban Other Principal 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span27 ft (8.2 m)
Deck width84 ft (25.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,976 (2021)
Projected traffic29,673 by 2041
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 LA0408 over Bayou built?

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

What condition is LA0408 over Bayou 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 September 2024.

How much traffic does LA0408 over Bayou carry?

About 26,976 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0408 over Bayou?

The structure is 113 ft (34.4 m) long with a longest span of 27 ft (8.2 m) and a deck 84 ft wide.

Who owns LA0408 over Bayou?

It is owned by the State Highway Agency.