US Bridges

Bayou Gardens Blvd over St. Louis Bayou

Good

Terrebonne Parish, Louisiana · 1.2 MI NE of LA 660 · Structure no. 025500000020543

Built
2017
8 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
6,028
2023 count
Owner
County
County Highway Agency

About this bridge

Bayou Gardens Blvd over St. Louis Bayou is a concrete slab carrying Bayou Gardens Blvd over St. Louis Bayou in Terrebonne Parish, Louisiana. It was built in 2017, so it is 8 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 6,028 vehicles a day, projected to reach 6,630 by 2043. The structure is 140 ft (42.7 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesBayou Gardens Blvd
CrossesSt. Louis Bayou
Location1.2 MI NE of LA 660
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.66191, -90.71449
Functional classRural Local

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating60 US tons
Inventory rating45.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,028 (2023)
Projected traffic6,630 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Bayou Gardens Blvd over St. Louis Bayou built?

It was built in 2017, making it 8 years old in 2025.

What condition is Bayou Gardens Blvd over St. Louis Bayou 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 May 2023.

How much traffic does Bayou Gardens Blvd over St. Louis Bayou carry?

About 6,028 vehicles per day (2023 count).

How long is Bayou Gardens Blvd over St. Louis Bayou?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 37 ft wide.

Who owns Bayou Gardens Blvd over St. Louis Bayou?

It is owned by the County Highway Agency.