US Bridges

LA0664 over Bayou Terrebonne

Good

Terrebonne Parish, Louisiana · .01 Mile North of LA 24 · Structure no. 025500000020451

Built
2011
14 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
5,593
2021 count
Owner
State
State Highway Agency

About this bridge

LA0664 over Bayou Terrebonne is a concrete slab carrying LA0664 over Bayou Terrebonne in Terrebonne Parish, Louisiana. It was built in 2011, so it is 14 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 5,593 vehicles a day, roughly 11% of them trucks, projected to reach 6,152 by 2041. The structure is 80 ft (24.4 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA0664
CrossesBayou Terrebonne
Location.01 Mile North of LA 24
RouteState Highway 664
CountyTerrebonne Parish
StateLouisiana
Coordinates29.60128, -90.7369
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width41 ft (12.5 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,593 (2021)
Projected traffic6,152 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0664 over Bayou Terrebonne built?

It was built in 2011, making it 14 years old in 2025.

What condition is LA0664 over Bayou Terrebonne 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 LA0664 over Bayou Terrebonne carry?

About 5,593 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0664 over Bayou Terrebonne?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 41 ft wide.

Who owns LA0664 over Bayou Terrebonne?

It is owned by the State Highway Agency.