US Bridges

Liberty ST Bridge over Bayou Terrebonne

Good

Terrebonne Parish, Louisiana · 0.2 MI E of LA 182 · Structure no. 025500000020426

Built
1994
31 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
14,700
2015 count
Owner
State
State Highway Agency

About this bridge

Liberty ST Bridge over Bayou Terrebonne is a concrete slab carrying Liberty ST Bridge over Bayou Terrebonne in Terrebonne Parish, Louisiana. It was built in 1994, so it is 31 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 14,700 vehicles a day, projected to reach 16,170 by 2035. The structure is 120 ft (36.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLiberty ST Bridge
CrossesBayou Terrebonne
Location0.2 MI E of LA 182
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.59909, -90.71282
Functional classUrban Local

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 protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width40 ft (12.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic14,700 (2015)
Projected traffic16,170 by 2035
Trucks—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$585,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Liberty ST Bridge over Bayou Terrebonne built?

It was built in 1994, making it 31 years old in 2025.

What condition is Liberty ST Bridge 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 April 2024.

How much traffic does Liberty ST Bridge over Bayou Terrebonne carry?

About 14,700 vehicles per day (2015 count).

How long is Liberty ST Bridge over Bayou Terrebonne?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 40 ft wide.

Who owns Liberty ST Bridge over Bayou Terrebonne?

It is owned by the State Highway Agency.