US Bridges

LA0058 over Bayou Terrebonne

FairPosted for load

Terrebonne Parish, Louisiana · 1.58 MI East of LA 56 · Structure no. 025502473001581

Built
1964
61 years old
Condition
Fair
inspected March 2024
Type
Movable - Lift
Steel
Length
156 ft
1 main span
Daily traffic
5,194
2021 count
Owner
State
State Highway Agency

About this bridge

LA0058 over Bayou Terrebonne is a steel movable - lift carrying LA0058 over Bayou Terrebonne in Terrebonne Parish, Louisiana. It was built in 1964, so it is 61 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. Its operating status is: posted for load restriction.

It carries about 5,194 vehicles a day, roughly 13% of them trucks, projected to reach 5,713 by 2041. The structure is 156 ft (47.5 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesLA0058
CrossesBayou Terrebonne
Location1.58 MI East of LA 56
RouteState Highway 58
CountyTerrebonne Parish
StateLouisiana
Coordinates29.48192, -90.5553
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28.9 US tons
Inventory rating22.2 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadH 15
Structure length156 ft (47.5 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck14 ft (4.2 m)

Traffic and service

Average daily traffic5,194 (2021)
Projected traffic5,713 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$724,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0058 over Bayou Terrebonne built?

It was built in 1964, making it 61 years old in 2025.

What condition is LA0058 over Bayou Terrebonne 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 March 2024.

How much traffic does LA0058 over Bayou Terrebonne carry?

About 5,194 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0058 over Bayou Terrebonne?

The structure is 156 ft (47.5 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns LA0058 over Bayou Terrebonne?

It is owned by the State Highway Agency.