US Bridges

LA0024 over Bayou Terrebonne

Good

Terrebonne Parish, Louisiana · 1.45 Mi. S. of LA 660 · Structure no. 025500000020318

Built
1998
27 years old
Condition
Good
inspected May 2024
Type
Culvert
Steel
Length
28 ft
3 main spans
Daily traffic
22,400
2021 count
Owner
State
State Highway Agency

About this bridge

LA0024 over Bayou Terrebonne is a steel culvert carrying LA0024 over Bayou Terrebonne in Terrebonne Parish, Louisiana. It was built in 1998, so it is 27 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 22,400 vehicles a day, roughly 10% of them trucks, projected to reach 24,640 by 2041. The structure is 28 ft (8.5 m) long and 172 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLA0024
CrossesBayou Terrebonne
Location1.45 Mi. S. of LA 660
RouteState Highway 24
Coordinates29.63558, -90.7592
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span7 ft (2.1 m)
Deck width172 ft (52.4 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,400 (2021)
Projected traffic24,640 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

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 LA0024 over Bayou Terrebonne built?

It was built in 1998, making it 27 years old in 2025.

What condition is LA0024 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 May 2024.

How much traffic does LA0024 over Bayou Terrebonne carry?

About 22,400 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0024 over Bayou Terrebonne?

The structure is 28 ft (8.5 m) long with a longest span of 7 ft (2.1 m) and a deck 172 ft wide.

Who owns LA0024 over Bayou Terrebonne?

It is owned by the State Highway Agency.