US Bridges

LA0024 over Intracoastal Waterway

Good

Terrebonne Parish, Louisiana · .03 MI East of US 90 · Structure no. 025508550400031

Built
1996
29 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,270 ft
3 main spans
Daily traffic
20,358
2021 count
Owner
State
State Highway Agency

About this bridge

LA0024 over Intracoastal Waterway is a steel continuous stringer/multi-beam or girder carrying LA0024 over Intracoastal Waterway in Terrebonne Parish, Louisiana. It was built in 1996, so it is 29 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 20,358 vehicles a day, roughly 10% of them trucks, projected to reach 22,393 by 2041. The structure is 3,270 ft (996.7 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA0024
CrossesIntracoastal Waterway
Location.03 MI East of US 90
RouteState Highway 659
CountyTerrebonne Parish
StateLouisiana
Coordinates29.5986, -90.7156
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+32 approach)
Design loadHS 20
Structure length3,270 ft (996.7 m)
Longest span220 ft (67.1 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,358 (2021)
Projected traffic22,393 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0024 over Intracoastal Waterway built?

It was built in 1996, making it 29 years old in 2025.

What condition is LA0024 over Intracoastal Waterway 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 October 2023.

How much traffic does LA0024 over Intracoastal Waterway carry?

About 20,358 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0024 over Intracoastal Waterway?

The structure is 3,270 ft (996.7 m) long with a longest span of 220 ft (67.1 m) and a deck 39 ft wide.

Who owns LA0024 over Intracoastal Waterway?

It is owned by the State Highway Agency.