US Bridges

LA0655 over Isle Jean Charles Canal

Good

Terrebonne Parish, Louisiana · 8.51 MI S of LA 55 · Structure no. 025508550908511

Built
1988
37 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
2,337
2021 count
Owner
State
State Highway Agency

About this bridge

LA0655 over Isle Jean Charles Canal is a concrete slab carrying LA0655 over Isle Jean Charles Canal in Terrebonne Parish, Louisiana. It was built in 1988, so it is 37 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 2,337 vehicles a day, roughly 12% of them trucks, projected to reach 2,570 by 2041. The structure is 120 ft (36.6 m) long and 37 ft wide.

CarriesLA0655
CrossesIsle Jean Charles Canal
Location8.51 MI S of LA 55
RouteState Highway 655
Coordinates29.43373, -90.45907
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating40 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 width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,337 (2021)
Projected traffic2,570 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 LA0655 over Isle Jean Charles Canal built?

It was built in 1988, making it 37 years old in 2025.

What condition is LA0655 over Isle Jean Charles Canal 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 July 2024.

How much traffic does LA0655 over Isle Jean Charles Canal carry?

About 2,337 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0655 over Isle Jean Charles Canal?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 37 ft wide.

Who owns LA0655 over Isle Jean Charles Canal?

It is owned by the State Highway Agency.