US Bridges

LA0657 over Bayou Lafourche

Good

Lafourche Parish, Louisiana · LA 657 Between LA 1 and L · Structure no. 022900000020502

Built
2013
12 years old
Condition
Good
inspected June 2023
Type
Movable - Lift
Steel
Length
290 ft
1 main span
Daily traffic
443
2021 count
Owner
State
State Highway Agency

About this bridge

LA0657 over Bayou Lafourche is a steel movable - lift carrying LA0657 over Bayou Lafourche in Lafourche Parish, Louisiana. It was built in 2013, so it is 12 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 443 vehicles a day, roughly 11% of them trucks, projected to reach 487 by 2041. The structure is 290 ft (88.4 m) long and 80 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0657
CrossesBayou Lafourche
LocationLA 657 Between LA 1 and L
RouteState Highway 657
CountyLafourche Parish
StateLouisiana
Coordinates29.56831, -90.37443
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadHS 20
Structure length290 ft (88.4 m)
Longest span122 ft (37.2 m)
Deck width80 ft (24.5 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deck19 ft (5.8 m)

Traffic and service

Average daily traffic443 (2021)
Projected traffic487 by 2041
Trucks11%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0657 over Bayou Lafourche built?

It was built in 2013, making it 12 years old in 2025.

What condition is LA0657 over Bayou Lafourche 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 June 2023.

How much traffic does LA0657 over Bayou Lafourche carry?

About 443 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0657 over Bayou Lafourche?

The structure is 290 ft (88.4 m) long with a longest span of 122 ft (37.2 m) and a deck 80 ft wide.

Who owns LA0657 over Bayou Lafourche?

It is owned by the State Highway Agency.