US Bridges

Galliano Bridge RD over Lafourche Bayou

FairPosted for load

Lafourche Parish, Louisiana · 0.01 MI W. of LA 308 · Structure no. 022929260901781

Built
1956
69 years old, rebuilt 2009
Condition
Fair
inspected July 2023
Type
Movable - Swing
Steel
Length
136 ft
1 main span
Daily traffic
1,338
2021 count
Owner
County
County Highway Agency

About this bridge

Galliano Bridge RD over Lafourche Bayou is a steel movable - swing carrying Galliano Bridge RD over Lafourche Bayou in Lafourche Parish, Louisiana. It was built in 1956 and reconstructed in 2009, so it is 69 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 5 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 1,338 vehicles a day, projected to reach 1,471 by 2041. The structure is 136 ft (41.5 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesGalliano Bridge RD
CrossesLafourche Bayou
Location0.01 MI W. of LA 308
RouteCounty Highway 0
CountyLafourche Parish
StateLouisiana
Coordinates29.43426, -90.29725
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckSteel plate
Main spans1 (+4 approach)
Design loadHS 15
Structure length136 ft (41.5 m)
Longest span72 ft (21.9 m)
Deck width36 ft (11 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic1,338 (2021)
Projected traffic1,471 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Galliano Bridge RD over Lafourche Bayou built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2009.

What condition is Galliano Bridge RD over Lafourche Bayou 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 July 2023.

How much traffic does Galliano Bridge RD over Lafourche Bayou carry?

About 1,338 vehicles per day (2021 count).

How long is Galliano Bridge RD over Lafourche Bayou?

The structure is 136 ft (41.5 m) long with a longest span of 72 ft (21.9 m) and a deck 36 ft wide.

Who owns Galliano Bridge RD over Lafourche Bayou?

It is owned by the County Highway Agency.