US Bridges

W. Dubuisson over Tributary to Liberty Bay

Fair

St. Tammany Parish, Louisiana · LA 433-E Reiley RD .93 MI · Structure no. 625230167894961

Built
1986
39 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
229
2022 count
Owner
County
County Highway Agency

About this bridge

W. Dubuisson over Tributary to Liberty Bay is a concrete slab carrying W. Dubuisson over Tributary to Liberty Bay in St. Tammany Parish, Louisiana. It was built in 1986, so it is 39 years old, younger 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 229 vehicles a day, projected to reach 251 by 2042. The structure is 57 ft (17.4 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesW. Dubuisson
CrossesTributary to Liberty Bay
LocationLA 433-E Reiley RD .93 MI
RouteCounty Highway 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.27905, -89.82809
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
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 rating52.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic229 (2022)
Projected traffic251 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was W. Dubuisson over Tributary to Liberty Bay built?

It was built in 1986, making it 39 years old in 2025.

What condition is W. Dubuisson over Tributary to Liberty Bay 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 January 2025.

How much traffic does W. Dubuisson over Tributary to Liberty Bay carry?

About 229 vehicles per day (2022 count).

How long is W. Dubuisson over Tributary to Liberty Bay?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns W. Dubuisson over Tributary to Liberty Bay?

It is owned by the County Highway Agency.