US Bridges

LA0433 over Salt Bayou

Good

St. Tammany Parish, Louisiana · 2.27 Mi. N. of US 90 · Structure no. 625200000620033

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
200 ft
8 main spans
Daily traffic
4,240
2021 count
Owner
State
State Highway Agency

About this bridge

LA0433 over Salt Bayou is a concrete slab carrying LA0433 over Salt Bayou in St. Tammany Parish, Louisiana. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,240 vehicles a day, roughly 15% of them trucks, projected to reach 4,664 by 2041. The structure is 200 ft (61 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLA0433
CrossesSalt Bayou
Location2.27 Mi. N. of US 90
RouteState Highway 433
CountySt. Tammany Parish
StateLouisiana
Coordinates30.19559, -89.7548
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadGreater than HL 93
Structure length200 ft (61 m)
Longest span25 ft (7.6 m)
Deck width36 ft (10.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,240 (2021)
Projected traffic4,664 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 LA0433 over Salt Bayou built?

It was built in 2019, making it 6 years old in 2025.

What condition is LA0433 over Salt Bayou 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 LA0433 over Salt Bayou carry?

About 4,240 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0433 over Salt Bayou?

The structure is 200 ft (61 m) long with a longest span of 25 ft (7.6 m) and a deck 36 ft wide.

Who owns LA0433 over Salt Bayou?

It is owned by the State Highway Agency.