US Bridges

LA0433 over Bayou Liberty

Good

St. Tammany Parish, Louisiana · 2.48 Miles South US 190 · Structure no. 625200000620260

Built
2010
15 years old
Condition
Good
inspected October 2023
Type
Movable - Swing
Steel
Length
369 ft
14 main spans
Daily traffic
9,174
2021 count
Owner
State
State Highway Agency

About this bridge

LA0433 over Bayou Liberty is a steel movable - swing carrying LA0433 over Bayou Liberty in St. Tammany Parish, Louisiana. It was built in 2010, so it is 15 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 9,174 vehicles a day, roughly 8% of them trucks, projected to reach 10,091 by 2041. The structure is 369 ft (112.5 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLA0433
CrossesBayou Liberty
Location2.48 Miles South US 190
RouteState Highway 433
CountySt. Tammany Parish
StateLouisiana
Coordinates30.26873, -89.8444
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length369 ft (112.5 m)
Longest span129 ft (39.3 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deck19 ft (5.7 m)

Traffic and service

Average daily traffic9,174 (2021)
Projected traffic10,091 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 LA0433 over Bayou Liberty built?

It was built in 2010, making it 15 years old in 2025.

What condition is LA0433 over Bayou Liberty 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 Bayou Liberty carry?

About 9,174 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is LA0433 over Bayou Liberty?

The structure is 369 ft (112.5 m) long with a longest span of 129 ft (39.3 m) and a deck 34 ft wide.

Who owns LA0433 over Bayou Liberty?

It is owned by the State Highway Agency.