US Bridges

LA 22 W Causeway over W Cswy Ov Chinchub Bayou

Good

St. Tammany Parish, Louisiana · 1.6 MI S LA 22 W Causeway · Structure no. 625230223900632

Built
1954
71 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete
Length
126 ft
3 main spans
Daily traffic
8,000
1995 count
Owner
Toll Authority
Local Toll Authority

About this bridge

LA 22 W Causeway over W Cswy Ov Chinchub Bayou is a concrete tee beam carrying LA 22 W Causeway over W Cswy Ov Chinchub Bayou in St. Tammany Parish, Louisiana. It was built in 1954, so it is 71 years old, older 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 8,000 vehicles a day, projected to reach 8,800 by 2015. The structure is 126 ft (38.4 m) long and 34 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

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CarriesLA 22 W Causeway
CrossesW Cswy Ov Chinchub Bayou
Location1.6 MI S LA 22 W Causeway
RouteCity Street 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.37947, -90.09391
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span42 ft (12.8 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (1995)
Projected traffic8,800 by 2015
Trucks—
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a toll road
National Highway SystemNo

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$424,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA 22 W Causeway over W Cswy Ov Chinchub Bayou built?

It was built in 1954, making it 71 years old in 2025.

What condition is LA 22 W Causeway over W Cswy Ov Chinchub 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 2024.

How much traffic does LA 22 W Causeway over W Cswy Ov Chinchub Bayou carry?

About 8,000 vehicles per day (1995 count).

How long is LA 22 W Causeway over W Cswy Ov Chinchub Bayou?

The structure is 126 ft (38.4 m) long with a longest span of 42 ft (12.8 m) and a deck 34 ft wide.

Who owns LA 22 W Causeway over W Cswy Ov Chinchub Bayou?

It is owned by the Local Toll Authority.