US Bridges

LA0565 over Whites Bayou

Good

Concordia Parish, Louisiana · 4.23 MI East of LA 129 · Structure no. 581508151704231

Built
1973
52 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
4 main spans
Daily traffic
801
2021 count
Owner
State
State Highway Agency

About this bridge

LA0565 over Whites Bayou is a prestressed concrete stringer/multi-beam or girder carrying LA0565 over Whites Bayou in Concordia Parish, Louisiana. It was built in 1973, so it is 52 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 801 vehicles a day, roughly 21% of them trucks, projected to reach 881 by 2041. The structure is 200 ft (61 m) long and 30 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesLA0565
CrossesWhites Bayou
Location4.23 MI East of LA 129
RouteState Highway 565
Coordinates31.44091, -91.6438
Functional classRural Major 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length200 ft (61 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic801 (2021)
Projected traffic881 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 LA0565 over Whites Bayou built?

It was built in 1973, making it 52 years old in 2025.

What condition is LA0565 over Whites 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 May 2024.

How much traffic does LA0565 over Whites Bayou carry?

About 801 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0565 over Whites Bayou?

The structure is 200 ft (61 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns LA0565 over Whites Bayou?

It is owned by the State Highway Agency.