US Bridges

LA0034 over Bayou Black

Fair

Ouachita Parish, Louisiana · 6.39 MI East of LA 546 · Structure no. 053700670906391

Built
1953
72 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
153 ft
5 main spans
Daily traffic
17,751
2021 count
Owner
State
State Highway Agency

About this bridge

LA0034 over Bayou Black is a concrete tee beam carrying LA0034 over Bayou Black in Ouachita Parish, Louisiana. It was built in 1953, so it is 72 years old, older 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 5 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 17,751 vehicles a day, roughly 9% of them trucks, projected to reach 19,526 by 2041. The structure is 153 ft (46.6 m) long and 70 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0034
CrossesBayou Black
Location6.39 MI East of LA 546
RouteState Highway 34
CountyOuachita Parish
StateLouisiana
Coordinates32.4872, -92.1459
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86 US tons
Inventory rating51 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span30 ft (9.1 m)
Deck width70 ft (21.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,751 (2021)
Projected traffic19,526 by 2041
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$855,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0034 over Bayou Black built?

It was built in 1953, making it 72 years old in 2025.

What condition is LA0034 over Bayou Black 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 August 2024.

How much traffic does LA0034 over Bayou Black carry?

About 17,751 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0034 over Bayou Black?

The structure is 153 ft (46.6 m) long with a longest span of 30 ft (9.1 m) and a deck 70 ft wide.

Who owns LA0034 over Bayou Black?

It is owned by the State Highway Agency.