US Bridges

LA0792 over Blacklake Bayou

Fair

Bienville Parish, Louisiana · 2.96 MI N of LA 4 · Structure no. 040702930102961

Built
2000
25 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
640 ft
16 main spans
Daily traffic
473
2021 count
Owner
State
State Highway Agency

About this bridge

LA0792 over Blacklake Bayou is a concrete slab carrying LA0792 over Blacklake Bayou in Bienville Parish, Louisiana. It was built in 2000, so it is 25 years old, younger 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 6 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 473 vehicles a day, roughly 19% of them trucks, projected to reach 520 by 2041. The structure is 640 ft (195.1 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesLA0792
CrossesBlacklake Bayou
Location2.96 MI N of LA 4
RouteState Highway 792
CountyBienville Parish
StateLouisiana
Coordinates32.29645, -93.1878
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans16
Design loadHS 20
Structure length640 ft (195.1 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic473 (2021)
Projected traffic520 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0792 over Blacklake Bayou built?

It was built in 2000, making it 25 years old in 2025.

What condition is LA0792 over Blacklake Bayou 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 April 2024.

How much traffic does LA0792 over Blacklake Bayou carry?

About 473 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0792 over Blacklake Bayou?

The structure is 640 ft (195.1 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns LA0792 over Blacklake Bayou?

It is owned by the State Highway Agency.