US Bridges

LA0793 over Slough

Fair

Bienville Parish, Louisiana · .93 MI West of LA 794 · Structure no. 040702870501071

Built
1977
48 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
114 ft
6 main spans
Daily traffic
125
2021 count
Owner
State
State Highway Agency

About this bridge

LA0793 over Slough is a concrete slab carrying LA0793 over Slough in Bienville Parish, Louisiana. It was built in 1977, so it is 48 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 125 vehicles a day, roughly 25% of them trucks, projected to reach 137 by 2041. The structure is 114 ft (34.7 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesLA0793
CrossesSlough
Location.93 MI West of LA 794
RouteState Highway 793
CountyBienville Parish
StateLouisiana
Coordinates32.48369, -93.138
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2021)
Projected traffic137 by 2041
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 LA0793 over Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is LA0793 over Slough 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 LA0793 over Slough carry?

About 125 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is LA0793 over Slough?

The structure is 114 ft (34.7 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0793 over Slough?

It is owned by the State Highway Agency.