US Bridges

LA0346 over Rambin Bayou

Fair

De Soto Parish, Louisiana · 6.05 MI East of LA 175 · Structure no. 041603010306051

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
275
2021 count
Owner
State
State Highway Agency

About this bridge

LA0346 over Rambin Bayou is a concrete slab carrying LA0346 over Rambin Bayou in De Soto Parish, Louisiana. It was built in 1962, so it is 63 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 275 vehicles a day, roughly 25% of them trucks, projected to reach 302 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLA0346
CrossesRambin Bayou
Location6.05 MI East of LA 175
RouteState Highway 346
CountyDe Soto Parish
StateLouisiana
Coordinates31.91707, -93.4757
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2021)
Projected traffic302 by 2041
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 LA0346 over Rambin Bayou built?

It was built in 1962, making it 63 years old in 2025.

What condition is LA0346 over Rambin 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 May 2024.

How much traffic does LA0346 over Rambin Bayou carry?

About 275 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is LA0346 over Rambin Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0346 over Rambin Bayou?

It is owned by the State Highway Agency.