US Bridges

US0171 over Rambin Bayou

Fair

De Soto Parish, Louisiana · 1.5 Mi. S. of LA 5 · Structure no. 041600000017262

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
6,604
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over Rambin Bayou is a concrete slab carrying US0171 over Rambin Bayou in De Soto Parish, Louisiana. It was built in 1978, so it is 47 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 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 6,604 vehicles a day, roughly 18% of them trucks, projected to reach 7,264 by 2041. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesUS0171
CrossesRambin Bayou
Location1.5 Mi. S. of LA 5
RouteU.S. Route 171
CountyDe Soto Parish
StateLouisiana
Coordinates32.1719, -93.841
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span19 ft (5.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,604 (2021)
Projected traffic7,264 by 2041
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US0171 over Rambin Bayou built?

It was built in 1978, making it 47 years old in 2025.

What condition is US0171 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 US0171 over Rambin Bayou carry?

About 6,604 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is US0171 over Rambin Bayou?

The structure is 120 ft (36.6 m) long with a longest span of 19 ft (5.8 m) and a deck 43 ft wide.

Who owns US0171 over Rambin Bayou?

It is owned by the State Highway Agency.