US Bridges

US0071 over Red Bayou

Fair

Caddo Parish, Louisiana · .13 MI North of LA 170 · Structure no. 040900110400131

Built
1955
70 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
460
2021 count
Owner
State
State Highway Agency

About this bridge

US0071 over Red Bayou is a concrete culvert carrying US0071 over Red Bayou in Caddo Parish, Louisiana. It was built in 1955, so it is 70 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 460 vehicles a day, roughly 26% of them trucks, projected to reach 506 by 2041. The structure is 26 ft (7.9 m) long and 77 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS0071
CrossesRed Bayou
Location.13 MI North of LA 170
RouteU.S. Route 71
Coordinates32.82849, -93.8504
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width77 ft (23.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2021)
Projected traffic506 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo
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 US0071 over Red Bayou built?

It was built in 1955, making it 70 years old in 2025.

What condition is US0071 over Red 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 January 2024.

How much traffic does US0071 over Red Bayou carry?

About 460 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is US0071 over Red Bayou?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m) and a deck 77 ft wide.

Who owns US0071 over Red Bayou?

It is owned by the State Highway Agency.