US Bridges

US0071 over Lays Bayou

Fair

Bossier Parish, Louisiana · 3.4 MI North of LA 527 · Structure no. 040800100606091

Built
1948
77 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
34 ft
6 main spans
Daily traffic
5,237
2021 count
Owner
State
State Highway Agency

About this bridge

US0071 over Lays Bayou is a concrete culvert carrying US0071 over Lays Bayou in Bossier Parish, Louisiana. It was built in 1948, so it is 77 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 5,237 vehicles a day, roughly 26% of them trucks, projected to reach 5,760 by 2041. The structure is 34 ft (10.4 m) long and 58 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesUS0071
CrossesLays Bayou
Location3.4 MI North of LA 527
RouteU.S. Route 71
Coordinates32.41231, -93.6247
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadH 15
Structure length34 ft (10.4 m)
Longest span5 ft (1.5 m)
Deck width58 ft (17.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,237 (2021)
Projected traffic5,760 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 US0071 over Lays Bayou built?

It was built in 1948, making it 77 years old in 2025.

What condition is US0071 over Lays 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 November 2024.

How much traffic does US0071 over Lays Bayou carry?

About 5,237 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is US0071 over Lays Bayou?

The structure is 34 ft (10.4 m) long with a longest span of 5 ft (1.5 m) and a deck 58 ft wide.

Who owns US0071 over Lays Bayou?

It is owned by the State Highway Agency.