US Bridges

US0171 over Bayou

Fair

Beauregard Parish, Louisiana · 1.65 Miles North of Beaur · Structure no. 070600000070204

Built
2007
18 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
35 ft
4 main spans
Daily traffic
12,466
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over Bayou is a concrete culvert carrying US0171 over Bayou in Beauregard Parish, Louisiana. It was built in 2007, so it is 18 years old, younger 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 12,466 vehicles a day, roughly 16% of them trucks, projected to reach 13,712 by 2041. The structure is 35 ft (10.7 m) long and 201 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0171
CrossesBayou
Location1.65 Miles North of Beaur
RouteU.S. Route 171
CountyBeauregard Parish
StateLouisiana
Coordinates30.42592, -93.2326
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
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
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 spans4
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span8 ft (2.4 m)
Deck width201 ft (61.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,466 (2021)
Projected traffic13,712 by 2041
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US0171 over Bayou built?

It was built in 2007, making it 18 years old in 2025.

What condition is US0171 over 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 July 2023.

How much traffic does US0171 over Bayou carry?

About 12,466 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is US0171 over Bayou?

The structure is 35 ft (10.7 m) long with a longest span of 8 ft (2.4 m) and a deck 201 ft wide.

Who owns US0171 over Bayou?

It is owned by the State Highway Agency.