US Bridges

LA0175 over Bayou Na Bonchasse Relie

Good

De Soto Parish, Louisiana · 4.59 MI N. of US 84 · Structure no. 041600350404591

Built
2000
25 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
25 ft
4 main spans
Daily traffic
4,494
2021 count
Owner
State
State Highway Agency

About this bridge

LA0175 over Bayou Na Bonchasse Relie is a concrete culvert carrying LA0175 over Bayou Na Bonchasse Relie in De Soto Parish, Louisiana. It was built in 2000, so it is 25 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,494 vehicles a day, roughly 19% of them trucks, projected to reach 4,943 by 2041. The structure is 25 ft (7.6 m) long and 84 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLA0175
CrossesBayou Na Bonchasse Relie
Location4.59 MI N. of US 84
RouteState Highway 175
Coordinates32.10122, -93.6971
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span6 ft (1.8 m)
Deck width84 ft (25.5 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,494 (2021)
Projected traffic4,943 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$175,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0175 over Bayou Na Bonchasse Relie built?

It was built in 2000, making it 25 years old in 2025.

What condition is LA0175 over Bayou Na Bonchasse Relie in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does LA0175 over Bayou Na Bonchasse Relie carry?

About 4,494 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0175 over Bayou Na Bonchasse Relie?

The structure is 25 ft (7.6 m) long with a longest span of 6 ft (1.8 m) and a deck 84 ft wide.

Who owns LA0175 over Bayou Na Bonchasse Relie?

It is owned by the State Highway Agency.