US Bridges

LA0175 over Little Bayou Na Bonchass

Poor

De Soto Parish, Louisiana · 1.1 MI North of LA 3015 · Structure no. 041600350406231

Built
1957
68 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete
Length
200 ft
10 main spans
Daily traffic
4,306
2021 count
Owner
State
State Highway Agency

About this bridge

LA0175 over Little Bayou Na Bonchass is a concrete slab carrying LA0175 over Little Bayou Na Bonchass in De Soto Parish, Louisiana. It was built in 1957, so it is 68 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,306 vehicles a day, roughly 19% of them trucks, projected to reach 4,736 by 2041. The structure is 200 ft (61 m) long and 25 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesLA0175
CrossesLittle Bayou Na Bonchass
Location1.1 MI North of LA 3015
RouteState Highway 175
CountyDe Soto Parish
StateLouisiana
Coordinates32.12335, -93.7014
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadH 15
Structure length200 ft (61 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,306 (2021)
Projected traffic4,736 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$897,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0175 over Little Bayou Na Bonchass built?

It was built in 1957, making it 68 years old in 2025.

What condition is LA0175 over Little Bayou Na Bonchass in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does LA0175 over Little Bayou Na Bonchass carry?

About 4,306 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0175 over Little Bayou Na Bonchass?

The structure is 200 ft (61 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns LA0175 over Little Bayou Na Bonchass?

It is owned by the State Highway Agency.