US Bridges

LA0175 over Chatman Bayou

Fair

De Soto Parish, Louisiana · 3.6 MI North of North Int · Structure no. 041600350313701

Built
1950
75 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
1,770
2021 count
Owner
State
State Highway Agency

About this bridge

LA0175 over Chatman Bayou is a concrete culvert carrying LA0175 over Chatman Bayou in De Soto Parish, Louisiana. It was built in 1950, so it is 75 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 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 1,770 vehicles a day, roughly 19% of them trucks, projected to reach 1,947 by 2041. The structure is 33 ft (10.1 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLA0175
CrossesChatman Bayou
Location3.6 MI North of North Int
RouteState Highway 175
CountyDe Soto Parish
StateLouisiana
Coordinates31.98898, -93.63023
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width37 ft (11.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,770 (2021)
Projected traffic1,947 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 LA0175 over Chatman Bayou built?

It was built in 1950, making it 75 years old in 2025.

What condition is LA0175 over Chatman 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 May 2024.

How much traffic does LA0175 over Chatman Bayou carry?

About 1,770 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0175 over Chatman Bayou?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 37 ft wide.

Who owns LA0175 over Chatman Bayou?

It is owned by the State Highway Agency.