US Bridges

LA0108 over Bayou

Fair

Calcasieu Parish, Louisiana · 4.4 MI South of I-10 · Structure no. 071001920104711

Built
1961
64 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
1,259
2022 count
Owner
State
State Highway Agency

About this bridge

LA0108 over Bayou is a concrete culvert carrying LA0108 over Bayou in Calcasieu Parish, Louisiana. It was built in 1961, so it is 64 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 1,259 vehicles a day, roughly 17% of them trucks, projected to reach 1,384 by 2042. The structure is 26 ft (7.9 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0108
CrossesBayou
Location4.4 MI South of I-10
RouteState Highway 108
CountyCalcasieu Parish
StateLouisiana
Coordinates30.14407, -93.53641
Functional classRural Minor 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 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 inspectionMarch 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,259 (2022)
Projected traffic1,384 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 LA0108 over Bayou built?

It was built in 1961, making it 64 years old in 2025.

What condition is LA0108 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 March 2023.

How much traffic does LA0108 over Bayou carry?

About 1,259 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is LA0108 over Bayou?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns LA0108 over Bayou?

It is owned by the State Highway Agency.