US Bridges

LA0383 over Serpent Bayou

Fair

Jefferson Davis Parish, Louisiana · 4.7 MI N of LA 101 · Structure no. 072701970306641

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
260 ft
13 main spans
Daily traffic
5,563
2021 count
Owner
State
State Highway Agency

About this bridge

LA0383 over Serpent Bayou is a concrete slab carrying LA0383 over Serpent Bayou in Jefferson Davis Parish, Louisiana. It was built in 1965, so it is 60 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 6 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 5,563 vehicles a day, roughly 17% of them trucks, projected to reach 6,119 by 2041. The structure is 260 ft (79.2 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesLA0383
CrossesSerpent Bayou
Location4.7 MI N of LA 101
RouteState Highway 383
CountyJefferson Davis Parish
StateLouisiana
Coordinates30.35819, -93.01429
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans13
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,563 (2021)
Projected traffic6,119 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 LA0383 over Serpent Bayou built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA0383 over Serpent 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 August 2024.

How much traffic does LA0383 over Serpent Bayou carry?

About 5,563 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0383 over Serpent Bayou?

The structure is 260 ft (79.2 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0383 over Serpent Bayou?

It is owned by the State Highway Agency.