US Bridges

LA0016 over Willis Bayou

Fair

Livingston Parish, Louisiana · 1.6 MI N of LA 42 · Structure no. 623202620101601

Built
1982
43 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
78 ft
4 main spans
Daily traffic
10,070
2021 count
Owner
State
State Highway Agency

About this bridge

LA0016 over Willis Bayou is a concrete slab carrying LA0016 over Willis Bayou in Livingston Parish, Louisiana. It was built in 1982, so it is 43 years old, younger 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 10,070 vehicles a day, roughly 8% of them trucks, projected to reach 11,077 by 2041. The structure is 78 ft (23.8 m) long and 43 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesLA0016
CrossesWillis Bayou
Location1.6 MI N of LA 42
RouteState Highway 16
CountyLivingston Parish
StateLouisiana
Coordinates30.35363, -90.84657
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span19 ft (5.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,070 (2021)
Projected traffic11,077 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 LA0016 over Willis Bayou built?

It was built in 1982, making it 43 years old in 2025.

What condition is LA0016 over Willis 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 April 2024.

How much traffic does LA0016 over Willis Bayou carry?

About 10,070 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is LA0016 over Willis Bayou?

The structure is 78 ft (23.8 m) long with a longest span of 19 ft (5.8 m) and a deck 43 ft wide.

Who owns LA0016 over Willis Bayou?

It is owned by the State Highway Agency.