US Bridges

LA0447 over Willis Bayou

Good

Livingston Parish, Louisiana · 0.2 M N of LA 16 · Structure no. 623202680100311

Built
1962
63 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
34,245
2021 count
Owner
State
State Highway Agency

About this bridge

LA0447 over Willis Bayou is a concrete slab carrying LA0447 over Willis Bayou in Livingston Parish, Louisiana. It was built in 1962, so it is 63 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 34,245 vehicles a day, roughly 8% of them trucks, projected to reach 37,669 by 2041. The structure is 60 ft (18.3 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesLA0447
CrossesWillis Bayou
Location0.2 M N of LA 16
RouteState Highway 447
CountyLivingston Parish
StateLouisiana
Coordinates30.35953, -90.8477
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,245 (2021)
Projected traffic37,669 by 2041
Trucks8%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$327,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0447 over Willis Bayou built?

It was built in 1962, making it 63 years old in 2025.

What condition is LA0447 over Willis Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does LA0447 over Willis Bayou carry?

About 34,245 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is LA0447 over Willis Bayou?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0447 over Willis Bayou?

It is owned by the State Highway Agency.