US Bridges

LA1111 over Wykoff Bayou

Fair

Acadia Parish, Louisiana · 1.1 MI North of I-10 · Structure no. 030108013002651

Built
1963
62 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
220 ft
11 main spans
Daily traffic
1,773
2021 count
Owner
State
State Highway Agency

About this bridge

LA1111 over Wykoff Bayou is a concrete slab carrying LA1111 over Wykoff Bayou in Acadia Parish, Louisiana. It was built in 1963, so it is 62 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 1,773 vehicles a day, roughly 13% of them trucks, projected to reach 1,950 by 2041. The structure is 220 ft (67.1 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLA1111
CrossesWykoff Bayou
Location1.1 MI North of I-10
RouteState Highway 1111
CountyAcadia Parish
StateLouisiana
Coordinates30.2522, -92.3625
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
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,773 (2021)
Projected traffic1,950 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$975,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA1111 over Wykoff Bayou built?

It was built in 1963, making it 62 years old in 2025.

What condition is LA1111 over Wykoff 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 February 2023.

How much traffic does LA1111 over Wykoff Bayou carry?

About 1,773 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA1111 over Wykoff Bayou?

The structure is 220 ft (67.1 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA1111 over Wykoff Bayou?

It is owned by the State Highway Agency.