US Bridges

LA0107 over Spring Bayou

FairPosted for load

St. Landry Parish, Louisiana · 1.02 MI East of LA 361 · Structure no. 034901470201021

Built
1972
53 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
133 ft
5 main spans
Daily traffic
1,214
2021 count
Owner
State
State Highway Agency

About this bridge

LA0107 over Spring Bayou is a concrete slab carrying LA0107 over Spring Bayou in St. Landry Parish, Louisiana. It was built in 1972, so it is 53 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. Its operating status is: posted for load restriction.

It carries about 1,214 vehicles a day, roughly 13% of them trucks, projected to reach 1,335 by 2041. The structure is 133 ft (40.5 m) long and 31 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesLA0107
CrossesSpring Bayou
Location1.02 MI East of LA 361
RouteState Highway 107
CountySt. Landry Parish
StateLouisiana
Coordinates30.83277, -91.99184
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being 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 typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,214 (2021)
Projected traffic1,335 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 LA0107 over Spring Bayou built?

It was built in 1972, making it 53 years old in 2025.

What condition is LA0107 over Spring 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 May 2023.

How much traffic does LA0107 over Spring Bayou carry?

About 1,214 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0107 over Spring Bayou?

The structure is 133 ft (40.5 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0107 over Spring Bayou?

It is owned by the State Highway Agency.