US Bridges

LA0121 over Yellow Dog Branch

Good

Vernon Parish, Louisiana · 0.6 Miles West of LA 28 · Structure no. 085800000080640

Built
2015
10 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
1,700
2021 count
Owner
State
State Highway Agency

About this bridge

LA0121 over Yellow Dog Branch is a concrete slab carrying LA0121 over Yellow Dog Branch in Vernon Parish, Louisiana. It was built in 2015, so it is 10 years old, younger 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 1,700 vehicles a day, roughly 14% of them trucks, projected to reach 1,870 by 2041. The structure is 80 ft (24.4 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLA0121
CrossesYellow Dog Branch
Location0.6 Miles West of LA 28
RouteState Highway 121
Coordinates31.19474, -93.0658
Functional classRural Minor Collector

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating61.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.9 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2021)
Projected traffic1,870 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0121 over Yellow Dog Branch built?

It was built in 2015, making it 10 years old in 2025.

What condition is LA0121 over Yellow Dog Branch 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 June 2024.

How much traffic does LA0121 over Yellow Dog Branch carry?

About 1,700 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0121 over Yellow Dog Branch?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns LA0121 over Yellow Dog Branch?

It is owned by the State Highway Agency.