US Bridges

LA0021 over Yellow Branch

Fair

Washington Parish, Louisiana · 4.2 M NE of LA 1075 · Structure no. 625900300305211

Built
1950
75 years old, rebuilt 1987
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
45 ft
6 main spans
Daily traffic
7,160
2021 count
Owner
State
State Highway Agency

About this bridge

LA0021 over Yellow Branch is a concrete culvert carrying LA0021 over Yellow Branch in Washington Parish, Louisiana. It was built in 1950 and reconstructed in 1987, so it is 75 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 7,160 vehicles a day, roughly 12% of them trucks, projected to reach 7,876 by 2041. The structure is 45 ft (13.7 m) long and 154 ft wide.

CarriesLA0021
CrossesYellow Branch
Location4.2 M NE of LA 1075
RouteState Highway 21
Coordinates30.73306, -89.8511
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span7 ft (2.1 m)
Deck width154 ft (46.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,160 (2021)
Projected traffic7,876 by 2041
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 LA0021 over Yellow Branch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1987.

What condition is LA0021 over Yellow Branch 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 June 2024.

How much traffic does LA0021 over Yellow Branch carry?

About 7,160 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0021 over Yellow Branch?

The structure is 45 ft (13.7 m) long with a longest span of 7 ft (2.1 m) and a deck 154 ft wide.

Who owns LA0021 over Yellow Branch?

It is owned by the State Highway Agency.