US Bridges

LA0021 over Drain

Fair

Washington Parish, Louisiana · 0.2 M N of LA 436 · Structure no. 625900300406951

Built
1965
60 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
5,485
2021 count
Owner
State
State Highway Agency

About this bridge

LA0021 over Drain is a concrete slab carrying LA0021 over Drain in Washington Parish, Louisiana. It was built in 1965, so it is 60 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 5,485 vehicles a day, roughly 11% of them trucks, projected to reach 6,033 by 2041. The structure is 140 ft (42.7 m) long and 32 ft wide.

CarriesLA0021
CrossesDrain
Location0.2 M N of LA 436
RouteState Highway 21
Coordinates30.88306, -89.8379
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating79 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,485 (2021)
Projected traffic6,033 by 2041
Trucks11%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0021 over Drain built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA0021 over Drain 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 Drain carry?

About 5,485 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0021 over Drain?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns LA0021 over Drain?

It is owned by the State Highway Agency.