US Bridges

LA0021 over Scarboroughs Creek

Fair

Washington Parish, Louisiana · 1.7 M SW of LA 438 · Structure no. 625900300411081

Built
1960
65 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
4,719
2021 count
Owner
State
State Highway Agency

About this bridge

LA0021 over Scarboroughs Creek is a concrete slab carrying LA0021 over Scarboroughs Creek in Washington Parish, Louisiana. It was built in 1960, so it is 65 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 4,719 vehicles a day, roughly 11% of them trucks, projected to reach 5,190 by 2041. The structure is 60 ft (18.3 m) long and 33 ft wide.

CarriesLA0021
CrossesScarboroughs Creek
Location1.7 M SW of LA 438
RouteState Highway 21
Coordinates30.9396, -89.8273
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,719 (2021)
Projected traffic5,190 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 Scarboroughs Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is LA0021 over Scarboroughs Creek 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 July 2024.

How much traffic does LA0021 over Scarboroughs Creek carry?

About 4,719 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0021 over Scarboroughs Creek?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0021 over Scarboroughs Creek?

It is owned by the State Highway Agency.