US Bridges

LA0021 over Creek

Good

St. Tammany Parish, Louisiana · 5.6 M NE of LA 36 · Structure no. 625200300106231

Built
1933
92 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
29 ft
6 main spans
Daily traffic
7,775
2021 count
Owner
State
State Highway Agency

About this bridge

LA0021 over Creek is a concrete culvert carrying LA0021 over Creek in St. Tammany Parish, Louisiana. It was built in 1933, so it is 92 years old, older 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 7,775 vehicles a day, roughly 11% of them trucks, projected to reach 8,552 by 2041. The structure is 29 ft (8.8 m) long and 46 ft wide.

CarriesLA0021
CrossesCreek
Location5.6 M NE of LA 36
RouteState Highway 21
Coordinates30.54635, -90.0226
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadH 15
Structure length29 ft (8.8 m)
Longest span4 ft (1.2 m)
Deck width46 ft (14 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,775 (2021)
Projected traffic8,552 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 Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is LA0021 over Creek 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 November 2023.

How much traffic does LA0021 over Creek carry?

About 7,775 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0021 over Creek?

The structure is 29 ft (8.8 m) long with a longest span of 4 ft (1.2 m) and a deck 46 ft wide.

Who owns LA0021 over Creek?

It is owned by the State Highway Agency.