US Bridges

LA0409 over Sandy Creek Relief

Fair

East Baton Rouge Parish, Louisiana · 7.01 MI N JCT LA 64 · Structure no. 611708170407011

Built
1981
44 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
38 ft
2 main spans
Daily traffic
3,092
2021 count
Owner
State
State Highway Agency

About this bridge

LA0409 over Sandy Creek Relief is a concrete slab carrying LA0409 over Sandy Creek Relief in East Baton Rouge Parish, Louisiana. It was built in 1981, so it is 44 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 3,092 vehicles a day, roughly 10% of them trucks, projected to reach 3,401 by 2041. The structure is 38 ft (11.6 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLA0409
CrossesSandy Creek Relief
Location7.01 MI N JCT LA 64
RouteState Highway 409
Coordinates30.69387, -90.97424
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,092 (2021)
Projected traffic3,401 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed5 mi (8 km)
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 LA0409 over Sandy Creek Relief built?

It was built in 1981, making it 44 years old in 2025.

What condition is LA0409 over Sandy Creek Relief 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 January 2024.

How much traffic does LA0409 over Sandy Creek Relief carry?

About 3,092 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0409 over Sandy Creek Relief?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0409 over Sandy Creek Relief?

It is owned by the State Highway Agency.