US Bridges

LA0409 over Sandy Creek

PoorPosted for load

East Baton Rouge Parish, Louisiana · 6.7 Mi. N of LA 64 · Structure no. 611708170406691

Built
1979
46 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
3,092
2021 count
Owner
State
State Highway Agency

About this bridge

LA0409 over Sandy Creek is a concrete slab carrying LA0409 over Sandy Creek in East Baton Rouge Parish, Louisiana. It was built in 1979, so it is 46 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 3,092 vehicles a day, roughly 10% of them trucks, projected to reach 3,401 by 2041. The structure is 76 ft (23.2 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesLA0409
CrossesSandy Creek
Location6.7 Mi. N of LA 64
RouteState Highway 409
Coordinates30.69393, -90.97807
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating28.9 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 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
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$393,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0409 over Sandy Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is LA0409 over Sandy Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does LA0409 over Sandy Creek carry?

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

How long is LA0409 over Sandy Creek?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 43 ft wide.

Who owns LA0409 over Sandy Creek?

It is owned by the State Highway Agency.