US Bridges

LA0946 over Roberts Canal

Fair

East Baton Rouge Parish, Louisiana · 5.46M North of LA 37 · Structure no. 611708170801041

Built
1992
33 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
11,578
2021 count
Owner
State
State Highway Agency

About this bridge

LA0946 over Roberts Canal is a concrete slab carrying LA0946 over Roberts Canal in East Baton Rouge Parish, Louisiana. It was built in 1992, so it is 33 years old, younger 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 11,578 vehicles a day, roughly 7% of them trucks, projected to reach 12,735 by 2041. The structure is 160 ft (48.8 m) long and 85 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0946
CrossesRoberts Canal
Location5.46M North of LA 37
RouteState Highway 946
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.4986, -91.0884
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width85 ft (25.8 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,578 (2021)
Projected traffic12,735 by 2041
Trucks7%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 LA0946 over Roberts Canal built?

It was built in 1992, making it 33 years old in 2025.

What condition is LA0946 over Roberts Canal 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 April 2023.

How much traffic does LA0946 over Roberts Canal carry?

About 11,578 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is LA0946 over Roberts Canal?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 85 ft wide.

Who owns LA0946 over Roberts Canal?

It is owned by the State Highway Agency.