US Bridges

LA0001 over Rocky Canal

Good

Ascension Parish, Louisiana · 5.0 MI S of Dville · Structure no. 610300500506321

Built
1983
42 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
7,858
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Rocky Canal is a concrete slab carrying LA0001 over Rocky Canal in Ascension Parish, Louisiana. It was built in 1983, so it is 42 years old, younger 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 7,858 vehicles a day, roughly 17% of them trucks, projected to reach 8,643 by 2041. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesLA0001
CrossesRocky Canal
Location5.0 MI S of Dville
RouteState Highway 1
Coordinates30.14013, -91.08741
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,858 (2021)
Projected traffic8,643 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemYes

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 LA0001 over Rocky Canal built?

It was built in 1983, making it 42 years old in 2025.

What condition is LA0001 over Rocky Canal 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 June 2024.

How much traffic does LA0001 over Rocky Canal carry?

About 7,858 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0001 over Rocky Canal?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0001 over Rocky Canal?

It is owned by the State Highway Agency.