US Bridges

LA0431 over Snells Canal

Fair

Ascension Parish, Louisiana · 0.17 Mi. N. of LA 621 · Structure no. 610302670204951

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
9,608
2021 count
Owner
State
State Highway Agency

About this bridge

LA0431 over Snells Canal is a concrete culvert carrying LA0431 over Snells Canal in Ascension Parish, Louisiana. It was built in 1997, so it is 28 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 9,608 vehicles a day, roughly 7% of them trucks, projected to reach 10,568 by 2041. The structure is 22 ft (6.7 m) long and 83 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLA0431
CrossesSnells Canal
Location0.17 Mi. N. of LA 621
RouteState Highway 431
CountyAscension Parish
StateLouisiana
Coordinates30.27796, -90.87059
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width83 ft (25.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,608 (2021)
Projected traffic10,568 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$163,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0431 over Snells Canal built?

It was built in 1997, making it 28 years old in 2025.

What condition is LA0431 over Snells 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 September 2023.

How much traffic does LA0431 over Snells Canal carry?

About 9,608 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is LA0431 over Snells Canal?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m) and a deck 83 ft wide.

Who owns LA0431 over Snells Canal?

It is owned by the State Highway Agency.