US Bridges

LA0484 over Cane River Spillway

Good

Natchitoches Parish, Louisiana · .82 Mi. S of Int LA494 · Structure no. 083508351500821

Built
1948
77 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
111
2021 count
Owner
State
State Highway Agency

About this bridge

LA0484 over Cane River Spillway is a concrete culvert carrying LA0484 over Cane River Spillway in Natchitoches Parish, Louisiana. It was built in 1948, so it is 77 years old, older 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 111 vehicles a day, roughly 10% of them trucks, projected to reach 122 by 2041. The structure is 27 ft (8.2 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLA0484
CrossesCane River Spillway
Location.82 Mi. S of Int LA494
RouteState Highway 484
Coordinates31.56822, -92.9749
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic111 (2021)
Projected traffic122 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 LA0484 over Cane River Spillway built?

It was built in 1948, making it 77 years old in 2025.

What condition is LA0484 over Cane River Spillway 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 April 2024.

How much traffic does LA0484 over Cane River Spillway carry?

About 111 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0484 over Cane River Spillway?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 30 ft wide.

Who owns LA0484 over Cane River Spillway?

It is owned by the State Highway Agency.