US Bridges

LA0040 over L Natalbany Rel

Good

Livingston Parish, Louisiana · 2.5 M E of LA 43 · Structure no. 623204150102641

Built
1960
65 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
913
2021 count
Owner
State
State Highway Agency

About this bridge

LA0040 over L Natalbany Rel is a concrete slab carrying LA0040 over L Natalbany Rel in Livingston Parish, Louisiana. It was built in 1960, so it is 65 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 913 vehicles a day, roughly 12% of them trucks, projected to reach 1,004 by 2041. The structure is 60 ft (18.3 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesLA0040
CrossesL Natalbany Rel
Location2.5 M E of LA 43
RouteState Highway 40
CountyLivingston Parish
StateLouisiana
Coordinates30.64314, -90.5767
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic913 (2021)
Projected traffic1,004 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed—
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 LA0040 over L Natalbany Rel built?

It was built in 1960, making it 65 years old in 2025.

What condition is LA0040 over L Natalbany Rel 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 March 2024.

How much traffic does LA0040 over L Natalbany Rel carry?

About 913 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0040 over L Natalbany Rel?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0040 over L Natalbany Rel?

It is owned by the State Highway Agency.