US Bridges

LA0120 over Cox Branch

Good

Natchitoches Parish, Louisiana · 1.2 Miles N of JCT LA 6 · Structure no. 083500000080534

Built
2009
16 years old
Condition
Good
inspected February 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
1,715
2021 count
Owner
State
State Highway Agency

About this bridge

LA0120 over Cox Branch is a concrete slab carrying LA0120 over Cox Branch in Natchitoches Parish, Louisiana. It was built in 2009, so it is 16 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 1,715 vehicles a day, roughly 14% of them trucks, projected to reach 1,886 by 2041. The structure is 100 ft (30.5 m) long and 43 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesLA0120
CrossesCox Branch
Location1.2 Miles N of JCT LA 6
RouteState Highway 120
Coordinates31.69347, -93.3145
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,715 (2021)
Projected traffic1,886 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0120 over Cox Branch built?

It was built in 2009, making it 16 years old in 2025.

What condition is LA0120 over Cox Branch 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 February 2024.

How much traffic does LA0120 over Cox Branch carry?

About 1,715 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0120 over Cox Branch?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0120 over Cox Branch?

It is owned by the State Highway Agency.