US Bridges

LA0122 over Nantachie Creek

Fair

Grant Parish, Louisiana · 1.44 Mi. East of US 71 · Structure no. 082201290102011

Built
1982
43 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
220 ft
11 main spans
Daily traffic
683
2021 count
Owner
State
State Highway Agency

About this bridge

LA0122 over Nantachie Creek is a concrete slab carrying LA0122 over Nantachie Creek in Grant Parish, Louisiana. It was built in 1982, so it is 43 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 683 vehicles a day, roughly 14% of them trucks, projected to reach 751 by 2041. The structure is 220 ft (67.1 m) long and 43 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLA0122
CrossesNantachie Creek
Location1.44 Mi. East of US 71
RouteState Highway 122
Coordinates31.67157, -92.8601
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length220 ft (67.1 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 traffic683 (2021)
Projected traffic751 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 LA0122 over Nantachie Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is LA0122 over Nantachie Creek 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 August 2024.

How much traffic does LA0122 over Nantachie Creek carry?

About 683 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0122 over Nantachie Creek?

The structure is 220 ft (67.1 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0122 over Nantachie Creek?

It is owned by the State Highway Agency.