US Bridges

LA0122 over Black Creek

Good

Grant Parish, Louisiana · 8.94 M E of E JCT LA 471 · Structure no. 082201290208941

Built
1999
26 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
683
2021 count
Owner
State
State Highway Agency

About this bridge

LA0122 over Black Creek is a concrete slab carrying LA0122 over Black Creek in Grant Parish, Louisiana. It was built in 1999, so it is 26 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 683 vehicles a day, roughly 14% of them trucks, projected to reach 751 by 2041. The structure is 140 ft (42.7 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLA0122
CrossesBlack Creek
Location8.94 M E of E JCT LA 471
RouteState Highway 122
Coordinates31.63376, -92.634
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0122 over Black Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is LA0122 over Black Creek 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 August 2024.

How much traffic does LA0122 over Black Creek carry?

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

How long is LA0122 over Black Creek?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0122 over Black Creek?

It is owned by the State Highway Agency.