US Bridges

LA0500 over Lock Branch

Good

Grant Parish, Louisiana · 2.9 MI East of LA 472 · Structure no. 082201280307101

Built
1998
27 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
620
2021 count
Owner
State
State Highway Agency

About this bridge

LA0500 over Lock Branch is a concrete slab carrying LA0500 over Lock Branch in Grant Parish, Louisiana. It was built in 1998, so it is 27 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 620 vehicles a day, roughly 14% of them trucks, projected to reach 682 by 2041. The structure is 100 ft (30.5 m) long and 33 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesLA0500
CrossesLock Branch
Location2.9 MI East of LA 472
RouteState Highway 500
Coordinates31.76035, -92.4461
Functional classRural Minor 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 inspectionSeptember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 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 width33 ft (10 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2021)
Projected traffic682 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 LA0500 over Lock Branch built?

It was built in 1998, making it 27 years old in 2025.

What condition is LA0500 over Lock 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 September 2024.

How much traffic does LA0500 over Lock Branch carry?

About 620 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0500 over Lock Branch?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0500 over Lock Branch?

It is owned by the State Highway Agency.