US Bridges

LA0515 over Loggy Bayou

Good

Red River Parish, Louisiana · 2.1 MI North of LA 154 · Structure no. 044103020202101

Built
1980
45 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
353 ft
5 main spans
Daily traffic
203
2021 count
Owner
State
State Highway Agency

About this bridge

LA0515 over Loggy Bayou is a prestressed concrete continuous stringer/multi-beam or girder carrying LA0515 over Loggy Bayou in Red River Parish, Louisiana. It was built in 1980, so it is 45 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 203 vehicles a day, roughly 20% of them trucks, projected to reach 223 by 2041. The structure is 353 ft (107.6 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesLA0515
CrossesLoggy Bayou
Location2.1 MI North of LA 154
RouteState Highway 515
Coordinates32.19397, -93.4412
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length353 ft (107.6 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic203 (2021)
Projected traffic223 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 LA0515 over Loggy Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is LA0515 over Loggy Bayou 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 June 2023.

How much traffic does LA0515 over Loggy Bayou carry?

About 203 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is LA0515 over Loggy Bayou?

The structure is 353 ft (107.6 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns LA0515 over Loggy Bayou?

It is owned by the State Highway Agency.