US Bridges

LA 0015 over Old River Aux. C.S.

Fair

Concordia Parish, Louisiana · 75 Mi. NW of Baton Rouge · Structure no. 581501770308171

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,444 ft
20 main spans
Daily traffic
807
2023 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

LA 0015 over Old River Aux. C.S. is a prestressed concrete stringer/multi-beam or girder carrying LA 0015 over Old River Aux. C.S. in Concordia Parish, Louisiana. It was built in 1986, so it is 39 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 807 vehicles a day, roughly 10% of them trucks, projected to reach 1,000 by 2041. The structure is 1,444 ft (440.1 m) long and 34 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesLA 0015
CrossesOld River Aux. C.S.
Location75 Mi. NW of Baton Rouge
RouteState Highway 15
CountyConcordia Parish
StateLouisiana
Coordinates31.065, -91.59
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.7 US tons
Inventory rating61.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length1,444 ft (440.1 m)
Longest span76 ft (23.1 m)
Deck width34 ft (10.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic807 (2023)
Projected traffic1,000 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was LA 0015 over Old River Aux. C.S. built?

It was built in 1986, making it 39 years old in 2025.

What condition is LA 0015 over Old River Aux. C.S. 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 LA 0015 over Old River Aux. C.S. carry?

About 807 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is LA 0015 over Old River Aux. C.S.?

The structure is 1,444 ft (440.1 m) long with a longest span of 76 ft (23.1 m) and a deck 34 ft wide.

Who owns LA 0015 over Old River Aux. C.S.?

It is owned by the Corps of Engineers (Civil).