US Bridges

LA3015 over Bayou Castor Relief

PoorPosted for load

De Soto Parish, Louisiana · 1.94 MI East of LA 5 · Structure no. 041602980201941

Built
1971
54 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
1,157
2021 count
Owner
State
State Highway Agency

About this bridge

LA3015 over Bayou Castor Relief is a concrete slab carrying LA3015 over Bayou Castor Relief in De Soto Parish, Louisiana. It was built in 1971, so it is 54 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 1,157 vehicles a day, roughly 25% of them trucks, projected to reach 1,272 by 2041. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLA3015
CrossesBayou Castor Relief
Location1.94 MI East of LA 5
RouteState Highway 3015
Coordinates32.09371, -93.9235
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,157 (2021)
Projected traffic1,272 by 2041
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$312,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA3015 over Bayou Castor Relief built?

It was built in 1971, making it 54 years old in 2025.

What condition is LA3015 over Bayou Castor Relief in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does LA3015 over Bayou Castor Relief carry?

About 1,157 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is LA3015 over Bayou Castor Relief?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA3015 over Bayou Castor Relief?

It is owned by the State Highway Agency.