US Bridges

LA0506 over Castor Relief

PoorClosed to traffic

Caldwell Parish, Louisiana · 7.3 MI West of US 165 · Structure no. 581103450300411

Built
1931
94 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
59 ft
3 main spans
Daily traffic
306
2021 count
Owner
State
State Highway Agency

About this bridge

LA0506 over Castor Relief is a wood or timber stringer/multi-beam or girder carrying LA0506 over Castor Relief in Caldwell Parish, Louisiana. It was built in 1931, so it is 94 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 0 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: closed to all traffic.

It carries about 306 vehicles a day, roughly 11% of them trucks, projected to reach 336 by 2041. The structure is 59 ft (18 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0506
CrossesCastor Relief
Location7.3 MI West of US 165
RouteState Highway 506
CountyCaldwell Parish
StateLouisiana
Coordinates31.99413, -92.2555
Functional classRural Local

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
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23 US tons
Inventory rating13 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 10
Structure length59 ft (18 m)
Longest span19 ft (5.8 m)
Deck width22 ft (6.6 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic306 (2021)
Projected traffic336 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed98.8 mi (159 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$319,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0506 over Castor Relief built?

It was built in 1931, making it 94 years old in 2025.

What condition is LA0506 over 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 August 2024.

How much traffic does LA0506 over Castor Relief carry?

About 306 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0506 over Castor Relief?

The structure is 59 ft (18 m) long with a longest span of 19 ft (5.8 m) and a deck 22 ft wide.

Who owns LA0506 over Castor Relief?

It is owned by the State Highway Agency.