LA0506 over Castor Creek
Caldwell Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA0506 over Castor Creek in Caldwell Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1975, making it 50 years old at the 2025 inventory.
- It carries about 306 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 44 of the 124 inventoried bridges in Caldwell Parish rated fair (35.5%); 12 (9.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (31.98519, -92.2458)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 208 ft |
| Location | 6.4 Mi West of US 165 |
| NBI structure number | 581103450301291 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Caldwell Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0165 over Black Bayou Relief | 2004 | 13,633 | Good |
| US0165 over Little Black Bayou | 2004 | 13,633 | Fair |
| US0165 over Hurricane Creek | 2004 | 13,633 | Good |
| US0165 over Ouachita River @ Columbi | 2007 | 13,633 | Fair |
| US0165 over Union Pacific R/R | 2007 | 12,669 | Fair |
| US0165 over Black Bayou Relief | 1945 | 12,669 | Fair |
All bridges nearby: Caldwell Parish, LA bridge conditions · every bridge in Caldwell Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.