US0171 over Bayou
Beauregard Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US0171 over Bayou in Beauregard Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 12,466 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 170 of the 221 inventoried bridges in Beauregard Parish rated fair (76.9%); 23 (10.4%) 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.
- 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 → (30.42592, -93.2326)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 35 ft |
| Location | 1.65 Miles North of Beaur |
| NBI structure number | 070600000070204 |
| 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) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Beauregard Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0171 over Hickory Branch | 1975 | 36,105 | Fair |
| US0190 over Palmetto Creek | 2012 | 18,056 | Fair |
| US0190 over Drain | 1964 | 18,056 | Poor |
| US0171 over Indian Bayou | 1932 | 12,466 | Fair |
| US0171 over Drainage | 2007 | 12,466 | Fair |
| US0171 over Creek | 1932 | 12,466 | Fair |
All bridges nearby: Beauregard Parish, LA bridge conditions · every bridge in Beauregard Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.