La 515 over Four Mile Bayou
Red River Parish, Louisiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- La 515 over Four Mile Bayou in Red River Parish, Louisiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2024, making it 1 years old at the 2025 inventory.
- It carries about 468 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 15 of the 61 inventoried bridges in Red River Parish rated good (24.6%); 16 (26.2%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (32.14956, -93.4246)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 80 ft |
| Location | 4.9 Mi NW of US 71 |
| NBI structure number | 044100000000256 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Red River Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0071 over Drain | 1975 | 9,542 | Fair |
| US0084 over Red River | 1990 | 8,296 | Fair |
| US0084 over Drain | 1974 | 4,670 | Fair |
| LA0177 over Bayou Pierre | 1982 | 2,878 | Fair |
| US0071 over Bayou Toulon | 1977 | 2,559 | Fair |
| US0071 over Morgan Creek | 1950 | 2,544 | Fair |
All bridges nearby: Red River Parish, LA bridge conditions · every bridge in Red River Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.