LA0490 over Bayou Mayo
Natchitoches Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA0490 over Bayou Mayo in Natchitoches Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1993, making it 32 years old at the 2025 inventory.
- It carries about 142 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 145 of the 320 inventoried bridges in Natchitoches Parish rated fair (45.3%); 46 (14.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 6).
- Its most recent inspection on record is dated April 2024, 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 → (31.47436, -92.8757)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 100 ft |
| Location | 3.67 Mi. SW of La 1 |
| NBI structure number | 083500000080113 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| 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 Natchitoches Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0049 over La 490 | 1985 | 28,142 | Good |
| I0049 over Bayou Barbue | 1984 | 28,142 | Fair |
| I0049 over Barbue Bayou Trib. | 1984 | 28,142 | Fair |
| I0049 over Emmanuel Road | 1985 | 28,142 | Fair |
| I0049 over Comitte Bayou | 1984 | 28,142 | Fair |
| I0049 over LA119 | 1985 | 28,142 | Fair |
All bridges nearby: Natchitoches Parish, LA bridge conditions · every bridge in Natchitoches Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.