US0090 over Little Bayoublack
St. Mary Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US0090 over Little Bayoublack in St. Mary 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 1964, making it 61 years old at the 2025 inventory.
- It carries about 10,035 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 79 of the 124 inventoried bridges in St. Mary Parish rated fair (63.7%); 9 (7.3%) 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 February 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 → (29.69036, -91.2316)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 60 ft |
| Location | 2.0 MI W of LA 182/LA70 |
| NBI structure number | 035104240531742 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 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 St. Mary Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0090 over Ramp I | 1984 | 24,384 | Good |
| US0090 over Ramp M | 1984 | 24,384 | Good |
| US0090 over Patterson Canal | 1964 | 22,893 | Good |
| US0090 over Charenton Canal | 1978 | 21,000 | Fair |
| US0090 over Drain | 1973 | 18,127 | Fair |
| US0090 over Barrow Canal | 1964 | 17,736 | Fair |
All bridges nearby: St. Mary Parish, LA bridge conditions · every bridge in St. Mary Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.