US0051 over Drainage Canal
St. John the Baptist Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US0051 over Drainage Canal in St. John the Baptist 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 1975, making it 50 years old at the 2025 inventory.
- It carries about 20,097 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 26 of the 40 inventoried bridges in St. John the Baptist Parish rated fair (65.0%); 1 (2.5%) are rated poor.
- 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 → (30.09515, -90.43746)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 89 ft |
| Location | 25.6 miles south of LA 22 |
| NBI structure number | 624804520100534 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in St. John the Baptist Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0010 over US 51 & Swamps | 1972 | 48,723 | Fair |
| I0010 over Hope Canal | 1975 | 44,074 | Fair |
| I0010 over Mississippi Bayou | 1975 | 44,074 | Fair |
| I0010 over Reserve Relief Canal | 1974 | 44,074 | Fair |
| I0055 over Swamp | 1975 | 28,021 | Good |
| I0055 over Swamp | 2008 | 27,551 | Fair |
All bridges nearby: St. John the Baptist Parish, LA bridge conditions · every bridge in St. John the Baptist Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.