LA0077 over Port Allen Lock
Iberville Parish, Louisiana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA0077 over Port Allen Lock in Iberville Parish, Louisiana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 4,376 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 10 of the 80 inventoried bridges in Iberville Parish rated poor (12.5%); 10 (12.5%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (30.26834, -91.32059)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel movable swing |
| Length | about 386 ft |
| Location | LA0077 |
| NBI structure number | 612402190107251 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Iberville Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0010 over UP Railroad | 1972 | 60,154 | Fair |
| I0010 over Trinity Drainage Canal | 1971 | 58,734 | Fair |
| I0010 over UP Railroad | 1972 | 58,734 | Fair |
| I0010 over La 77 La 411 Bayou | 1972 | 58,734 | Fair |
| I0010 over Bridge 250 Ebl | 1974 | 58,734 | Good |
| I0010 over West Floodway | 1972 | 42,449 | Fair |
All bridges nearby: Iberville Parish, LA bridge conditions · every bridge in Iberville Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.