Lyons Rd. over Thornwell Drainage Canal
Jefferson Davis Parish, Louisiana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lyons Rd. over Thornwell Drainage Canal in Jefferson Davis Parish, Louisiana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1974, making it 51 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 45 of the 242 inventoried bridges in Jefferson Davis Parish rated poor (18.6%); 45 (18.6%) 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 → (30.08646, -92.72415)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete slab |
| Length | about 44 ft |
| Location | 0.6 MI S of LA 380 |
| NBI structure number | 072730052924351 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Jefferson Davis Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0010 over Drain | 1964 | 66,534 | Fair |
| I0010 over La 26 | 1965 | 61,210 | Fair |
| I0010 over US 165 Frontage Rd RR | 1964 | 27,700 | Poor |
| US0090 over Canal | 1931 | 14,902 | Fair |
| US0165 over Bayou | 2017 | 11,886 | Good |
| US0165 over Bayou Serpent | 2017 | 11,886 | Good |
All bridges nearby: Jefferson Davis Parish, LA bridge conditions · every bridge in Jefferson Davis Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.