LA3158 over Drain
Tangipahoa Parish, Louisiana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA3158 over Drain in Tangipahoa 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 1975, making it 50 years old at the 2025 inventory.
- It carries about 11,309 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 59 of the 477 inventoried bridges in Tangipahoa Parish rated poor (12.4%); 59 (12.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2023, on a 24-month routine inspection cycle.
- 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 → (30.4765, -90.4143)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Concrete slab |
| Length | about 39 ft |
| Location | 0.2 Mi S of I-12 |
| NBI structure number | 625308533900001 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 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 Tangipahoa Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0012 over Yellow Water River Rel. | 1970 | 58,377 | Good |
| I0012 over I-55 | 1970 | 58,377 | Fair |
| I0012 over Drainage | 1970 | 58,377 | Fair |
| I0012 over US 51 Bus | 1975 | 58,377 | Fair |
| I0012 over Icg Railroad | 1975 | 58,377 | Fair |
| I0012 over Ponchatoula Creek | 1975 | 58,377 | Fair |
All bridges nearby: Tangipahoa Parish, LA bridge conditions · every bridge in Tangipahoa Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.