LA0175 over Bayou San Miguel Relief
Sabine Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA0175 over Bayou San Miguel Relief in Sabine Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1934, making it 91 years old at the 2025 inventory.
- It carries about 1,587 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 72 of the 195 inventoried bridges in Sabine Parish rated fair (36.9%); 22 (11.3%) 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 August 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (31.74263, -93.5093)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 91 ft |
| Location | 1.94 M N of N Jct. La 120 |
| NBI structure number | 084300350201941 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Sabine Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0171 over Phillips Creek | 1985 | 10,204 | Fair |
| US0171 over Harpoon Bayou Relief | 1985 | 10,204 | Fair |
| US0171 over Harpoon Bayou | 1985 | 10,204 | Fair |
| LA0006 over Blackwell Creek | 1966 | 7,429 | Fair |
| LA0006 over Phillips Creek | 1966 | 7,429 | Fair |
| LA0006 over Phillips Creek | 1966 | 7,429 | Fair |
All bridges nearby: Sabine Parish, LA bridge conditions · every bridge in Sabine Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.