I0010 over Bayou Portage
St. Martin Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I0010 over Bayou Portage in St. Martin Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970 and reconstructed in 2021, making it 55 years old at the 2025 inventory.
- It carries about 37,370 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 61 of the 117 inventoried bridges in St. Martin Parish rated fair (52.1%); 10 (8.5%) 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 May 2023, on a 24-month routine inspection cycle.
- 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 → (30.32173, -91.8)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 182 ft |
| Location | 2.0 Mi East of La 347 |
| NBI structure number | 035004500609521 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 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 St. Martin Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0090 over Creek | 1965 | 62,432 | Fair |
| Sawmill Rd over I-10 | 1970 | 60,066 | Good |
| I0010 over Atchafalaya River | 1972 | 56,100 | Fair |
| I0010-e over La 328 | 2020 | 50,425 | Good |
| I0010 over Bayou Teche | 1970 | 50,425 | Good |
| I0010 over E Atchafalaya Floodway | 1972 | 42,449 | Fair |
All bridges nearby: St. Martin Parish, LA bridge conditions · every bridge in St. Martin Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.