Irr Bia Rte 64 over Spring Creek
Bingham County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 64 over Spring Creek in Bingham County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 35 vehicles a day (traffic count year 2023).
- It is one of 210 of the 263 inventoried bridges in Bingham County rated fair (79.8%); 9 (3.4%) 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 June 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 → (43.06675, -112.52394)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 125 ft |
| Location | 8 Km NW of Fort Hall |
| NBI structure number | 00000000000P408 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Idaho department of transportation.
Busiest bridges in Bingham County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 15 Nbl & Sbl over Ross Fork Creek | 2023 | 29,000 | Good |
| I 15 over Riverside Canal | 2019 | 26,000 | Good |
| US 26 Ebl & Wbl over Snake River;w.blackfoot | 1965 | 18,000 | Fair |
| I 15 Nbl over Aberdeen Springfield Cnl | 1962 | 14,250 | Fair |
| I 15 Sbl over Aberdeen Springfield Cnl | 1962 | 14,250 | Fair |
| I 15 Nbl over Peoples Canal | 1962 | 14,250 | Fair |
All bridges nearby: Bingham County, ID bridge conditions · every bridge in Bingham County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.