I 86 Wbl over Sunbeam Road Gs
Power County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 86 Wbl over Sunbeam Road Gs in Power 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 1959, making it 66 years old at the 2025 inventory.
- It carries about 4,350 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 47 of the 71 inventoried bridges in Power County rated fair (66.2%); 1 (1.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 7, superstructure 5 to 7.
- Its most recent inspection on record is dated May 2024, on a 48-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 → (42.77692, -112.84893)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 5 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete stringer or multi-beam girder |
| Length | about 107 ft |
| Location | at American Falls |
| NBI structure number | 000000000010770 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Power County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 86 & Ramps over Lanes Gulch | 1981 | 8,300 | Fair |
| I 86 Wbl & Ebl over Cannell Ln;machine Pass | 1980 | 8,300 | Fair |
| I 86 Wbl & Ebl over Calls Road Gs | 1979 | 8,000 | Good |
| I 86 Ebl over Uprr;pocatello Airport | 1968 | 6,750 | Fair |
| I 86 Wbl over Uprr;pocatello Airport | 1968 | 6,750 | Fair |
| I 86 Ebl over Portneuf River | 1968 | 6,750 | Fair |
All bridges nearby: Power County, ID bridge conditions · every bridge in Power County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.