SH 55 over Lake Fork Creek Canal
Valley County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 55 over Lake Fork Creek Canal in Valley County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 6,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 71 of the 153 inventoried bridges in Valley County rated fair (46.4%); 10 (6.5%) are rated poor.
- 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 → (44.82973, -116.08257)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 32 ft |
| Location | In Lake Fork |
| NBI structure number | 000000000014871 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Valley County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 55 over N. Fk. Payette River | 2013 | 7,800 | Fair |
| SH 55 over N.fk.payette R;lardo | 2014 | 7,400 | Fair |
| SH 55 over Lake Fork Creek | 1985 | 6,500 | Fair |
| SH 55 over Boulder Creek | 1999 | 6,000 | Fair |
| SH 55 over N. Fk. Payette River | 2015 | 5,700 | Good |
| SH 55 over Gold Fork River | 2016 | 5,200 | Fair |
All bridges nearby: Valley County, ID bridge conditions · every bridge in Valley County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.