Viola Road over Four Mile Creek
Latah County, Idaho · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Viola Road over Four Mile Creek in Latah County, Idaho, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2015, making it 10 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 2023).
- It is one of 47 of the 119 inventoried bridges in Latah County rated good (39.5%); 1 (0.8%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (46.83472, -117.02894)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 27 ft |
| Location | 0.2 S. 0.1 W. Viola |
| NBI structure number | 000000000029688 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Latah County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 8 over Paradise Crk;ped Walkway | 1983 | 12,000 | Fair |
| US 95 over Paradise Creek | 2000 | 11,500 | Fair |
| US 95 over S.fk. Palouse River | 2004 | 7,500 | Fair |
| Stc 7664;W. 6TH St over Paradise Creek | 1916 | 7,500 | Fair |
| Sma 7674;MTN View over Paradise Creek | 1993 | 7,300 | Fair |
| Stc 7704;PERIMETER over Paradise Creek | 1953 | 7,000 | Fair |
All bridges nearby: Latah County, ID bridge conditions · every bridge in Latah County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.