SH 57 over Upper W.branch Priest R.
Bonner County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 57 over Upper W.branch Priest R. in Bonner County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1937 and reconstructed in 1985, making it 88 years old at the 2025 inventory.
- It carries about 2,700 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 55 of the 104 inventoried bridges in Bonner County rated fair (52.9%); 11 (10.6%) 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 August 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 → (48.42808, -116.95622)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 295 ft |
| Location | 19.6 N. Priest River |
| NBI structure number | 000000000014895 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 9: foundations on dry land well above flood elevations |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Bonner County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 95 over Pend Oreille R;sandpoint | 1981 | 18,500 | Fair |
| US 2 over Sand Creek | 1973 | 18,500 | Good |
| US 95 over US 95NB Off R;sand Creek | 2012 | 12,500 | Fair |
| US 95 over Bridge Street | 2012 | 12,500 | Fair |
| US 2 over Pend Oreille R;oldtown B | 1988 | 11,500 | Fair |
| US 95 over Cocolalla Creek | 2017 | 11,500 | Good |
All bridges nearby: Bonner County, ID bridge conditions · every bridge in Bonner County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.