US 12 over Clearwater River;bnrr
Nez Perce County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 12 over Clearwater River;bnrr in Nez Perce 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 1951 and reconstructed in 2024, making it 74 years old at the 2025 inventory.
- It carries about 21,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 49 of the 72 inventoried bridges in Nez Perce County rated fair (68.1%); 3 (4.2%) 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 6 to 9.
- Its most recent inspection on record is dated December 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (46.41694, -117.00017)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 6 | 9 | Excellent condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 1,352 ft |
| Location | In Lewiston |
| NBI structure number | 000000000010375 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Nez Perce County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SMA7344;BRYDEN Cyn over Snake R;high/southway Br | 1982 | 22,000 | Fair |
| US 12 over US 12;SNAKE River | 1939 | 21,000 | Fair |
| US 95 over Hatwai Creek | 1979 | 13,000 | Fair |
| US 95 over US 12;US 12-95 Ic | 1964 | 11,000 | Fair |
| US 12 over Aprroach Rd;catholic CR. | 1968 | 8,400 | Good |
| US 95 over Lapwai Creek | 1964 | 7,000 | Fair |
All bridges nearby: Nez Perce County, ID bridge conditions · every bridge in Nez Perce County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.