Central Grade Road over Hatwai Creek
Nez Perce County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Central Grade Road over Hatwai Creek in Nez Perce County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1968, making it 57 years old at the 2025 inventory.
- It carries about 650 vehicles a day (traffic count year 2023).
- Its listed owner is the county 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 condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 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 → (46.44567, -116.93936)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 51 ft |
| Location | 2.2 N. 3.0 E. Lewiston |
| NBI structure number | 000000000029910 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 12 over Clearwater River;bnrr | 1951 | 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 |
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.