County Road over Diamond Creek
Caribou County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road over Diamond Creek in Caribou 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 1990, making it 35 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 31 of the 45 inventoried bridges in Caribou County rated fair (68.9%); 2 (4.4%) 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 → (42.74081, -111.22433)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete frame |
| Length | about 28 ft |
| Location | 15.9 S. 7.6 E. Wayan |
| NBI structure number | 000000000023309 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Caribou County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 34 over Uprr;sodas 3RD E.st Op | 1978 | 5,600 | Fair |
| US 30 over UPRR; Soda Springs Op | 1988 | 3,500 | Fair |
| SH 34 over Bear River;grace Bridge | 1974 | 2,200 | Fair |
| SH 34 over North Extension Canal | 1978 | 2,200 | Fair |
| Blackfoot River Rd over Blackfoot River | 1980 | 1,000 | Good |
| SH 34 over Blackfoot River | 1979 | 770 | Fair |
All bridges nearby: Caribou County, ID bridge conditions · every bridge in Caribou County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.