Avelene Ck. Road over Grimes Creek
Boise County, Idaho · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Avelene Ck. Road over Grimes Creek in Boise County, Idaho, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1954, making it 71 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 1992).
- It is one of 5 of the 89 inventoried bridges in Boise County rated poor (5.6%); 5 (5.6%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (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.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (43.7268, -115.95376)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 53 ft |
| Location | 9 Mi SW of Idaho City |
| NBI structure number | 040203000001046 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Boise County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 55 over McLEOD WAY | 2024 | 10,500 | Good |
| SH 55 over Payette River | 2021 | 8,800 | Good |
| SH 55 over Power Canal | 1994 | 8,800 | Good |
| SH 55 over Uprr;horseshoe Bend Op | 1971 | 7,800 | Fair |
| SH 55 over Payette River | 1971 | 7,800 | Fair |
| SH 55 over S.fk.payette River | 1955 | 7,300 | Fair |
All bridges nearby: Boise County, ID bridge conditions · every bridge in Boise County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.