C120 Standcliffe over Silvies River
GoodHarney County, Oregon · 005 MI C121 Foley DR · Structure no. 25A32 C12000052
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 66 ft
- 1 main span
- Daily traffic
- 123
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
C120 Standcliffe over Silvies River is a prestressed concrete slab carrying C120 Standcliffe over Silvies River in Harney County, Oregon. It was built in 1979, so it is 46 years old, younger than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 123 vehicles a day, roughly 20% of them trucks, projected to reach 138 by 2025. The structure is 66 ft (20.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was C120 Standcliffe over Silvies River built?
It was built in 1979, making it 46 years old in 2025.
What condition is C120 Standcliffe over Silvies River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does C120 Standcliffe over Silvies River carry?
About 123 vehicles per day (2020 count), of which roughly 20% are trucks.
How long is C120 Standcliffe over Silvies River?
The structure is 66 ft (20.1 m) long with a longest span of 65 ft (19.8 m) and a deck 28 ft wide.
Who owns C120 Standcliffe over Silvies River?
It is owned by the County Highway Agency.