Oak Knoll Road over Spring Valley Creek
FairPolk County, Oregon · 008 W State HWY 221 · Structure no. 53C050063500091
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected August 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 56 ft
- 2 main spans
- Daily traffic
- 109
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Oak Knoll Road over Spring Valley Creek is a prestressed concrete slab carrying Oak Knoll Road over Spring Valley Creek in Polk County, Oregon. It was built in 1966, so it is 59 years old, older than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 109 vehicles a day, roughly 5% of them trucks, projected to reach 208 by 2040. The structure is 56 ft (17.1 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Oak Knoll Road over Spring Valley Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is Oak Knoll Road over Spring Valley Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does Oak Knoll Road over Spring Valley Creek carry?
About 109 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is Oak Knoll Road over Spring Valley Creek?
The structure is 56 ft (17.1 m) long with a longest span of 27 ft (8.2 m) and a deck 21 ft wide.
Who owns Oak Knoll Road over Spring Valley Creek?
It is owned by the County Highway Agency.