Or 18 (hwy 39) over South Yamhill River
FairPolk County, Oregon · 007 MI S Valley JCT · Structure no. 00745 039 02377
- Built
- 1946
- 79 years old
- Condition
- Fair
- inspected November 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 272 ft
- 5 main spans
- Daily traffic
- 16,482
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 18 (hwy 39) over South Yamhill River is a concrete continuous tee beam carrying Or 18 (hwy 39) over South Yamhill River in Polk County, Oregon. It was built in 1946, so it is 79 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 16,482 vehicles a day, roughly 3% of them trucks, projected to reach 17,000 by 2042. The structure is 272 ft (82.9 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 Or 18 (hwy 39) over South Yamhill River built?
It was built in 1946, making it 79 years old in 2025.
What condition is Or 18 (hwy 39) over South Yamhill River 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 November 2024.
How much traffic does Or 18 (hwy 39) over South Yamhill River carry?
About 16,482 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is Or 18 (hwy 39) over South Yamhill River?
The structure is 272 ft (82.9 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.
Who owns Or 18 (hwy 39) over South Yamhill River?
It is owned by the State Highway Agency.