Or 18 (hwy 39) over South Yamhill River
FairPolk County, Oregon · 00.4 MI E Grand Ronde · Structure no. 01612A039 02155
- Built
- 1931
- 94 years old, rebuilt 1981
- Condition
- Fair
- inspected November 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 122 ft
- 3 main spans
- Daily traffic
- 14,550
- 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 1931 and reconstructed in 1981, so it is 94 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 14,550 vehicles a day, roughly 3% of them trucks, projected to reach 14,700 by 2042. The structure is 122 ft (37.2 m) long and 44 ft wide. If it were closed, the detour would be 2.5 mi (4 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 | 8 Very Good | No problems noted. |
| 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 1931, making it 94 years old in 2025. It was reconstructed in 1981.
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 14,550 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 122 ft (37.2 m) long with a longest span of 62 ft (18.9 m) and a deck 44 ft wide.
Who owns Or 18 (hwy 39) over South Yamhill River?
It is owned by the State Highway Agency.