Or 18 (hwy 39) over South Yamhill River
FairYamhill County, Oregon · 038 MI E Polk Yam CO LN · Structure no. 08063 039 03364
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 439 ft
- 3 main spans
- Daily traffic
- 10,099
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 18 (hwy 39) over South Yamhill River is a concrete continuous box beam or girders - multiple carrying Or 18 (hwy 39) over South Yamhill River in Yamhill County, Oregon. It was built in 1956, so it is 69 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 10,099 vehicles a day, roughly 9% of them trucks, projected to reach 10,200 by 2042. The structure is 439 ft (133.8 m) long and 35 ft wide. If it were closed, the detour would be 10.6 mi (17 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 | 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 Or 18 (hwy 39) over South Yamhill River built?
It was built in 1956, making it 69 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 10,099 vehicles per day (2022 count), of which roughly 9% are trucks.
How long is Or 18 (hwy 39) over South Yamhill River?
The structure is 439 ft (133.8 m) long with a longest span of 120 ft (36.6 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.