Or 18 (hwy 39) over South Yamhill River
GoodPolk County, Oregon · 001 MI W Valley JCT · Structure no. 01344C039 02310
- Built
- 1992
- 33 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 139 ft
- 1 main span
- Daily traffic
- 17,452
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Or 18 (hwy 39) over South Yamhill River is a prestressed concrete stringer/multi-beam or girder carrying Or 18 (hwy 39) over South Yamhill River in Polk County, Oregon. It was built in 1992, so it is 33 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 17,452 vehicles a day, roughly 3% of them trucks, projected to reach 17,600 by 2042. The structure is 139 ft (42.4 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 8 Very Good | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
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 1992, making it 33 years old in 2025.
What condition is Or 18 (hwy 39) over South Yamhill 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 November 2024.
How much traffic does Or 18 (hwy 39) over South Yamhill River carry?
About 17,452 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 139 ft (42.4 m) long with a longest span of 139 ft (42.4 m) and a deck 59 ft wide.
Who owns Or 18 (hwy 39) over South Yamhill River?
It is owned by the State Highway Agency.