US101 (hwy 9) over Siletz River
FairPosted for loadLincoln County, Oregon · Kernville · Structure no. 09906 009 12016
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 920 ft
- 6 main spans
- Daily traffic
- 12,924
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US101 (hwy 9) over Siletz River is a prestressed concrete continuous box beam or girders - multiple carrying US101 (hwy 9) over Siletz River in Lincoln County, Oregon. It was built in 1973, so it is 52 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. Its operating status is: posted for other load-capacity restriction.
It carries about 12,924 vehicles a day, roughly 4% of them trucks, projected to reach 13,000 by 2042. The structure is 920 ft (280.4 m) long and 87 ft wide. If it were closed, the detour would be 41.6 mi (67 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US101 (hwy 9) over Siletz River built?
It was built in 1973, making it 52 years old in 2025.
What condition is US101 (hwy 9) over Siletz 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 June 2023.
How much traffic does US101 (hwy 9) over Siletz River carry?
About 12,924 vehicles per day (2022 count), of which roughly 4% are trucks.
How long is US101 (hwy 9) over Siletz River?
The structure is 920 ft (280.4 m) long with a longest span of 165 ft (50.3 m) and a deck 87 ft wide.
Who owns US101 (hwy 9) over Siletz River?
It is owned by the State Highway Agency.