US101 (hwy 9) over Siuslaw River
PoorPosted for loadLane County, Oregon · 00.7 MI S HWY 062 JCT · Structure no. 01821E009 19098
- Built
- 1936
- 89 years old, rebuilt 1977
- Condition
- Poor
- inspected July 2023
- Type
- Movable - Bascule
- Steel
- Length
- 1,649 ft
- 1 main span
- Daily traffic
- 10,905
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US101 (hwy 9) over Siuslaw River is a steel movable - bascule carrying US101 (hwy 9) over Siuslaw River in Lane County, Oregon. It was built in 1936 and reconstructed in 1977, so it is 89 years old, older than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.
It carries about 10,905 vehicles a day, roughly 13% of them trucks, projected to reach 11,000 by 2042. The structure is 1,649 ft (502.7 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 US101 (hwy 9) over Siuslaw River built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1977.
What condition is US101 (hwy 9) over Siuslaw River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.
How much traffic does US101 (hwy 9) over Siuslaw River carry?
About 10,905 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is US101 (hwy 9) over Siuslaw River?
The structure is 1,649 ft (502.7 m) long with a longest span of 154 ft (46.9 m) and a deck 36 ft wide.
Who owns US101 (hwy 9) over Siuslaw River?
It is owned by the State Highway Agency.