US101 (hwy 9) over Columbia River
PoorPosted for loadClatsop County, Oregon · Desdemona Sands · Structure no. 07949B009 00028
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 11,200 ft
- 140 main spans
- Daily traffic
- 9,117
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US101 (hwy 9) over Columbia River is a prestressed concrete stringer/multi-beam or girder carrying US101 (hwy 9) over Columbia River in Clatsop County, Oregon. It was built in 1966, so it is 59 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 9,117 vehicles a day, roughly 5% of them trucks, projected to reach 13,200 by 2042. The structure is 11,200 ft (3,413.8 m) long and 33 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Columbia River built?
It was built in 1966, making it 59 years old in 2025.
What condition is US101 (hwy 9) over Columbia 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 October 2023.
How much traffic does US101 (hwy 9) over Columbia River carry?
About 9,117 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is US101 (hwy 9) over Columbia River?
The structure is 11,200 ft (3,413.8 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.
Who owns US101 (hwy 9) over Columbia River?
It is owned by the State Highway Agency.