HWY 485 over Skipanon River
PoorPosted for loadClatsop County, Oregon · 040 MI S Astoria · Structure no. 01400 104Y00467
- Built
- 1929
- 96 years old
- Condition
- Poor
- inspected March 2024
- Type
- Girder and Floorbeam System
- Steel
- Length
- 130 ft
- 1 main span
- Daily traffic
- 6,271
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 485 over Skipanon River is a steel girder and floorbeam system carrying HWY 485 over Skipanon River in Clatsop County, Oregon. It was built in 1929, so it is 96 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 load restriction.
It carries about 6,271 vehicles a day, roughly 9% of them trucks, projected to reach 6,800 by 2042. The structure is 130 ft (39.6 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 485 over Skipanon River built?
It was built in 1929, making it 96 years old in 2025.
What condition is HWY 485 over Skipanon 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 March 2024.
How much traffic does HWY 485 over Skipanon River carry?
About 6,271 vehicles per day (2022 count), of which roughly 9% are trucks.
How long is HWY 485 over Skipanon River?
The structure is 130 ft (39.6 m) long with a longest span of 46 ft (14 m) and a deck 27 ft wide.
Who owns HWY 485 over Skipanon River?
It is owned by the State Highway Agency.