Coburg Road over Curtis Slough
PoorLinn County, Oregon · 0394 MI S Harrisburg · Structure no. 12271 002A00394
- Built
- 1959
- 66 years old
- Condition
- Poor
- inspected May 2024
- Type
- Channel Beam
- Concrete
- Length
- 38 ft
- 2 main spans
- Daily traffic
- 1,854
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Coburg Road over Curtis Slough is a concrete channel beam carrying Coburg Road over Curtis Slough in Linn County, Oregon. It was built in 1959, so it is 66 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: open, would be posted or closed except for temporary shoring.
It carries about 1,854 vehicles a day, roughly 15% of them trucks, projected to reach 2,575 by 2041. The structure is 38 ft (11.6 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 Coburg Road over Curtis Slough built?
It was built in 1959, making it 66 years old in 2025.
What condition is Coburg Road over Curtis Slough 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 May 2024.
How much traffic does Coburg Road over Curtis Slough carry?
About 1,854 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is Coburg Road over Curtis Slough?
The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 34 ft wide.
Who owns Coburg Road over Curtis Slough?
It is owned by the County Highway Agency.