State Route 161 over Oregon Drain
FairSiskiyou County, California · 02-SIS-161-3.48 · Structure no. 02 0062
- Built
- 1946
- 79 years old
- Condition
- Fair
- inspected April 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 2 main spans
- Daily traffic
- 655
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 161 over Oregon Drain is a concrete continuous culvert carrying State Route 161 over Oregon Drain in Siskiyou County, California. It was built in 1946, so it is 79 years old, older than the California average of 54.8 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.
It carries about 655 vehicles a day, roughly 18% of them trucks, projected to reach 813 by 2040. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 37.9 mi (61 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 161 over Oregon Drain built?
It was built in 1946, making it 79 years old in 2025.
What condition is State Route 161 over Oregon Drain 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 April 2023.
How much traffic does State Route 161 over Oregon Drain carry?
About 655 vehicles per day (2015 count), of which roughly 18% are trucks.
How long is State Route 161 over Oregon Drain?
The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).
Who owns State Route 161 over Oregon Drain?
It is owned by the State Highway Agency.