Interstate 5 over Dunsmuir Ave
FairSiskiyou County, California · 02-SIS-005-2.51-DMR · Structure no. 02 0089
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Concrete
- Length
- 45 ft
- 1 main span
- Daily traffic
- 18,000
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 5 over Dunsmuir Ave is a concrete tee beam carrying Interstate 5 over Dunsmuir Ave in Siskiyou County, California. It was built in 1960, so it is 65 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 18,000 vehicles a day, roughly 28% of them trucks, projected to reach 26,101 by 2045. The structure is 45 ft (13.6 m) long and 84 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 5 over Dunsmuir Ave built?
It was built in 1960, making it 65 years old in 2025.
What condition is Interstate 5 over Dunsmuir Ave 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 July 2024.
How much traffic does Interstate 5 over Dunsmuir Ave carry?
About 18,000 vehicles per day (2024 count), of which roughly 28% are trucks.
How long is Interstate 5 over Dunsmuir Ave?
The structure is 45 ft (13.6 m) long with a longest span of 42 ft (12.7 m) and a deck 84 ft wide.
Who owns Interstate 5 over Dunsmuir Ave?
It is owned by the State Highway Agency.