Interstate 5 over Dunsmuir Ave
GoodSiskiyou County, California · 02-SIS-005-3.84-DMR · Structure no. 02 0171
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 104 ft
- 1 main span
- Daily traffic
- 19,200
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 5 over Dunsmuir Ave is a prestressed concrete box beam or girders - multiple carrying Interstate 5 over Dunsmuir Ave in Siskiyou County, California. It was built in 1976, so it is 49 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 19,200 vehicles a day, roughly 26% of them trucks, projected to reach 26,613 by 2045. The structure is 104 ft (31.7 m) long and 110 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 1976, making it 49 years old in 2025.
What condition is Interstate 5 over Dunsmuir Ave in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does Interstate 5 over Dunsmuir Ave carry?
About 19,200 vehicles per day (2024 count), of which roughly 26% are trucks.
How long is Interstate 5 over Dunsmuir Ave?
The structure is 104 ft (31.7 m) long with a longest span of 102 ft (31.1 m) and a deck 110 ft wide.
Who owns Interstate 5 over Dunsmuir Ave?
It is owned by the State Highway Agency.