S5-N Mt Shasta Off over Interstate 5
FairSiskiyou County, California · 02-SIS-005-R12.06 · Structure no. 02 0091K
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 418 ft
- 5 main spans
- Daily traffic
- 1,700
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
S5-N Mt Shasta Off over Interstate 5 is a concrete continuous box beam or girders - multiple carrying S5-N Mt Shasta Off over Interstate 5 in Siskiyou County, California. It was built in 1964, so it is 61 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 5 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 1,700 vehicles a day, roughly 2% of them trucks, projected to reach 2,338 by 2040. The structure is 418 ft (127.4 m) long and 26 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S5-N Mt Shasta Off over Interstate 5 built?
It was built in 1964, making it 61 years old in 2025.
What condition is S5-N Mt Shasta Off over Interstate 5 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 September 2023.
How much traffic does S5-N Mt Shasta Off over Interstate 5 carry?
About 1,700 vehicles per day (2015 count), of which roughly 2% are trucks.
How long is S5-N Mt Shasta Off over Interstate 5?
The structure is 418 ft (127.4 m) long with a longest span of 120 ft (36.7 m) and a deck 26 ft wide.
Who owns S5-N Mt Shasta Off over Interstate 5?
It is owned by the State Highway Agency.