Interstate 5 NB over Shasta River
FairSiskiyou County, California · 02-SIS-005-R51.16 · Structure no. 02 0148R
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 532 ft
- 3 main spans
- Daily traffic
- 7,050
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 5 NB over Shasta River is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 5 NB over Shasta River in Siskiyou County, California. It was built in 1970, so it is 55 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 7,050 vehicles a day, roughly 32% of them trucks, projected to reach 10,270 by 2040. The structure is 532 ft (162.2 m) long and 42 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 5 NB over Shasta River built?
It was built in 1970, making it 55 years old in 2025.
What condition is Interstate 5 NB over Shasta River 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 Interstate 5 NB over Shasta River carry?
About 7,050 vehicles per day (2015 count), of which roughly 32% are trucks.
How long is Interstate 5 NB over Shasta River?
The structure is 532 ft (162.2 m) long with a longest span of 200 ft (61 m) and a deck 42 ft wide.
Who owns Interstate 5 NB over Shasta River?
It is owned by the State Highway Agency.