Interstate 5 NB over State Route 97
FairSiskiyou County, California · 02-SIS-005-R19.05-WEED · Structure no. 02 0170R
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 172 ft
- 1 main span
- Daily traffic
- 12,300
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 5 NB over State Route 97 is a prestressed concrete box beam or girders - multiple carrying Interstate 5 NB over State Route 97 in Siskiyou County, California. It was built in 1973, so it is 52 years old, younger 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 12,300 vehicles a day, roughly 32% of them trucks, projected to reach 19,319 by 2040. The structure is 172 ft (52.4 m) long and 42 ft wide.
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 5 NB over State Route 97 built?
It was built in 1973, making it 52 years old in 2025.
What condition is Interstate 5 NB over State Route 97 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 State Route 97 carry?
About 12,300 vehicles per day (2015 count), of which roughly 32% are trucks.
How long is Interstate 5 NB over State Route 97?
The structure is 172 ft (52.4 m) long with a longest span of 170 ft (51.8 m) and a deck 42 ft wide.
Who owns Interstate 5 NB over State Route 97?
It is owned by the State Highway Agency.