Interstate 680 NB over Capitol Expressway
FairSanta Clara County, California · 04-SCL-680-M1.41-SJS · Structure no. 37 0288R
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 199 ft
- 2 main spans
- Daily traffic
- 80,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 680 NB over Capitol Expressway is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 680 NB over Capitol Expressway in Santa Clara County, California. It was built in 1974, so it is 51 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 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 80,000 vehicles a day, roughly 2% of them trucks, projected to reach 182,989 by 2045. The structure is 199 ft (60.7 m) long and 78 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Interstate 680 NB over Capitol Expressway built?
It was built in 1974, making it 51 years old in 2025.
What condition is Interstate 680 NB over Capitol Expressway 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 2023.
How much traffic does Interstate 680 NB over Capitol Expressway carry?
About 80,000 vehicles per day (2009 count), of which roughly 2% are trucks.
How long is Interstate 680 NB over Capitol Expressway?
The structure is 199 ft (60.7 m) long with a longest span of 99 ft (30.2 m) and a deck 78 ft wide.
Who owns Interstate 680 NB over Capitol Expressway?
It is owned by the State Highway Agency.