Interstate 280 SB over Crystal Springs Off-Ramp
FairSan Mateo County, California · 04-SM-280-R20.04-SBR · Structure no. 35 0196L
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 290 ft
- 3 main spans
- Daily traffic
- 49,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 280 SB over Crystal Springs Off-Ramp is a concrete continuous box beam or girders - multiple carrying Interstate 280 SB over Crystal Springs Off-Ramp in San Mateo County, California. It was built in 1967, so it is 58 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 49,500 vehicles a day, projected to reach 66,974 by 2040. The structure is 290 ft (88.5 m) long and 70 ft wide. If it were closed, the detour would be 6.2 mi (10 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 Interstate 280 SB over Crystal Springs Off-Ramp built?
It was built in 1967, making it 58 years old in 2025.
What condition is Interstate 280 SB over Crystal Springs Off-Ramp 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 280 SB over Crystal Springs Off-Ramp carry?
About 49,500 vehicles per day (2009 count).
How long is Interstate 280 SB over Crystal Springs Off-Ramp?
The structure is 290 ft (88.5 m) long with a longest span of 116 ft (35.5 m) and a deck 70 ft wide.
Who owns Interstate 280 SB over Crystal Springs Off-Ramp?
It is owned by the State Highway Agency.