State Route 1 over Clarinada Avenue
FairSan Mateo County, California · 04-SM-001-R47.27-DLC · Structure no. 35 0237
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected October 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 209 ft
- 3 main spans
- Daily traffic
- 65,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Clarinada Avenue is a concrete continuous box beam or girders - multiple carrying State Route 1 over Clarinada Avenue in San Mateo County, California. It was built in 1968, so it is 57 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 65,000 vehicles a day, roughly 2% of them trucks, projected to reach 96,420 by 2042. The structure is 209 ft (63.6 m) long and 160 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 1 over Clarinada Avenue built?
It was built in 1968, making it 57 years old in 2025.
What condition is State Route 1 over Clarinada Avenue 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 October 2024.
How much traffic does State Route 1 over Clarinada Avenue carry?
About 65,000 vehicles per day (2009 count), of which roughly 2% are trucks.
How long is State Route 1 over Clarinada Avenue?
The structure is 209 ft (63.6 m) long with a longest span of 108 ft (32.9 m) and a deck 160 ft wide.
Who owns State Route 1 over Clarinada Avenue?
It is owned by the State Highway Agency.