Alpine Road over Alpine Creek
FairSan Mateo County, California · 0.01 MI W of Pescadero RD · Structure no. 35C0121
- Built
- 1920
- 105 years old
- Condition
- Fair
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 91
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Alpine Road over Alpine Creek is a concrete arch - deck carrying Alpine Road over Alpine Creek in San Mateo County, California. It was built in 1920, so it is 105 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 91 vehicles a day, roughly 3% of them trucks, projected to reach 367 by 2044. The structure is 32 ft (9.8 m) long and 34 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 |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alpine Road over Alpine Creek built?
It was built in 1920, making it 105 years old in 2025.
What condition is Alpine Road over Alpine Creek 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 April 2024.
How much traffic does Alpine Road over Alpine Creek carry?
About 91 vehicles per day (2017 count), of which roughly 3% are trucks.
How long is Alpine Road over Alpine Creek?
The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 34 ft wide.
Who owns Alpine Road over Alpine Creek?
It is owned by the County Highway Agency.