Alpine RD over San Francisquito Creek
FairSan Mateo County, California · 0.3 MI N of I-280 · Structure no. 35C0016
- Built
- 1950
- 75 years old, rebuilt 1995
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 119 ft
- 1 main span
- Daily traffic
- 16,957
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Alpine RD over San Francisquito Creek is a prestressed concrete stringer/multi-beam or girder carrying Alpine RD over San Francisquito Creek in San Mateo County, California. It was built in 1950 and reconstructed in 1995, so it is 75 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 16,957 vehicles a day, roughly 3% of them trucks, projected to reach 10,795 by 2046. The structure is 119 ft (36.3 m) long and 51 ft wide. If it were closed, the detour would be 5 mi (8 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alpine RD over San Francisquito Creek built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1995.
What condition is Alpine RD over San Francisquito 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 May 2024.
How much traffic does Alpine RD over San Francisquito Creek carry?
About 16,957 vehicles per day (2017 count), of which roughly 3% are trucks.
How long is Alpine RD over San Francisquito Creek?
The structure is 119 ft (36.3 m) long with a longest span of 117 ft (35.7 m) and a deck 51 ft wide.
Who owns Alpine RD over San Francisquito Creek?
It is owned by the County Highway Agency.