Middlefield RD over San Francisquito Creek
FairSan Mateo County, California · 0.1 MI E Willow RD · Structure no. 35C0109
- Built
- 1936
- 89 years old
- Condition
- Fair
- inspected May 2024
- Type
- Arch - Deck
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 18,700
- 2016 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Middlefield RD over San Francisquito Creek is a concrete arch - deck carrying Middlefield RD over San Francisquito Creek in San Mateo County, California. It was built in 1936, so it is 89 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 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 18,700 vehicles a day, roughly 5% of them trucks, projected to reach 29,440 by 2046. The structure is 30 ft (9.1 m) long and 36 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 |
|---|---|---|
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Middlefield RD over San Francisquito Creek built?
It was built in 1936, making it 89 years old in 2025.
What condition is Middlefield 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 Middlefield RD over San Francisquito Creek carry?
About 18,700 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is Middlefield RD over San Francisquito Creek?
The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.
Who owns Middlefield RD over San Francisquito Creek?
It is owned by the City or Municipal Highway Agency.