Delaware ST over San Mateo Creek
GoodSan Mateo County, California · South of Cypress Ave · Structure no. 35C0088
- Built
- 1910
- 115 years old
- Condition
- Good
- inspected May 2023
- Type
- Arch - Deck
- Concrete
- Length
- 62 ft
- 1 main span
- Daily traffic
- 8,530
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Delaware ST over San Mateo Creek is a concrete arch - deck carrying Delaware ST over San Mateo Creek in San Mateo County, California. It was built in 1910, so it is 115 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 8,530 vehicles a day, roughly 5% of them trucks, projected to reach 9,814 by 2041. The structure is 62 ft (18.9 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 Delaware ST over San Mateo Creek built?
It was built in 1910, making it 115 years old in 2025.
What condition is Delaware ST over San Mateo Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does Delaware ST over San Mateo Creek carry?
About 8,530 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is Delaware ST over San Mateo Creek?
The structure is 62 ft (18.9 m) long with a longest span of 62 ft (18.9 m) and a deck 60 ft wide.
Who owns Delaware ST over San Mateo Creek?
It is owned by the City or Municipal Highway Agency.