San Mateo Ave over Colma Creek
FairSan Mateo County, California · .1 MI W/O Airport Blvd · Structure no. 35C0048
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 80 ft
- 3 main spans
- Daily traffic
- 9,343
- 2009 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
San Mateo Ave over Colma Creek is a concrete continuous slab carrying San Mateo Ave over Colma Creek in San Mateo County, California. It was built in 1960, so it is 65 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 9,343 vehicles a day, roughly 15% of them trucks, projected to reach 14,964 by 2041. The structure is 80 ft (24.4 m) long and 58 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was San Mateo Ave over Colma Creek built?
It was built in 1960, making it 65 years old in 2025.
What condition is San Mateo Ave over Colma 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 2023.
How much traffic does San Mateo Ave over Colma Creek carry?
About 9,343 vehicles per day (2009 count), of which roughly 15% are trucks.
How long is San Mateo Ave over Colma Creek?
The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.3 m) and a deck 58 ft wide.
Who owns San Mateo Ave over Colma Creek?
It is owned by the City or Municipal Highway Agency.