U.S. Highway 101 over Borel Creek
FairSan Mateo County, California · 04-SM-101-11.67-SM · Structure no. 35 0140
- Built
- 1954
- 71 years old, rebuilt 1985
- Condition
- Fair
- inspected August 2023
- Type
- Slab
- Concrete Continuous
- Length
- 33 ft
- 2 main spans
- Daily traffic
- 195,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Borel Creek is a concrete continuous slab carrying U.S. Highway 101 over Borel Creek in San Mateo County, California. It was built in 1954 and reconstructed in 1985, so it is 71 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 195,000 vehicles a day, roughly 5% of them trucks, projected to reach 265,675 by 2043. The structure is 33 ft (10.1 m) long and 262 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 U.S. Highway 101 over Borel Creek built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1985.
What condition is U.S. Highway 101 over Borel 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 August 2023.
How much traffic does U.S. Highway 101 over Borel Creek carry?
About 195,000 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is U.S. Highway 101 over Borel Creek?
The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 262 ft wide.
Who owns U.S. Highway 101 over Borel Creek?
It is owned by the State Highway Agency.