N101-BAYSHORE Off over US Highway 101
PoorSan Mateo County, California · 04-SM-101-23.39-SSF · Structure no. 35 0131S
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 374 ft
- 4 main spans
- Daily traffic
- 8,000
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
N101-BAYSHORE Off over US Highway 101 is a concrete continuous box beam or girders - multiple carrying N101-BAYSHORE Off over US Highway 101 in San Mateo County, California. It was built in 1957, so it is 68 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 8,000 vehicles a day, roughly 2% of them trucks, projected to reach 25,651 by 2040. The structure is 374 ft (114 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N101-BAYSHORE Off over US Highway 101 built?
It was built in 1957, making it 68 years old in 2025.
What condition is N101-BAYSHORE Off over US Highway 101 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.
How much traffic does N101-BAYSHORE Off over US Highway 101 carry?
About 8,000 vehicles per day (1998 count), of which roughly 2% are trucks.
How long is N101-BAYSHORE Off over US Highway 101?
The structure is 374 ft (114 m) long with a longest span of 108 ft (32.9 m) and a deck 27 ft wide.
Who owns N101-BAYSHORE Off over US Highway 101?
It is owned by the State Highway Agency.