East Hillsdale Bl over US Highway 101
FairSan Mateo County, California · 04-SM-101-11.15-SM · Structure no. 35 0138
- Built
- 1954
- 71 years old, rebuilt 1976
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 285 ft
- 4 main spans
- Daily traffic
- 18,300
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
East Hillsdale Bl over US Highway 101 is a steel continuous stringer/multi-beam or girder carrying East Hillsdale Bl over US Highway 101 in San Mateo County, California. It was built in 1954 and reconstructed in 1976, 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 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 18,300 vehicles a day, roughly 2% of them trucks, projected to reach 40,235 by 2041. The structure is 285 ft (86.9 m) long and 96 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 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 East Hillsdale Bl over US Highway 101 built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1976.
What condition is East Hillsdale Bl over US Highway 101 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 East Hillsdale Bl over US Highway 101 carry?
About 18,300 vehicles per day (1998 count), of which roughly 2% are trucks.
How long is East Hillsdale Bl over US Highway 101?
The structure is 285 ft (86.9 m) long with a longest span of 70 ft (21.3 m) and a deck 96 ft wide.
Who owns East Hillsdale Bl over US Highway 101?
It is owned by the State Highway Agency.