Hillsdale Blvd over Marina Lagoon
PoorSan Mateo County, California · 0.1 MI NE of Norfolk ST · Structure no. 35C0068
- Built
- 1963
- 62 years old, rebuilt 2003
- Condition
- Poor
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 563 ft
- 11 main spans
- Daily traffic
- 46,460
- 2010 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Hillsdale Blvd over Marina Lagoon is a prestressed concrete stringer/multi-beam or girder carrying Hillsdale Blvd over Marina Lagoon in San Mateo County, California. It was built in 1963 and reconstructed in 2003, so it is 62 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 46,460 vehicles a day, roughly 8% of them trucks, projected to reach 54,518 by 2041. The structure is 563 ft (171.6 m) long and 94 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 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Hillsdale Blvd over Marina Lagoon built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2003.
What condition is Hillsdale Blvd over Marina Lagoon 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 Hillsdale Blvd over Marina Lagoon carry?
About 46,460 vehicles per day (2010 count), of which roughly 8% are trucks.
How long is Hillsdale Blvd over Marina Lagoon?
The structure is 563 ft (171.6 m) long with a longest span of 51 ft (15.5 m) and a deck 94 ft wide.
Who owns Hillsdale Blvd over Marina Lagoon?
It is owned by the City or Municipal Highway Agency.