Mariners Island Bl over State Route 92
GoodSan Mateo County, California · 04-SM-092-R12.78-SM · Structure no. 35 0284
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 906 ft
- 5 main spans
- Daily traffic
- 2,330
- 2000 count
- Owner
- State
- State Highway Agency
About this bridge
Mariners Island Bl over State Route 92 is a prestressed concrete continuous box beam or girders - multiple carrying Mariners Island Bl over State Route 92 in San Mateo County, California. It was built in 1977, so it is 48 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,330 vehicles a day, roughly 2% of them trucks, projected to reach 6,453 by 2042. The structure is 906 ft (276.1 m) long and 85 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mariners Island Bl over State Route 92 built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mariners Island Bl over State Route 92 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does Mariners Island Bl over State Route 92 carry?
About 2,330 vehicles per day (2000 count), of which roughly 2% are trucks.
How long is Mariners Island Bl over State Route 92?
The structure is 906 ft (276.1 m) long with a longest span of 125 ft (38.1 m) and a deck 85 ft wide.
Who owns Mariners Island Bl over State Route 92?
It is owned by the State Highway Agency.