R-1S over R-1S
FairSan Mateo County, California · East of US 101 · Structure no. 35C0151
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected January 2024
- Type
- Tee Beam
- Prestressed Concrete Continuous
- Length
- 33 ft
- 1 main span
- Daily traffic
- 1,000
- 2010 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
R-1S over R-1S is a prestressed concrete continuous tee beam carrying R-1S over R-1S in San Mateo County, California. It was built in 1973, so it is 52 years old, younger 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,095 by 2042. The structure is 33 ft (10.1 m) long and 46 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 R-1S over R-1S built?
It was built in 1973, making it 52 years old in 2025.
What condition is R-1S over R-1S 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 January 2024.
How much traffic does R-1S over R-1S carry?
About 1,000 vehicles per day (2010 count), of which roughly 2% are trucks.
How long is R-1S over R-1S?
The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 46 ft wide.
Who owns R-1S over R-1S?
It is owned by the City or Municipal Highway Agency.