State Route 1 NB over Pilarcitos Creek
FairSan Mateo County, California · 04-SM-001-28.92-HMBY · Structure no. 35 0139R
- Built
- 1954
- 71 years old, rebuilt 1992
- Condition
- Fair
- inspected October 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 147 ft
- 3 main spans
- Daily traffic
- 14,750
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 NB over Pilarcitos Creek is a concrete continuous tee beam carrying State Route 1 NB over Pilarcitos Creek in San Mateo County, California. It was built in 1954 and reconstructed in 1992, 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 6 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 14,750 vehicles a day, roughly 3% of them trucks, projected to reach 26,100 by 2042. The structure is 147 ft (44.7 m) long and 45 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 1 NB over Pilarcitos Creek built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1992.
What condition is State Route 1 NB over Pilarcitos Creek 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 October 2024.
How much traffic does State Route 1 NB over Pilarcitos Creek carry?
About 14,750 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is State Route 1 NB over Pilarcitos Creek?
The structure is 147 ft (44.7 m) long with a longest span of 58 ft (17.7 m) and a deck 45 ft wide.
Who owns State Route 1 NB over Pilarcitos Creek?
It is owned by the State Highway Agency.