I-280 NB Offramp over Los Trancos Creek
FairSan Mateo County, California · 04-SM-280-R0.01 · Structure no. 35 0009S
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 86 ft
- 1 main span
- Daily traffic
- 6,700
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
I-280 NB Offramp over Los Trancos Creek is a concrete box beam or girders - multiple carrying I-280 NB Offramp over Los Trancos Creek in San Mateo County, California. It was built in 1969, so it is 56 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 6,700 vehicles a day, roughly 2% of them trucks, projected to reach 10,688 by 2040. The structure is 86 ft (26.2 m) long and 40 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 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-280 NB Offramp over Los Trancos Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is I-280 NB Offramp over Los Trancos 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 2023.
How much traffic does I-280 NB Offramp over Los Trancos Creek carry?
About 6,700 vehicles per day (1998 count), of which roughly 2% are trucks.
How long is I-280 NB Offramp over Los Trancos Creek?
The structure is 86 ft (26.2 m) long with a longest span of 84 ft (25.6 m) and a deck 40 ft wide.
Who owns I-280 NB Offramp over Los Trancos Creek?
It is owned by the State Highway Agency.