U.S. Highway 101 over Marsh Creek
FairSan Mateo County, California · 04-SM-101-3.70-MLP · Structure no. 35 0064
- Built
- 1930
- 95 years old, rebuilt 1958
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 199,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Marsh Creek is a concrete continuous culvert carrying U.S. Highway 101 over Marsh Creek in San Mateo County, California. It was built in 1930 and reconstructed in 1958, so it is 95 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 199,000 vehicles a day, roughly 4% of them trucks, projected to reach 256,620 by 2045. The structure is 21 ft (6.3 m) long and 276 ft wide. If it were closed, the detour would be 5 mi (8 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Marsh Creek built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1958.
What condition is U.S. Highway 101 over Marsh 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 August 2023.
How much traffic does U.S. Highway 101 over Marsh Creek carry?
About 199,000 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is U.S. Highway 101 over Marsh Creek?
The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 276 ft wide.
Who owns U.S. Highway 101 over Marsh Creek?
It is owned by the State Highway Agency.