Marsh RD over Marsh Slough
GoodSan Mateo County, California · Marsh RD at Rolison · Structure no. 35C0108
- Built
- 1960
- 65 years old
- Condition
- Good
- inspected May 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 2 main spans
- Daily traffic
- 5,300
- 2018 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Marsh RD over Marsh Slough is a concrete continuous culvert carrying Marsh RD over Marsh Slough in San Mateo County, California. It was built in 1960, so it is 65 years old, older 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 5,300 vehicles a day, roughly 1% of them trucks, projected to reach 6,630 by 2042. The structure is 27 ft (8.2 m) long and 93 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marsh RD over Marsh Slough built?
It was built in 1960, making it 65 years old in 2025.
What condition is Marsh RD over Marsh Slough 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 May 2024.
How much traffic does Marsh RD over Marsh Slough carry?
About 5,300 vehicles per day (2018 count), of which roughly 1% are trucks.
How long is Marsh RD over Marsh Slough?
The structure is 27 ft (8.2 m) long with a longest span of 13 ft (4.1 m) and a deck 93 ft wide.
Who owns Marsh RD over Marsh Slough?
It is owned by the City or Municipal Highway Agency.