Nicasio Vly RD over Nicasio Drain #1
GoodMarin County, California · 12.4 MI N of HWY 101 · Structure no. 27C0032
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected September 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 1,750
- 1975 count
- Owner
- County
- County Highway Agency
About this bridge
Nicasio Vly RD over Nicasio Drain #1 is a concrete continuous culvert carrying Nicasio Vly RD over Nicasio Drain #1 in Marin County, California. It was built in 1968, so it is 57 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 1,750 vehicles a day, roughly 10% of them trucks, projected to reach 4,509 by 2046. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 14.3 mi (23 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nicasio Vly RD over Nicasio Drain #1 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Nicasio Vly RD over Nicasio Drain #1 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 September 2024.
How much traffic does Nicasio Vly RD over Nicasio Drain #1 carry?
About 1,750 vehicles per day (1975 count), of which roughly 10% are trucks.
How long is Nicasio Vly RD over Nicasio Drain #1?
The structure is 24 ft (7.2 m) long with a longest span of 12 ft (3.6 m).
Who owns Nicasio Vly RD over Nicasio Drain #1?
It is owned by the County Highway Agency.