Nicasio Val RD over Arroyo Nicasio
GoodMarin County, California · Near Lucas Valley RD · Structure no. 27C0098
- Built
- 1928
- 97 years old
- Condition
- Good
- inspected August 2023
- Type
- Tee Beam
- Concrete
- Length
- 105 ft
- 3 main spans
- Daily traffic
- 4,000
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Nicasio Val RD over Arroyo Nicasio is a concrete tee beam carrying Nicasio Val RD over Arroyo Nicasio in Marin County, California. It was built in 1928, so it is 97 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 5,732 by 2045. The structure is 105 ft (32 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nicasio Val RD over Arroyo Nicasio built?
It was built in 1928, making it 97 years old in 2025.
What condition is Nicasio Val RD over Arroyo Nicasio 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 August 2023.
How much traffic does Nicasio Val RD over Arroyo Nicasio carry?
About 4,000 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Nicasio Val RD over Arroyo Nicasio?
The structure is 105 ft (32 m) long with a longest span of 34 ft (10.4 m) and a deck 24 ft wide.
Who owns Nicasio Val RD over Arroyo Nicasio?
It is owned by the County Highway Agency.