Nicassio Vly RD over Halleck Creek
FairMarin County, California · 1 MI N Lucas Vly RD · Structure no. 27C0031
- Built
- 1931
- 94 years old, rebuilt 1982
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 34 ft
- 1 main span
- Daily traffic
- 2,000
- 1987 count
- Owner
- County
- County Highway Agency
About this bridge
Nicassio Vly RD over Halleck Creek is a concrete tee beam carrying Nicassio Vly RD over Halleck Creek in Marin County, California. It was built in 1931 and reconstructed in 1982, so it is 94 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,819 by 2046. The structure is 34 ft (10.4 m) long and 38 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nicassio Vly RD over Halleck Creek built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1982.
What condition is Nicassio Vly RD over Halleck 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 September 2024.
How much traffic does Nicassio Vly RD over Halleck Creek carry?
About 2,000 vehicles per day (1987 count), of which roughly 1% are trucks.
How long is Nicassio Vly RD over Halleck Creek?
The structure is 34 ft (10.4 m) long with a longest span of 31 ft (9.4 m) and a deck 38 ft wide.
Who owns Nicassio Vly RD over Halleck Creek?
It is owned by the County Highway Agency.