Arnold DR over Stewart Creek
FairSonoma County, California · 0.4 MI S JCT SR 12 · Structure no. 20C0471
- Built
- 1928
- 97 years old, rebuilt 1962
- Condition
- Fair
- inspected April 2024
- Type
- Tee Beam
- Concrete
- Length
- 32 ft
- 2 main spans
- Daily traffic
- 3,700
- 2010 count
- Owner
- County
- County Highway Agency
About this bridge
Arnold DR over Stewart Creek is a concrete tee beam carrying Arnold DR over Stewart Creek in Sonoma County, California. It was built in 1928 and reconstructed in 1962, 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 fair condition with a lowest component rating of 5 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 3,700 vehicles a day, roughly 5% of them trucks, projected to reach 7,556 by 2046. The structure is 32 ft (9.8 m) long and 43 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Arnold DR over Stewart Creek built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1962.
What condition is Arnold DR over Stewart 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 April 2024.
How much traffic does Arnold DR over Stewart Creek carry?
About 3,700 vehicles per day (2010 count), of which roughly 5% are trucks.
How long is Arnold DR over Stewart Creek?
The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 43 ft wide.
Who owns Arnold DR over Stewart Creek?
It is owned by the County Highway Agency.