SR 12 over Purple Draw
GoodSonoma County, California · 04-SON-012-9.84 · Structure no. 20 0275
- Built
- 1995
- 30 years old
- Condition
- Good
- inspected June 2022
- Type
- Slab
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 23,050
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
SR 12 over Purple Draw is a concrete slab carrying SR 12 over Purple Draw in Sonoma County, California. It was built in 1995, so it is 30 years old, younger 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 23,050 vehicles a day, roughly 4% of them trucks, projected to reach 37,600 by 2039. The structure is 30 ft (9.1 m) long and 56 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 12 over Purple Draw built?
It was built in 1995, making it 30 years old in 2025.
What condition is SR 12 over Purple Draw 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 June 2022.
How much traffic does SR 12 over Purple Draw carry?
About 23,050 vehicles per day (2014 count), of which roughly 4% are trucks.
How long is SR 12 over Purple Draw?
The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.6 m) and a deck 56 ft wide.
Who owns SR 12 over Purple Draw?
It is owned by the State Highway Agency.