Magnolia DR over West Slough
GoodSonoma County, California · Near Skimmer RD · Structure no. 20C0250
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected May 2023
- Type
- Slab
- Concrete Continuous
- Length
- 114 ft
- 4 main spans
- Daily traffic
- 100
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Magnolia DR over West Slough is a concrete continuous slab carrying Magnolia DR over West Slough in Sonoma County, California. It was built in 1979, so it is 46 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 100 vehicles a day, projected to reach 183 by 2040. The structure is 114 ft (34.7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Magnolia DR over West Slough built?
It was built in 1979, making it 46 years old in 2025.
What condition is Magnolia DR over West Slough 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 May 2023.
How much traffic does Magnolia DR over West Slough carry?
About 100 vehicles per day (2015 count).
How long is Magnolia DR over West Slough?
The structure is 114 ft (34.7 m) long with a longest span of 32 ft (9.8 m) and a deck 29 ft wide.
Who owns Magnolia DR over West Slough?
It is owned by the County Highway Agency.