Westside Road over Mill Creek
GoodSonoma County, California · 0.2 MI N Foreman Lane · Structure no. 20C0071
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 115 ft
- 3 main spans
- Daily traffic
- 3,200
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Westside Road over Mill Creek is a concrete continuous tee beam carrying Westside Road over Mill Creek in Sonoma County, California. It was built in 1961, so it is 64 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 3,200 vehicles a day, roughly 1% of them trucks, projected to reach 3,291 by 2046. The structure is 115 ft (35.1 m) long and 41 ft wide. If it were closed, the detour would be 19.3 mi (31 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 | 8 Very Good | No problems noted. |
| 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 Westside Road over Mill Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is Westside Road over Mill Creek 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 October 2024.
How much traffic does Westside Road over Mill Creek carry?
About 3,200 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is Westside Road over Mill Creek?
The structure is 115 ft (35.1 m) long with a longest span of 46 ft (14 m) and a deck 41 ft wide.
Who owns Westside Road over Mill Creek?
It is owned by the County Highway Agency.