Somersville Road over West Antioch Creek
GoodContra Costa County, California · 0.05 MI W of "o" Street · Structure no. 28C0476
- Built
- 1992
- 33 years old
- Condition
- Good
- inspected January 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 45 ft
- 3 main spans
- Daily traffic
- 6,000
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Somersville Road over West Antioch Creek is a concrete continuous culvert carrying Somersville Road over West Antioch Creek in Contra Costa County, California. It was built in 1992, so it is 33 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 6,000 vehicles a day, roughly 5% of them trucks, projected to reach 13,259 by 2045. The structure is 45 ft (13.6 m) long and 112 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Somersville Road over West Antioch Creek built?
It was built in 1992, making it 33 years old in 2025.
What condition is Somersville Road over West Antioch 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 January 2023.
How much traffic does Somersville Road over West Antioch Creek carry?
About 6,000 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is Somersville Road over West Antioch Creek?
The structure is 45 ft (13.6 m) long with a longest span of 14 ft (4.4 m) and a deck 112 ft wide.
Who owns Somersville Road over West Antioch Creek?
It is owned by the City or Municipal Highway Agency.