Bollinger Canyon over East Branch Alamo Creek
GoodContra Costa County, California · Just S of Harcourt RD · Structure no. 28C0235
- Built
- 2006
- 19 years old
- Condition
- Good
- inspected March 2024
- Type
- Arch - Deck
- Steel
- Length
- 31 ft
- 1 main span
- Daily traffic
- 5,000
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Bollinger Canyon over East Branch Alamo Creek is a steel arch - deck carrying Bollinger Canyon over East Branch Alamo Creek in Contra Costa County, California. It was built in 2006, so it is 19 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 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 6,456 by 2042. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 3.7 mi (6 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 |
|---|---|---|
| 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 Bollinger Canyon over East Branch Alamo Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is Bollinger Canyon over East Branch Alamo 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 March 2024.
How much traffic does Bollinger Canyon over East Branch Alamo Creek carry?
About 5,000 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is Bollinger Canyon over East Branch Alamo Creek?
The structure is 31 ft (9.5 m) long with a longest span of 31 ft (9.5 m).
Who owns Bollinger Canyon over East Branch Alamo Creek?
It is owned by the City or Municipal Highway Agency.