Bollinger Canyon over Main Branch Alamo Creek
FairContra Costa County, California · 1 MI E Crow Canyon RD · Structure no. 28C0240R
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 138 ft
- 1 main span
- Daily traffic
- 5,000
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Bollinger Canyon over Main Branch Alamo Creek is a prestressed concrete box beam or girders - multiple carrying Bollinger Canyon over Main 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 6,994 by 2042. The structure is 138 ft (42.1 m) long and 56 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Bollinger Canyon over Main Branch Alamo Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is Bollinger Canyon over Main Branch Alamo Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.
How much traffic does Bollinger Canyon over Main Branch Alamo Creek carry?
About 5,000 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is Bollinger Canyon over Main Branch Alamo Creek?
The structure is 138 ft (42.1 m) long with a longest span of 134 ft (40.9 m) and a deck 56 ft wide.
Who owns Bollinger Canyon over Main Branch Alamo Creek?
It is owned by the City or Municipal Highway Agency.