State Route 242 over Holbrook Channel
GoodContra Costa County, California · 04-CC-242-R2.65-CND · Structure no. 28 0147
- Built
- 1978
- 47 years old, rebuilt 2000
- Condition
- Good
- inspected January 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 100,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 242 over Holbrook Channel is a prestressed concrete slab carrying State Route 242 over Holbrook Channel in Contra Costa County, California. It was built in 1978 and reconstructed in 2000, so it is 47 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 100,000 vehicles a day, roughly 5% of them trucks, projected to reach 166,507 by 2042. The structure is 51 ft (15.5 m) long and 191 ft wide.
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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 242 over Holbrook Channel built?
It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2000.
What condition is State Route 242 over Holbrook Channel 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 2024.
How much traffic does State Route 242 over Holbrook Channel carry?
About 100,000 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is State Route 242 over Holbrook Channel?
The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 191 ft wide.
Who owns State Route 242 over Holbrook Channel?
It is owned by the State Highway Agency.