SB 680-WB 4 Conn over Blum Road
GoodContra Costa County, California · 04-CC-680-21.50 · Structure no. 28 0172K
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected January 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 213 ft
- 4 main spans
- Daily traffic
- 14,100
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
SB 680-WB 4 Conn over Blum Road is a concrete continuous box beam or girders - multiple carrying SB 680-WB 4 Conn over Blum Road in Contra Costa County, California. It was built in 2005, so it is 20 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 14,100 vehicles a day, roughly 5% of them trucks, projected to reach 15,456 by 2043. The structure is 213 ft (65 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SB 680-WB 4 Conn over Blum Road built?
It was built in 2005, making it 20 years old in 2025.
What condition is SB 680-WB 4 Conn over Blum Road 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 2025.
How much traffic does SB 680-WB 4 Conn over Blum Road carry?
About 14,100 vehicles per day (2012 count), of which roughly 5% are trucks.
How long is SB 680-WB 4 Conn over Blum Road?
The structure is 213 ft (65 m) long with a longest span of 60 ft (18.3 m) and a deck 41 ft wide.
Who owns SB 680-WB 4 Conn over Blum Road?
It is owned by the State Highway Agency.