EB 4-SB 680 Conn over Grayson Creek
PoorContra Costa County, California · 04-CC-680-20.88 · Structure no. 28 0180K
- Built
- 2005
- 20 years old
- Condition
- Poor
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 344 ft
- 8 main spans
- Daily traffic
- 28,700
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
EB 4-SB 680 Conn over Grayson Creek is a concrete continuous slab carrying EB 4-SB 680 Conn over Grayson Creek 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 28,700 vehicles a day, roughly 5% of them trucks, projected to reach 33,945 by 2045. The structure is 344 ft (104.8 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was EB 4-SB 680 Conn over Grayson Creek built?
It was built in 2005, making it 20 years old in 2025.
What condition is EB 4-SB 680 Conn over Grayson Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.
How much traffic does EB 4-SB 680 Conn over Grayson Creek carry?
About 28,700 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is EB 4-SB 680 Conn over Grayson Creek?
The structure is 344 ft (104.8 m) long with a longest span of 46 ft (13.9 m) and a deck 30 ft wide.
Who owns EB 4-SB 680 Conn over Grayson Creek?
It is owned by the State Highway Agency.