I 580 EB over Castro Street
PoorContra Costa County, California · 04-CC-580-R5.11-RCH · Structure no. 28 0290L
- Built
- 1988
- 37 years old
- Condition
- Poor
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 367 ft
- 3 main spans
- Daily traffic
- 27,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
I 580 EB over Castro Street is a prestressed concrete continuous box beam or girders - multiple carrying I 580 EB over Castro Street in Contra Costa County, California. It was built in 1988, so it is 37 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 27,500 vehicles a day, roughly 5% of them trucks, projected to reach 52,145 by 2046. The structure is 367 ft (111.9 m) long and 67 ft wide. If it were closed, the detour would be 44.7 mi (72 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 580 EB over Castro Street built?
It was built in 1988, making it 37 years old in 2025.
What condition is I 580 EB over Castro Street 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 March 2024.
How much traffic does I 580 EB over Castro Street carry?
About 27,500 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is I 580 EB over Castro Street?
The structure is 367 ft (111.9 m) long with a longest span of 176 ft (53.6 m) and a deck 67 ft wide.
Who owns I 580 EB over Castro Street?
It is owned by the State Highway Agency.