Interstate 880 over Patterson Slough
PoorAlameda County, California · 04-ALA-880-11.80-FMT · Structure no. 33 0250
- Built
- 1957
- 68 years old, rebuilt 1989
- Condition
- Poor
- inspected April 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 458 ft
- 10 main spans
- Daily traffic
- 198,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 880 over Patterson Slough is a concrete continuous tee beam carrying Interstate 880 over Patterson Slough in Alameda County, California. It was built in 1957 and reconstructed in 1989, so it is 68 years old, older 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 198,000 vehicles a day, roughly 11% of them trucks, projected to reach 253,614 by 2042. The structure is 458 ft (139.6 m) long and 148 ft wide. If it were closed, the detour would be 5 mi (8 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 880 over Patterson Slough built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1989.
What condition is Interstate 880 over Patterson Slough 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 April 2023.
How much traffic does Interstate 880 over Patterson Slough carry?
About 198,000 vehicles per day (2017 count), of which roughly 11% are trucks.
How long is Interstate 880 over Patterson Slough?
The structure is 458 ft (139.6 m) long with a longest span of 48 ft (14.6 m) and a deck 148 ft wide.
Who owns Interstate 880 over Patterson Slough?
It is owned by the State Highway Agency.