Jersey Island RD over Dutch Slough
PoorContra Costa County, California · 1.5 Miles N of Cypress RD · Structure no. 28C0405
- Built
- 1949
- 76 years old, rebuilt 1967
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 630 ft
- 32 main spans
- Daily traffic
- 188
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Jersey Island RD over Dutch Slough is a wood or timber stringer/multi-beam or girder carrying Jersey Island RD over Dutch Slough in Contra Costa County, California. It was built in 1949 and reconstructed in 1967, so it is 76 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 188 vehicles a day, roughly 24% of them trucks, projected to reach 409 by 2046. The structure is 630 ft (192 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Jersey Island RD over Dutch Slough built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1967.
What condition is Jersey Island RD over Dutch 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 August 2024.
How much traffic does Jersey Island RD over Dutch Slough carry?
About 188 vehicles per day (2015 count), of which roughly 24% are trucks.
How long is Jersey Island RD over Dutch Slough?
The structure is 630 ft (192 m) long with a longest span of 41 ft (12.6 m) and a deck 26 ft wide.
Who owns Jersey Island RD over Dutch Slough?
It is owned by the County Highway Agency.