JERSEY ISLAND RD
Carrying JERSEY ISLAND RD over DUTCH SLOUGH
1.5 MILES N OF CYPRESS RD, Contra Costa, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: JERSEY ISLAND RD
The JERSEY ISLAND RD bridge in Contra Costa, California carries JERSEY ISLAND RD over DUTCH SLOUGH. It was built in 1949, making it 77 years old today. It was last reconstructed in 1967, extending its service life. The structure is built primarily of wood or timber and spans 32 sections, stretching 192.0 meters (630 feet) end to end. Daily traffic averages 188 vehicles, placing it in the lower-traffic tier of California bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 5/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 24.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How JERSEY ISLAND RD compares
Live comparison across California.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1949
- Last Reconstructed
- 1967
- Material
- Wood or Timber
- Number of Spans
- 32
- Structure Length
- 192.0 m (630 ft)
- Deck Width
- 7.9 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 188 vehicles/day
- Structure Number
- 28C0405
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
JERSEY ISLAND RD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare JERSEY ISLAND RD against other structures in Contra Costa and across California. California bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for JERSEY ISLAND RD?
JERSEY ISLAND RD in Contra Costa, California has a deck rating of 6/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is JERSEY ISLAND RD inspected?
JERSEY ISLAND RD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 188 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. JERSEY ISLAND RD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for JERSEY ISLAND RD?
JERSEY ISLAND RD has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining JERSEY ISLAND RD?
JERSEY ISLAND RD is owned and maintained by County Highway Agency.
How old is JERSEY ISLAND RD and does age affect safety?
JERSEY ISLAND RD was built in 1949, making it 77 years old and last reconstructed in 1967.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.