INTERSTATE 680
Carrying INTERSTATE 680 over LAS TRAMPAS CREEK
04-CC-680-13.72-WLC, Contra Costa, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: INTERSTATE 680
The INTERSTATE 680 bridge in Contra Costa, California carries INTERSTATE 680 over LAS TRAMPAS CREEK. It was built in 1960, making it 66 years old today. It was last reconstructed in 1994, extending its service life. The structure is built primarily of concrete continuous and spans 3 sections, stretching 55.6 meters (182 feet) end to end. Daily traffic averages 195,300 vehicles, placing it in the heavily-trafficked tier of California bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 7/9, substructure at 7/9. 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 27.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How INTERSTATE 680 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 How the historical reference is calculated.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
- 1960
- Last Reconstructed
- 1994
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 55.6 m (182 ft)
- Deck Width
- 61.2 m (201 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 195,300 vehicles/day
- Structure Number
- 28 0162
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
How to read this record
INTERSTATE 680 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 INTERSTATE 680 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 INTERSTATE 680?
INTERSTATE 680 in Contra Costa, California has a deck rating of 4/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is INTERSTATE 680 inspected?
INTERSTATE 680'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 195,300 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. INTERSTATE 680 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 INTERSTATE 680?
INTERSTATE 680 has an NBI inventory load rating of 27.2 metric tons.
Who is responsible for maintaining INTERSTATE 680?
INTERSTATE 680 is owned and maintained by State Highway Agency.
How old is INTERSTATE 680 and does age affect safety?
INTERSTATE 680 was built in 1960, making it 66 years old and last reconstructed in 1994.
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.