DUNSTONE DRIVE
Carrying DUNSTONE DRIVE over WILSON CREEK
N OF LA PORTE RD, Butte, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: DUNSTONE DRIVE
The DUNSTONE DRIVE bridge in Butte, California carries DUNSTONE DRIVE over WILSON CREEK. It was built in 1970, making it 56 years old today. It was last reconstructed in 2015, extending its service life. The structure is built primarily of steel and spans 4 sections, stretching 9.1 meters (30 feet) end to end. Daily traffic averages 3,000 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. 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 DUNSTONE DRIVE 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 How the historical reference is calculated.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
- 1970
- Last Reconstructed
- 2015
- Material
- Steel
- Number of Spans
- 4
- Structure Length
- 9.1 m (30 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 3,000 vehicles/day
- Structure Number
- 12C0360
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether DUNSTONE DRIVE is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare DUNSTONE DRIVE against other structures in Butte 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 DUNSTONE DRIVE?
DUNSTONE DRIVE in Butte, California on the FHWA's 0–9 scale.
How often is DUNSTONE DRIVE inspected?
DUNSTONE DRIVE'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 3,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. DUNSTONE DRIVE is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for DUNSTONE DRIVE?
DUNSTONE DRIVE has an NBI inventory load rating of 24.3 metric tons.
Who is responsible for maintaining DUNSTONE DRIVE?
DUNSTONE DRIVE is owned and maintained by County Highway Agency.
How old is DUNSTONE DRIVE and does age affect safety?
DUNSTONE DRIVE was built in 1970, making it 56 years old and last reconstructed in 2015.
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.