AMERICAN CANYON RD
Carrying AMERICAN CANYON RD over AMERICAN CANYON CREEK
0.1 MI EAST OF SR 29, Napa, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: AMERICAN CANYON RD
The AMERICAN CANYON RD bridge in Napa, California carries AMERICAN CANYON RD over AMERICAN CANYON CREEK. It was built in 1940, making it 86 years old today. It was last reconstructed in 2007, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 7.9 meters (26 feet) end to end. Daily traffic averages 16,278 vehicles, placing it in the heavily-trafficked tier of California bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure 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 17.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How AMERICAN CANYON 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 How the historical reference is calculated.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
- 1940
- Last Reconstructed
- 2007
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 7.9 m (26 ft)
- Deck Width
- 26.8 m (88 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 16,278 vehicles/day
- Structure Number
- 21C0038
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether AMERICAN CANYON RD 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 AMERICAN CANYON RD against other structures in Napa 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 AMERICAN CANYON RD?
AMERICAN CANYON RD in Napa, California has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is AMERICAN CANYON RD inspected?
AMERICAN CANYON 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 16,278 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. AMERICAN CANYON RD 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 AMERICAN CANYON RD?
AMERICAN CANYON RD has an NBI inventory load rating of 17.2 metric tons.
Who is responsible for maintaining AMERICAN CANYON RD?
AMERICAN CANYON RD is owned and maintained by City/Municipal Highway Agency.
How old is AMERICAN CANYON RD and does age affect safety?
AMERICAN CANYON RD was built in 1940, making it 86 years old and last reconstructed in 2007.
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.