KNOXV-BERRYESSA RD
Carrying KNOXV-BERRYESSA RD over POPE CRK.(LAKE BERRYESSA
.2 MI S/O POPE CANYON RD, Napa, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: KNOXV-BERRYESSA RD
The KNOXV-BERRYESSA RD bridge in Napa, California carries KNOXV-BERRYESSA RD over POPE CRK.(LAKE BERRYESSA. It was built in 1957, making it 69 years old today. It was last reconstructed in 1958, extending its service life. The structure is built primarily of steel and spans 4 sections, stretching 214.4 meters (703 feet) end to end. Daily traffic averages 3,570 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 a deck rating of 4/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 29.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How KNOXV-BERRYESSA 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 How the historical reference is calculated.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
- 1957
- Last Reconstructed
- 1958
- Material
- Steel
- Number of Spans
- 4
- Structure Length
- 214.4 m (703 ft)
- Deck Width
- 9.0 m (30 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 3,570 vehicles/day
- Structure Number
- 21C0013
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
How to read this record
KNOXV-BERRYESSA 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 KNOXV-BERRYESSA 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 KNOXV-BERRYESSA RD?
KNOXV-BERRYESSA RD in Napa, 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 KNOXV-BERRYESSA RD inspected?
KNOXV-BERRYESSA 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 3,570 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. KNOXV-BERRYESSA 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 KNOXV-BERRYESSA RD?
KNOXV-BERRYESSA RD has an NBI inventory load rating of 29.2 metric tons.
Who is responsible for maintaining KNOXV-BERRYESSA RD?
KNOXV-BERRYESSA RD is owned and maintained by County Highway Agency.
How old is KNOXV-BERRYESSA RD and does age affect safety?
KNOXV-BERRYESSA RD was built in 1957, making it 69 years old and last reconstructed in 1958.
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.