MONTGOMERY DR
Carrying MONTGOMERY DR over SANTA ROSA CREEK
PIERCE ST & SOTOYOME DR, Sonoma, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MONTGOMERY DR
The MONTGOMERY DR bridge in Sonoma, California carries MONTGOMERY DR over SANTA ROSA CREEK. It was built in 1906, making it 120 years old today. It was last reconstructed in 1948, extending its service life. The structure is built primarily of steel and spans 4 sections, stretching 46.0 meters (151 feet) end to end. Daily traffic averages 8,600 vehicles, placing it in the moderately-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 6/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 28.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MONTGOMERY DR 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 How the historical reference is calculated.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
- 1906
- Last Reconstructed
- 1948
- Material
- Steel
- Number of Spans
- 4
- Structure Length
- 46.0 m (151 ft)
- Deck Width
- 11.0 m (36 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 8,600 vehicles/day
- Structure Number
- 20C0170
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • 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
This page shows what the last federal inspection recorded, not whether MONTGOMERY DR 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 MONTGOMERY DR against other structures in Sonoma 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 MONTGOMERY DR?
MONTGOMERY DR in Sonoma, California has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is MONTGOMERY DR inspected?
MONTGOMERY DR'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 8,600 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MONTGOMERY DR is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for MONTGOMERY DR?
MONTGOMERY DR has an NBI inventory load rating of 28.2 metric tons.
Who is responsible for maintaining MONTGOMERY DR?
MONTGOMERY DR is owned and maintained by City/Municipal Highway Agency.
How old is MONTGOMERY DR and does age affect safety?
MONTGOMERY DR was built in 1906, making it 120 years old and last reconstructed in 1948.
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.