SR 529
Carrying SR 529 over SNOHOMISH RIVER
4.7 N JCT SR 529 SPUR, Snohomish, Washington
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SR 529
The SR 529 bridge in Snohomish, Washington carries SR 529 over SNOHOMISH RIVER. It was built in 1954, making it 72 years old today. The structure is built primarily of steel and spans 1 section, stretching 751.3 meters (2465 feet) end to end. Daily traffic averages 15,905 vehicles, placing it in the heavily-trafficked tier of Washington bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 4/9, substructure at 6/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order. Its NBI inventory load rating is 26.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SR 529 compares
Live comparison across Washington.
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 How the historical reference is calculated.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
- 1954
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 751.3 m (2465 ft)
- Deck Width
- 10.6 m (35 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 15,905 vehicles/day
- Structure Number
- 0004331A0000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
SR 529 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 SR 529 against other structures in Snohomish and across Washington. Washington 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 SR 529?
SR 529 in Snohomish, Washington has a deck rating of 6/9, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is SR 529 inspected?
SR 529'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 15,905 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SR 529 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 SR 529?
SR 529 has an NBI inventory load rating of 26.3 metric tons.
Who is responsible for maintaining SR 529?
SR 529 is owned and maintained by State Highway Agency.
How old is SR 529 and does age affect safety?
SR 529 was built in 1954, making it 72 years old.
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.