20TH AVENUE WEST
Carrying 20TH AVENUE WEST over RD TO BOEING PARKING LOT
BOEING INTRCHNG, Snohomish, Washington
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 20TH AVENUE WEST
The 20TH AVENUE WEST bridge in Snohomish, Washington carries 20TH AVENUE WEST over RD TO BOEING PARKING LOT. It was built in 1969, making it 57 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 45.1 meters (148 feet) end to end. Daily traffic averages 19,626 vehicles, placing it in the heavily-trafficked tier of Washington 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 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 24.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 20TH AVENUE WEST 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 How the historical reference is calculated.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
- 1969
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 45.1 m (148 ft)
- Deck Width
- 28.2 m (93 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 19,626 vehicles/day
- Structure Number
- 085160000000000
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.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether 20TH AVENUE WEST 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 20TH AVENUE WEST 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 20TH AVENUE WEST?
20TH AVENUE WEST in Snohomish, Washington has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is 20TH AVENUE WEST inspected?
20TH AVENUE WEST'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 19,626 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 20TH AVENUE WEST 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 20TH AVENUE WEST?
20TH AVENUE WEST has an NBI inventory load rating of 24.5 metric tons.
Who is responsible for maintaining 20TH AVENUE WEST?
20TH AVENUE WEST is owned and maintained by City/Municipal Highway Agency.
How old is 20TH AVENUE WEST and does age affect safety?
20TH AVENUE WEST was built in 1969, making it 57 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.