164TH ST SW
Carrying 164TH ST SW over SWAMP CREEK
1.0 W JCT I-5, Snohomish, Washington
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
164TH ST SW in Snohomish, Washington sits above 52% of rated Washington bridges on inventory load rating (33 t), while its 1960 build year is earlier than 84% of Snohomish's recorded-year cohort (500 bridges).
164TH ST SW in Snohomish, Washington is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1960, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure WA:087029000000000
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · HEAVY-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: 164TH ST SW
The 164TH ST SW bridge in Snohomish, Washington carries 164TH ST SW over SWAMP CREEK. It was built in 1960, making it 66 years old today. It was last reconstructed in 2003, extending its service life. The structure is built primarily of concrete and spans 2 sections, stretching 6.9 meters (23 feet) end to end. Daily traffic averages 29,286 vehicles, placing it in the heavily-trafficked tier of Washington bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How 164TH ST SW compares
Age against the county: built in 1960, earlier than 420 of Snohomish's 500 bridges with a recorded construction year (84%), against a county median build year of 1979. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Washington bridges with a recorded inventory load rating (8,455 of 8,474 rated).
164TH ST SW vs every rated Washington bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 48% higher than 52% of 8,455 bridges
rated Washington bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Snohomish inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 500 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1960
- Last Reconstructed
- 2003
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 6.9 m (23 ft)
- Deck Width
- 25.0 m (82 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 29,286 vehicles/day
- Structure Number
- 087029000000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether 164TH ST SW 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 164TH ST SW 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 164TH ST SW?
164TH ST SW in Snohomish, Washington on the FHWA's 0–9 scale.
How often is 164TH ST SW inspected?
164TH ST SW'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 29,286 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 164TH ST SW 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 164TH ST SW?
164TH ST SW has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining 164TH ST SW?
164TH ST SW is owned and maintained by County Highway Agency.
How old is 164TH ST SW and does age affect safety?
164TH ST SW was built in 1960, making it 66 years old and last reconstructed in 2003.
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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.