SW Harbor Viaduct
Carrying SW Harbor Viaduct over SW Harr, Riv, Harb Sher
Approach Tilikum, Multnomah, Oregon
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SW Harbor Viaduct
The SW Harbor Viaduct bridge in Multnomah, Oregon carries SW Harbor Viaduct over SW Harr, Riv, Harb Sher. It was built in 2015, making it 11 years old today. The structure is built primarily of steel. Daily traffic averages 3,000 vehicles, placing it in the moderately-trafficked tier of Oregon bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. All reported major components score above the Poor range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SW Harbor Viaduct compares
Live comparison across Oregon.
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 How the historical reference is calculated.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
- 2015
- Material
- Steel
- Avg Daily Traffic
- 3,000 vehicles/day
- Structure Number
- 22259 000 00000
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 SW Harbor Viaduct 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 SW Harbor Viaduct against other structures in Multnomah and across Oregon. Oregon 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 SW Harbor Viaduct?
SW Harbor Viaduct in Multnomah, Oregon on the FHWA's 0–9 scale.
How often is SW Harbor Viaduct inspected?
SW Harbor Viaduct'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 3,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SW Harbor Viaduct is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SW Harbor Viaduct?
An inventory load rating is not recorded for SW Harbor Viaduct.
Who is responsible for maintaining SW Harbor Viaduct?
Ownership is not specified for SW Harbor Viaduct in the NBI.
How old is SW Harbor Viaduct and does age affect safety?
SW Harbor Viaduct was built in 2015, making it 11 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.