SR 20 EXTENSION
Carrying SR 20 EXTENSION over FRIDAY HBR-SAN JUAN CHAN
NE END SAN JUAN ISL, San Juan, Washington
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SR 20 EXTENSION
The SR 20 EXTENSION bridge in San Juan, Washington carries SR 20 EXTENSION over FRIDAY HBR-SAN JUAN CHAN. It was built in 2005, making it 21 years old today. The structure is built primarily of steel and spans 1 section, stretching 32.0 meters (105 feet) end to end. Daily traffic averages 2,587 vehicles, placing it in the moderately-trafficked tier of Washington bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 16.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SR 20 EXTENSION 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 How the historical reference is calculated.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
- 2005
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 32.0 m (105 ft)
- Deck Width
- 7.3 m (24 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 2,587 vehicles/day
- Structure Number
- 0016737A0000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether SR 20 EXTENSION 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 SR 20 EXTENSION against other structures in San Juan 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 20 EXTENSION?
SR 20 EXTENSION in San Juan, Washington has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is SR 20 EXTENSION inspected?
SR 20 EXTENSION'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 2,587 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SR 20 EXTENSION is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SR 20 EXTENSION?
SR 20 EXTENSION has an NBI inventory load rating of 16.3 metric tons.
Who is responsible for maintaining SR 20 EXTENSION?
SR 20 EXTENSION is owned and maintained by State Highway Agency.
How old is SR 20 EXTENSION and does age affect safety?
SR 20 EXTENSION was built in 2005, making it 21 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.