P80 TRACON controller reported that airspace structure resulted in an airborne conflict.

Attributes
ACN	1702924
Time
Date	201911
Local Time Of Day	1801-2400
Place
Locale Reference	P80.TRACON
State Reference	OR
Environment
Light	Night
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	None
Person 1
Function	Departure Instructor
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 10
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

Narrative:

Aircraft X departed pdx heading 280 climbing to 070. A 1200 code indicating 015 was 5.2 miles west-southwest of pdx northbound. As soon as aircraft X contacted my trainee; I advised him to turn aircraft X to avoid the VFR. I don't understand how an aircraft can be right in the way of pdx departures not talking to ATC. The class C airspace is outdated. The departure needed to be turned immediately after takeoff to avoid a non-participating aircraft.the floor on the outer class C airspace needs to be lowered to below 010 and extensions need to be designed to protect aircraft landing and departing pdx.

Original NASA ASRS Text

Title: P80 TRACON Controller reported that airspace structure resulted in an airborne conflict.

Narrative: Aircraft X departed PDX heading 280 climbing to 070. A 1200 code indicating 015 was 5.2 miles west-southwest of PDX northbound. As soon as Aircraft X contacted my trainee; I advised him to turn Aircraft X to avoid the VFR. I don't understand how an aircraft can be right in the way of PDX departures not talking to ATC. The Class C airspace is outdated. The departure needed to be turned immediately after takeoff to avoid a non-participating aircraft.The floor on the outer Class C airspace needs to be lowered to below 010 and extensions need to be designed to protect aircraft landing and departing PDX.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.