Denver TRACON controller reported of a SID that is going away with metroplex; but recommends it goes...

Attributes
ACN	1390820
Time
Date	201609
Local Time Of Day	1201-1800
Place
Locale Reference	D01.TRACON
State Reference	CO
Environment
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	STAR PUFFR4
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Climb
Route In Use	SID CONNR3
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 3
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

Aircraft X was descending into apa via the puffr STAR runway 17L transition. Den tower accepted the point-out through their airspace. Den tower launched aircraft Y west on the connr SID. Aircraft X and aircraft Y were on converging courses and were going to lose separation. I had a feeling this was going to happen so I stopped aircraft X at 11;000 to maintain separation. Had I not done this; the two aircraft would have merged and it could have been tragic.the puffr STAR is going away with metroplex changes. I recommend that we cease using this STAR immediately. I have seen eight to ten losses or near losses with this procedure in the last three years. We do not need to run satellite airplanes through den tower's airspace. We need to do something before we have a tragedy.

Original NASA ASRS Text

Title: Denver TRACON Controller reported of a SID that is going away with metroplex; but recommends it goes away sooner. He has seen eight to ten losses of separation with the SID and arrivals into the Denver area.

Narrative: Aircraft X was descending into APA via the PUFFR STAR Runway 17L transition. DEN tower accepted the point-out through their airspace. DEN tower launched Aircraft Y west on the CONNR SID. Aircraft X and Aircraft Y were on converging courses and were going to lose separation. I had a feeling this was going to happen so I stopped Aircraft X at 11;000 to maintain separation. Had I not done this; the two aircraft would have merged and it could have been tragic.The PUFFR STAR is going away with metroplex changes. I recommend that we cease using this STAR immediately. I have seen eight to ten losses or near losses with this procedure in the last three years. We do not need to run satellite airplanes through DEN tower's airspace. We need to do something before we have a tragedy.

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.

Denver TRACON controller reported of a SID that is going away with metroplex; but recommends it goes away sooner. He has seen eight to ten losses of separation with the SID and arrivals into the denver area.