M98 controller failed to note the type aircraft involved when establishing the final approach sequen...

Narrative:

I had a complex situation developing with the sequencing of the air carrier Y [aircraft] ([small piston aircraft] mostly) and an A319 with winds at 40 KTS out of the south. I had an air carrier Y going straight to approach end of 12L that I had to coordinate with tower and then put the A319 in behind him and in front of air carrier Y1. I had air carrier Y2 as my #4 aircraft following air carrier Y1. I did not realize that air carrier Y2 was one of the few SW4's that fly into msp. I created an unintentional overtake especially because air carrier Y1 was headed into the wind. We recently had an airspace/procedure change where the 'turboprops' now come in at a lower altitude and mix with the [piston] air carrier Y's. The old procedures when they came to me at 7;000 ft; was a helpful clue indicating it was a turboprop air carrier Y and not a [piston aircraft] that comes to us at 4;000 ft. Go back to putting the turboprops at the higher altitudes not mixing them with the slow props.

Original NASA ASRS Text

Title: M98 Controller failed to note the type aircraft involved when establishing the final approach sequence; resulting in an overtake situation. The reporter listing a recent procedural change as contributing factor.

Narrative: I had a complex situation developing with the sequencing of the Air Carrier Y [aircraft] ([small piston aircraft] mostly) and an A319 with winds at 40 KTS out of the south. I had an Air Carrier Y going straight to approach end of 12L that I had to coordinate with Tower and then put the A319 in behind him and in front of Air Carrier Y1. I had Air Carrier Y2 as my #4 aircraft following Air Carrier Y1. I did not realize that Air Carrier Y2 was one of the few SW4's that fly into MSP. I created an unintentional overtake especially because Air Carrier Y1 was headed into the wind. We recently had an airspace/procedure change where the 'turboprops' now come in at a lower altitude and mix with the [piston] Air Carrier Y's. The old procedures when they came to me at 7;000 FT; was a helpful clue indicating it was a turboprop Air Carrier Y and not a [piston aircraft] that comes to us at 4;000 FT. Go back to putting the turboprops at the higher altitudes not mixing them with the slow props.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1017383
Time
Date	201206
Place
Locale Reference	MSP.Airport
State Reference	MN
Aircraft 1
Make Model Name	Merlin IV A
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Beechcraft Twin Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach Departure
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

M98 controller failed to note the type aircraft involved when establishing the final approach sequence; resulting in an overtake situation. The reporter listing a recent procedural change as contributing factor.