ZMP controller lost separation between 2 climbing aircraft.

Attributes
ACN	579300
Time
Date	200304
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : esc.airport
State Reference	MI
Altitude	msl single value : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp.artcc
Operator	common carrier : air carrier
Make Model Name	SF 340A
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zmp.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Experience	controller non radar : 12 controller radar : 12 controller time certified in position1 : 10 controller time certified in position2 : 5
ASRS Report	579300
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 27000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

The SF34 was climbing to FL190 and I climbed the E145 underneath and behind him by about 15 mi. To 160OO ft. I did not realize the type aircraft that the E145 was. I assumed it was an SW4 or similar.

Original NASA ASRS Text

Title: ZMP CTLR LOST SEPARATION BTWN 2 CLBING ACFT.

Narrative: THE SF34 WAS CLBING TO FL190 AND I CLBED THE E145 UNDERNEATH AND BEHIND HIM BY ABOUT 15 MI. TO 160OO FT. I DID NOT REALIZE THE TYPE ACFT THAT THE E145 WAS. I ASSUMED IT WAS AN SW4 OR SIMILAR.

Data retrieved from NASA's ASRS site as of July 2007 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.