S56 controller reported near midair collision between B737 arrival to slc and glider at 11000 ft.

Attributes
ACN	621472
Time
Date	200406
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : ffu.vortac
State Reference	UT
Altitude	msl single value : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : s56.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : s56.tracon
Operator	general aviation : personal
Make Model Name	Sail Plane
Operating Under FAR Part	Part 91
Flight Phase	climbout : vacating altitude climbout other descent : vacating altitude descent other
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 4.5 controller time certified in position1 : 2
ASRS Report	6217472
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 150 vertical : 30
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was working the jordan radar sector (salt lake city TRACON) and had cleared aircraft X for a visual approach to runway 34R. At 11000 ft he reported taking evasive action to miss a glider and reported an near midair collision. I never observed any traffic in his vicinity. The area is approximately 8 mi from a known glider area, where there is a 'glider box' for gliders to climb/descend through class B airspace.

Original NASA ASRS Text

Title: S56 CTLR RPTED NMAC BTWN B737 ARR TO SLC AND GLIDER AT 11000 FT.

Narrative: I WAS WORKING THE JORDAN RADAR SECTOR (SALT LAKE CITY TRACON) AND HAD CLRED ACFT X FOR A VISUAL APCH TO RWY 34R. AT 11000 FT HE RPTED TAKING EVASIVE ACTION TO MISS A GLIDER AND RPTED AN NMAC. I NEVER OBSERVED ANY TFC IN HIS VICINITY. THE AREA IS APPROX 8 MI FROM A KNOWN GLIDER AREA, WHERE THERE IS A 'GLIDER BOX' FOR GLIDERS TO CLB/DSND THROUGH CLASS B AIRSPACE.

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.