ACR Y TCASII RA WITH ACR X; EVASIVE ACTION CLB. VISUAL SEPARATION IN USE.

Narrative

ACR X ON APCH VECTOR TO RWYS 16 OR 17 SLC INTL OVER HILL AFB; UT; 11000 FT MSL; ACR Y 020 DEG VECTOR AT 11000 FT MSL. GOT TCASII ALERT AT 11 O'CLOCK 5 NM 900 FT SEPARATION. AT 2 NM SEPARATION AND 300 FT VERT SEPARATION GOT TCASII RA TO CLB. INITIATED MANUAL CLB TO APPROX 12200 FT MSL. PASSED DIRECTLY UNDER US. SLC DEP HAD ISSUED R TURN TO 090 DEGS AND NO ALT CHANGE IN RESPONSE TO INQUIRY TO TCASII ALERT. AT 2 NM WE CALLED TALLY-HO. SLC DEP RESPONDED WITH MAINTAIN VISUAL SEPARATION; HDG 090 DEGS. WE RESPONDED UNABLE AND WERE IN A CLB FOLLOWING TCASII GUIDANCE. X WAS ON DEFINITE COLLISION COURSE AS THERE WAS NO APPARENT MOVEMENT OUT THE COCKPIT WINDOW. WHEN QUESTIONED FURTHER; SLC DEP STATED THAT X HAD Y IN SIGHT; WAS SUPPOSED TO BE MAINTAINING VISUAL SEPARATION. SLC DEP WAS UNAWARE OF THIS AS PREVIOUS CTLR HAD NOT PASSED 'VISUAL SEPARATION' DURING THE HDOF. PROB WAS LACK OF COM BTWN CTLRS AND SLOW RESPONSE BY DEP CTL TO OUR REQUEST FOR POSITIVE SEPARATION. WE WERE HELD DOWN AT 11000 FT MSL FOR AN UNUSUALLY LONG TIME. ALSO VECTOR OVER OR THROUGH ARR CORRIDOR FOR S LNDGS AT SLC KEEP NBOUND DEP CLBING AND W OF THE ARR CORRIDOR FOR SLC.