Widebody; Low Wing; 3 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
Situational Awareness; Workload
ATC Issue All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance
Human Factors
I had just gotten back into the room from a break and told to get BEAR/HART. I walk over and it is evident there are a lot of airplanes in the sector. Most are VFR on HART; but there were several aircraft IFR to SLC South flow and we were just turning to go North flow. I sat down and immediately plugged into the handoff side and signed into the keyboard to help. There were several aircraft requesting release off HIF and OGD; lots of VFRs; etc. I started doing coordination for the IFR departures without a briefing or anything trying to help the saturation. By the time the Controller noticed Aircraft X; (they were issuing traffic alerts to two VFR aircraft at the time) it appears that Aircraft X leveled at FL104 in the FL110 MVA. They immediately climbed the aircraft back up; but did not use Low Altitude Alert phraseology.We are having a problem currently; especially with certain Supervisors; on sector awareness and noticing saturation. There have been numerous times I've heard people talking about positions not being split; etc. I'm not sure if the Controller asked for it or not in this situation; and honestly it wouldn't have helped (listening to the replay Aircraft X read back FL110); but we need more awareness from our Supervisors/CIC's to notice when VFR sectors are getting busy and split them off so there is more awareness all around on the sectors. When I walked into the room and to the desk for assignment; the Supervisor was standing around not paying close attention to a particular sector and obviously didn't notice how busy BEAR/HART was because when I got over there the Controller was in no spot to give up the position; they needed help.
Salt Lake TRACON Controller reported traffic volume problems that led to an oversight of an aircraft leveling off below a Minimum Vectoring Altitude.