Commercial Fixed Wing
Air Traffic Control Fully Certified
Distraction; Communication Breakdown
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Human Factors
I was the Approach Controller working much busier than normal traffic with multiple practice approaches during our evening arrivals. Two aircraft were coming in from the west so I had issued Aircraft X a climb out of fly heading 120 and climb to 060. With the other traffic and communications with them including being stepped on; my scan broke down and I did not issue Aircraft X a turn as I intended to vector him to the RNAV Y 21; in time. The Local Controller/CIC noticed and said 'Hey watch that 7;000 MVA.' I immediately issued a turn to 350; when that wasn't going to work with how slow he turned (he was going 250 kts) I issued a low altitude alter with a climb to 7;000.Allow us to run simulations with busy traffic! We are a very slow facility with sporadic heavy traffic.
GTF TRACON Controller reported an aircraft turning slowly and entering an area of higher elevation; resulting in a MVA violation.