PA-23 Apache/Geronimo Apache
Air Traffic Control Fully Certified
Situational Awareness; Workload
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Human Factors
Aircraft X was eastbound between MLD and OCS at 11000 ft. While busy with other arrival and overflight traffic; I mistakenly thought that Aircraft X was cleared via V4 and issued him a climb clearance at HODNI to 12000 ft. As Aircraft X was slowly climbing I realized that he was not cleared via the airway. I cleared Aircraft X via V4 to GRIPS but at that point Aircraft X had been inside a 12000 ft MVA for several minutes.
ZLC Controller reported issuing an aircraft the incorrect clearance; resulting in the aircraft flying into a higher MVA.