When a manually operated hoist is used, a qualified hoistman shall remain within hearing of the telephone or signal device at all times while any person is underground.
053-3 Wyo. Code R. § 57.19055
When a manually operated hoist is used, a qualified hoistman shall remain within hearing of the telephone or signal device at all times while any person is underground.
053-3 Wyo. Code R. § 57.19055