Underground drill rig and systems and methods of using same

A drill rig having a longitudinal drilling axis, a front portion, and a rear portion, the drill rig comprising:

• a feedframe aligned with the longitudinal drilling axis;
• a first head assembly coupled to the feedframe and configured to rotate a drill string;
• a rod holder proximate the front portion of the drill rig and configured to grip an outer surface of a first drill string component of the drill string;
• a second head assembly that is movable on the feedframe along the longitudinal axis, the second head assembly comprising:
• a powered water swivel assembly comprising:
• a spindle having an interior bore;
• a drill rod connector at a first end of the spindle;
• a motor that is configured to rotate the spindle;
• a clutch configured to disengage the motor from the spindle;
• a gearbox that couples the motor to the spindle;
• and
• a water swivel that is configured to provide drilling fluid to the interior bore of the spindle;
• and
• an actuator configured to move at least a portion of the second head assembly between a first position in which the powered water swivel assembly is aligned with the longitudinal drilling axis, and a second position in which the overshot loading assembly is aligned with the longitudinal drilling axis.