MSHA Annual Refresher for Surface and Underground is a 8 hour class.  It requires prior record of training not older than 3 years.  Attendance requires a computer/device equipped with a working webcam…

MSHA Annual Refresher for Surface and Underground is a 8 hour class.  It requires prior record of training not older than 3 years.  Attendance requires a computer/device equipped with a working webcam…

MSHA Annual Refresher for Surface and Underground is a 8 hour class.  It requires prior record of training not older than 3 years.  Attendance requires a computer/device equipped with a working webcam…

MSHA Annual Refresher for Surface and Underground is a 8 hour class.  It requires prior record of training not older than 3 years.  Attendance requires a computer/device equipped with a working webcam…