A Millersburg contractor is facing over half a million dollars in fines for failing to protect its roofing employees from potentially deadly falls.  According to the Department of Labor, JMH Roofing LLC was found by OSHA to have exposed workers to the hazards at four separate worksites over the course of 12 weeks.  Department of Labor officials say workers were exposed to fall hazards of up to 19 feet at worksites in Canton, Uniontown and Westlake.  OSHA conducted the inspections in March, April and June.  Offenses include roofing workers at heights greater than six feet without fall protection and allowing employees to work without properly extended ladders.