West Virginia governor Earl Ray Tomblin spoke before the WVCA crowd.
West Virginia attorney general Patrick Morrisey discusses the work of the agency.
EPA was the topic of discussion for attorney Dave Flannery.
US Mine Safety and Health Administration assistant secretary Joseph Main.
National Institute for Occupational Safety and Health director Dr Jeffrey Kohler.
The crowds have departed from Charleston for this year's WVCA symposium, but will return in early 2014.