T.H. Adams, D.C. Goss, American Coal Ash Association, Aurora, Colorado, USA

Changing and unpredictable air quality control regulations are having a significant impact on electric utilities in the United States. Proposed federal regulations have been rescinded and then re-implemented. Individual states have proposed their own regulations that may conflict with future federal regulations. A recent large ash spill in Tennessee has raised questions about coal combustion product (CCP) safety, potentially affecting many years of successful beneficial use. The current regulatory uncertainty offers a number of challenges to CCP producers and end users.