Regulatory Affairs

On January 1, 2015, the Ontario Power Authority (OPA) merged with the Independent Electricity System Operator (IESO) to create a new organization that will combine the OPA and IESO mandates.

While information from this site will continue to be available, updates and changes will be posted at www.ieso.ca. Links will be made available at that time.


The former OPA was an active participant in many Ontario Energy Board proceedings that are significant to it in the development and evolution of the electricity sector in Ontario. Posted here are regulatory documents relevant to the former OPA.

2014 Expenditure and Revenue Requirement Submissions - EB-2013-0326
Full submission for 2014 submissions to the Ontario Energy Board.

2011 Expenditure and Revenue Requirement Submissions - EB-2010-0279
Full submission for 2011 submissions to the Ontario Energy Board.

2010 Expenditure and Revenue Requirement Submissions - EB-2009-0347
Full submission for 2010 submissions to the Ontario Energy Board.

2009 Expenditure and Revenue Requirement Submissions - EB-2008-0312
Full submission for 2009 submissions to the Ontario Energy Board.