The refurbishment and restart of all four CANDU reactors at Bruce A may be Ontario's most significant and complex power generation project since the first phase of the Bruce Nuclear Generating Station was built more than 30 years ago. Units 1 and 2 are expected to be synchronized in 2011 and return to commercial service by early 2012, joining Units 3 and 4, which restarted in 2004 and 2003 respectively. POWER visited Bruce A in April to witness the project's progress.