TORONTO - The Opposition is demanding to know why construction is continuing on a Mississauga power plant that the Liberal government promised to shut down just before the Oct. 6 election.

Progressive Conservative Leader Tim Hudak says crews yesterday delivered the huge generator to the site of the Mississauga generating station that was supposed to be shut down.

Premier Dalton McGuinty reversed his position in the middle of the election campaign and announced the plant would be built elsewhere, but Hudak says he always doubted that commitment.

The Tory leader wonders if McGuinty is breaking a campaign promise less than three weeks after election day.

New Energy Minister Chris Bentley issued a statement saying the government will find another location for the plant, but he was not available to explain why construction is continuing.

Hudak and NDP Leader Andrea Horwath say they're worried about how much taxpayers will have to pay for cancelling the Mississauga gas plant and another one in Oakville, both in Liberal-held ridings.