[2] In 2008, the plant obtained regulatory approval for an ozone generation system to control zebra mussel fouling of service water intake pipes.

[3] As of 2007, Lennox represented 50% of Ontario installed generation capacity east of the Toronto zone.

When operating at full capacity, the plant claims to be the largest user of natural gas in Ontario.

[7] The Lennox Generating Station consists of: In 2012, Ontario's government announced an additional 900-megawatt TransCanada Energy natural gas plant (ultimately called the Napanee Generation Station) to be built at the Lennox Generating Station site; the project was originally planned for Oakville, Ontario[10] but the location was changed in 2010 as part of a controversial government decision to relocate it and another gas-fired power plant.

[11][12] While estimates vary, the additional costs to transport natural gas eastward and generated power westward are expected to represent hundreds of millions of dollars over the lifetime of the new generation plant;[13] one report claims $675 million.