Big Allis
Big Allis, formally known as Ravenswood No. 3, is a giant electric power generator originally commissioned by Consolidated Edison Company (ConEd) and built by the Allis-Chalmers Corporation in 1965. Currently owned by Transcanada Corp., it is located on 36th Avenue and Vernon Boulevard in western Queens, New York. During 1963, Allis-Chalmers announced that ConEd had ordered the "world’s first MILLION-KILOWATT unit...big enough to serve 3,000,000 people." This sheer scale helped the plant become popularly known as "Big Allis". At the time of its installation, it was the world's largest energy generating facility. It is located on the Ravenswood site, consisting of Units 1, 2, 3 and 4, as well as several small Gas Turbines (GTs), and an oil depot. The site overall produces about 2,500 MW, or approximately 20% of New York City's current energy needs. The current installed capacity of Big Allis is around 980 MW. The Ravenswood, Queens site also includes a steam generation plant consisting of four B&W boilers, commonly known as "The A House", currently owned and run by Con Edison, which helps in the supply of steam to the Manhattan steam system when needed, via a tunnel crossing under the East River. Ravenswood was owned by Con Ed from the time it was built until 1999, when due to deregulation, Con Ed was forced to sell its in-city generating capacity. KeySpan bought the site for $600 million US dollars. In 2007, KeySpan merged with National Grid. Because of the possibility to influence in-city electrical costs due to National Grid's significant upstate electrical distribution, the New York State Public Service Commission forced National Grid to sell the site. In 2008, TransCanada Corp, based in Calgary, AB, Canada, bought the site for $2.9 billion US dollars.

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