The BMO Tower, also known as 320 South Canal, is a 51-story, 727 feet (222 m) skyscraper in the West Loop neighborhood of Chicago, Illinois, and sits directly south of the Union Station rail terminal. When completed, it became the 24th-tallest building in Chicago, and the tallest to the west of Canal Street. The building, designed by Goettsch Partners and consulted by Magnusson Klemencic Associates, added 1,500,000 square feet (140,000 m2) of office space to the city.