The Bow will eventually house all of EnCana's Calgary-based employees, presently located at five different sites throughout the downtown core. With an estimated 158,000-square-metre total office space, the office complex is expected to be the city's largest. The building, at 58 stories, will also be the tallest office tower in Canada outside of Toronto.
Groundbreaking took place on June 13, 2007, with work starting on both sides of 6th Avenue S between Centre Street and 1st Street E. Sixth Avenue is being excavated, after closure of the block and the six level underground parkade will be constructed on a two block area, on both north and south side of 6th Avenue.
The concrete foundation was continuously poured over 36 hours on May 11 and 12, 2008, being the largest of its kind in Canada, and third largest in the world after the Howard Hughes Center in Los Angeles and the Sama Tower (Al Durrah Tower) in Dubai. Some 14,000 cubic metres (490,000 cu ft) of concrete filled the 2,787 square metres (30,000 sq ft) foundation.
Erection of the above ground steel superstructure began in October 2008 with the installation of the first of two Favelle Favco heavy lift tower cranes.
Construction work is currently on-going, with an estimated completion in 2011.
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