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The Bow

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The Bow
EnCana and Cenovus Headquarters


Structure in General

existing [completed]
trussed tube
curtain wall


commercial office
shop(s) parking


  • Retail and cultural space is approx. 200,000 square feet.
  • A typical floor is approximately 38,564 square feet.
  • 400,000 metres of land were excavated for the project.
  • Substantial glazed areas lead to a reduction in the need for artificial lighting.
  • The building uses a raised-floor displacement ventilation system.
  • 39,000 tonnes of steel and 900,000 square feet of glass were used in construction.
  • The shape and position of the tower allows for views, maximum sunshine, and also deals effectively with summer and winter wind patterns.
  • The building site area is 188,300 square feet and covers most of one full city block.
  • The EnCana headquarters provides space for 3,200 employees, once housed in five buildings.
  • Total cost for the project, on announcement day, was estimated to be between $850 million and $1 billion.
  • The advanced design uses glass and steel engineering that makes the building 30% lighter than any its size.
  • Canada's first trussed-tube skyscraper similar to John Hancock Center and One Maritime Plaza.
  • The steel-framed structure is crescent-shaped.
  • The solar heat collected in the atrium is redistributed, in winter by means of extraction, in summer using heat exchange. Redistribution reduces the load on the mechanical systems.
  • The building's shape deflects the prevailing winds, thus allowing for a lighter structure.
  • Tallest building in Canada west of Toronto, and the third tallest in Canada on completion.
  • Canada's second largest building in floor space after First Canadian Place in downtown Toronto.
  • The building is named after the river that runs beside Calgary's downtown.
  • The intersecting triangular sections of the south atrium wall form the largest diagrid of architecturally exposed structural steel (AESS) in the world.
  • At levels 24, 42 and 54 there are three six-storey-high sky gardens - indoor park-like levels with natural vegetation - with seating and meeting spaces serviced by express elevators.
  • The foundations are 3 metres thick and contain 14,000 cubic metres of concrete.
  • The raft slab for the foundation took 39.5 hours to pour and required 94 concrete trucks, making it the largest single concrete pour in Canadian construction history.

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More Information


500 Centre Street Southeast
T2P 2S5

Technical Data

778.87 ft

Involved Companies

Foster + Partners
Zeidler Partnership Architects

Jaume Plensa

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Features & Amenities

  • One of the city's famous buildings
  • City landmark
  • Bicycle storage is available
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