Architecture

Architect: W. G. Milne – A. Dale and Associates.

Contractor: General – Poole Construction Co.; Structural – Ricketts, Evers and Associates.

Electrical and Mechanical: Reid, Crowther and Partners Ltd.

Original cost: $3.5 million in 1968.

Original owners: Husky Oil Limited and Marathon Realty as part of the Palliser Square redevelopment.

Construction materials: Concrete and steel.

Original interior details: From it’s start, the Calgary Tower featured full 360 degree panoramic views from the restaurant and observation levels. The restaurant’s revolving floor had a capacity for up to 200 guests and the original observation deck had a capacity for 250. The Upper Deck section was complete with a cocktail lounge and snack bar. One unprecedented feature for its time was the continual pour of concrete using a relatively new slip-forming construction technique. Pouring began May 15, 1967 and was completed 24 days later. The record pour in one 24-hour period was 39 feet. The Tower was designed to withstand the elements (climate, high winds, shock, etc.). Although Calgary is not an earthquake zone, this structure was the first in the Western provinces designed to withstand earthquakes. On a windy day the Tower can, and will, sway up to 16.5 centimetres or 7.5 inches and can withstand winds up to 161 km/hr.