Calgary Tower
The Calgary Tower is a 191 meter (626 feet) free standing observation tower in Downtown Calgary, Alberta, Canada. Originally called the Husky Tower, it was conceived as a joint venture between Marathon Realty Company Limited and Husky Oil as part of an urban renewal plan and to celebrate Canada's centennial of 1967. The tower was built at a cost of $3,500,000 and weighs approximately 10,900 tonnes, of which 60% is below ground. It opened to the public on June 30, 1968 as the tallest structure in Calgary, and the tallest in Canada outside of Toronto. It was renamed the Calgary Tower in 1971. The building was a founding member of the World Federation of Great Towers.

History
When Marathon Realty and Husky Oil built their new head offices in Calgary, they proposed building the tower both to honour Canada's centennial year of 1967 and to encourage urban renewal and growth of the downtown core. The structure was designed by W.G. Milne & A. Dale and Associates, and was designed to withstand earthquakes and winds of up to 161 kilometres per hour (100 mph). Construction began on February 19, 1967, and completed in 15 months at a cost of C$3.5 million. The column of the tower was built from an unprecedented continual pour of concrete. Pouring began May 15, 1967 and was completed 24 days later at an average growth of 25 feet (7.6 m) per day, a rate that was praised by industry officials as an "amazing feat of technical and physical workmanship". Upon completion, the Husky Tower stood 190.8 metres (626 ft) tall and was the tallest structure of its type in North America. It dominated the Calgary skyline, standing well over twice the height of the previous tallest structure in the city, Elveden House. Developers deliberately misled the public, claiming the tower would stand 187 metres (614 ft), in the hopes of preventing competing developers from surpassing the Husky Tower's height record. Shortly after officials in San Antonio, Texas attempted to claim the record in announcing the completion of the 190 metres (620 ft) Tower of the Americas, developers revealed the Husky Tower's true height. The Husky Tower officially opened on June 28–30, 1968, in three separate ceremonies. It had two elevators that could take visitors to the observation level in just over a minute at a cost of $1 for adults and 50 cents for children under 13. The observation level featured a lounge/restaurant called the Hitching Post. Marathon Realty acquired a controlling interest in the tower in 1970. The structure was formally renamed the Calgary Tower on November 1, 1971 as a tribute to the citizens of the city. It is still called the Husky Tower by airport officials, however, to distinguish it from the tower at the Calgary International Airport. The Petro-Canada Centre's west tower overtook the Calgary Tower as the tallest structure in Calgary in 1983. The 706 feet (215 m) skyscraper remains the tallest building in the city, while the twin-towers of Bankers Hall, completed in 1989 and 2000 have also surpassed the Calgary Tower. The Bow, currently under construction, will become the tallest building in Western Canada upon completion. A study was conducted in 1982 that proposed building an additional 85 metres (279 ft) shaft on top of the existing pod that would feature a second observation deck. The plan was never seriously considered, however, and the owners of the tower remain satisfied with its height. The tower underwent significant renovations between 1987 and 1990. The upper levels of the tower were closed in January 1987 for five months of construction that saw a $2.4 million refurbishment of the upper levels of the tower and the addition of a souvenir shop and a revolving restaurant that could complete a 360 degree turn in 45 minutes. The lower level was renovated over the course of a year in 1990, and featured the construction of a glass rotunda to serve as the new lobby of the building. A natural gas-fired cauldron was constructed at the top of the tower by Canadian Western Natural Gas in October 1987 as a gift to celebrate the 1988 Winter Olympics. The torch, which consumes 850 cubic metres (30,000 cu ft) per hour, was first lit on February 13, 1988 when the Games opened, and burned 24 hours a day throughout. It continues to be re-ignited for various special events, including Canada Day. The Tower was a founding member of the World Federation of Great Towers in 1989 along with the Eiffel Tower, among others. It celebrated its 25th anniversary in 1993, a year in which it topped 500,000 visitors for the first time. A glass floor extension was constructed on the north side of the tower's observation deck and opened on June 24, 2005. When standing on the glass, one can look straight down on 9th Avenue South and Centre Street.

Amenities
The Calgary tower features a revolving restaurant, Sky 360, that rotates so as to give customers a scenic view of downtown Calgary.The restaurant does a complete rotation at noon. The base of the tower is connected through the +15 skyway network to One Palliser Square, Fairmont Palliser Hotel and EnCana Place. Stairs to the observation deck are not opened to the public, but have been used on occasions for publicity, as well as for an annual charity stair-climbing race. There are 762 steps. In July 2006, the Official Tourism Calgary Information Centre moved to the base of the Calgary Tower, where a free Internet cafe and part of the Spirit of Calgary Boutique are also located. WestNet Wireless, also provides free Wi-Fi internet through out the Calgary tower. The tower also features a carillon that was presented to the city by the local Dutch community in 1975 as part of the city's centennial celebrations. It was played daily at noon until removed in 1987 for storage. The carillon has since been refurbished and restored to operation.

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