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The construction of Expedition Everest was a laborious task for Disney. Imagineers went through twenty four different designs before finally settling on a model<ref name= "machine"> http://machinedesign.com/recreation/engineering-expedition-everest-complete-yeti </ref>. After choosing the final design, Imagineers created a six foot model which was then uploaded to a computer<ref name= "jack"/>. At this stage, Imagineers could tinker with the track design before construction on the track itself began<ref name= "jack"/>. Expedition Everest is actually made up of three different foundations, : the track, the mountain, and the yeti, which are supported separately<ref name= "jack"/>. During the construction of the track, Disney used 25,000 pieces of steel, which together weighed 1,800 tons<ref name= "jack"/>. To create the mountain itself, 18.7 million pounds of concrete and 2,000 gallons of paint were used<ref name= "jack"/>. Expedition Everest- Legend of the Forbidden Mountain officially opened on April 7, 2006 (previews for the attraction had begun on January 26)<ref name= "wdw"> http://www.wdwmagic.com/attractions/expedition-everest/news/07apr2006-expedition-everest-opening-day-press-release.htm </ref>. On hand for the festivities were Disney CEO Bob Iger and Jay Rasulo, the chairman of Disney Parks and Resorts<ref name= "wdw"/>.