Millennium Force design and development phases of Millennium Force took place over five years. The first rumors that a new record-breaking roller coaster would be built at Cedar Point, which included speculation about a ten inversion roller coaster from Bolliger & Mabillard and an Arrow Dynamics MegaLooper, began circulating in early 1998. A roller coaster from D. H. Morgan Manufacturing was also rumored. On July 2, 1999, Cedar Fair Entertainment Company filed a trademark for the name Millennium Force, which raised more speculation about what the ride would be like. About a week later, the first track pieces were seen at the
Kingda Ka The ride was closed for three months for repairs and reopened on August 21, 2009. On August 27, 2011, Kingda Ka suffered unspecified damage shortly before Hurricane Irene; that same day, Six Flags Great Adventure did not open due to the approaching hurricane. While it is unknown whether additional damage occurred due to the storm, the coaster was damaged to the extent that it could not run before Irene. Kingda Ka remained closed until the start of the 2012 operating season on April 5. Shortly before 5:00 pm on July 26, 2012, a young boy was sent to the hospital