 Complete the following phrase:  Big Thunder Ski Jumping Centre was a twin ski jumping hill located in Thunder Bay in Northwestern Ontario, Canada. It constitutes part of Big Thunder National Training Centre. The first hills were built by Knute and Thor Hansen and opened in 1963. They were originally known as Lille Norway Ski Area, then Mt. Norway Ski Area, and Sundance Northwest Resort before taking the current name. The large and normal hills were built in 1974 and the venue was taken over by the provincial government in 1985. The hills hosted 29 FIS Ski Jumping World Cup and 50 Canadian Ski Jumping Championships tournaments between 1975 and 1995, climaxing with the 