The Kiandra snow shoe club is easily among the oldest continuing ski clubs in the world and was established by Norwegian gold prospectors in the mid-19th century. The Australian gold rushes first brought a population of skiers to the Australian snowfields in the 1860s. Ski chalets were established closer to Mount Kosciuszko in the early 20th century and the construction of the Snowy Mountains Hydro-Electric Scheme brought easier access and European workers with an interest in skiing, who helped build the modern ski resorts of New South Wales. In 2004, a mogul course called "Toppa's Dream" was constructed on Blue Cow. The Mount Buller World Aerials is an annual event on the World Cup calendar. Aerial skiers practice extensively on water before trying jumps on snow; Camplin jumped in a pond outside Melbourne. The Kangaroo Hoppet, a member of the Worldloppet Ski Federation series of cross-country skiing races, is an annual citizen race that attracts competitors from several countries. Ski jumping is currently non-existent in Australia.