Justin Trudeau three half-siblings, Kyle and Alicia, from his mother's remarriage to Fried Kemper, and Sarah, from his father's relationship with Deborah Coyne. Trudeau lived at 24 Sussex Drive, Ottawa, the official residence of Canada's prime minister, from his birth until his father's government was defeated in the federal election on May 22, 1979. The Trudeaus were expected to move into the residence of the Leader of the Official Opposition, Stornoway, at 541 Acacia Avenue in Rockcliffe Park, but because of flooding in the basement, prime minister Joe Clark offered them Harrington Lake, the prime minister's official country retreat in Gatineau Park,
Harrington Lake for several decades. Since the land was not suitable for farming, the lumber industry replaced it as the primary economic activity. In the early 20th century, two Americans, W. A. Drum and W. L. Donnelly, built a sawmill at Harrington Lake to serve the lumber industry. In the 1920s, Lieutenant Colonel Cameron Macpherson Edwards, a member of a prominent lumbering family in Ottawa, inherited part of the property from his uncle, Senator William Cameron Edwards (who had owned 24 Sussex Drive). He recognized the value of the land for recreation, as well as for lumber. He purchased more land around