sentences:  After the gold rush, the population of the territory declined precipitously, reaching a low of 4,157 in 1921 and remained fairly steady until the 1940s.This was despite the development of other mining areas including silver in Conrad, Yukon and especially near Mayo, gold in the Kluane Lake area, and copper near Whitehorse.In the Klondike, individual miners' claims were bought out and consolidated with the help of the government by a small number of companies, including the Guggenheim's Yukon Gold Corporation who used large floating dredges.