Tin Cup Pass
Economic and political development of contemporary Yukon
During World War II such military projects as the Alaska Highway, a part of the Pan-American Highway system, brought a second boom to the territory. Some 10,000 workers, both military and civilian, arrived from the United States to construct the highway, a project that took less than a year (1942–43) to complete. Improvements in transportation and communications helped open the territory to greater exploration and development, while increased public interest in the area prompted a great expansion of government services and an increased influx of tourists. Most of this activity centred on Whitehorse, which replaced Dawson as the territorial capital in 1953.
source: https://www.britannica.com/place/Yukon-territory/The-gold-rush-and-territorial-status