Because of the high altitude, the
Royal Canadian Air Force built a radar base on the site in the 1950s as part of the
Pinetree Radar Line, established for the detection of nuclear bombers coming over the polar region from the Soviet Union.
Canadian Forces Station (CFS) Foymount was closed in 1974 because more powerful radar installations that overlapped Foymount's coverage area were built at
Canadian Forces Station (CFS) Falconbridge in Ontario and
CFS Lac St. Denis in Quebec. Following the closure of the radar base, the associated buildings and properties were sold off to private interests. == Telecommunications and broadcasting ==