Center, based at Joint Base Elmendorf-Richardson, Alaska. The site is generally unattended. Because of its proximity to King Salmon Airport , only two civilian contractor maintenance and support personnel are needed to maintain the radar system. Air Force units and assignments Units 705th Aircraft Control and Warning Squadron Activated on 1 November 1951 Inactivated on 1 November 1983 Assignments 531st Aircraft Control and Warning Group, 17 November 1951 10th Air Division, 13 April 1953 5039th Aircraft Control and Warning Group (later 5040th Aircraft Control and Warning Group, 1 June 1957 10th Air Division, 1 November 1959 5070th Air Defense Wing, 1 August 1960 Alaskan Air Command, 1 November 1961 531st Aircraft Control and Warning Group (later 11th Tactical Control Group, 11th Tactical Control Wing, 11th Air Control Wing, 611th Air Operations Group, 611th Air and Space Operations Center) 15 July 1977 See also Alaskan Air Command References Alaskan Air Defenses Information for King Salmon AFS, AK Installations of the United States Air Force in Alaska Buildings and structures in Bristol Bay Borough, Alaska 1951 establishments in Alaska Military installations established in 1951