Stephenville Air Station

Stephenville Air Station (ADC ID: N-23) is a closed General Surveillance Radar station. It is located 9.5 km north-northwest of Stephenville, Newfoundland and Labrador, Canada. It was closed in 1971.

History
The site was established in 1951 as a General Surveillance Radar station, built by the United States Air Force as part of the Pinetree Line of Ground-Control Intercept (GCI) radar sites.

USAF units and assignments
Units:
 * 640th Aircraft Control and Warning Squadron

Assignments:
 * 64th Air Division (NEAC), 1 September 1951
 * 4731st Air Defense Group (ADC), 1 November 1957
 * Goose Air Defense Sector, 6 June 1960
 * 37th Air Division, 1 April 1966
 * 21st Air Division, 31 March 1970 – 30 June 1971