The 661st Aircraft Control and Warning Squadron was activated at Selfridge in 1951, and with a pair of General Electric AN/CPS-6 Radars,[clarification needed] the station became site LP-20 of the permanent ADC network in 1952.

The station became part of the Semi Automatic Ground Environment radar network in 1959, supplying radar tracks to SAGE data center DC-06 at Custer Air Force Station, Michigan, for directing interceptor aircraft and CIM-10 Bomarc air defense missiles.

The 661st AC & WS also operated Gap Filler sites with Bendix AN/FPS-18 Radars before inactivating on July 1, 1974.

In 1960, Army Air Defense Command Post (AADCP) D-15DC was constructed for coordinating Nike surface-to-air missile launches from numerous Michigan batteries from Algonac/Marine City (D-17) south to Carleton (D-57) & Newport (D-58).

The Missile Master bunker was subsequently used as an air traffic control center[2] staffed by the 2031st Communications Squadron.