Shortly after the start of the Korean War in 1950, the U.S. obtained intelligence that the Soviets were designing and manufacturing a massive offensive military force consisting of advanced jet aircraft and long range missiles. Realizing the new speed in which threats could reach the U.S., the Department of Defense designed and authorized the Corps of Engineers to construct as quickly as possible an array of 28 advanced radar stations which included Calumet Air Force Station. The location on Mt. Horace Greeley provided the perfect view the radar needed to identify distant threats outside of our borders. The station was fully operational on April 24th, 1951. The station was home to the 665th Aircraft Control and Warning Squadron and was active for almost 4 decades. When operational the 28 stations were the most advanced radar surveillance network in the world. Over 275 personnel worked at the base, making it one of the largest contributors to the local economy. Once closed the base was deeded to Keweenaw County. The base has been declared surplus and must be sold! Dates of Use: 1951-1988 US Air Force Radar Station. Station closed as a result of the deactivation of the unit involved. 1988-1999 US Air Force caretaking and environmental closure. 1998-2004 Keweenaw Academy- a juvenile corrections facility. 2004-Present Vacant/Site Clean Up