Shut down Space Fence

 military, radar station, abandoned / shut down, United States Air Force

Air Force Space Surveillance System.
One of the nine Air Force Space Surveillance System (formerly NAVSPASUR) sites is located at Lake Kickapoo (33°32.764′N 98°45.763′W). It is the master transmitter and the most powerful continuous wave (CW) station in the world, at 768 kW radiated power.
216.983 MHz
en.wikipedia.org/wiki/Lake_Kickapoo

The Fence can detect basketball-sized objects in orbit around the Earth out to an effective range of 15,000 nautical miles. Once the object's location and general direction of movement are determined, Fence operators notify JSpOC, which can then direct a tracking radar to make a more precise determination of the object's characteristics. More than 5 million satellite detections, or observations, are collected by the Fence each month.
The system ceased operation in September 2013.
www.globalsecurity.org/space/systems/afsss.htm