The LORAN-C transmitter Gillette was a LORAN-C transmission facility near Gillette, Wyoming at 44.0031°N -105.6233°W. Its aerial, a 700feet guyed radio mast, was the tallest structure in Wyoming at one time.
The station was closed on February 8, 2010, as a budget cut. The station, and all of the others, were considered to be obsolete with the general availability of GPS devices.[1]