The LORAN-C transmitter Gillette was a LORAN-C transmission facility near Gillette, Wyoming at 44°00′11″N 105°37′24″W. Its aerial, a 700-foot (210 m) guyed radio mast, is the tallest structure in Wyoming.
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.
References
LORAN-C transmitter Gillette Wikipedia(Text) CC BY-SA