 Gillette is a city and county seat of Campbell County.It is a small city centrally located in an area that is vital to the development of vast quantities of American coal, oil, and coal bed methane gas, as a result, the city calls itself the "Energy Capital of the Nation".At about , WYO 59 intersects I-90 (Exit 126) and then enters downtown and intersects US 14/US 16/I-90 BUS at a "T" intersection at .