Dominion Generation manages the electric generating plants of Dominion Virginia Power, Dominion North Carolina Power and Dominion Energy. A variety of power stations and combustion turbines are used to produce electricity. By using a mix of energy sources to generate electricity, the company enhances its system's reliability. This guards against major problems that might be produced by economic, environmental or technical problems that could arise in a single area. Dominion Generation provides electricity for use on a wholesale and a retail level. The company can supply electricity demand either from its generation facilities in various states or through purchased power contracts when needed. Dominion Generation is a division of Dominion and is headquartered in Richmond, Va.