Canal Electric Company is a wholesale electric generating company. The company is a wholly owned subsidiary of Commonwealth Energy System. In August 1999, Commonwealth Energy System merged with BEC Energy to form NSTAR. The Company generates, transmits and sells electricity in the United States. The company has a 3.52% interest in the Seabrook 1 nuclear power plant located in Seabrook, New Hampshire, to provide for a portion of the capacity and energy needs of Cambridge Electric Light Company and Commonwealth Electric Company which are retail distribution companies.