 At its high point, the Dominion Coal Company operated eleven mines in the town of Glace Bay which were responsible for forty percent of Canada's coal production.The GMA was transformed into Nova Scotia Steel and Coal Company (SCOTIA) and developed mines on the north side of Sydney Harbour.In 1899, DOMCO financed the construction of a large integrated steel mill in Sydney's Whitney Pier neighbourhood, which was named Dominion Iron and Steel Company (DISCO); the DISCO mill smelted iron ore mined in Bell Island, Newfoundland.