The Canadian Pacific's pair of class K1a 4-8-4s were the first engines built in Canada with a one-piece cast steel frame. With a 93.5-square-foot grate area, they have 4931 square feet of evaporative heating surface and 2112 square feet of superheater surface. In this A. B. Crompton image contributed by Tac Foley, No. 3100 appears at Montreal in August 1958 looking as though it has been withdrawn from service. Oddly enough, however, both of these rare CPR 4-8-4s survive. Today No. 3100 is displayed at the Canada Science and Technology Museum in Ottawa, Canada's capital city.