The BX sternwheeler was the first of two river steamers built for service on the upper Fraser River by the BC Express Company during the busy era of Grand Trunk Pacific Railway construction.The BX was built at Soda Creek in early 1910 by Alexander Watson Jr, of Victoria, who was one of British Columbia's foremost shipbuilders and the son of the man who had built the Charlotte.The BC Express Company also hired Captain Owen Forrester Browne to be the master of the BX as he was the most experienced upper Fraser River pilot.