Library and Archives Canada: 16mm.
"A review of the operations of Steep Rock Iron Mines Limited at Atikokan. Animated graphics explain the history of the formation of this iron ore body beneath Steep Rock Lake. To mine the ore, it was first necessary to divert the water in the lake. There followed a 10-year dredging operation to remove the silt, beginning in 1949. An open-pit operation was established. Over the years, the operation at Steep Rock has grown to meet the requirements of steel mills for uniformly-sized ore, and later for ore pellets. A Concentrating Plant and a Pellet Plant were built, during the 1960s. The film also visits the community of Atikokan, which has developed around the mining operation. The transportation of the ore to the steel mills, via train and Great Lakes ships is also illustrated. The film ends with the discovery of a new ore body by the company, at Lake St-Joseph."