Photostory #298: World Food Gains from Saskatchewan Mining: Canadian Deposit Largest in World
National Film Board of Canada
November 14, 1961
Canadian Museum of Contemporary Photography fonds, National Gallery of Canada Library and Archives
Sinking shaft through 200-foot-thick layer of high-pressure sand, clay and water, 1,300 feet below ground, was major engineering obstacle. Shaft engineers expect little further trouble in reaching potash beds at 3,150-foot level.