By the end of 1912, there were nine working coal mines, in Newcastle, Drumheller, Midland, Rosedale, and Wayne. In years to follow more mines sprang up: Nacmine, Cambria, Willow Creek, Lehigh, and East Coulee. The timing of the Drumheller mine industry was "lucky" according to the Atlas National Historical Site, in that the United Mine Workers union had recently won the right for better working conditions. As a result of union action, child labour laws were passed to prevent boys under 14 years old working underground.