Mercoal, a former coal mining town, is located in the Yellowhead County of western Alberta, Canada. It was one of several communities along the historic Coal Branch segment of the Grand Trunk Pacific Railway (now part of the Canadian National Railway), which included Embarras, Robb, Coalspur, Coal Valley, Cadomin, Luscar, and Mountain Park.

https://en.wikipedia.org/wiki/Mercoal,_Alberta