Mercoal's name was an acronym for the McLeod River Hard Coal Company, co-owned by Nick Gurvich, who opened an underground coal mine in 1920. In 1924 the mine was sold to Saunders Ridge Coal Company, Ltd.[3] The Mercoal mine was the last major operator in the Coal Branch area, and it attracted workers from other Coal Branch towns after the closure of the mines at Mountain Park in 1950 and Cadomin in 1952. The Mercoal mine finally closed on July 17, 1959.[4]