The Union Colliery Company was a bituminous coal mining company based in St. Louis Missouri.
The company had branch offices in Milwaukee, Racine, and Kenosha, Wisconsin, as well as Detroit, Michigan.
[1] The company was acquired in 1937 by East St. Louis Light and Power.
[3][4] It remained a subsidiary until ceasing operations in June, 1958.
[5] The company operated the following mines: