Woody Guthrie sang about this little-known piece of history.
A one-man drill operation
In July 1913, over 7,000 miners struck the C&H Copper Mining Company in Calumet, Michigan. It was largely the usual issues of people who worked for a big company during a time when capitalists ran roughshod over their workers — a time when monopolies were a way of life. Strikers' demands included pay raises, an end to child labor, and safer conditions including an end to one-man drill operations, as well as support beams in the mines (which mine owners didn't want because support beams were costly but miners killed in cave-ins “do not cost us anything.")