Mine: Hartford Mine, Negaunee, MI
Began → Hartford Mine → Became
Owned by: Oliver Mining Co, in 1908.
Produced: Iron Ore
Stamp Mill/Pellet Plant:
E 1/2 of Lot 5, and lots 6 and 7 in Section 35, 48-27 on the east end of Teal Lake.
May 5, 1911 - Hartford-Cambria #2, Negaunee, Marquette Co. - Fire in mine - 7 fatalities