Martin Mine, hoist
A hoist sets next to rails underground at the Martin Mine. Tools including shovels lean against the wall of the tunnel. The Martin Mine was an underground lead zinc mine near Benton, Wisconsin. The Upper Mississippi River Valley region (including southwestern Wisconsin) was being prospected for lead in the 1820s. By the 1850s it had become an important lead producing area. Zinc ores, previously discarded, were later identified as valuable and by the 1870s zinc production exceeded that of lead. The last zinc mine in the region closed in the 1970s.