Cornish Pumping Engine
(Double Expansion Tandem Steam Engine)
Iron Mountain, MI
Double Expansion Tandem Steam Engine
Cylinders (HP/LP): 50/100
In service 1890-1932
ASME Historical Landmark Document
The pump actually operated a "beam" which raised & lowered a rod that extended 1500' down the vertical mine shaft. Eight separate pumps operated off the up & down motion of the rod pumping water 170-190' per stage.