Black and white photograph of the Frontenac engine house and boiler house at the Hecla Location of Calumet & Hecla Mining Co. in Calumet, Michigan. The photograph was taken west of Mine Street, looking east. The building on the left was the railroad office, and the tracks in the foreground were used by Calumet & Hecla to haul rock copper. "Frontenac" refers to the type of hoisting engine, which was located in an engine house adjacent to the boiler house, and operated Hecla shafthouses 3 and 4. The Calumet & Hecla Mining Company was a copper mining giant in the area, with mining and administrative buildings throughout and surrounding Calumet, many of which still exist. Copper mining took place in the area from the mid-19th Century into the 20th Century. The Great Depression caused the closing of most copper mines in the area, although C & H continued operating until 1968.