Title: Calumet and Hecla
Subject Headings: Metal Trade - Copper Industry and Trade - Copper Mines and Mining, Accidents,
Description: First caving in of overhanging rock after copper rock has been removed, Calumet-Hecla Mines, Calumet, Mich.
Source of Description: Front of slide.
Institution: Michigan Technological University Archives and Copper Country Historical Collections
Donor: Universal Oil Products
Date of Photo: 1915
Medium: still image
Color: black and white
Size: 8.3 cm x 10.3 cm
Image No: MS003-032A-25-17
Collection Name: Calumet and Hecla Photograph Collection