Petersen, Max S.2007-01-032022-02-032007-01-032022-02-03http://hdl.handle.net/11124/7496Date scanned: 2002-6-18.Information Center for Ropeway Studies Image Collection.USBM #63153; Removing detachable bits with special wrench and chuck. (Starting size of bits is 2-7/8 inches). Cold Spring Granite Company, Isle, Minnesota. - M. S. Petersen - April 1946. Donor: United States Bureau of Mines.Donor: United States Bureau of Mines.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Cold Spring Granite Company (originally the Rockville Company) has been in operation since 1898. The Company started quarrying the Cold Spring granite in Minnesota for monumental and building stone, and acquired other properties in the US to become a major granite producer.Rights management statement available at: http://library.mines.edu/digital/rights.htmlCold Spring Granite CompanyGranite industry and tradeQuarries and quarryingPeopleStillImage