2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6389B-8; Blast hole drilling with a Bucyrus-Erie 27-T churn drill. Blast holes were charged light and the paint rock was broken without covering roadway below the blasting area. Butler Brothers, Weggum Mine, Hibbing, Minnesota. - August 21, 1947 - F. G. Anderson.Date scanned: 2002-6-12.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.A churn drill drills blast holes at the Weggum Mine. The Weggum open pit mine in St. Louis County, Minnesota was operated by Butler Brothers. Butler Brothers was acquired by M. A. Hanna Company in the 1940s.Rights management statement available at: http://library.mines.edu/digital/rights.htmlButler BrothersIron mines and miningMiningOpen pit miningStillImage