Williams, M. L.2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/7248D.C.-10; Initial blast in coal in completed box cut. Shear cuts were made in coal on two sides, providing two free faces and resulting in cleaner blasting. Indianhead Strip Mine, Dakota Collieries Company, Zap, Mercer County, North Dakota.Date scanned: 2002-6-26.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.The Indianhead strip coal mine near Zap, North Dakota, was operated by Dakota Collieries Company and successors.Rights management statement available at: http://library.mines.edu/digital/rights.htmlDakota Collieries CompanyBlastingCoal mines and miningScenes, snowStrip miningStillImage