Stott, Roy G.2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/7403Date scanned: 2002-6-20.I. S.-2; Coyote hole primacord blast cross ties with stub drift charge connections on the right. Note lower loop of primacord on either side of the floor has been covered with cardboard and fine material for protection. Hill-Annex Mine, Inter-State Iron Company, Calumet, Minnesota. - R. G. Stott - July 29, 1947.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 coyote hole is a small tunnel driven into the rock at right angles to the pit wall, with crosscuts from it parallel to the face. Explosive charges are placed in the crosscuts and the hole filled with debris or concrete to tamp it for the blast. The Hill-Annex Mine was an open pit iron mine in the Mesabi Range, Minnesota. The Mine started shipping ore in 1914 under Inter-State Iron Company and operated until 1978, producing some 63 million tons of ore. After the Hill-Annex was closed the pit flooded, and the site became a state park in 1988.Rights management statement available at: http://library.mines.edu/digital/rights.htmlInter-State Iron CompanyBlastingIron mines and miningOpen pit miningScenes, undergroundStillImage