2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/7896Date scanned: 2001-09-12.Identifier: NMHFM-675.Unmounted.Held in the National Mining Hall of Fame and Museum.The image shows an unidentified underground mine site on a mountain slope. The "Pennsylvania Project" may refer to environmental mitigation efforts at this site.Rights management statement available at: http://library.mines.edu/digital/rights.htmlMine buildingsUnderground miningStillImage