From the MSHA website. Mine name: Black Rock Canyon Website: www.msha.gov/drs/drshome.htm MSHA Website images.investorshub.advfn.com/images/uploads/2012/1/16/pitqrMSHA_Hours.JPG Source: images.investorshub.advfn.com/images/uploads/2012/1/16/jtsuvMSHA_Hours_-_Source.JPG