Coal mining employs surface and underground methods to extract coal. ... Coal Extraction in a Powder River, Wyoming Strip Mine ... The process involves the removal of up to 1,000 vertical feet of overburden to expose underlying coal seams.
May 16, 2016 ... Mineral and Coal Mining Regulatory Framework | page 7. 3. Contracts of Work ... the protracted CoW/CCoW renegotiation process; ... to commit to large expenditures on exploration, development or downstream processing.