SURFACE COAL MINING MANAGEMENT. Paul Westcott. The geological characteristics of surface coal mining which distinguish it from other surface mining are the nature of formation and its relatively low value, which often require surface coal mines to move large volumes of overburden over a large area (i.e., it has a high stripping ratio).
US California Slumburbia. February 10, 2010 New York Times* By TIMOTHY EGAN. In Lathrop, Manteca and Tracy, California, among some of the world's most productive farmland, you can find streets of foreclosed home, looking like a 21st century ghost town, with rock bottom discounts on
Technological and industrial history of 20th century
The late Electric Age (19011920) Industrial processes and techniques. Metal mining also became significant industry during this period. The International Nickel Company was established in 1902 through the fusion of two companies.A refinery using the Orford process was built in Port Colborne, Ontario in 1918 and then moved to Copper Cliff, Ontario, where that technique was replaced by the