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The expansion, which began in 2005, is expected to generate 2 million tons of production in 2010 and up to 3.5Mt in 2012.
The additional production will increase Walter's rated capacity for premium coking coal to 9.5Mt in 2012.
The footprint of the expansion is approximately 19.5 square miles, holding sufficient reserves for 20 years of production.
“The expansion of the mine to an annual capacity in excess of 6 million tons makes it the largest low-vol hard coking coal mine in North America and the expansion is ideally timed to meet expected growth in demand for premium, low-vol hard coking coal," Walter chief executive Victor Patrick said.
