TAMPA, Florida ( TheStreet) -- Walter Energy ( WLT) submitted an offer to acquire Canada's Western Coal for C$11.50 ($11.29) a share in cash and stock. Walter Energy, in a statement Thursday, said it has agreed to purchase 19.8% of Western Coal's shares from from affiliates of Audley Capital for C$11.50 a share, or a total of about C$630 million ($618.7 million). Walter Energy said the total enterprise value of the proposal for Western Coal is C$3.3 billion ($3.24 billion). The offer is a 56% premium to Western Coal's closing price Thursday in Toronto. Walter Energy said a combination with Western Coal would make it the "leading, publicly traded 'pure-play' metallurgical coal producer in the world, with unique and strategic access to steel producing markets in both the Atlantic and Pacific Basins." The combined company, on a pro forma basis, would have total coal reserves of about 385 million tons, Walter Energy said. Western Coal, in a separate press release, said it agreed to work exclusively with Walter until Dec. 1 while due diligence is performed. -- Written by Joseph Woelfel >To contact the writer of this article, click here: Joseph Woelfel >To submit a news tip, send an email to: firstname.lastname@example.org.