Overview -- U.S.-based Alpha Natural Resources Inc. is cutting production amid a sharp cyclical drop in domestic demand for coal, which will lead to lower-than-expected EBITDA in 2012 and 2013. -- We are lowering our ratings on Alpha Natural Resources, including the corporate credit rating, to 'B+' from 'BB-', and are removing all of the ratings from CreditWatch, where we placed them with negative implications on Sept. 19, 2012. -- We assigned our 'B+' issue-level rating and '