(4-traders.com) Hecla Mining Company (NYSE:HL) announced today that its acquisition of Revett Mining Company, Inc. (Revett) is now complete. The acquisition brings to Hecla the Rock Creek Project, considered to be one of the largest undeveloped silver and copper deposits in North America. Hecla intends to continue to...http://www.4-traders.com/HECLA-MINING-COMPANY-12936/news/Hecla-Mining--Completes-Acquisition-of-Revett-Mining-Company-Inc-20544093/