Coeur Alaska, Inc. v. Southeast Alaska Conservation Council, 557 U.S. 261 (2009), is a United States Supreme Court case that was decided in favor of Coeur Alaska's permit to dump mine waste in a lake. The case addressed tailings from the Kensington mine, an underground mine located in Alaska. The gold mine had not operated since 1928, and Coeur Alaska obtained a permit in 2005 from the United States Army Corps of Engineers (USACE) to dispose of up to 4.5 million tons of tailings in Lower Slate Lake, which is located in a National Forest.