; and (C) 150 miles of land and water on the international border with the Government of Canada. (3) In 1978, Congress passed the Boundary Waters Canoe Area Wilderness Act ( Public Law 95–495 ) to remove incompatible uses, prohibit mining within the Boundary Waters Canoe Area Wilderness and on 220,000 acres of the Superior National Forest, and to provide management guidance to protect, preserve, and enhance the lakes, waterways, and forested areas of the Boundary Waters Canoe Area Wilderness to enhance public enjoyment of the unique landscape and wildlife. (4) The federally recognized Grand Portage Band of Lake Superior Chippewa, the Fond du Lac Band of Lake Superior Chippewa, and the Bois Forte Band of Chippewa retain hunting, fishing, and other usufructuary rights throughout the entire northeast portion of Minnesota, including the Boundary Waters Canoe Area Wilderness, under the 1854 Treaty of LaPointe. All Bands have a legal interest in protecting natural resources and the Forest Service shares in the Federal trust responsibility to maintain treaty resources. (5) The Rainy River Watershed lies within the Superior National Forest, which contains 20 percent of the fresh water supply in the entire National Forest System. (6) The Rainy River Watershed headwaters begin in northeastern Minnesota and flow north through the Boundary Waters Canoe Area Wilderness and Voyageurs National Park and into Canada along the shared international border. These international waters are governed by the 1909 Boundary Waters Treaty, which states that boundary waters and the waters flowing across the boundary shall not be polluted on either side to the injury of health or property on the other . (7) The waters of the Boundary Waters Canoe Area Wilderness and Voyageurs National Park are classified as Outstanding Resource Value Waters under Federal and State law, and degradation of water quality is prohibited. A risk of mining development is acid mine drainage which generally occurs when sulfide minerals are exposed to air and water