The latest information on Twin Metals at the federal and state levels and actions you can take to defend the BWCA. Since 1964, The Boundary Waters has been a federally designated Wilderness Area. In 1978, the Boundary Waters Canoe Area & Wilderness Act expanded the wilderness to the nearly 1.1 million acres that it is today. This designation has prevented development in this pristine expanse of interconnected lakes and streams, as well as set forth rules and regulations that control recreational use practices, adding to the region's Wilderness character.