Alaska sues EPA over Pebble copper and gold mine prohibitions

April 11 (Reuters) - Alaska sued the U.S. Environmental Protection Agency on Thursday seeking to overturn an agency decision that it said effectively blocked development of one of the world’s largest copper and gold deposits. The complaint filed in an Anchorage federal court challenges the EPA’s 2023 final determination that prohibited the discharge of mining waste from the so-called Pebble deposit into the state’s Bristol Bay. It comes about a month after a similar lawsuit was filed by the site's developer, Northern Dynasty Minerals (NDM.TO) . The Bristol Bay watershed...