Exxon formally announced the discovery of its zinc, copper, and lead ore body. 1977-1978 First comprehensive mining law passed. 1981 State drops non-degradation water quality standards. Exxon submitted its major design, engineering and environmental study documents along with the required permit applications. Exxon files its first mine application with the Wisconsin Department of Natural Resources.
Mining is exempted from clean groundwater standards.
Limits on foreign corporations owning more than 640 acres dropped. The company redesigned its mining proposal and submitted revised environmental documents and permit applications. Tommy Thompson is elected Governor. Exxon withdraws its permit applications, citing poor metal prices and indefinitely suspends project activity. Governor appoints James Klauser, Exxon lobbyist to be Secretary of Administration.