NORTHERN NATURAL GAS COMPANY, operating as Peoples Natural Gas Division, Appellant, v. MINNESOTA PUBLIC SERVICE COMMISSION et al., Respondents, Eveleth Taconite Company, Respondent, Reserve Mining Company, Respondent, Erie Mining Company, Respondent, Hanna Mining Company, Respondent, United States Steel Corporation, Respondent. No. 50318.Supreme Court of Minnesota. May 16, 1980. Appeal from the District Court, Ramsey County, […]