CARNEGIE NATURAL GAS COMPANY, PETITIONER, v. FEDERAL ENERGY REGULATORY COMMISSION, RESPONDENT, UGI CORPORATION, NEW JERSEY NATURAL GAS COMPANY, INTERVENORS. CARNEGIE NATURAL GAS COMPANY, PETITIONER, v. FEDERAL ENERGY REGULATORY COMMISSION, RESPONDENT, NEW JERSEY NATURAL GAS COMPANY, UGI CORPORATION, INTERVENORS. Nos. 90-1434, 91-1236.United States Court of Appeals, District of Columbia Circuit.Argued May 1, 1992. Decided July 10, […]