. . . Exhibit 21 Subsidiaries of Cleveland-Cliffs Inc as of February 6, 2004
Jurisdiction of Incorporation Name of Subsidiary or Organization - ------------------ ----------------------- CALipso Sales Company(3) Delaware Cleveland-Cliffs Ore Corporation(1),(2) Ohio Cliffs and Associates Limited(3) Trinidad Cliffs Biwabik Ore Corporation(2) Minnesota Cliffs Empire, Inc.(1),(4),(12) Michigan Cliffs Erie L.L.C.(9) Delaware Cliffs IH Empire, Inc.(1),(12) Michigan Cliffs International Management Company LLC Delaware Cliffs Marquette, Inc.(1),(2) Michigan Cliffs MC Empire, Inc.(1),(4) Michigan Cliffs Mining Company Delaware Cliffs Mining Services Company Delaware Cliffs Minnesota Mining Company Delaware Cliffs Natural Stone, LLC(13) Minnesota Cliffs Oil Shale Corp.(2) Colorado Cliffs Reduced Iron Corporation Delaware Cliffs Reduced Iron Management Company(5) Delaware Cliffs Synfuel Corp.(2) Utah Cliffs TIOP, Inc.(1),(6) Michigan Cliffs Venezuela Technical Services Company LLC(15) Delaware Empire-Cliffs Partnership(4) Michigan Empire Iron Mining Partnership(7) Michigan Hibbing Taconite Company, a joint venture(8) Minnesota IronUnits LLC Delaware Lake Superior & Ishpeming Railroad Company Michigan Lasco Development Corporation Michigan Marquette Iron Mining Partnership(2) Michigan Marquette Range Coal Service Company(6),(7) Michigan Minerais Midway Ltee-Midway Ore Company Ltd.(9) Quebec, Canada Northshore Mining Company Delaware Northshore Sales Company Ohio Pickands Hibbing Corporation(8) Minnesota Republic Wetlands Preserve LLC(2) Michigan Seignelay Resources, Inc.(9) Delaware Silver Bay Power Company(10) Delaware Syracuse Mining Company(9) Minnesota The Cleveland-Cliffs Iron Company Ohio The Cleveland-Cliffs Steamship Company(1) Delaware Tilden Mining Company L.C.(6) Michigan United Taconite LLC(14) Delaware Wabush Iron Co. Limited(9),(11) Ohio Wheeling-Pittsburgh/Cliffs Partnership(12) Michigan
(1) The named subsidiary is a wholly-owned subsidiary of The Cleveland-Cliffs Iron Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc. (2) Marquette Iron Mining Partnership ("Marquette Partnership") is a Michigan partnership. Cleveland-Cliffs Ore Corporation and Cliffs Marquette, Inc., wholly-owned subsidiaries of The Cleveland-Cliffs Iron Company, have a combined 100% interest in the Marquette Partnership. Cleveland-Cliffs Ore Corporation also owns 100% of Cliffs Biwabik Ore Corporation. The Marquette Partnership owns 100% of Cliffs Oil Shale Corp., Cliffs Synfuel Corp. and Republic Wetlands Preserve LLC. (3) Cliffs and Associates Limited is a Trinidad corporation. Cliffs Reduced Iron Corporation has an 82.39% interest in Cliffs and Associates Limited. CALipso Sales Company is a wholly-owned subsidiary of Cliffs and Associates Limited. (4) Empire-Cliffs Partnership is a Michigan partnership. Cliffs MC Empire, Inc. and Cliffs Empire, Inc., wholly-owned subsidiaries of The Cleveland-Cliffs Iron Company, have a combined 100% interest in Empire-Cliffs Partnership. (5) The named subsidiary is a wholly-owned subsidiary of Cliffs Reduced Iron Corporation, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc. (6) Tilden Mining Company L.C. is a Michigan limited liability company. Cliffs TIOP, Inc., a wholly-owned subsidiary of The Cleveland-Cliffs Iron Company, has an 85% interest in Tilden Mining Company L.C. Tilden Mining Company L.C. has a 51.43% interest in Marquette Range Coal Service Company. (7) Empire Iron Mining Partnership is a Michigan partnership. The Cleveland-Cliffs Iron Company has a 79% indirect interest in the Empire Iron Mining Partnership. Empire Iron Mining Partnership has a 48.57% interest in Marquette Range Coal Service Company. (8) Cliffs Mining Company has a 10% and Pickands Hibbing Corporation, a wholly-owned subsidiary of Cliffs Mining Company, has a 13% interest in Hibbing Taconite Company, a joint venture. (9) The named subsidiary is a wholly-owned subsidiary of Cliffs Mining Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc. (10) The named subsidiary is a wholly-owned subsidiary of Northshore Mining Company, which in turn is a wholly-owned subsidiary of Cleveland-Cliffs Inc. (11) Wabush Iron Co. Limited is an Ohio corporation. Wabush Iron Co. Limited owns a 26.83% interest in Wabush Mines. (12) Wheeling-Pittsburgh/Cliffs Partnership ("W-P/Cliffs Partnership") is a Michigan partnership. Cliffs Empire, Inc. and Cliffs IH Empire, Inc., wholly-owned subsidiaries of 2 The Cleveland-Cliffs Iron Company, have a combined 100% interest in W-P/Cliffs Partnership. (13) Cliffs Natural Stone, LLC is a Minnesota limited liability company. Cliffs Erie L.L.C., a wholly-owned subsidiary of Cliffs Mining Company, has a 56% interest in Cliffs Natural Stone, LLC. (14) United Taconite LLC is a Delaware limited liability company. Cliffs Minnesota Mining Company, a wholly-owned subsidiary of Cleveland-Cliffs Inc, has a 70% interest in United Taconite LLC. (15) Cliffs Venezuela Technical Services Company LLC is a Delaware limited liability company. Cliffs International Management Company LLC, a wholly-owned subsidiary of Cleveland-Cliffs Inc, has a 100% interest in Cliffs Venezuela Technical Services Company LLC. 3