Exhibit 4.6 THIRD SUPPLEMENTAL INDENTURE THIRD SUPPLEMENTAL INDENTURE, dated as of December 21, 2001 (this "Third Supplemental Indenture"), between NorthWestern Corporation, a Delaware corporation (the "Company"), and JPMorgan Chase Bank (as successor...Third Supplemental Indenture • December 21st, 2001 • Northwestern Corp • Electric & other services combined • New York
Contract Type FiledDecember 21st, 2001 Company Industry Jurisdiction
WITNESSETH:Third Supplemental Indenture • May 1st, 1997 • CMS Energy Corp • Electric & other services combined
Contract Type FiledMay 1st, 1997 Company Industry