QuickLinks -- Click here to rapidly navigate through this documentGuaranty Agreement • October 15th, 2001 • Cornerstone Propane Partners Lp • Retail-retail stores, nec • Delaware
Contract Type FiledOctober 15th, 2001 Company Industry JurisdictionThis letter agreement (the "Agreement") will confirm the understanding between NorthWestern Corporation ("NorthWestern") and CornerStone Propane GP, Inc. (the "GP"), in reference to that certain Refunding Credit Agreement, dated as of November 20, 1998, as amended June 30, 2000, among CornerStone Propane, L.P., a Delaware limited partnership (the "Borrower"), Bank of America, N.A. as Agent (the "Agent"), and the financial institutions ("Lenders") signatory thereto (the "Credit Agreement), and that certain Guaranty Agreement, dated as of June 30, 2000, as amended, by NorthWestern in favor of the Agent on behalf of the Lenders (the "Guaranty"). Capitalized terms used and not otherwise defined herein shall have the meanings set forth in the Guaranty.