| | Underwriting Agreement On January 21, 2011, our affiliate, ONEOK Partners, L.P., a Delaware limited partnership (the “Partnership”) and one of the Partnership’s subsidiaries, ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership (the “Guarantor”), entered into an underwriting agreement (the “Underwriting Agreement”) with Citigroup Global Markets Inc., RBS Securities Inc. and UBS Securities LLC, as representatives (the “Representatives”) of the several underwriters named therein (the “Underwriters”), with respect to the issuance and sale by the Partnership of (i) $650 million aggregate principal amount of the Partnership’s 3.250% senior notes due 2016 (the “2016 Notes”) and (ii) $650 million aggregate principal amount of the Partnership̵ 7;s 6.125% senior notes due 2041 (the “2041 Notes” and collectively with the 2016 Notes, the “Notes”). The Underwriting Agreement contains customary representations, warranties and agreements by the Partnership and the Guarantor, and customary conditions to closing, indemnification obligations of both the Partnership and the Guarantor, on the one hand, and the Underwriters, on the other hand, including for liabilities under the Securities Act of 1933, as amended (the “Act”), obligations of the parties and termination provisions. The Partnership’s and the Guarantor’s respective obligations under the Underwriting Agreement are nonrecourse to us. The Partnership also agreed not to offer or sell certain debt securities until February 20, 2011 without the prior written consent of the Representatives. The foregoing description of the Underwriting Agreement is qualified in its entirety b y reference to such Underwriting Agreement, a copy of which is filed herewith as Exhibit 1.1 and is incorporated herein by reference. Indenture, Supplemental Indenture and Notes On January 26, 2011, the Partnership completed the underwritten public offering (the “Offering”) of the Notes. The Partnership registered the sale of the Notes with the Securities and Exchange Commission (the “Commission”) pursuant to a Registration Statement on Form S-3 (Registration No. 333-161923) filed on September 15, 2009 (the “Registration Statement”). The Partnership intends to use the net proceeds from the Offering of approximately $1.28 billion, after deducting underwriting discounts and offering expenses, to repay amounts outstanding under the Partnership’s $1 billion commercial paper program, to repay amounts on the maturity of the Partnership’s $225 million principal amount of senior notes due March 2011 and for general partnership purposes. The terms of the Notes are governed by the Indenture, dated as of September 25, 2006 (the “Indenture”), between the Partnership and Wells Fargo Bank, N.A., as trustee (the “Trustee”), as supplemented by the Sixth Supplemental Indenture with respect to the 2016 Notes (the “Sixth Supplemental Indenture”) and the Seventh |