AMENDMENT TWO TO THE AQUILA, INC. SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Amended and Restated Effective as of January 1, 2005)

Exhibit 10(a)(15)

AMENDMENT TWO TO THE
AQUILA, INC. SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
(Amended and Restated Effective as of January 1, 2005)

        This Amendment is made by Aquila, Inc., a Delaware corporation (the "Company").

        WHEREAS, the Company maintains the Aquila, Inc. Supplemental Executive Retirement Plan (the "Plan") the benefit of a select group of management or highly compensated employees; and

        WHEREAS, the Plan was most recently amended and restated in its entirety on July 31, 2007 and amended by Amendment One dated November 7, 2007, and the Company now desires to further amend the Plan to clarify the manner in which a participant's benefit is computed;

        NOW, THEREFORE, the Plan is amended as follows:

        A.    The third paragraph under the introductory "History and Purpose" section is amended to read as follows:

•         Notwithstanding any provision in this document to the contrary, in no event shall a Participant's combined benefit under this Plan and the Retirement Income Plan be less than his combined benefit as of December 31, 2004.

        B.    The definition of "Projected Credited Service" under Section 1.14 is amended by deleting the reference to: "..., for purposes of computing a Participant's Supplemental SERP Benefit,..."

        C.    Section 3.02 is amended by deleting the reference to "a Participant's" and inserting "an active employee's" in lieu thereof.

        D.    The first paragraph of Section 4.01, Basic SERP Benefit , is amended to read as follows:

•         Subject to Section 3.01(a) and Section 6.02, a Participant's Basic SERP Benefit, as adjusted pursuant to Section 4.04, shall be equal to (A) minus (B), where: