AMENDMENT TO INDEPENDENT CONTRACTOR AGREEMENT

AMENDMENT TO INDEPENDENT CONTRACTOR AGREEMENT

On May 3, 2010, Black Hills Corporation, Inc. (“Company”) and Lone Mountain Investments, Inc. (“Contractor”) entered into an Independent Contractor Agreement (the “Agreement”), pursuant to which Contractor agreed to provide certain Services in support of Company's subsidiary, Black Hills Exploration and Production, Inc. The Agreement was set to expire according to its original terms on July 31, 2011, and was extended by mutual agreement of the parties through December 31, 2011, in order to complete the provision of Services. The parties now agree that the Services will require further engagement of Contractor, beyond the initial extension date, to provide transition consulting to the new Vice President and General Manager. Therefore, it is hereby agreed as follows:

1. The term of the Agreement as stated in Article 3 (Agreement Expiration) is extended in order to permit the performance of Services up to or until January 31, 2012. In the event that Services are satisfactorily completed prior to that date, this Agreement may be terminated pursuant to the provisions of Article 4.

2. This Amendment to the Agreement sets forth the only alterations intended by the parties and constitutes their entire understanding and agreement. Subject to the terms of this Amendment, the Agreement remains in full force and effect and the terms thereof may not be waived, altered or further modified without the written agreement of the parties.

IN WITNESS WHEREOF the parties hereto have executed this Amendment to Independent Contractor Agreement, this 6th day of December, 2011.

BLACK HILLS CORPORATION

By: /s/ Xxxxx X. Xxxxx

Name: Xxxxx X. Xxxxx

Title: Chairman, President and CEO

LONE MOUNTAIN INVESTMENTS, INC.

By: /s/ Xxxx X. Xxxxxx

Name: Xxxx X. Xxxxxx

Title: Managing Director Lone Mountain Investments, Inc.