Black Hills Corporation Watch

from 10-K 8 pages First Amendment to Purchase and Sale Agreement

from 8-K 10 pages This Guaranty, Dated as of July 12, 2015 (This “Guaranty”), Is Made by Black Hills Corporation, a South Dakota Corporation (“Guarantor”), in Favor of Alinda Gas Delaware LLC, a Delaware Limited Liability Company; Alinda Infrastructure Fund I, L.P., a Delaware Limited Partnership and Aircraft Services Corporation, a Nevada Corporation (Collectively, the “Sellers”), and Executed and Delivered in Connection With the Purchase and Sale Agreement Dated as of Even Date Herewith (Hereinafter Referred to as the “Acquisition Agreement”) by and Between Sellers and Black Hills Utility Holdings, Inc., a South Dakota Corporation (“Purchaser”). for Purposes of This Guaranty, the Term “Purchaser” Shall Include Any Assignee of or Successor in Interest to Purchaser Under the Acquisition Agreement

from 8-K 25 pages Option Agreement by and Among Aircraft Services Corporation as Asc, Sourcegas Holdings LLC as the Company, Black Hills Utility Holdings, Inc. as Buyer, Efs Services, LLC and Sourcegas Inc. Dated as of [ ]

from 8-K 77 pages Purchase and Sale Agreement Among Alinda Gas Delaware LLC, Alinda Infrastructure Fund I, L.P. and Aircraft Services Corporation as Sellers, and Black Hills Utility Holdings, Inc. as Buyer Dated as of July 12, 2015

from 10-Q 91 pages Purchase and Sale Agreement by and Among Black Hills Exploration and Production, Inc. Unit Petroleum Company Sundance Energy, Inc. Highline Exploration, Inc. Houston Energy, L.P. Nisku Royalty, LP Empire Oil Company and Kent M. Lynch as Sellers and Qep Energy Company, as Purchaser Dated as of August 23, 2012

from 8-K 84 pages Agreement and Plan of Merger Among Aquila, Inc., Great Plains Energy Incorporated, Gregory Acquisition Corp. and Black Hills Corporation Dated as of February 6, 2007

from 10-Q 48 pages Stock Purchase Agreement Between Xcel Energy Inc., as “Seller,” and Black Hills Corporation, as “Buyer” January 13, 2004