Exhibit A Joint Filing StatementJoint Filing Statement • February 24th, 2011 • Quicksilver Energy Lp • Crude petroleum & natural gas
We, the undersigned, hereby express our agreement that the attached Schedule 13D is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934. This agreement may be terminated with respect to the obligations to jointly file future amendments to such statement on Schedule 13D as to any of the undersigned upon such person giving written notice thereof to each of the other persons signatory hereto, at the principal office thereof.
LIMITED WAIVERLimited Waiver • February 24th, 2011 • Quicksilver Energy Lp • Crude petroleum & natural gas • New York
LIMITED WAIVER (this “Waiver”) dated as of February 23, 2011 of certain provisions of that certain letter agreement dated as of October 24, 2010 (the “Confidentiality Agreement”) by and between Quicksilver Resources Inc. (the “Company”) and Quicksilver Energy L.P. (“Quicksilver Energy”).
