Exhibit 10.1
FOURTH AMENDMENT TO COMBINED CREDIT AGREEMENTS
     THIS FOURTH AMENDMENT TO COMBINED CREDIT AGREEMENTS, dated as of June 20,
2008 (this “Amendment”), is entered into by and among QUICKSILVER RESOURCES
INC., a Delaware corporation (the “U.S. Borrower”), QUICKSILVER RESOURCES CANADA
INC., an Alberta, Canada corporation (the “Canadian Borrower”), each of the
Lenders (as defined in the U.S. Credit Agreement (as hereinafter defined)) party
hereto (together with its successors and assigns, the “U.S. Lenders”), each of
the Lenders (as defined in the Canadian Credit Agreement (as hereinafter
defined)) party hereto (together with its successors and assigns, the “Canadian
Lenders” and, together with the U.S. Lenders, the “Combined Lenders”), JPMORGAN
CHASE BANK, N.A., as global administrative agent (in such capacity, the “Global
Administrative Agent”), and JPMORGAN CHASE BANK, N.A., TORONTO BRANCH, as
Canadian administrative agent (in such capacity, the “Canadian Administrative
Agent”).
W I T N E S S E T H:
     1. The U.S. Borrower, the Global Administrative Agent, the other Agents
party thereto and the U.S. Lenders are parties to that certain Amended and
Restated Credit Agreement dated as of February 9, 2007 (as amended,
supplemented, restated or otherwise modified from time to time, the “U.S. Credit
Agreement”), pursuant to which the U.S. Lenders agreed to make loans to, and
extensions of credit on behalf of, the U.S. Borrower.
     2. The Canadian Borrower, the Global Administrative Agent, the Canadian
Administrative Agent, the other Agents party thereto and the Canadian Lenders
are parties to that certain Amended and Restated Credit Agreement dated as of
February 9, 2007 (as amended, supplemented, restated or otherwise modified from
time to time, the “Canadian Credit Agreement” and, together with the U.S. Credit
Agreement, the “Combined Credit Agreements”), pursuant to which the Canadian
Lenders agreed to make loans to, and extensions of credit on behalf of, the
Canadian Borrower.
     3. The parties to the Combined Credit Agreements intend to amend the
Combined Credit Agreements as follows:
     NOW, THEREFORE, in consideration of the premises and the mutual covenants
herein contained, the parties hereto agree as follows:
     I. Amendments to U.S. Credit Agreement.
     A. The definition of “Permitted Senior Notes Debt” contained in Section 1.1
of the U.S. Credit Agreement is hereby amended in its entirety to read as
follows:
     “Permitted Senior Notes Debt” means any unsecured Indebtedness (in addition
to, and not including, Existing Subordinate Debt) of the Borrower, and any
Guarantees thereof by Subsidiaries, incurred or assumed after the date of this
Agreement and resulting from one or more issuances of Borrower’s senior
unsecured notes and/or senior unsecured subordinate notes in an aggregate

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outstanding principal balance at any time of not greater than U.S. $500,000,000,
including all renewals, refinancings, replacements, and extensions thereof to
the extent permitted hereunder and made in accordance with the terms of the
Combined Loan Documents (including Section 7.14), provided, that, except, in the
case of each of clauses (ii), (iv) and (vi) below, to the extent the terms of
such Indebtedness as to the matters addressed in such clauses are materially the
same or at least as favorable for the Borrower as the terms of the Existing
Subordinate Notes issued pursuant to the Existing Subordinated Note Indenture
(disregarding for purposes of this exception, in the case of any issuance of the
Borrower’s senior unsecured notes, any provisions of the Existing Subordinate
Notes and/or the Existing Subordinated Note Indenture that expressly or
effectively operate to subordinate or condition any right or obligation of the
Borrower to make any payment (whether in connection with a purchase, repurchase,
redemption, defeasance, prepayment or otherwise) under or in respect of all or
any of the Existing Subordinate Notes in relation to any other Indebtedness),
all such Indebtedness (i) has a maturity date at least six (6) months after the
Maturity Date, (ii) except to the extent any such prepayments are made in
accordance with subsection (y) to the proviso in Section 7.14, is not permitted
to be prepaid (other than by the conversion of any such Indebtedness into the
capital stock of the Borrower) without the written consent of the Global
Administrative Agent and the Majority Lenders, (iii) has a coupon not in excess
of nine percent (9%), (iv) contains covenants not materially more onerous to
Borrower and its Subsidiaries than those contained in the Combined Loan
Documents, (v) requires no scheduled principal amortization prior to the sixth
anniversary of the Closing Date, and (vi) is otherwise on market terms and
conditions as of the time of issuance thereof.
     B. Section 7.14 of the U.S. Credit Agreement is hereby amended by inserting
the following sentence at the end of such Section:
     “Notwithstanding anything to the contrary contained herein or in any other
Combined Loan Document, the provisions of this Section 7.14 (or any comparable
provisions in any Combined Loan Document) shall in no event or circumstance
apply to or restrict any payment (whether in respect of a purchase, repurchase,
redemption, defeasance, prepayment or otherwise) that the Borrower is obligated
to make in respect of any of the Borrower’s senior unsecured notes that
constitute Permitted Senior Notes Debt.”
     II. Amendment to Canadian Credit Agreement. The definition of “Permitted
Senior Notes Debt” contained in Section 1.1 of the Canadian Credit Agreement is
hereby amended in its entirety to read as follows:
     “Permitted Senior Notes Debt” means any unsecured Indebtedness (in addition
to, and not including, Existing Subordinate Debt) of the Parent, and any
Guarantees thereof by Subsidiaries, incurred or assumed after the date of this
Agreement and resulting from one or more issuances of Parent’s senior unsecured
notes and/or senior unsecured subordinate notes in an aggregate outstanding
principal balance at any time of not greater than U.S. $500,000,000, including
all

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renewals, refinancings, replacements, and extensions thereof to the extent
permitted hereunder and made in accordance with the terms of the Combined Loan
Documents (including Section 7.14 of the U.S. Credit Agreement), provided, that,
except, in the case of each of clauses (ii), (iv) and (vi) below, to the extent
the terms of such Indebtedness as to the matters addressed in such clauses are
materially the same or at least as favorable for the Parent as the terms of the
Existing Subordinate Notes issued pursuant to the Existing Subordinated Note
Indenture (disregarding for purposes of this exception, in the case of any
issuance of the Parent’s senior unsecured notes, any provisions of the Existing
Subordinate Notes and/or the Existing Subordinated Note Indenture that expressly
or effectively operate to subordinate or condition any right or obligation of
the Parent to make any payment (whether in connection with a purchase,
repurchase, redemption, defeasance, prepayment or otherwise) under or in respect
of all or any of the Existing Subordinate Notes in relation to any other
Indebtedness), all such Indebtedness (i) has a maturity date at least six
(6) months after the Maturity Date, (ii) except to the extent any such
prepayments are made in accordance with subsection (y) to the proviso in
Section 7.14 of the U.S. Credit Agreement, is not permitted to be prepaid (other
than by the conversion of any such Indebtedness into the capital stock of the
Parent) without the written consent of the Global Administrative Agent and the
Majority Lenders, (iii) has a coupon not in excess of nine percent (9%),
(iv) contains covenants not materially more onerous to Parent and its
Subsidiaries than those contained in the Combined Loan Documents, (v) requires
no scheduled principal amortization prior to the sixth anniversary of the
Closing Date, and (vi) is otherwise on market terms and conditions as of the
time of issuance thereof.
     III. Effectiveness. This Amendment shall become effective as of the date
(the “Effective Date”) when the Global Administrative Agent shall have received
counterparts hereof duly executed by the U.S. Borrower, the Canadian Borrower,
the Global Administrative Agent, the Canadian Administrative Agent and the
Majority Lenders (or, in the case of any party as to which an executed
counterpart shall not have been received, telegraphic, telex, or other written
confirmation from such party of execution of a counterpart hereof by such
party).
     IV. Reaffirmation of Representations and Warranties. To induce the Combined
Lenders and the Global Administrative Agent to enter into this Amendment, the
U.S. Borrower and the Canadian Borrower hereby reaffirm, as of the date hereof,
the following:
          (i) The representations and warranties of each Loan Party (as such
term is defined in the U.S. Credit Agreement and the Canadian Credit Agreement,
collectively, the “Combined Loan Parties”) set forth in the Combined Loan
Documents to which it is a party are true and correct on and as of the date
hereof (or, if stated to have been made expressly as of an earlier date, were
true and correct in all material respects as of such date and, except to the
extent waived in writing by the Combined Lenders, the Required Lenders, the
Majority Lenders, the U.S. Lenders or the U.S. Required Lenders, as applicable).

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          (ii) Each of the Combined Loan Parties (a) is a corporation or limited
partnership duly incorporated or organized (as applicable), validly existing and
in good standing under the laws of its jurisdiction of incorporation or
organization, (b) has all corporate or limited partnership power (as applicable)
and all material governmental licenses, authorizations, consents and approvals
required to carry on its businesses as now conducted and as proposed to be
conducted, and (c) is duly qualified to transact business as a foreign
corporation or limited partnership in each jurisdiction where a failure to be so
qualified would reasonably be expected to have a Material Adverse Effect.
          (iii) The execution, delivery and performance of this Amendment and
the other Combined Loan Documents by each Combined Loan Party (to the extent
each Combined Loan Party is a party to this Amendment and such Combined Loan
Documents) (a) are within such Combined Loan Party’s corporate or limited
partnership powers, (b) when executed will be duly authorized by all necessary
corporate or limited partnership action, (c) require no action by or in respect
of, or filing with, any Governmental Authority (other than (1) actions or
filings pursuant to the Exchange Act and (2) actions or filings that have been
taken or made and are in full force and effect) and (d) do not contravene, or
constitute a default under, any provision of applicable Governmental Rule
(including, without limitation, Regulation U) or of the articles or certificate
of incorporation, bylaws, regulations, partnership agreement or comparable
charter documents of any Combined Loan Party or of any agreement, judgment,
injunction, order, decree or other instrument binding upon any Combined Loan
Party or result in the creation or imposition of any Lien on any Borrowing Base
Property or Collateral other than the Liens securing the Combined Obligations.
          (iv) This Amendment and each other Combined Loan Document constitutes,
or when executed and delivered will constitute, valid and binding obligations of
each Combined Loan Party which is a party thereto, enforceable against each such
Combined Loan Party which executes the same in accordance with its terms except
as the enforceability thereof may be limited by (a) bankruptcy, insolvency,
reorganization, moratorium, or similar Governmental Rules affecting creditors’
rights generally, and (b) equitable principles of general applicability (whether
enforcement is sought by proceedings at law or in equity).
          (v) Neither a Default nor an Event of Default has occurred and will
exist under either Combined Credit Agreement after giving effect to the
transactions contemplated by this Amendment or the other Combined Loan
Documents. Neither the U.S. Borrower or any of its Subsidiaries nor the Canadian
Borrower or any of its Subsidiaries is in default under, nor has any event or
circumstance occurred which, but for the expiration of any applicable grace
period or the giving of notice, or both, would constitute a default under, any
Material Agreement to which the U.S. Borrower or any of its Subsidiaries or the
Canadian Borrower or any of its Subsidiaries is a party or by which the U.S.
Borrower or any of its Subsidiaries or the Canadian Borrower or any of its
Subsidiaries is bound which default would reasonably be expected to have a
Material Adverse Effect. The U.S. Borrower is in compliance with the financial
covenants set forth in Article VI of the U.S. Credit Agreement.

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          (vi) No event or events have occurred since December 31, 2007 which
individually or in the aggregate would reasonably be expected to have a Material
Adverse Effect.
     V. Defined Terms. Terms used herein when defined in the U.S. Credit
Agreement (including, to the extent applicable, after giving effect to this
Amendment) shall have the same meanings herein unless the context otherwise
requires.
     VI. Reaffirmation of Combined Credit Agreements. This Amendment shall be
deemed to be an amendment to the Combined Credit Agreements, and the Combined
Credit Agreements, as amended hereby, are hereby ratified, approved and
confirmed in each and every respect. All references to the Combined Credit
Agreements herein and in any other document, instrument, agreement or writing
shall hereafter be deemed to refer to the Combined Credit Agreements as amended
hereby.
     VII. Governing Law. THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF TEXAS.
     NOTWITHSTANDING THE FOREGOING SENTENCE AND AFTER GIVING EFFECT TO THE
TEXTUAL AMENDMENTS CONTAINED IN SECTIONS I AND II OF THIS AMENDMENT, (i) THE
U.S. CREDIT AGREEMENT (AS AMENDED HEREBY) SHALL CONTINUE TO BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAW SPECIFIED IN SECTION 10.9(a) OF THE U.S.
CREDIT AGREEMENT, AND (ii) THE CANADIAN CREDIT AGREEMENT (AS AMENDED HEREBY)
SHALL CONTINUE TO BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW
SPECIFIED IN SECTION 10.9(a) OF THE CANADIAN CREDIT AGREEMENT.
     VIII. Severability of Provisions. Any provision of this Amendment held to
be invalid, illegal or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such invalidity, illegality or
unenforceability without affecting the validity, legality and enforceability of
the remaining provisions hereof; and the invalidity of a particular provision in
a particular jurisdiction shall not invalidate such provision in any other
jurisdiction.
     IX. Counterparts. This Amendment may be executed in counterparts (and by
different parties hereto on different counterparts), each of which shall
constitute an original, but all of which when taken together shall constitute a
single contract. Delivery of an executed counterpart of a signature page of this
Amendment by telecopy (or other electronic transmission acceptable to the Global
Administrative Agent) shall be effective as delivery of a manually executed
counterpart of this Amendment.
     X. Headings. Article and Section headings used herein are for convenience
of reference only, are not part of this Amendment and shall not affect the
construction of, or be taken into consideration in interpreting, this Amendment.
     XI. Successors and Assigns. This Amendment shall be binding upon and inure
to the benefit of the parties hereto and their respective successors and assigns
permitted hereby (including any Affiliate of an Issuing Bank that issues any
Letter of Credit), except that neither

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the U.S. Borrower nor the Canadian Borrower may assign or otherwise transfer any
of its rights or obligations hereunder without the prior written consent of the
Global Administrative Agent, each Issuing Bank and each Combined Lender (and any
attempted assignment or transfer by either the U.S. Borrower or the Canadian
Borrower without such consent shall be null and void).
     XII. No Oral Agreements. THIS AMENDMENT, THE COMBINED CREDIT AGREEMENTS, AS
AMENDED HEREBY, AND THE OTHER COMBINED LOAN DOCUMENTS REPRESENT THE FINAL
AGREEMENT BETWEEN AND AMONG THE PARTIES WITH RESPECT TO THE SUBJECT MATTER
HEREOF AND THEREOF AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES.
     XIII. Loan Document. This Amendment constitutes a “Loan Document,” a
“Canadian Loan Document” and a “Combined Loan Document” under and as defined in
the U.S. Credit Agreement, and a “Loan Document,” a “U.S. Loan Document” and a
“Combined Loan Document” under and as defined in the Canadian Credit Agreement.
[Signature Pages to Follow]

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     IN WITNESS WHEREOF, the U.S. Borrower, the Canadian Borrower, the
undersigned Combined Lenders, the Global Administrative Agent and the Canadian
Administrative Agent have executed this Amendment as of the date first above
written.
U.S. BORROWER
QUICKSILVER RESOURCES INC.,
a Delaware corporation, as U.S. Borrower

                      By:   /s/ MarLu Hiller                  
 
  Name:       MarLu Hiller    
 
  Title:       Vice President – Treasurer    

CANADIAN BORROWER
QUICKSILVER RESOURCES CANADA INC.,
an Alberta, Canada corporation, as Canadian Borrower

                      By:   /s/ MarLu Hiller                  
 
  Name:       MarLu Hiller    
 
  Title:       Vice President – Treasurer    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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AGENTS AND COMBINED LENDERS
JPMORGAN CHASE BANK, N.A., as Global Administrative
Agent and as a U.S. Lender

                      By:   /s/ J. Scott Fowler                  
 
  Name:       J. Scott Fowler    
 
  Title:       Senior Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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JPMORGAN CHASE BANK, N.A., TORONTO
BRANCH, as a Canadian Administrative Agent
and as a Canadian Lender

                      By:   /s/ Michael N. Tam                  
 
  Name:       Michael N. Tam    
 
  Title:       Senior Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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BANK OF AMERICA, N.A., as a U.S. Lender

                      By:   /s/ Ronald E. McKaig                  
 
  Name:       Ronald E. McKaig    
 
  Title:       Senior Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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BNP PARIBAS, as a U.S. Lender

                      By:   /s/ Betsy Jocher                  
 
  Name:
Title:       Betsy Jocher
Director    
 
                    By:   /s/ Richard Hawthorne                  
 
  Name:       Richard Hawthorne    
 
  Title:       Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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FORTIS CAPITAL CORP., as a U.S. Lender

                      By:   /s/ Michael Jones                  
 
  Name:       Michael Jones    
 
  Title:       Director    
 
                    By:   /s/ Ilene Fowler                  
 
  Name:       Ilene Fowler    
 
  Title:       Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              THE BANK OF NOVA SCOTIA, as a U.S. Lender
 
       
 
  By:   /s/ David Mills
 
       
 
  Name:   David Mills
 
  Title:   Director

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              DEUTSCHE BANK TRUST COMPANY     AMERICAS, as a U.S. Lender
 
       
 
  By:   /s/ Erin Morrissey
 
       
 
  Name:   Erin Morrissey
 
  Title:   Vice President
 
       
 
  By:   /s/ Dusan Lazarov
 
       
 
  Name:   Dusan Lazarov
 
  Title:   Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              THE ROYAL BANK OF SCOTLAND plc, as a U.S. Lender
 
       
 
  By:   /s/ Robert E. Poirrer, Jr.
 
       
 
  Name:   Robert E. Poirrier, Jr.
 
  Title:   Senior Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              CALYON NEW YORK BRANCH, as a U.S. Lender
 
       
 
  By:    
 
       
 
  Name:    
 
       
 
  Title:    
 
       
 
       
 
  By:    
 
       
 
  Name:    
 
       
 
  Title:    
 
       

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              CITIBANK, N.A., as a U.S. Lender
 
       
 
  By:   /s/ Todd Mogil
 
       
 
  Name:   Todd Mogil
 
  Title:   Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              UNION BANK OF CALIFORNIA, N.A., as a U.S. Lender
 
       
 
  By:    
 
       
 
  Name:    
 
       
 
  Title:    
 
       

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              WELLS FARGO BANK, N.A., as a U.S. Lender
 
       
 
  By:   /s/ David C. Brooks
 
       
 
  Name:   David C. Brooks
 
  Title:   Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              TORONTO DOMINION (TEXAS) LLC, as a U.S. Lender
 
       
 
  By:   /s/ Debbi L. Brito
 
       
 
  Name:   Debbi L. Brito
 
  Title:   Authorized Signatory

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              U.S. BANK NATIONAL ASSOCIATION, as a U.S. Lender
 
       
 
  By:   /s/ Daria Mahoney
 
       
 
  Name:   Daria Mahoney
 
  Title:   Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              SUMITOMO MITSUI BANKING CORPORATION, as a U.S. Lender
 
       
 
  By:    
 
       
 
  Name:    
 
       
 
  Title:    
 
       

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              COMPASS BANK, as a U.S. Lender
 
       
 
  By:   /s/ Murray E. Brasseux
 
       
 
  Name:   Murray E. Brasseux
 
  Title:   Executive Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              SOCIÉTÉ GÉNÉRALE, as a U.S. Lender
 
       
 
  By:   /s/ Stephen W. Warfel
 
       
 
  Name:   Stephen W. Warfel
 
  Title:   Managing Director

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              COMERICA BANK, as a U.S. Lender
 
       
 
  By:   /s/ Peter L. Sefzik
 
       
 
  Name:   Peter L. Sefzik
 
  Title:   Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              STERLING BANK, as a U.S. Lender
 
       
 
  By:   /s/ Melissa Bauman
 
       
 
  Name:   Melissa Bauman
 
  Title:   Senior Vice President

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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              CIBC INC., as a U.S. Lender
 
       
 
  By:   /s/ Kathryn G. Casparian
 
       
 
  Name:   Kathryn G. Casparian
 
  Title:   Chief Administrative Officer

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  KEYBANK, N.A., as a U.S. Lender
 
           
 
  By:        
 
  Name:  
 
   
 
  Title:  
 
   
 
     
 
   

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  EXPORT DEVELOPMENT CANADA, as a U.S. Lender
 
           
 
  By:
Name:   /s/ Janine Dopson
 
Janine Dopson    
 
  Title:   Loan Asset Manager    
 
           
 
  By:
Name:   /s/ Howard Clysdale
 
Howard Clysdale    
 
  Title:   Portfolio Manager    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  BARCLAYS BANK PLC, as a U.S. Lender
 
           
 
  By:
Name:   /s/ Joseph Gyurindak
 
Joseph Gyurindak    
 
  Title:   Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  CREDIT SUISSE, CAYMAN ISLANDS BRANCH, as a U.S. Lender
 
           
 
  By:
Name:   /s/ Vanessa Gomez
 
Vanessa Gomez    
 
  Title:   Director    
 
           
 
  By:
Name:   /s/ Nupur Kumar
 
Nupur Kumar    
 
  Title:   Associate    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  BANK OF AMERICA, N.A. (by its Canada branch), as a Canadian
Lender
 
           
 
  By:
Name:   /s/ Medina Sales De Andrade
 
Medina Sales De Andrade    
 
  Title:   Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  BNP PARIBAS (CANADA), as a Canadian Lender
 
           
 
  By:
Name:   /s/ Chris Rice
 
Chris Rice    
 
  Title:   Vice President    
 
           
 
  By:
Name:   /s/ Michael Gosselin
 
Michael Gosselin    
 
  Title:   Managing Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  FORTIS CAPITAL (CANADA) LTD., as a Canadian Lender
 
           
 
  By:
Name:   /s/ Peter Boogers
 
Peter Boogers    
 
  Title:   Director    
 
           
 
  By:
Name:   /s/ Doug Clark
 
Doug Clark    
 
  Title:   Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  THE BANK OF NOVA SCOTIA, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Andrew Kellock
 
Andrew Kellock    
 
  Title:   Director    
 
           
 
  By:
Name:   /s/ Todd Kennedy
 
Todd Kennedy    
 
  Title:   Associate    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  DEUTSCHE BANK AG CANADA BRANCH, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Daniel W. Sooley
 
Daniel W. Sooley    
 
  Title:   Chief Legal Officer    
 
           
 
  By:
Name:   /s/ Marcellus Leung
 
Marcellus Leung    
 
  Title:   Assistant Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  CITIBANK, N.A., CANADIAN BRANCH, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Ivan Davey
 
Ivan Davey    
 
  Title:   Authorised Signer    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  UNION BANK OF CALIFORNIA, N.A., CANADA BRANCH, as a Canadian
Lender
 
           
 
  By:        
 
  Name:  
 
   
 
  Title:  
 
   
 
     
 
   

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  WELLS FARGO FINANCIAL CORPORATION CANADA,
as a Canadian Lender
 
           
 
  By:
Name:   /s/ Nick Scarfo
 
Nick Scarfo    
 
  Title:   Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  THE TORONTO-DOMINION BANK, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Debbi L. Brito
 
Debbi L. Brito    
 
  Title:   Authorized Signatory    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  U.S. BANK NATIONAL ASSOCIATION, as a Canadian Lender
 
           
 
  By:        
 
  Name:  
 
   
 
  Title:  
 
   
 
     
 
   

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  SUMITOMO MITSUI BANKING CORPORATION OF CANADA,
as a Canadian Lender
 
           
 
  By:        
 
  Name:  
 
   
 
  Title:  
 
   
 
     
 
   

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  SOCIÉTÉ GÉNÉRALE (CANADA BRANCH), as a Canadian
Lender
 
           
 
  By:   /s/ David Baldoni    
 
  Name:  
 
David Baldoni    
 
  Title:   Managing Director    
 
           
 
  By:
Name:   /s/ Paul Primavesi
 
Paul Primavesi    
 
  Title:   Vice President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  COMERICA BANK, CANADA BRANCH, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Omer Ahmed
 
Omer Ahmed    
 
  Title:   Portfolio Manager    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  CANADIAN IMPERIAL BANK OFCOMMERCE,
as a Canadian Lender
 
           
 
  By:
Name:   /s/ Randy Geislinger
 
Randy Geislinger    
 
  Title:   Executive Director    
 
           
 
  By:
Name:   /s/ Chris Perks
 
Chris Perks    
 
  Title:   Executive Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  KEYBANK, N.A., as a Canadian Lender
 
           
 
  By:        
 
  Name:  
 
   
 
  Title:  
 
   
 
     
 
   

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  BARCLAYS BANK PLC, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Joseph Gyurindak
 
Joseph Gyurindak    
 
  Title:   Director    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.

 

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                  CREDIT SUISSE, TORONTO BRANCH, as a Canadian Lender
 
           
 
  By:
Name:   /s/ Alain Daoust
 
Alain Daoust    
 
  Title:   Director    
 
           
 
  By:
Name:   /s/ Steve W. Fuh
 
Steve W. Fuh    
 
  Title:   Vice-President    

[Signature Page]
Fourth Amendment to Combined Credit Agreements
Quicksilver Resources Inc.