Document:

exv10w20

 

Exhibit 10.20

ORIGINAL

Agreement on Joint Cooperation

PARTIES:

Sino Geophysical Co., Ltd

Pacific Asia Petroleum Inc.

 

 

This Agreement on Joint Cooperation (“Agreement”) dated May 31, 2007 is executed by and
between Sino Geophysical Co., Ltd., a company registered in Beijing, China (“Party A”) and Pacific
Asia Petroleum Inc. a company registered in Delaware, United States of America (“Party B”).

WITNESSETH:

     WHEREAS, Party A is a world class energy services company specializing in seismic
acquisition, processing and analysis, and has recently expanded its
scope of business and operations
to include development of oil and gas properties throughout Asia and
the Pacific Rim;

     WHEREAS, Party B is a publicly traded company incorporated in the United States of America
engaged in the business of oil and gas exploration, development, production and trading in Asia
and the Pacific Rim countries; and

     WHEREAS,
Party A and Party B have met several times to discuss their intent to work together
and identify mutually acceptable ventures in Asia that they can jointly develop to bring value to
their respective shareholders and/or investors.

     NOW, THEREFORE, in consideration of the foregoing, and for other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, the Parties hereto agree
as follows:

Section 1

Mutual Cooperation

	1.1	 	Pursuant to the mutual desire by both Party A and Party B to identify energy
projects in the People’s Republic of China, and throughout Asia that will bring
value to their respective investors and/or shareholders, the Parties hereto will
establish a mutually acceptable procedure to keep each other informed of projects
they are pursuing which they respectively believe would meet the financial and
operational objectives and expectations for the other party.
	 
	1.2	 	Party B will use the services of Party A for its seismic acquisition and processing
operations, provided that Party A’s terms are competitive with respect to price (a
standard should be negotiated in order to avoid dispute), technology and quality
and that mutually acceptable terms can be negotiated.

 

 

	1.3	 	Party A will provide to Party B the opportunity to participate in oil and gas
exploration and development projects that it is pursuing, or acquires, subject to
agreement on mutually acceptable terms.

Section 2

Confidentiality

2.1 The Parties hereto shall maintain all data provided by the other Party strictly
confidential and therefore agree not to disclose trade or otherwise divulge such data to
any third party, other than to its affiliates, without the prior written consent of the other
Party. In the event of disclosure to any of its affiliates, such affiliate shall also be subject
to the terms of this Agreement. Notwithstanding the above, the Party
receiving the data
shall be entitled to disclose the data without the other Party’s prior written consent to such
of the following persons to the extent that they have a clear need to know and to be
exposed to the data:

	 	A.	 	Employees, officers and directors of the Party receiving the data;
	 
	 	B.	 	Employees, officers and directors of affiliates;
	 
	 	C.	 	Any consultant or agent retained by a Party or its affiliate; or
	 
	 	D.	 	Any bank or other financial institution or entity funding or proposing to
fund a Party’s participation in a venture, including any consultant retained by such
bank or other financial institution or entity.

The Party receiving the data shall be responsible for ensuring that all persons to whom the
confidential information is disclosed under this Agreement shall keep such information
confidential and shall not disclose or divulge the same to any unauthorized person.

Prior
to making any such disclosures to persons under subparagraphs (C) and (D) above,
however, the Party receiving the data shall obtain an undertaking of confidentiality
substantially in the same
form and content as this Agreement, from each such
person.

2.2
Exception to the Confidential Designation of the Data.

The receiving Party may disclose the data without the disclosing Party’s prior written
consent only to the extent such information:

	 	A.	 	Is already known to the receiving Party as of the date of disclosure
hereunder;

 

 

	 	B.	 	Is already in possession of the public or becomes available to the public
other than through the act or omission of the receiving Party or of any
other person to whom the data is disclosed pursuant to this Agreement;
	 
	 	C.	 	Is acquired independently from a third party that represents that it has the
right to disseminate such information at the time it is acquired by the
receiving Party; or
	 
	 	D.	 	Is developed by the receiving Party independently from data received from
the disclosing Party.

Section 3

Additional Provision

	3.	 	The Parties hereto shall promise that:

	 	A.	 	During the cooperation period between both parties, in the event Patty B
receives a proposal along with information and data from Party A on a particular
opportunity (as described in Section 1 above) which Party B has not received earlier
from another source, then Party B (if Party B decides to participate) shall be
required to work exclusively with Party A to acquire such interest cooperatively with
Party A, and pursuant to mutually acceptable terms. If Party B decides not
to participate, then Party B shall return to Party A all of the data and information
it received from Party A. In the event that Party B decides not to participate, then
Party B shall not disclose such data and information to a third party. In the event
that Party B violates this provision, and acquires an interest in the opportunity
without Party A, then Party B will be entitled to a penalty which the parties shall
agree on within 10 days of this agreement by exchange of
letters. In addition, in the
event of such a violation, then Party A is entitled to unilaterally terminate the
cooperation between the two sides and has its rights protected under
the law.
	 
	 	B.	 	For all the projects provided by Party A, Party B shall have the option to
decide whether it wants to participate or not (including the choice of third-party partners, etc) and Party A shall have the right to decide if it wants to
operate.
	 
	 	C.	 	Specific dividends for both parties under the projects where they cooperate
jointly shall be according to the proportionate interest each has in the specific
project share in the project.

 

 

	 	D.	 	For projects where Party A and Party B jointly cooperate as partners, and
where Party A has devoted considerable effort and research, including the data
collection and technical research, and such work reduces the risks in exploration and
development and improves the rate of return on investment, it is agreed between Party
A and Party B that some form of compensation shall be negotiated and given to Party A
in recognition of such intangible contribution.

	4.	 	Applicable Law

The laws of the People’s The Republic of China shall apply to this Agreement.

	5.	 	Counterparts

This Agreement may be executed in two or more counterparts, each of which shall be
deemed an original and all of which together shall constitute one and
the same instrument.
It shall not be necessary that any single counterpart be executed by all parties so long
as at least one counterpart is executed by each party.

	6.	 	Entire Agreement of the Parties.

This Agreement contains the entire agreement between the parties concerning the Data and
supersedes any prior agreements between the parties relating to the subject matter hereof,
whether written or oral. Termination

	7.	 	Modification of this Agreement.

No amendments, changes or modifications to this Agreement shall he valid except if the
same are in writing and signed by a duly legal person or an authorized representative of
each Party herein.

	8.	 	Language

This Agreement shall be signed in both Chinese and English. If some articles of this
Agreement need to be changed to account for special situations, this can be effected by
Party A and Party B negotiating and signing mutually acceptable terms or revisions to this
Agreement.

 

 

	9.	 	Miscellaneous

Other terms & conditions not mentioned in this Agreement shall be settled by negotiation
between the two Parties.

     IN
WITNESS WHEREOF, the Parties have executed this Agreement as of the date signed.

Authorized signatories to this Agreement:

	 	 	 	 	 	 	 
	Party A: Sino Geophysical Co., Ltd

	 	 	 	Party B. Pacific Asia Petroleum Inc	 	 
	 
	 	 	 	 	 	 
	/s/
[ILLEGIBLE]
 

	 	 	 	/s/ Frank C. Ingriselli
 

	 	 
	President & CEO

	 	 	 	President & CEOexv10w1

 

EXECUTION COPY

 

CREDIT AGREEMENT

DATED AS OF

AUGUST 10, 2007

AMONG

QUICKSILVER GAS SERVICES LP,

AS BORROWER,

THE LENDERS PARTY HERETO,

BANK OF AMERICA, N.A.,

AS ADMINISTRATIVE AGENT,

BNP PARIBAS,

AS SYNDICATION AGENT

AND

JPMORGAN CHASE BANK, N.A.,

THE ROYAL BANK OF SCOTLAND plc

AND

FORTIS CAPITAL CORP.,

AS CO-DOCUMENTATION AGENTS

 

BANC OF AMERICA SECURITIES LLC

AND

BNP PARIBAS SECURITIES CORP.,

AS CO-LEAD ARRANGERS AND JOINT BOOKRUNNERS

 

 

 

TABLE OF CONTENTS

	 	 	 	 	 
	 	 	Page No.	 
	
ARTICLE I

DEFINITIONS
	 
	 	 	 	 
	Section 1.01 Defined Terms
	 	 	1	 
	Section 1.02 Classification of Loans and Borrowings
	 	 	33	 
	Section 1.03 Terms Generally
	 	 	33	 
	Section 1.04 Accounting Terms; GAAP
	 	 	33	 
	Section 1.05 Letter of Credit Amounts
	 	 	34	 
	Section 1.06 Designation of Material Subsidiaries
	 	 	34	 
	Section 1.07 Rounding
	 	 	34	 
	Section 1.08 Times of Day
	 	 	34	 
	 
	 	 	 	 
	
ARTICLE II

THE CREDITS
	 
	 	 	 	 
	Section 2.01 Revolving Commitments
	 	 	34	 
	Section 2.02 Loans and Borrowings
	 	 	34	 
	Section 2.03 Requests for Revolving Borrowings
	 	 	35	 
	Section 2.04 Funding of Borrowings
	 	 	36	 
	Section 2.05 Swingline Loans
	 	 	37	 
	Section 2.06 Letters of Credit
	 	 	39	 
	Section 2.07 Interest Elections
	 	 	48	 
	Section 2.08 Voluntary Termination, Reduction and Increase of Commitments; Extension of Maturity Date
	 	 	49	 
	
Section 2.09 Repayment of Loans; Evidence of Debt
	 	 	53	 
	Section 2.10 Prepayment of Loans; Commitment Reductions
	 	 	53	 
	Section 2.11 Fees
	 	 	55	 
	Section 2.12 Interest
	 	 	56	 
	Section 2.13 Alternate Rate of Interest
	 	 	57	 
	Section 2.14 Illegality
	 	 	57	 
	Section 2.15 Increased Costs
	 	 	58	 
	Section 2.16 Break Funding Payments
	 	 	59	 
	Section 2.17 Taxes
	 	 	60	 
	Section 2.18 Payments Generally; Pro Rata Treatment; Sharing of Set-offs
	 	 	62	 
	Section 2.19 Mitigation Obligations; Replacement of Lenders
	 	 	64	 
	 
	 	 	 	 
	
ARTICLE III

REPRESENTATIONS AND WARRANTIES
	 
	 	 	 	 
	Section 3.01 Existence and Power
	 	 	65	 
	Section 3.02 Credit Party and Governmental Authorization; Contravention
	 	 	65	 
	Section 3.03 Binding Effect
	 	 	66	 
	Section 3.04 Financial Condition; No Material Adverse Effect
	 	 	66	 
	Section 3.05 Properties
	 	 	66	 
	Section 3.06 Litigation and Environmental Matters
	 	 	69	 
	Section 3.07 Compliance with Laws and Agreements
	 	 	69	 

i

 

	 	 	 	 	 
	 	 	Page No.	 
	Section 3.08 Investment Company Status
	 	 	69	 
	Section 3.09 Taxes
	 	 	69	 
	Section 3.10 ERISA
	 	 	69	 
	Section 3.11 Disclosure
	 	 	70	 
	Section 3.12 Capital Structure
	 	 	70	 
	Section 3.13 Use of Loans
	 	 	70	 
	Section 3.14 Material Contracts
	 	 	70	 
	Section 3.15 Hedging Agreements
	 	 	71	 
	Section 3.16 Defaults
	 	 	71	 
	Section 3.17 Insurance
	 	 	71	 
	Section 3.18 Priority; Security Matters
	 	 	71	 
	Section 3.19 Licenses, Permits, Etc.
	 	 	71	 
	Section 3.20 Supplemental Indenture
	 	 	72	 
	 
	 	 	 	 
	
ARTICLE IV

CONDITIONS
	 
	 	 	 	 
	Section 4.01 Effective Date
	 	 	72	 
	Section 4.02 Each Credit Event
	 	 	74	 
	 
	 	 	 	 
	
ARTICLE V

SECURITY
	 
	 	 	 	 
	
ARTICLE VI

AFFIRMATIVE COVENANTS
	 
	 	 	 	 
	Section 6.01 Financial Statements and Other Information
	 	 	76	 
	Section 6.02 Notices of Certain Events
	 	 	78	 
	Section 6.03 Existence; Conduct of Business
	 	 	78	 
	Section 6.04 Payment of Obligations
	 	 	79	 
	Section 6.05 Maintenance of Properties; Insurance
	 	 	79	 
	Section 6.06 Books and Records; Inspection Rights
	 	 	80	 
	Section 6.07 Compliance with Laws
	 	 	81	 
	Section 6.08 Further Assurances
	 	 	81	 
	Section 6.09 Additional Collateral
	 	 	81	 
	Section 6.10 Environmental Matters
	 	 	83	 
	Section 6.11 Establishment of Bank Accounts
	 	 	83	 
	Section 6.12 Information Regarding Collateral
	 	 	84	 
	Section 6.13 Pledge of Equity Interests in non-Credit Parties
	 	 	84	 
	 
	 	 	 	 
	
ARTICLE VII

NEGATIVE COVENANTS
	 
	 	 	 	 
	Section 7.01 Indebtedness
	 	 	84	 
	Section 7.02 Liens
	 	 	86	 
	Section 7.03 Fundamental Changes
	 	 	86	 
	Section 7.04 Investments
	 	 	87	 
	Section 7.05 Restricted Payments
	 	 	87	 
	Section 7.06 Transactions with Affiliates
	 	 	88	 
	Section 7.07 Negative Pledge Agreements
	 	 	88	 
	Section 7.08 Sale and Leaseback Arrangements
	 	 	88	 
	Section 7.09 ERISA Compliance
	 	 	88	 

ii

 

	 	 	 	 	 
	 	 	Page No.	 
	Section 7.10 Sale of Mortgaged Properties
	 	 	88	 
	Section 7.11 Proceeds of Loans
	 	 	89	 
	Section 7.12 Additional Subsidiaries
	 	 	90	 
	Section 7.13 Consolidated Interest Coverage Ratio
	 	 	90	 
	Section 7.14 Consolidated Leverage Ratio
	 	 	90	 
	Section 7.15 Hedging Agreements
	 	 	90	 
	Section 7.16 Acquisitions
	 	 	91	 
	Section 7.17 Amendments to Organizational and Other Documents
	 	 	91	 
	Section 7.18 Parent Subordinated Note
	 	 	92	 
	Section 7.19 Supplemental Indenture
	 	 	92	 
	 
	 	 	 	 
	
ARTICLE VIII

EVENTS OF DEFAULT
	 
	 	 	 	 
	Section 8.01 Events of Default
	 	 	92	 
	Section 8.02 Application of Funds
	 	 	95	 
	 
	 	 	 	 
	
ARTICLE IX

THE AGENTS
	 
	 	 	 	 
	Section 9.01 Appointment and Authority
	 	 	96	 
	Section 9.02 Rights as a Lender
	 	 	96	 
	Section 9.03 Exculpatory Provisions
	 	 	97	 
	Section 9.04 Reliance by the Agents
	 	 	97	 
	Section 9.05 Delegation of Duties
	 	 	98	 
	Section 9.06 Resignation of the Administrative Agent
	 	 	98	 
	Section 9.07 Non-Reliance on the Agents and Other Lenders
	 	 	99	 
	Section 9.08 No Other Duties, Etc.
	 	 	99	 
	Section 9.09 Administrative Agent May File Proofs of Claim
	 	 	99	 
	Section 9.10 Collateral and Guaranty Matters
	 	 	100	 
	Section 9.11 Execution of Security Instruments
	 	 	100	 
	 
	 	 	 	 
	
ARTICLE X

MISCELLANEOUS
	 
	 	 	 	 
	Section 10.01 Notices; Electronic Communication
	 	 	101	 
	Section 10.02 Waivers; Amendments
	 	 	102	 
	Section 10.03 Expenses; Indemnity; Damage Waiver
	 	 	103	 
	Section 10.04 Successors and Assigns
	 	 	105	 
	Section 10.05 Survival
	 	 	109	 
	Section 10.06 Counterparts; Integration; Effectiveness
	 	 	109	 
	Section 10.07 Severability
	 	 	109	 
	Section 10.08 Right of Setoff
	 	 	109	 
	Section 10.09 Governing Law; Jurisdiction; Consent to Service of Process
	 	 	110	 
	Section 10.10 WAIVER OF JURY TRIAL
	 	 	111	 
	Section 10.11 Headings
	 	 	111	 
	Section 10.12 Confidentiality
	 	 	111	 
	Section 10.13 Interest Rate Limitation
	 	 	112	 
	Section 10.14 Secured Affiliate
	 	 	114	 
	Section 10.15 USA Patriot Act Notice
	 	 	114	 
	Section 10.16 Arrangers; Syndication Agent; Co-Documentation Agents; Other Agents
	 	 	114	 

iii

 

	 	 	 	 	 
	 	 	Page No.	 
	Section 10.17 Security Instruments
	 	 	115	 
	Section 10.18 Waiver of Consumer Credit Loans
	 	 	115	 
	Section 10.19 NO ORAL AGREEMENTS
	 	 	115	 
	Section 10.20 No Recourse to Parent
	 	 	115	 

iv

 

SCHEDULES:

	 	 	 	 	 
	Schedule 2.01

	 	-
	 	Commitments
	Schedule 3.06

	 	-
	 	Disclosed Matters
	Schedule 3.12

	 	-
	 	Capital Structure; Material Subsidiaries
	Schedule 3.14

	 	-
	 	List of Material Contracts
	Schedule 3.17

	 	-
	 	Insurance
	Schedule 7.01

	 	-
	 	Existing Indebtedness
	Schedule 7.02

	 	-
	 	Existing Liens
	Schedule 7.04

	 	-
	 	Investments
	Schedule 7.06

	 	-
	 	Transactions with Affiliates
	Schedule 7.07

	 	-
	 	Negative Pledge Agreements
	 
	 	 	 	 
	EXHIBITS:
	 	 	 	 
	 
	 	 	 	 
	Exhibit A

	 	-
	 	Form of Assignment and Acceptance
	Exhibit B-1

	 	-
	 	Form of Revolving Borrowing Request
	Exhibit B-2

	 	-
	 	Form of Interest Election Request (Revolving Borrowing)
	Exhibit B-3

	 	-
	 	Form of Swingline Borrowing Request
	Exhibit B-4

	 	-
	 	Form of Interest Election Request (Swingline Borrowing)
	Exhibit C-1

	 	-
	 	List of Security Instruments
	Exhibit C-2

	 	-
	 	Form of Mortgage
	Exhibit C-3

	 	-
	 	Form of Guaranty and Collateral Agreement
	Exhibit D

	 	-
	 	Form of Note
	Exhibit E

	 	-
	 	Form of Commitment Increase Certificate
	Exhibit F

	 	-
	 	Form of Additional Lender Certificate
	Exhibit G

	 	-
	 	Form of Parent Subordinated Note

v

 

LIST OF DEFINED TERMS

	 	 	 	 	 
	 	 	Page No.
	$
	 	 	10	 
	ABR
	 	 	1	 
	Acquisition
	 	 	1	 
	Acquisition Period
	 	 	1	 
	Act
	 	 	114	 
	Additional Lender
	 	 	50	 
	Additional Lender Certificate
	 	 	50	 
	Adjusted Eurodollar Rate
	 	 	2	 
	Administrative Agent
	 	 	2	 
	Administrative Questionnaire
	 	 	2	 
	Affiliate
	 	 	2	 
	Agents
	 	 	2	 
	Aggregate Credit Exposure
	 	 	2	 
	Agreement
	 	 	2	 
	Alternate Base Rate
	 	 	2	 
	Applicable Lending Office
	 	 	3	 
	Applicable Percentage
	 	 	3	 
	Applicable Rate
	 	 	3	 
	Approved Fund
	 	 	4	 
	Arrangers
	 	 	4	 
	Asset Disposition
	 	 	4	 
	Assignee Group
	 	 	4	 
	Assignment and Acceptance
	 	 	4	 
	Availability Period
	 	 	4	 
	Available Cash
	 	 	4	 
	Bank of America
	 	 	4	 
	BAS
	 	 	4	 
	BBA LIBOR
	 	 	12	 
	BNP Fee Letter
	 	 	13	 
	BNPPSC
	 	 	4	 
	Board
	 	 	5	 
	BofA Fee Letter
	 	 	13	 
	Borrower
	 	 	1	 
	Borrowing
	 	 	5	 
	Borrowing Request
	 	 	5	 
	Business Day
	 	 	5	 
	Capital Expenditures
	 	 	5	 
	Capital Lease Obligations
	 	 	5	 
	Cash Collateral
	 	 	5	 
	Cash Collateralization
	 	 	5	 
	Cash Collateralize
	 	 	46	 
	Cash Collateralized
	 	 	5	 

vi

 

	 	 	 	 	 
	 	 	Page No.
	Casualty Event
	 	 	5	 
	CERCLA
	 	 	6	 
	Change in Control
	 	 	6	 
	Change in Law
	 	 	6	 
	Class
	 	 	6	 
	Closing Date
	 	 	6	 
	Closing Distributions
	 	 	6	 
	Closing Transaction Documents
	 	 	6	 
	Closing Transactions
	 	 	6	 
	Code
	 	 	7	 
	Co-Documentation Agents
	 	 	7	 
	Collateral
	 	 	7	 
	Commitment
	 	 	7	 
	Commitment Increase Certificate
	 	 	50	 
	Commodity Swap Agreement
	 	 	7	 
	Common Units
	 	 	7	 
	Consolidated EBITDA
	 	 	7	 
	Consolidated Interest Coverage Ratio
	 	 	8	 
	Consolidated Leverage Ratio
	 	 	8	 
	Consolidated Net Income
	 	 	8	 
	Consolidated Net Interest Expense
	 	 	9	 
	Consolidated Subsidiaries
	 	 	9	 
	Consolidated Total Funded Debt
	 	 	9	 
	Contribution Agreement
	 	 	9	 
	control
	 	 	2	 
	controlled by
	 	 	2	 
	Cowtown Entities
	 	 	9	 
	Cowtown Gas
	 	 	9	 
	Cowtown Pipeline
	 	 	9	 
	Credit Exposure
	 	 	9	 
	Credit Parties
	 	 	10	 
	Credit Party
	 	 	10	 
	Current Information
	 	 	10	 
	Debt Offering
	 	 	10	 
	deeds
	 	 	67	 
	Default
	 	 	10	 
	Defensible Title
	 	 	10	 
	Disclosed Matters
	 	 	10	 
	disposal
	 	 	11	 
	Distribution
	 	 	10	 
	dollars
	 	 	10	 
	Effective Date
	 	 	10	 
	Eligible Assignee
	 	 	11	 
	Environmental Laws
	 	 	11	 
	Environmental Liability
	 	 	11	 
	Equity Interests
	 	 	11	 

vii

 

	 	 	 	 	 
	 	 	Page No.
	ERISA
	 	 	11	 
	ERISA Affiliate
	 	 	11	 
	Eurodollar
	 	 	12	 
	Eurodollar Rate
	 	 	12	 
	Events of Default
	 	 	92	 
	Exchange Act
	 	 	12	 
	Excluded Taxes
	 	 	12	 
	Federal Funds Effective Rate
	 	 	12	 
	Fee Letters
	 	 	13	 
	FERC
	 	 	13	 
	Financing Transactions
	 	 	13	 
	Fiscal Quarter
	 	 	13	 
	Fiscal Year
	 	 	13	 
	Foreign Entity
	 	 	13	 
	Foreign Lender
	 	 	13	 
	Foreign Subsidiary
	 	 	13	 
	Fund
	 	 	13	 
	Funded Indebtedness
	 	 	13	 
	GAAP
	 	 	14	 
	Gathering and Processing Agreement
	 	 	14	 
	General Partner
	 	 	14	 
	Governmental Authority
	 	 	14	 
	Governmental Rule
	 	 	14	 
	GP LLC Agreement
	 	 	14	 
	Guarantee
	 	 	14	 
	Guaranty and Collateral Agreement
	 	 	15	 
	Hazardous Material
	 	 	15	 
	Hedging Agreement
	 	 	15	 
	Highest Lawful Rate
	 	 	113	 
	Honor Date
	 	 	42	 
	Incumbent Directors
	 	 	15	 
	Indebtedness
	 	 	15	 
	Indemnified Taxes
	 	 	16	 
	Indemnitee
	 	 	104	 
	Interest Election Request
	 	 	16	 
	Interest Payment Date
	 	 	16	 
	Interest Period
	 	 	16	 
	Interest Rate Swap Agreement
	 	 	16	 
	Investment
	 	 	17	 
	IPO
	 	 	17	 
	ISP
	 	 	17	 
	Issuer Documents
	 	 	17	 
	L/C Advance
	 	 	17	 
	L/C Borrowing
	 	 	17	 
	L/C Credit Extension
	 	 	17	 
	L/C Issuer
	 	 	17	 

viii

 

	 	 	 	 	 
	 	 	Page No.
	L/C Obligations
	 	 	17	 
	Lender Indebtedness
	 	 	17	 
	Lenders
	 	 	17	 
	Letter of Credit Application
	 	 	18	 
	Letter of Credit Fee
	 	 	47	 
	Letters of Credit
	 	 	18	 
	Lien
	 	 	18	 
	Limited Partnership Agreement
	 	 	18	 
	Loan Documents
	 	 	18	 
	Loans
	 	 	18	 
	Major Asset
	 	 	18	 
	Margin Stock
	 	 	18	 
	Material Acquisition
	 	 	18	 
	Material Adverse Effect
	 	 	18	 
	Material Asset Disposition
	 	 	19	 
	Material Contracts
	 	 	19	 
	Material Indebtedness
	 	 	19	 
	Material Subsidiary
	 	 	19	 
	Maturity Date
	 	 	19	 
	Midstream Activities
	 	 	19	 
	Moody’s
	 	 	20	 
	Mortgaged Property
	 	 	20	 
	Mortgages
	 	 	20	 
	Multiemployer Plan
	 	 	20	 
	Net Cash Proceeds
	 	 	20	 
	Non-Consenting Lender
	 	 	65	 
	Non-Recourse Indebtedness
	 	 	20	 
	Notes
	 	 	21	 
	Omnibus Agreement
	 	 	21	 
	Operating
	 	 	21	 
	Operating GP
	 	 	21	 
	Operating Lease
	 	 	21	 
	Other Taxes
	 	 	21	 
	parent
	 	 	31	 
	Parent
	 	 	21	 
	Parent Credit Agreement
	 	 	21	 
	Parent Distribution
	 	 	22	 
	Parent Subordinated Note
	 	 	22	 
	Participant
	 	 	107	 
	Payment Dates
	 	 	22	 
	PBGC
	 	 	22	 
	Permitted Encumbrances
	 	 	22	 
	Permitted Investments
	 	 	25	 
	Person
	 	 	27	 
	Pipeline Systems
	 	 	27	 
	Plan
	 	 	27	 

ix

 

	 	 	 	 	 
	 	 	Page No.
	Pledging Subsidiary
	 	 	27	 
	Prime Rate
	 	 	27	 
	Private Investor Distribution
	 	 	28	 
	Processing Plants
	 	 	28	 
	Property
	 	 	28	 
	Purchase Debt
	 	 	28	 
	Quarterly Dates
	 	 	28	 
	RCRA
	 	 	11	 
	Register
	 	 	107	 
	Registration Statement
	 	 	28	 
	Regulation U
	 	 	28	 
	Reinvestment Notice
	 	 	28	 
	Reinvestment Period
	 	 	28	 
	Reinvestment Prepayment Amount
	 	 	29	 
	Related Parties
	 	 	29	 
	release
	 	 	11	 
	Required Lenders
	 	 	29	 
	Responsible Officer
	 	 	29	 
	Restricted Payment
	 	 	29	 
	Revolving Loan
	 	 	30	 
	rights of way
	 	 	66	 
	Rolling Period
	 	 	30	 
	S&P
	 	 	30	 
	Secondment Agreement
	 	 	30	 
	Secured Affiliate
	 	 	30	 
	Security Instruments
	 	 	30	 
	SFAS 133
	 	 	30	 
	SFAS 143
	 	 	30	 
	SFAS 144
	 	 	30	 
	Solvent
	 	 	30	 
	Specified Assets
	 	 	31	 
	Specified Rate
	 	 	31	 
	State Pipeline Regulatory Agency
	 	 	31	 
	Statutory Reserve Rate
	 	 	31	 
	subsidiary
	 	 	31	 
	Subsidiary
	 	 	32	 
	Supermajority Lenders
	 	 	32	 
	Supplemental Indenture
	 	 	32	 
	Sweep Accounts
	 	 	32	 
	Swingline Exposure
	 	 	32	 
	Swingline Lender
	 	 	32	 
	Swingline Loan
	 	 	32	 
	Syndication Agent
	 	 	32	 
	Taxes
	 	 	32	 
	Total Commitment
	 	 	32	 
	transfer
	 	 	88	 

x

 

	 	 	 	 	 
	 	 	Page No.
	Type
	 	 	32	 
	UCC
	 	 	32	 
	under common control with
	 	 	2	 
	Unreimbursed Amount
	 	 	42	 
	Wholly Owned Subsidiary
	 	 	33	 

11

 

CREDIT AGREEMENT

     THIS CREDIT AGREEMENT is entered into effective as of August 10, 2007, among QUICKSILVER GAS
SERVICES LP, a Delaware limited partnership (the “Borrower”), the LENDERS party hereto,
BANK OF AMERICA, N.A., as the Administrative Agent, BNP PARIBAS, as the Syndication Agent, and
JPMORGAN CHASE BANK, N.A., THE ROYAL BANK OF SCOTLAND plc and FORTIS CAPITAL CORP., as
Co-Documentation Agents.

WITNESSETH:

     WHEREAS, concurrently with the closing and consummation of the Closing Transactions (as
hereinafter defined), the Borrower has requested that the Lenders provide the Borrower with the
credit facilities described and provided herein, and the Lenders are willing to provide such
facilities on the terms and subject to the conditions hereinafter set forth; and

     WHEREAS, the Lenders have appointed Bank of America, N.A. as Administrative Agent hereunder,
BNP Paribas as Syndication Agent hereunder, and JPMorgan Chase Bank, N.A., The Royal Bank of
Scotland plc and Fortis Capital Corp., as Co-Documentation Agents hereunder; and

     WHEREAS, Banc of America Securities LLC and BNP Paribas Securities Corp. have been appointed
Co-Lead Arrangers and Joint Bookrunners for the credit facilities provided herein.

     NOW, THEREFORE, in consideration of the premises, representations, warranties, covenants and
agreements contained herein, and other good and valuable consideration, the receipt and adequacy of
which are hereby acknowledged, the parties hereto hereby agree as follows:

ARTICLE I

DEFINITIONS

          Section 1.01 Defined Terms. As used in this Agreement, the following terms have the
meanings specified below:

          “ABR,” when used in reference to any Loan or Borrowing, means that such Loan, or the
Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the
Alternate Base Rate.

          “Acquisition” means the direct or indirect purchase or acquisition, whether in one or
more related transactions, of (a) any Person or group of Persons, or (b) any assets or securities
of any Person or group of Persons; provided, however, that notwithstanding the
foregoing, the term “Acquisition” shall be deemed not to include purchases and acquisitions (other
than, for clarity, Material Acquisitions) by a Person of Property in the ordinary course of
business.

          “Acquisition Period” means a period elected by the Borrower, such election to be
exercised by the Borrower delivering written notice thereof to the Administrative Agent (who shall
thereafter promptly notify the Lenders), commencing with the funding date of the purchase

1

 

price for
any Material Acquisition and ending on the earlier of (a) the date ending 270 days after such
funding date or (b) the Borrower’s election (provided that the Borrower is in compliance with all
applicable provisions of Section 7.14 after giving effect to such election) to terminate
such Acquisition Period, such election to be exercised by the Borrower delivering notice thereof to
the Administrative Agent (who shall thereafter promptly notify the Lenders); provided,
that, (i) once any Acquisition Period is in effect, the next Acquisition Period may not
commence until the termination of such Acquisition Period in effect, and (ii) after giving effect
to the termination of such Acquisition Period in effect, the Borrower shall be in compliance with
the applicable provisions of Section 7.14 and no Default shall have occurred and be
continuing.

          “Additional Lender” has the meaning given such term in Section 2.08(d)(i).

          “Additional Lender Certificate” has the meaning given such term in Section
2.08(d)(ii)(F).

          “Adjusted Eurodollar Rate” mean, with respect to any Eurodollar Borrowing for any
Interest Period, an interest rate per annum (rounded upwards, if necessary, to the next 1/100 of
1%) equal to (a) the Eurodollar Rate for such Interest Period multiplied by (b) the Statutory
Reserve Rate.

          “Administrative Agent” means Bank of America, N.A., in its capacity as administrative
agent for the Lenders hereunder, and its successors in such capacity.

          “Administrative Questionnaire” means an Administrative Questionnaire to be delivered
by each Lender to the Administrative Agent, in a form supplied by the Administrative Agent.

          “Affiliate” of any Person means any Person directly or indirectly controlled by,
controlling or under common control with such first Person. For purposes of this definition, any
Person which owns directly or indirectly 10% or more of the securities having ordinary voting power
for the election of directors or other governing body of a corporation or 10% or more of the
partnership or other ownership interests of any other Person (other than as a limited partner of
such other Person) will be deemed to “control” (including, with its correlative meanings,
“controlled by” and “under common control with”) such corporation or other Person.

          “Agents” means each of the Administrative Agent, the Syndication Agent and the
Co-Documentation Agents.

          “Aggregate Credit Exposure” means the sum of all of the Lenders’ Credit Exposures.

          “Agreement” means this Credit Agreement, as the same may be amended, supplemented,
restated or otherwise modified and in effect from time to time.

          “Alternate Base Rate” means, for any day, a rate per annum equal to the greater of (a)
the Prime Rate in effect on such day and (b) the Federal Funds Effective Rate in effect on such day
plus 1/2 of 1%. Any change in the Alternate Base Rate due to a change in the Prime

2

 

Rate or the
Federal Funds Effective Rate shall be effective from and including the effective date of such
change in the Prime Rate or the Federal Funds Effective Rate, respectively.

          “Applicable Lending Office” means, for each Lender and for each Type of Loan, such
office of such Lender (or an Affiliate of such Lender) as such Lender may from time to time specify
in writing to the Administrative Agent and the Borrower as the office by which its Loans of such
Type are to be made and/or issued and maintained.

          “Applicable Percentage” means, with respect to any Lender, the percentage of the Total
Commitment constituted by its Commitment (or, if the Commitments have terminated or expired, the
percentage which such Lender’s Credit Exposure at such time constitutes of the Aggregate Credit
Exposure at such time).

          “Applicable Rate” means, for any day, with respect to any ABR Loan, any Eurodollar
Loan or any Specified Rate Swingline Loan, or with respect to the commitment fees payable
hereunder, as the case may be, the applicable rate per annum set forth in the appropriate
intersection in the table below, based on the Consolidated Leverage Ratio as of the most recent
Quarterly Date with respect to which the Administrative Agent shall have received the Current
Information required to be delivered to the Administrative Agent pursuant to Section
6.01(a) or Section 6.01(b) and the calculation certificate required to be delivered
pursuant to Section 6.01(c) in respect of such Current Information:

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	 	 	Specified Rate	 	Commitment
	 	 	ABR Loan	 	Eurodollar	 	Swingline Loan	 	Fee
	Consolidated Leverage Ratio	 	Percentage	 	Loan Percentage	 	Percentage	 	Percentage
	Category 1

Greater than 5.00 to 1.00

	 	 	1.250	%	 	 	2.500	%	 	 	2.500	%	 	 	0.500	%
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	Category 2

Greater than 4.50 to 1.00
but less than or equal to 5.00 to 1.00

	 	 	1.000	%	 	 	2.250	%	 	 	2.250	%	 	 	0.500	%
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	Category 3

Greater than 4.00 to 1.00
but less than or equal to 4.50 to 1.00

	 	 	0.750	%	 	 	2.000	%	 	 	2.000	%	 	 	0.375	%
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	Category 4

Greater than 3.50 to 1.00
but less than or equal to 4.00 to 1.00

	 	 	0.500	%	 	 	1.750	%	 	 	1.750	%	 	 	0.375	%
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	Category 5

Greater than 3.00 to 1.00
but less than or equal to 3.50 to 1.00

	 	 	0.250	%	 	 	1.500	%	 	 	1.500	%	 	 	0.300	%
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	Category 6

Less than or equal to 3.00 to 1.00

	 	 	0.000	%	 	 	1.250	%	 	 	1.250	%	 	 	0.250	%

Each change in the Applicable Rate based on a change in the Current Information shall become
effective on the date on which the Current Information is delivered to the Lenders pursuant to
Section 6.01 (but in any event not later than the 60th day after the end of each
of the first three Fiscal Quarters of each Fiscal Year or the 120th day after the end of
each Fiscal Year, as the case may be) and shall remain in effect until the next change to be
effected pursuant to this paragraph.

3

 

If any Current Information is not delivered within the time
periods specified in Section 6.01, then, commencing on the day following the applicable due
date for such Current Information as specified in Section 6.01 until such Current
Information is delivered, the Consolidated Leverage Ratio as at the end of the Fiscal Quarter that
would have been covered thereby shall for the purposes of this definition be deemed to be in
Category 1 (Greater than 5.00 to 1.00). Furthermore, and notwithstanding any other provision to
the contrary, for the period from the Effective Date until the date on which the Current
Information for the Fiscal Quarter ending September 30, 2007 is delivered to the Lenders, the
Consolidated Leverage Ratio as at the end of each Fiscal Quarter during such period shall, for the
purposes of this definition, be deemed to be in Category 1 (Greater than 5.00 to 1.00).

     “Approved Fund” means any Fund that is administered or managed by (a) a Lender, (b) an
Affiliate of a Lender, or (c) an entity or an Affiliate of an entity that administers or manages a
Lender.

     “Arrangers” means BAS and BNPPSC, in their capacity as co-lead arrangers and joint
bookrunners.

     “Asset Disposition” means the sale, assignment, lease, license, transfer, exchange,
conveyance or other disposition by any Credit Party of any of its right, title and interest in any
Mortgaged Property, including pursuant to any casualty or condemnation proceeding affecting such
Mortgaged Property, but excluding any of the foregoing expressly permitted by Section
7.10(a), (b), (c), (d), (f), (g), (h) and
(i). The term “Asset Disposition” shall include, without limitation, any Material Asset
Disposition.

     “Assignee Group” means two or more Eligible Assignees that are Affiliates of one
another or two or more Approved Funds managed by the same investment advisor.

     “Assignment and Acceptance” means an assignment and acceptance entered into by a
Lender and an Eligible Assignee (with the consent of any party whose consent is required by
Section 10.04), and accepted by the Administrative Agent, in the form of Exhibit A
or any other form approved by the Administrative Agent.

     “Available Cash” has the meaning given such term in the Limited Partnership Agreement.

     “Availability Period” means the period from and including the Effective Date to but
excluding the earlier of the Maturity Date or the date of termination of the Commitments.

     “Bank of America” means Bank of America, N.A., a national banking association, in its
individual capacity and not as the Administrative Agent.

     “BAS” means Banc of America Securities LLC, and its successors.

     “BNP Fee Letter” has the meaning given such term in the definition of “Fee Letter” in
this Section 1.01.

     “BNPPSC” means BNP Paribas Securities Corp., and its successors.

4

 

     “Board” means the Board of Governors of the Federal Reserve System of the United
States of America.

     “BofA Fee Letter” has the meaning given such term in the definition of “Fee Letter” in
this Section 1.01.

     “Borrower” has the meaning given such term in the initial paragraph hereof.

     “Borrowing” means (a) Revolving Loans of the same Type, made, converted or continued
on the same date and, in the case of Eurodollar Loans, as to which a single Interest Period is in
effect, and (b) Swingline Loans.

     “Borrowing Request” means a request by the Borrower for (a) a Revolving Borrowing
pursuant to Section 2.03 and substantially in the form of Exhibit B-1 or any other
form approved by the Administrative Agent, or (b) a Swingline Borrowing pursuant to Section
2.05 and substantially in the form of Exhibit B-3 or any other form approved by the
Administrative Agent.

     “Business Day” means any day that is not a Saturday, Sunday or other day on which
commercial banks in Dallas, Texas are authorized or required by law to remain closed;
provided that, when used in connection with a Eurodollar Loan, the term “Business
Day” shall also exclude any day on which banks are not open for dealings in dollar deposits in the
London interbank market.

     “Capital Expenditures” means, for any period, all expenditures (whether paid in cash
or accrued as a liability, including the portion of Capital Lease Obligations originally incurred
during such period that are capitalized on the consolidated balance sheet of the Borrower) by the
Borrower and its Consolidated Subsidiaries during such period that, in conformity with GAAP, are
included in “capital expenditures,” “additions to property, plant or equipment” or comparable items
in the consolidated financial statements of the Borrower, but excluding expenditures for the
restoration, repair or replacement of any fixed or capital asset that was destroyed or damaged, in
whole or in part, in an amount equal to any insurance proceeds received in connection with such
damage or destruction.

     “Capital Lease Obligations” of any Person means the obligations of such Person to pay
rent or other amounts under any lease of (or other arrangement conveying the right to use) Property
to the extent such obligations are required to be classified and accounted for as a capital lease
on a balance sheet of such Person under GAAP, and, for purposes of this Agreement, the amount of
such obligations shall be the capitalized amount thereof determined in accordance with GAAP.

     “Cash Collateralize” has the meaning given such term in Section 2.06(g).
“Cash Collateral,” “Cash Collateralized” and “Cash Collateralization” have
meanings correlative thereto.

     “Casualty Event” means any loss, casualty or other insured damage to, or any taking
under power of eminent domain or by condemnation or similar proceeding of, any Collateral.

5

 

     “CERCLA” means the Comprehensive Environmental Response, Compensation and Liability
Act of 1980, 42 U.S. C. §9601, et. seq., as amended from time to time.

     “Change in Control” means (a) the General Partner is no longer the sole general
partner of the Borrower, (b) Parent no longer owns, directly or indirectly, at least 51% of the
aggregate ordinary voting power represented by the outstanding Equity Interests of the General
Partner and a majority of the Board of Directors of the General Partner thereafter ceases to be
comprised of Incumbent Directors, (c) except as permitted by Section 7.03(a) and
Section 7.10, the Borrower is no longer the sole owner of all of the Equity Interests of
Operating, (d) except as permitted by Section 7.03(a) and Section 7.10, the
Borrower shall cease to own, directly or indirectly, 100% of the outstanding Equity Interests of
each Material Subsidiary, (e) a “Change of Control” as defined in the Parent Credit Agreement shall
have occurred, (f) any amendment, supplement or restatement of the Limited Partnership Agreement
shall be made that results in the General Partner ceasing to have the authority to make any
decision that is within its authority under the terms of the Limited Partnership Agreement as in
effect on the Closing Date after giving effect to the Closing Transactions or (g) any amendment,
supplement or restatement of the GP LLC Agreement shall be made that results in Quicksilver Gas
Services Holdings LLC, a Delaware limited liability company, ceasing to have the right to appoint a
majority of the members of the Board of Directors of the General Partner.

     “Change in Law” means (a) the adoption of any law, rule or regulation after the date
of this Agreement, (b) any change in any law, rule or regulation or in the interpretation or
application thereof by any Governmental Authority after the date of this Agreement or (c)
compliance by any Lender or L/C Issuer (or, for purposes of Section 2.15(b) by any lending
office of such Lender or L/C Issuer or by such Lender’s or L/C Issuer’s holding company, if any)
with any request, guideline or directive (whether or not having the force of law) of any
Governmental Authority made or issued after the date of this Agreement.

     “Class,” when used in reference to any Loan or Borrowing, refers to whether such Loan,
or the Loans comprising such Borrowing, are Revolving Loans or Swingline Loans.

     “Closing Date” means the date of this Agreement.

     “Closing Distributions” means, collectively, the Private Investor Distribution and the
Parent Distribution.

     “Closing Transaction Documents” means the Contribution Agreement, the Limited
Partnership Agreement, the Gathering and Processing Agreement, the Parent Subordinated Note, the
Secondment Agreement and the Omnibus Agreement.

     “Closing Transactions” means the transactions to occur on the Closing Date, including,
without limitation: (a) the contribution of the limited partnership interests of the Cowtown
Entities pursuant to and in accordance with the terms of the Contribution Agreement, (b)
consummation of the IPO and the receipt by the Borrower of not less than $62,000,000, net of
underwriting discounts and fees, and the application of such proceeds to finance in part the
Closing Distributions, together with costs and expenses related to the Closing Transactions, (c)
the payment by the Borrower to Parent of the Parent Distribution with the net cash proceeds of

6

 

the
IPO and the initial Borrowing hereunder, (d) the payment by the Borrower to certain private
investors of the Private Investor Distribution with the net cash proceeds of the IPO and the
initial Borrowing hereunder, and (e) the payment of (i) all fees and expenses of the Administrative
Agent in connection with the credit facilities provided herein that are required to be paid on the
Closing Date, and (ii) all fees of the Agents and Arrangers as set forth in, and in accordance
with, the Fee Letters that are required to be paid on the Closing Date.

     “Code” means the Internal Revenue Code of 1986, as amended from time to time.

     “Co-Documentation Agents” means JPMorgan Chase Bank, N.A., The Royal Bank of Scotland
plc and Fortis Capital Corp., in their capacity as co-documentation agents hereunder, and their
respective successors in such capacity.

     “Collateral” means, collectively, all Mortgaged Property and all other “Collateral” or
similar terms as defined, as the case may be, in the Guaranty and Collateral Agreement, the
Mortgages or any other Security Instrument.

     “Commitment” means, with respect to each Lender, the commitment of such Lender to make
Revolving Loans and to acquire participations in Letters of Credit and Swingline Loans hereunder,
and the commitment of the Swingline Lender to make Swingline Loans, as such commitment may be (a)
reduced from time to time pursuant to Section 2.08 or Section 2.10, (b) increased
from time to time pursuant to Section 2.08, and (c) reduced or increased from time to time
pursuant to assignments by or to such Lender pursuant to Section 10.04. The initial amount
of each Lender’s Commitment is set forth on Schedule 2.01, or in the Assignment and
Acceptance pursuant to which such Lender shall have assumed its Commitment, as applicable. The
initial Total Commitment is $150,000,000.

     “Commitment Increase Certificate” has the meaning given such term in Section
2.08(d)(ii)(E).

     “Commodity Swap Agreement” means any financial derivative transaction that is a
commodity or basis swap, cap, floor, collar, forward agreement or other protection agreement or
option with respect to any such transaction, designed to address the risk of fluctuations in
commodity prices.

     “Common Units” means the common units and subordinated units representing limited
partner interests in the Borrower.

     “Consolidated EBITDA” means, for any period, Consolidated Net Income for such period
plus, without duplication and to the extent deducted in determining Consolidated Net Income
for such period, the sum of (a) any provision for (or less any benefit from) income, sales or
franchise Taxes included in determining Consolidated Net Income; (b) Consolidated Net Interest
Expense deducted in determining Consolidated Net Income; (c) depreciation, depletion and
amortization expense deducted in determining Consolidated Net Income; (d) any unusual or
non-recurring non-cash expenses or losses (including, whether or not otherwise includable as a
separate item in the statement of such Consolidated Net Income for such period, non-cash losses on
sales of assets outside of the ordinary course of business); and (e) other non-cash charges
deducted in determining Consolidated Net Income to the extent not already included in clauses

7

 

(b), (c) and (d) of this definition; provided, that, if the
Borrower or any Consolidated Subsidiary shall make any Material Acquisition during the period of
four Fiscal Quarters ending on the last day of the Fiscal Quarter immediately preceding the date of
determination for which Current Information is available, then Consolidated EBITDA may be
calculated, at the Borrower’s election (by written notice to the Administrative Agent) and, if so
elected, in a manner satisfactory to the Administrative Agent in its reasonable discretion, after
giving pro forma effect to such Material Acquisition (including the revenues of the properties
acquired) as if such Material Acquisition had occurred on the first day of such period.

     “Consolidated Interest Coverage Ratio” means, as of the end of any Fiscal Quarter, the
ratio of (a) Consolidated EBITDA for the Rolling Period then ended to (b) Consolidated Net Interest
Expense for the Rolling Period then ended; provided, that, notwithstanding the
foregoing, for purposes of this definition (i) with respect to the Fiscal Quarter ending June 30,
2007, Consolidated EBITDA shall be measured by multiplying actual Consolidated EBITDA for the
three-month period then ended by four, and Consolidated Net Interest Expense shall be measured by
multiplying actual Consolidated Net Interest Expense for the three-month period then ended by four,
(ii) with respect to the Fiscal Quarter ending September 30, 2007, Consolidated EBITDA shall be
measured by multiplying actual Consolidated EBITDA for the six-month period then ended by two, and
Consolidated Net Interest Expense shall be measured by multiplying actual Consolidated Net Interest
Expense for the six-month period then ended by two, and (iii) with respect to the Fiscal Quarter
ending December 31, 2007, Consolidated EBITDA shall be measured by multiplying actual Consolidated
EBITDA for the nine-month period then ended by 1.333, and Consolidated Net Interest Expense shall
be measured by multiplying actual Consolidated Net Interest Expense for the nine-month period then
ended by 1.333.

     “Consolidated Leverage Ratio” means (a) for purposes of calculating the Applicable
Rate (but subject in all respects to the terms contained in the definition of “Applicable Rate”
with respect to the delivery (or non-delivery) of Current Information) for any day, the ratio of
(i) Consolidated Total Funded Debt as of the last day of the Rolling Period ending on the most
recent Quarterly Date with respect to which the Administrative Agent shall have received the
Current Information to (ii) Consolidated EBITDA for such Rolling Period, (b) for purposes of
determining satisfaction of the closing condition set forth in Section 4.01(p), the ratio
of (i) Consolidated Total Funded Debt as of the Closing Date to (ii) actual Consolidated EBITDA
calculated with respect to the Cowtown Entities only for the three month period ended March 31,
2007, multiplied by four, and (c) for purposes of calculating the covenant set forth in Section
7.14, the ratio of (i) Consolidated Total Funded Debt as of the last day of the Rolling Period
then ended to (ii) Consolidated EBITDA for the Rolling Period then ended; provided,
that, notwithstanding the foregoing, for purposes of this definition (A) with respect to
the Fiscal Quarter ending June 30, 2007, Consolidated EBITDA shall be measured by multiplying
actual Consolidated EBITDA for the six-month period then ended by two, and (B) with respect to the
Fiscal Quarter ending September 30, 2007, Consolidated EBITDA shall be measured by multiplying
actual Consolidated EBITDA for the nine-month period then ended by 1.333.

     “Consolidated Net Income” means, with respect to the Borrower and its Consolidated
Subsidiaries on a consolidated basis, for each period of determination, the net income (or loss) of
the Borrower and its Consolidated Subsidiaries for such period, determined

8

 

on a consolidated basis
in accordance with GAAP, but excluding: (a) the income of any other Person (other than its
Consolidated Subsidiaries) in which such Person or any of its subsidiaries has an ownership
interest, unless received by such Person or its Consolidated Subsidiaries in a cash distribution;
(b) any after-tax gains attributable to asset dispositions; (c) any non-cash gains, losses or
charges on any Hedging Agreement resulting from the requirements of SFAS 133 for that period; (d)
any non-cash gains, losses or charges resulting from the requirements of SFAS 143 or SFAS 144 for
that period; and (e) to the extent not included in clauses (a), (b), (c)
and (d) above, any after-tax (i) extraordinary gains (net of extraordinary losses) or (ii)
non-cash nonrecurring gains.

     “Consolidated Net Interest Expense” means, with respect to the Borrower and its
Consolidated Subsidiaries on a consolidated basis, for each period of determination, (a) an amount
equal to interest expense determined on a consolidated basis in accordance with GAAP, less (i) any
interest paid by capitalizing the accrued and unpaid interest on the Parent Subordinated Note and
adding it to the principal thereof in accordance with the terms of the Parent Subordinated Note,
and (ii) non-cash interest expense accrued in accordance with GAAP on the principal of the Purchase
Debt, minus (b) interest income determined on a consolidated basis in accordance with GAAP.

     “Consolidated Subsidiaries” means each subsidiary of a Person (whether now existing or
hereafter created or acquired) the financial statements of which shall be (or should have been)
consolidated with the financial statements of such Person in accordance with GAAP. Unless
otherwise indicated, each reference to the term “Consolidated Subsidiary” means a subsidiary
consolidated with the Borrower.

     “Consolidated Total Funded Debt” means all Funded Indebtedness of the Borrower and its
Consolidated Subsidiaries, determined on a consolidated basis.

     “Contribution Agreement” means that certain Contribution, Conveyance and Assumption
Agreement dated as of August 10, 2007, among the General Partner, the Borrower, Operating and
certain other Persons party thereto, as the same may be amended, supplemented, restated or
otherwise modified from time to time to the extent permitted hereunder.

     “Cowtown Entities” means each of Cowtown Gas and Cowtown Pipeline.

     “Cowtown Gas” means Cowtown Gas Processing Partners L.P., a Texas limited partnership.

     “Cowtown Pipeline” means Cowtown Pipeline Partners L.P., a Texas limited partnership.

     “Credit Exposure” means, with respect to any Lender at any time, without duplication,
the sum of (a) the outstanding principal amount of such Lender’s Revolving Loans plus (b)
its Applicable Percentage of the total L/C Obligations at such time, plus (c) its Swingline
Exposure at such time.

9

 

     “Credit Parties” means the Borrower and each of its Material Subsidiaries that
executes a Loan Document collectively, and “Credit Party” means any such Person
individually.

     “Current Information” means the most recent financial statements and other information
required to be delivered to the Administrative Agent pursuant to Section 6.01(a) or
Section 6.01(b) and the calculation certificate required to be delivered pursuant to
Section 6.01(c) in respect of such financial statements.

     “Debt Offering” means the incurrence (but without waiving the requirement of the
Required Lenders’ consent to any such incurrence in violation of any Loan Document) by any Credit
Party of secured Indebtedness for borrowed money other than Indebtedness permitted by Section
7.01 hereof.

     “Default” means any event or condition which constitutes an Event of Default or which
upon notice, lapse of time or both would, unless cured or waived, become an Event of Default.

     “Defensible Title” means, with respect to any Property of any Credit Party, ownership
by such Credit Party of such Property, or valid leasehold interests therein, as applicable,
defensible against the claims and demands of all Persons claiming the same, save and except (a)
Permitted Encumbrances and other Liens permitted by the Loan Documents, (b) easements or rights of
way included in such Property as to which such Credit Party has a partial interest or which may be
held jointly with third parties, (c) other defects in
title that do not materially interfere with such Credit Party’s ability to conduct its
business as currently conducted or to utilize such Property for its intended purpose, and (d) other
Liens approved in writing by the Administrative Agent.

     “Disclosed Matters” means the actions, suits and proceedings and the environmental
matters disclosed in Schedule 3.06, or in a replacement Schedule that is delivered to the
Administrative Agent and approved by the Required Lenders in their sole discretion.

     “Distribution” by any Person, means (a) with respect to any stock issued by such
Person or any partnership, joint venture, limited liability company, membership or other Equity
Interest of such Person, the retirement, redemption, purchase, or other acquisition for value of
any such stock or partnership, joint venture, limited liability company, membership or other Equity
Interest, (b) the declaration or payment of any dividend or other distribution on or with respect
to any stock, partnership, joint venture, limited liability company, membership or other Equity
Interest of any Person, and (c) any other payment by such Person with respect to such stock,
partnership, joint venture, limited liability company, membership or other Equity Interest of such
Person.

     “dollars” or “$” refers to lawful money of the United States of America.

     “Effective Date” means the date on which the conditions specified in Section
4.01 are satisfied (or waived in accordance with Section 10.02).

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     “Eligible Assignee” means (a) a Lender; (b) an Affiliate of a Lender; (c) an Approved
Fund; and (d) any other Person (other than a natural person) approved by (i) the Administrative
Agent and L/C Issuer, and (ii) unless an Event of Default has occurred and is continuing, the
Borrower (each such approval not to be unreasonably withheld, conditioned or delayed);
provided that notwithstanding the foregoing, “Eligible Assignee” shall not include
the Borrower or any of the Borrower’s Affiliates or Subsidiaries.

     “Environmental Laws” means any and all applicable Governmental Rules pertaining to
health (with respect to exposure to Hazardous Materials) or the environment in effect in any and
all jurisdictions in which the Borrower or any other Credit Party is conducting or at any time has
conducted business, or where any Property of the Borrower or any other Credit Party is located,
including, without limitation, the Clean Air Act, as amended, CERCLA, the Federal Water Pollution
Control Act, as amended, the Occupational Safety and Health Act of 1970, as amended, the Resource
Conservation and Recovery Act of 1976 (“RCRA”), as amended, the Safe Drinking Water Act, as
amended, the Toxic Substances Control Act, as amended, the Superfund Amendments and Reauthorization
Act of 1986, as amended, the Hazardous Materials Transportation Act, as amended, and other
environmental conservation or protection laws. The term “release” (or “threatened release”) shall
have the meaning specified in CERCLA, and the term “disposal” (or “disposed”) shall have the
meaning specified in RCRA; provided, however, that (a) in the event either CERCLA
or RCRA is amended so as to broaden the meaning of any term defined thereby, such broader meaning
shall apply subsequent to the
effective date of such amendment and (b) to the extent the laws of the state or province in
which any Property of the Borrower or any Subsidiary is located establish a meaning for “release”
or “disposal” which is broader than that specified in either CERCLA or RCRA, such broader meaning
shall apply.

     “Environmental Liability” means any liability, contingent or otherwise (including any
liability for damages, costs of environmental remediation, fines, penalties or indemnities), of the
Borrower or any of the other Credit Parties resulting from or based upon (a) violation of any
Environmental Law, (b) the generation, use, handling, transportation, storage, treatment or
disposal of any Hazardous Materials, (c) exposure to any Hazardous Materials, (d) the release or
threatened release of any Hazardous Materials into the environment or (e) any contract or agreement
pursuant to which liability is assumed or imposed with respect to any of the foregoing.

     “Equity Interests” means, with respect to any Person, shares of the capital stock,
partnership interests, membership interests in a limited liability company, beneficial interests in
a trust or other equity interest in such Person or any warrants, options or other rights to acquire
any of the foregoing.

     “ERISA” means the Employee Retirement Income Security Act of 1974, as amended from
time to time, and any successor statute of similar import, together with the rules, regulations and
interpretations thereunder, in each case as in effect from time to time.

     “ERISA Affiliate” means each member of a controlled group of corporations or each
member of a controlled group of trades or businesses (whether or not incorporated) under

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common
control which, together with the Borrower, is treated as a single employer under Section 414(b) or
414(c) of the Code or Section 4001(b)(1) of ERISA.

     “Eurodollar,” when used in reference to any Revolving Loan or Revolving Borrowing,
means that such Revolving Loan, or the Revolving Loans comprising such Revolving Borrowing, are
bearing interest at a rate determined by reference to the Adjusted Eurodollar Rate.

     “Eurodollar Rate” applicable to any Interest Period means a rate per annum equal to
the British Bankers’ Association LIBOR Rate (“BBA LIBOR”), as published by Reuters (or
other commercially available, generally recognized financial information source providing
quotations of BBA LIBOR as designated by the Administrative Agent from time to time) at
approximately 11:00 a.m., London time, two Business Days prior to the commencement of such Interest
Period, for dollar deposits (for delivery on the first day of such Interest Period) with a term
equivalent to such Interest Period. If such rate is not available at such time for any reason,
then the “Eurodollar Rate” for such Interest Period shall be the rate per annum determined by the
Administrative Agent to be the rate at which deposits in dollars for delivery on the first day of
such Interest Period in same day funds in the amount of the Eurodollar Loan being made, continued
or converted by Bank of America and with a term equivalent to such Interest Period would be offered
by Bank of America’s London Branch to major banks in the London interbank eurodollar market at
their request at
approximately 11:00 a.m. (London time) two Business Days prior to the commencement of such
Interest Period.

     “Event of Default” has the meaning assigned to such term in Section 8.01.

     “Exchange Act” means the Securities Exchange Act of 1934, as amended from time to
time.

     “Excluded Taxes” means, with respect to any Agent, any Lender, L/C Issuer or any other
recipient of any payment to be made by or on account of any obligation of the Borrower hereunder,
(a) income or franchise taxes imposed on (or measured by) its net income by the United States of
America, or by the jurisdiction under the laws of which such recipient is or was organized or in
which its principal office is or was located or, in the case of any Lender, in which its Applicable
Lending Office is or was located, (b) any branch profits taxes imposed by the United States of
America or any similar tax imposed by any other jurisdiction in which the recipient is or was
located and (c) in the case of a Foreign Lender (other than an assignee pursuant to a request by
the Borrower under Section 2.19(b)), any withholding tax that is imposed on amounts payable
to such Foreign Lender at the time such Foreign Lender becomes a party to this Agreement (or
designates a new lending office) or is attributable to such Foreign Lender’s failure or inability
to comply with Section 2.17(e) except to the extent that such Foreign Lender (or its
assignor, if any) was entitled, at the time of designation of a new lending office (or assignment),
to receive additional amounts from the Borrower with respect to such withholding tax pursuant to
Section 2.17(a).

     “Federal Funds Effective Rate” means, for any day, an interest rate per annum equal to
the weighted average (rounded upwards, if necessary, to the next 1/100th of 1%) of the
rates on overnight Federal funds transactions with members of the Federal Reserve System

12

 

arranged
by Federal funds brokers on such day, as published for such day (or if such day is not a Business
Day, for the immediately preceding Business Day) by the Federal Reserve Bank of New York, or, if
such rate is not so published for any day which is a Business Day, the average (rounded upwards, if
necessary, to the next 1/100th of 1%) of the quotations at approximately 10:00 a.m.
(Dallas, Texas time) on such day on such transactions received by the Administrative Agent from
three Federal funds brokers of recognized standing selected by the Administrative Agent in its sole
reasonable discretion.

     “Fee Letters” means, collectively, that certain (a) fee letter from Bank of America
and BAS to the Borrower dated as of April 13, 2007, concerning certain fees in connection with this
Agreement, as the same may be amended, supplemented or restated from time to time (the “BofA
Fee Letter”), and (b) fee letter from BNP Paribas and BNPPSC to the Borrower dated as of April
13, 2007, concerning certain fees in connection with this Agreement, as the same may be amended,
supplemented or restated from time to time (the “BNP Fee Letter”).

     “FERC” means the Federal Energy Regulatory Commission, and any successor agency
thereto.

     “Financing Transactions” means the execution, delivery and performance by each Credit
Party of the Loan Documents to which it is a party, the borrowing of the Loans, the use of the
proceeds thereof, and the issuance of Letters of Credit hereunder.

     “Fiscal Quarter” means a fiscal quarter of the Borrower ending on the last day of
March, June, September or December of each year.

     “Fiscal Year” means the fiscal year of the Borrower ending on December 31 of each
year.

     “Foreign Entity” means any Person (other than a natural person and a Foreign
Subsidiary) that is organized under the laws of a jurisdiction other than the United States of
America or any State thereof or the District of Columbia.

     “Foreign Lender” means any Lender that is organized under the laws of a jurisdiction
other than the United States of America or any State thereof or the District of Columbia.

     “Foreign Subsidiary” means any Subsidiary that is organized under the laws of a
jurisdiction other than the United States of America or any State thereof or the District of
Columbia.

     “Fund” means any Person (other than a natural person) that is (or will be) engaged in
making, purchasing, holding or otherwise investing in commercial bank loans and similar extensions
of credit in the ordinary course of its business.

     “Funded Indebtedness” means, as to any Person, without duplication, all Indebtedness
(other than (a) Indebtedness evidenced by the Parent Subordinated Note, and (b) the Purchase Debt)
of such Person for borrowed money (including, without limitation, the

13

 

Loans), all obligations of
such Person evidenced by bonds, debentures, notes or similar instruments, all Capital Lease
Obligations of such Person, obligations in respect of letters of credit of such Person, and all
guaranties by such Person of Funded Indebtedness of other Persons, in each case determined in
accordance with GAAP.

     “GAAP” means generally accepted accounting principles in the United States of America
as in effect from time to time.

     “Gathering and Processing Agreement” means that certain Fifth Amended and Restated
Cowtown Gas Facilities Gas Gathering and Processing Agreement dated as of August 10, 2007, among
Parent and the Cowtown Entities, as the same may be amended, supplemented, restated or otherwise
modified from time to time to the extent permitted hereunder.

     “General Partner” means Quicksilver Gas Services GP LLC, a Delaware limited liability
company.

     “Governmental Authority” means the government of the United States of America, any
other nation or any political subdivision thereof, whether state or local, and any agency,
authority, instrumentality, regulatory body, court, central bank or other entity exercising
executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or
pertaining to government.

     “Governmental Rule” means any statute, law, regulation, ordinance, rule, judgment,
order, decree, permit, concession, grant, franchise, license, agreement, directive or other
governmental restriction or binding form of decision of or determination by, or binding
interpretation or administration of any of the foregoing by, any Governmental Authority, whether
now or hereafter in effect.

     “GP LLC Agreement” means that certain First Amended and Restated Limited Liability
Company Agreement of the General Partner, dated as of July 24, 2007, as the same may be amended,
supplemented, restated or otherwise modified from time to time.

     “Guarantee” by any Person means any obligation, contingent or otherwise, of such
Person directly or indirectly guaranteeing any Indebtedness or other obligation of any other Person
and, without limiting the generality of the foregoing, any obligation, direct or indirect,
contingent or otherwise, of such Person (a) to purchase or pay (or advance or supply funds for the
purchase or payment of) such Indebtedness or other obligation (whether arising by virtue of
partnership arrangements, by agreement to keep-well, to purchase assets, goods, securities or
services, to take-or-pay, or to maintain financial statement conditions, by “comfort letter” or
other similar undertaking of support or otherwise) or (b) entered into for the purpose of assuring
in any other manner the obligee of such Indebtedness or other obligation of the payment thereof or
to protect such obligee against loss in respect thereof (in whole or in part), provided,
that the term “Guarantee” shall not include (x) endorsements of instruments for collection or
deposit in the ordinary course of business or (y) indemnities given in connection with asset sales
or otherwise provided in the ordinary course of business. The terms “Guarantee” and “Guaranteed”
used as a verb shall have a correlative meaning.

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     “Guaranty and Collateral Agreement” means a Guaranty and Collateral Agreement,
substantially in the form of Exhibit C-3 hereto, among the Credit Parties in favor of the
Administrative Agent, as amended, supplemented, restated or otherwise modified from time to time.

     “Hazardous Material” means all explosive or radioactive substances or wastes and all
hazardous or toxic substances, wastes or other pollutants, asbestos or asbestos containing
materials, polychlorinated biphenyls, radon gas, infectious or medical wastes and all other
substances or wastes of any nature regulated pursuant to any Environmental Law, and any petroleum,
petroleum products or petroleum distillates and associated oil or natural gas exploration,
production and development wastes that are not exempted or excluded from being defined as
“hazardous substances”, “hazardous materials”, “hazardous wastes” and “toxic substances” under such
Environmental Laws.

     “Hedging Agreement” means any Interest Rate Swap Agreement, Commodity Swap Agreement
or foreign currency exchange agreement.

     “Highest Lawful Rate” has the meaning given such term in Section 10.13(b).

     “Incumbent Directors” means the individuals who, as of the date of this Agreement, are
directors of the General Partner, and any individual becoming a director of the General Partner
subsequent to such date whose election, nomination for election by the General Partner’s members,
or appointment, was approved by a vote of a majority of the then Incumbent Directors (either by a
specific vote or by approval of the proxy statement of the General Partner in which such person is
named as a nominee for director, without objection to such nomination).

     “Indebtedness” means, for any Person, (without duplication): (a) all obligations of
such Person for borrowed money, (b) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (c) all other indebtedness (including Capital Lease
Obligations) of such Person on which interest charges are customarily paid or accrued, (d) all
Guarantees by such Person, (e) the unfunded or unreimbursed portion of all letters of credit,
banker’s acceptances, surety or other bonds or instruments issued for the account of such Person,
(f) any amount owed by such Person representing the deferred purchase price of property or services
(other than accounts payable incurred in the ordinary course of business and which have not been
outstanding for more than ninety (90) days past the applicable due date, or if outstanding beyond
such date, such account payable is being contested in good faith and such Person has established
appropriate reserves, if any, as required in conformity with GAAP), (g) all obligations of such
Person secured by a Lien on any property or asset owned or held by that Person regardless of
whether the indebtedness secured thereby shall have been assumed by that Person, (h) all
obligations under Operating Leases (i) which require such Person or its Affiliate to make payments
over the term of such lease, including payments at termination, based on the purchase price or
appraisal value of the Property subject to such lease plus a marginal interest rate, and (ii) that
are used primarily as a financing vehicle for such Property, (i) net liabilities of such Person
under all Hedging Agreements determined in accordance with GAAP, and (j) all liability of such
Person as a general partner of a partnership for obligations of such partnership of the nature
described in clauses (a) through (i) preceding. Without limiting the foregoing,
the Indebtedness of any Person shall include the Indebtedness of any other entity to the extent
such

15

 

Person is liable therefor as a result of such Person’s ownership interest in or other
relationship with such entity, except to the extent the terms of such Indebtedness expressly
provide that such Person is not liable therefor.

     “Indemnified Taxes” means Taxes other than Excluded Taxes and Other Taxes.

     “Interest Election Request” means a request by the Borrower to (a) convert or continue
a Revolving Borrowing in accordance with Section 2.07, which if written shall be in
substantially the form of Exhibit B-2 or any other form approved by the Administrative
Agent, or (b) convert a Swingline Borrowing in accordance with Section 2.05, which if
written shall be substantially in the form of Exhibit B-4 or any other form approved by the
Administrative Agent.

     “Interest Payment Date” means (a) with respect to any ABR Revolving Loan, each Payment
Date, (b) with respect to any Eurodollar Loan, the last day of the Interest Period applicable to
the Borrowing of which such Loan is a part and, in the case of a Eurodollar Borrowing with an
Interest Period of more than three months’ duration, each day prior to the last day of such
Interest Period that occurs at intervals of three months’ duration after the first day of such
Interest Period, and (c) with respect to any Swingline Loan, the day that such Swingline Loan is
required to be repaid pursuant to Section 2.09(b)(ii); provided, that, if a
Swingline Loan is converted to a Revolving Loan in accordance with Section 2.05 on a day
which is not an Interest Payment Date with respect to Revolving Loans as provided in clauses
(a) or (b) of this definition, then the Interest Payment Date for such converted
Swingline Loan shall, as of the effective date of such conversion to a Revolving Loan and
thereafter, be the Interest Payment Date for such Revolving Loan. The Maturity Date shall also be
an Interest Payment Date.

     “Interest Period” means with respect to any Eurodollar Borrowing, the period
commencing on the date of such Borrowing and ending on the numerically corresponding day, or, with
the consent of the Administrative Agent and if available to all Lenders, such other day, in the
calendar month that is one, two, three or six months or, if available to all Lenders, nine or
twelve months thereafter, as the Borrower may elect; provided, that (a) if any
Interest Period would end on a day other than a Business Day, such Interest Period shall be
extended to the next succeeding Business Day unless such next succeeding Business Day would fall in
the next calendar month, in which case such Interest Period shall end on the next preceding
Business Day, (b) any Interest Period pertaining to a Eurodollar Borrowing that commences on the
last Business Day of a calendar month (or on a day for which there is no numerically corresponding
day in the last calendar month of such Interest Period) shall end on the last Business Day of the
last calendar month of such Interest Period, and (c) no Interest Period may end later than the last
day of the Availability Period. For purposes hereof, the date of a Eurodollar Borrowing initially
shall be the date on which such Borrowing is made and thereafter shall be the effective date of the
most recent conversion or continuation of such Borrowing.

     “Interest Rate Swap Agreement” means any financial derivative transaction that is a
rate swap, rate cap, rate floor, rate collar, forward rate agreement or other rate protection
agreement or option with respect to any such transaction, designed to hedge against fluctuations in
interest rates.

16

 

     “Investment” means, with respect to any Person, any loan, advance, extension of credit
or capital contribution to, investment in or purchase of the stock or other securities of, or
interest in, any other Person.

     “IPO” means the initial offering and sale of Common Units to the public, as described
in the Registration Statement.

     “ISP” means, with respect to any Letter of Credit, the “International Standby
Practices 1998” published by the Institute of International Banking Law & Practice (or such later
version thereof as may be in effect at the time of issuance).

     “Issuer Documents” means, with respect to any Letter of Credit, the Letter of Credit
Application and any other document, agreement and instrument entered into by L/C Issuer and any
Credit Party or in favor of L/C Issuer and relating to any such Letter of Credit.

     “L/C Advance” means, with respect to each Lender, such Lender’s funding of its
participation in any L/C Borrowing in accordance with its Applicable Percentage.

     “L/C Borrowing” means an extension of credit resulting from a drawing under any Letter
of Credit which has not been reimbursed on the date when made or refinanced as a Borrowing.

     “L/C Credit Extension” means, with respect to any Letter of Credit, the issuance
thereof or extension of the expiry date thereof, or the increase of the amount thereof, or other
amendment or renewal thereof.

     “L/C Issuer” means Bank of America, in its capacity as issuer of Letters of Credit
hereunder, or any successor issuer of Letters of Credit hereunder.

     “L/C Obligations” means, at any date of determination, the aggregate amount available
to be drawn under all outstanding Letters of Credit plus the aggregate of all Unreimbursed
Amounts, including all L/C Borrowings. For purposes of computing the amount available to be drawn
under any Letter of Credit, the amount of such Letter of Credit shall be determined in accordance
with Section 1.05. For all purposes of this Agreement, if on any date of determination a
Letter of Credit has expired by its terms but any amount may still be drawn thereunder by reason of
the operation of Rule 3.14 of the ISP, such Letter of Credit shall be deemed to be “outstanding” in
the amount so remaining available to be drawn.

     “Lender Indebtedness” means any and all amounts now or hereafter owing by any Credit
Party to the Administrative Agent or the Lenders with respect to or in connection with the Loans,
the L/C Obligations, the Notes, this Agreement, any other Loan Document, any Issuer Document or any
Hedging Agreement between the Borrower or any of its Subsidiaries and any Lender or, as to any
Hedging Agreements, any and all amounts owing or to be owing thereunder by the Borrower or any of
its Subsidiaries to any Secured Affiliate.

     “Lenders” means the Persons listed in Schedule 2.01 and any other Person that
shall have become a party hereto pursuant to an Assignment and Acceptance (other than any such
Person that ceases to be a party hereto pursuant to an Assignment and Acceptance), and any

17

 

Person
that shall have become a party hereto as an Additional Lender pursuant to Section 2.08(d).
Unless the context otherwise requires, the term “Lenders” shall include the Swingline Lender.

     “Letter of Credit Application” means an application and agreement for the issuance or
amendment of a Letter of Credit in a form from time to time in use by L/C Issuer.

     “Letter of Credit Fee” has the meaning given such term in Section 2.06(i).

     “Letters of Credit” means, collectively, standby letters of credit issued hereunder.

     “Lien” means, with respect to any asset, (a) any mortgage, deed of trust, lien,
pledge, hypothecation, encumbrance, charge or security interest in, on or of such asset and (b) the
interest of a vendor or a lessor under any conditional sale agreement, capital lease or title
retention agreement (or any financing lease having substantially the same economic effect as any of
the foregoing) relating to such asset.

     “Limited Partnership Agreement” means that certain First Amended and Restated
Agreement of Limited Partnership of Quicksilver Gas Services LP, dated as of August 10, 2007, as
the same may be amended, supplemented, restated or otherwise modified from time to time to the
extent permitted hereunder.

     “Loan Documents” means this Agreement, the Notes, the Security Instruments, the
Borrowing Requests, the Interest Election Requests, the Issuer Documents, the Fee Letters, any
Commitment Increase Certificate and any Additional Lender Certificate, together with any other
document, instrument or agreement now or hereafter entered into in connection with the Loans, the
Letters of Credit, the Lender Indebtedness or the transactions contemplated by this Agreement, as
such documents, instruments or agreements may be amended, modified or supplemented from time to
time.

     “Loans” means the loans made by the Lenders to the Borrower pursuant to this
Agreement.

     “Major Asset” means any business unit of any Person, any pipeline system, any gas
gathering system or any gas gathering or processing plant.

     “Margin Stock” means “margin stock” within the meaning of Regulation U.

     “Material Acquisition” means an Acquisition of Major Assets with a fair market value
equal to or greater than $50,000,000.

     “Material Adverse Effect” means a material adverse effect on (a) the financial
condition, business operations, properties or assets of the Borrower and its Subsidiaries taken as
a whole, (b) (i) the validity and enforceability of this Agreement, the Notes, the Security
Instruments or any other material Loan Document, or (ii) the perfection or priority of any material
Lien purported to be created thereby, or (c) the right or ability of the Credit Parties to fully,
completely and timely pay and perform their obligations under the Loan Documents.

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     “Material Asset Disposition” means one or more Asset Dispositions pursuant to
Section 7.10(j) in respect of which (either before or after giving effect thereto) the
Credit Parties (or one or more of them) have received (a) in the aggregate during any Fiscal Year,
Net Cash Proceeds in an amount in excess of $7,500,000, or
(b) in the aggregate and on a cumulative basis during the term of this Agreement, Net Cash
Proceeds in an amount in excess of $20,000,000.

     “Material Contracts” means, collectively, the Gathering and Processing Agreement and
each other “material contract” (within the meaning of Item 601(b)(10) of Regulation S-K under the
Exchange Act) to which any Credit Party is a party, by which any Credit Party or its properties is
bound or to which any Credit Party is subject; provided, however, that,
notwithstanding that such contract may be a “material contract” within the meaning of Item
601(b)(10) of Regulation S-K, any management contract or any compensatory plan, contract or
arrangement, including but not limited to plans relating to Equity Interests, pension, retirement
or deferred compensation or bonus, incentive or profit sharing (or if not set forth in any formal
document, a written description thereof), in which any director or any executive officer of the
General Partner participates and any compensatory plan, contract or arrangement adopted without the
approval of the Equity Interest holders pursuant to which Equity Interests may be awarded (or if
not set forth in any formal document, a written description thereof), in which any director,
officer or employee of the General Partner or the Borrower or the Affiliates of either of them
participates, shall not be a “Material Contract” for purposes of this Agreement.

     “Material Indebtedness” means Indebtedness (other than the Lender Indebtedness), or
principal obligations in respect of one or more Hedging Agreements, of any one or more of the
Credit Parties in a principal amount exceeding $5,000,000. For purposes of determining Material
Indebtedness, the “principal obligations” of any Credit Party in respect of any Hedging Agreement
at any time shall be the aggregate amount (giving effect to any netting agreements) that such
Credit Party would be required to pay if such Hedging Agreement were terminated at such time.

     “Material Subsidiary” means (a) Operating, Operating GP and the Cowtown Entities, (b)
any Subsidiary of the Borrower listed on Schedule 3.12 as a “Material Subsidiary,” and (c)
any Subsidiary of the Borrower that (i) is designated by the Borrower in writing to the
Administrative Agent as a Material Subsidiary, (ii) owns Mortgaged Properties or other Collateral,
or (iii) is a direct or indirect parent of any Material Subsidiary.

     “Maturity Date” means August 10, 2012, as such date may be extended pursuant to
Section 2.08(e).

     “Midstream Activities” means, with respect to any Person, collectively, the treatment,
processing, gathering, dehydration, compression, blending, transportation, storage, transmission,
marketing, buying or selling or other disposition, whether for such Person’s own account or for the
account of others, of oil, natural gas, natural gas liquids or other liquid or gaseous
hydrocarbons, including that used for fuel or consumed in the foregoing activities, and all other
businesses permitted by Section 7.03(b); provided, that “Midstream
Activities” shall in no event include the drilling, completion or servicing of oil or gas wells,
including, without limitation, the ownership of drilling rigs.

19

 

     “Moody’s” means Moody’s Investors Service, Inc. and any successor thereto that is a
nationally recognized rating agency.

     “Mortgaged Property” means the Property owned by any Credit Party which is subject to
the Liens existing and to exist under the terms of the Mortgages.

     “Mortgages” means, individually and collectively, all mortgage and deed of trust
instruments creating, evidencing, perfecting or otherwise establishing the Liens required by the
terms of this Agreement as may have been heretofore or may hereafter be granted or assigned to the
Administrative Agent to secure the Lender Indebtedness or any part thereof, as amended,
supplemented, restated or otherwise modified from time to time. All Mortgages shall be in the form
of Exhibit C-2 or in such other form satisfactory to the Administrative Agent.

     “Multiemployer Plan” means a multiemployer plan as defined in Section 4001(a)(3) of
ERISA that is subject to Title IV of ERISA.

     “Net Cash Proceeds” means, with respect to any Asset Disposition (including, without
limitation, any Material Asset Disposition) or Debt Offering, the cash proceeds (including cash
equivalents and any cash payments received by way of deferred payment of principal pursuant to a
note or installment receivable or purchase price adjustment receivable or otherwise, but only as
and when received) of such Asset Disposition or Debt Offering received by the Borrower or any of
its Subsidiaries, net of (a) all attorneys’ fees, accountants’ fees, investment banking fees and
other customary expenses, fees and commissions actually incurred by the Borrower or any of its
Subsidiaries, (b) Taxes paid as of the date of receipt of such Net Cash Proceeds as a result of
such Asset Disposition or Debt Offering by the Borrower or any of its Subsidiaries, (c) amounts
required to be applied to the repayment of any Indebtedness secured by a Lien expressly permitted
hereunder on any Property that is the subject of such Asset Disposition (other than any Lien
pursuant to a Security Instrument), (d) cash payments made to satisfy obligations resulting from
early termination of Hedging Agreements, and (e) any portion of the purchase price from such Asset
Disposition held as a reserve or placed in escrow, whether as a reserve for adjustment of the
purchase price, for satisfaction of indemnities in respect of such Asset Disposition, or otherwise,
to the extent directly attributable to such Asset Disposition; provided, however,
that upon termination of such reserve or escrow, Net Cash Proceeds will be increased by the portion
of funds in such reserve or escrow that are released to the Borrower or any of its Subsidiaries.

     “Non-Consenting Lender” has the meaning given such term in Section 2.19(c).

     “Non-Recourse Indebtedness” means Indebtedness of any Subsidiary which does not own
Mortgaged Properties (a) secured solely by the assets acquired with the proceeds of such
Indebtedness and (b) with respect to which (i) no Credit Party shall have any liability to any
Person for repayment of all or any portion of such Indebtedness beyond the assets so secured and
(ii) the holders thereof (A) shall have recourse only to, and shall the right to require the
obligations of such Subsidiary to be performed, satisfied or paid only out of, the assets so
secured and (B) shall have no direct or indirect recourse
(including by way of indemnity or guaranty) to any Credit Party, whether for principal,
interest, fees, expenses or otherwise; provided, however, that any such
Indebtedness shall not cease to be “Non-Recourse

20

 

Indebtedness” solely as a result of the instrument
governing such Indebtedness containing terms pursuant to which such Indebtedness becomes recourse
upon (1) fraud or misrepresentation by the Person in connection with such Indebtedness, (2) such
Person failing to pay taxes or other charges that result in the creation of Liens on any portion of
the specific property securing such Indebtedness or failing to maintain any insurance on such
property required under the instruments securing such Indebtedness, (3) the conversion of any of
the collateral for such Indebtedness, (4) such Person failing to maintain any of the collateral for
such Indebtedness in the condition required under the instruments securing the Indebtedness, (5)
any income generated by the specific property securing such Indebtedness being applied in a manner
not otherwise allowed in the instruments securing such Indebtedness, (6) the violation of any
Environmental Law or otherwise affecting the environmental condition of the specific property
securing the Indebtedness or (7) the rights of the holder of such Indebtedness to the specific
property becoming impaired, suspended or reduced by any act, omission or misrepresentation of such
Person; provided further, however, that, upon the occurrence of any of the
foregoing clauses (1) through (7) above, any such Indebtedness shall cease to be
“Non-Recourse Indebtedness” and shall be deemed to be Indebtedness incurred by such Person at such
time.

     “Notes” means, collectively, the promissory notes of the Borrower provided for by
Section 2.09(a) payable to any Lender and being substantially in the form set forth on
Exhibit D, together with any renewals, extensions for any period, increases,
rearrangements, substitutions or modifications thereof.

     “Omnibus Agreement” means that certain Omnibus Agreement dated as of August 10, 2007,
among the General Partner, the Borrower, Operating and the Parent, as the same may be amended,
supplemented, restated or otherwise modified from time to time to the extent permitted hereunder.

     “Operating” means Quicksilver Gas Services Operating LLC, a Delaware limited liability
company.

     “Operating GP” means Quicksilver Gas Services Operating GP LLC, a Delaware limited
liability company.

     “Operating Lease” means any lease, sublease, license or similar arrangement (other
than a capital lease and other than leases with a primary term of one year or less or which can be
terminated by the lessee upon notice of one year or less without incurring a penalty) pursuant to
which a Person leases, subleases or is otherwise granted the right to occupy, take possession of,
or use property whether real, personal or mixed.

     “Other Taxes” means any and all present or future stamp or documentary taxes or any
other excise or property taxes, charges or similar levies arising from any payment made under any
Loan Document or from the execution, delivery or enforcement of, or otherwise with respect to, any
Loan Document, other than Excluded Taxes and Indemnified Taxes.

     “Parent” means Quicksilver Resources Inc., a Delaware corporation.

     “Parent Credit Agreement” means that certain Amended and Restated Credit Agreement,
dated as of February 9, 2007, among Parent, the financial institutions party thereto,

21

 

JPMorgan
Chase Bank, N.A., as global administrative agent for such financial institutions, and the other
agents party thereto,
as the same may be amended, modified, restated or supplemented from time to
time.

     “Parent Distribution” means the one-time cash distribution to be made by the Borrower
to Parent on the Closing Date in an amount not to exceed $120,000,000, such cash distribution to be
made with the proceeds of the IPO and the initial Borrowing hereunder.

     “Parent Subordinated Note” means that certain Subordinated Promissory Note, in the
form attached hereto as Exhibit G, dated as of the Closing Date, made by the Borrower
payable to the Parent in an initial aggregate principal amount not to exceed $50,000,000, as the
same may be amended, modified, restated or supplemented from time to time to the extent permitted
by the terms of such Subordinated Promissory Note and the terms hereof.

     “Payment Dates” means each Quarterly Date, commencing with the Quarterly Date
occurring on September 30, 2007. The Maturity Date shall also be a Payment Date.

     “PBGC” means the Pension Benefit Guaranty Corporation referred to and defined in ERISA
and any successor entity performing similar functions.

     “Permitted Encumbrances” means, with respect to any asset:

     (a) Liens securing the Lender Indebtedness;

     (b) Liens for taxes, assessments or other governmental charges or levies that are not
at the time delinquent or are being contested in compliance with Section 6.04;

     (c) inchoate statutory or operators’ Liens securing obligations for labor, services,
materials and supplies arising in the ordinary course of business that are not overdue or
are being contested in compliance with Section 6.04.

     (d) carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s, operators’,
landlords’, vendors’ and other like Liens, arising in the ordinary course of business and
securing obligations that are not overdue or are being contested in compliance with
Section 6.04;

     (e) pledges and deposits (i) made in the ordinary course of business in compliance with
workers’ compensation, unemployment insurance and other social
security laws or regulations and (ii) securing liabilities to insurance carriers under
insurance or self-insurance arrangements;

     (f) deposits to secure the performance of tenders, bids, trade contracts, leases,
statutory obligations, surety and appeal bonds, performance bonds and other obligations of a
like nature, in each case in the ordinary course of business;

     (g) irregularities in title, boundaries, or other survey defects, easements, leases,
restrictions, servitudes, licenses, permits, reservations, exceptions, zoning restrictions,
rights-of-way, conditions, covenants, mineral or royalty rights or reservations

22

 

or oil, gas
and mineral leases and rights of others in any property of the Credit Parties, including
rights of eminent domain (including those for streets, roads, bridges, pipes, pipelines,
natural gas gathering systems, processing facilities, railroads, electric transmission and
distribution lines, telegraph and telephone lines, the removal of oil, gas or other minerals
or other similar purposes, flood control, air rights, water rights, rights of others with
respect to navigable waters, sewage and drainage rights) that exist as of the Closing Date
or at the time the affected property is acquired, or are granted by any Credit Party in the
ordinary course of business and other similar charges or encumbrances which do not secure
the payment of Indebtedness and otherwise do not materially interfere with the occupation,
use and enjoyment by any Credit Party of any of the Mortgaged Property in the normal course
of business or materially impair the value thereof;

     (h) licenses granted in the ordinary course of business and leases of property of the
Credit Parties that are not material to the business and operations of the Credit Parties;

     (i) security interests arising by operation of law solely under Article 2 of the UCC to
the extent and so long as the “debtor” with respect to such security interests does not have
or does not lawfully obtain possession of the goods subject thereto;

     (j) Liens securing indebtedness neither created, assumed nor guaranteed by any Credit
Party upon lands over which easements or similar rights are currently owned or which are
acquired by any Credit Party in the ordinary course of business of such Credit Party so long
as such Liens do not materially interfere with the occupation, use and enjoyment by any
Credit Party of any of the Mortgaged Property in the normal course of business or materially
impair the value thereof;

     (k) any Lien or privilege vested in any lessor, licensor or permittor for rent to
become due or for other obligations or acts to be performed, the payment of which rent or
the performance of which other obligations or acts is required under leases, subleases,
licenses or permits;

     (l) any obligations or duties affecting any of the Mortgaged Property to any
municipality or public authority with respect to any franchise, grant, license or permit
which do not materially impair the use of such Mortgaged Property for the purpose for which
it is held;

     (m) any Lien on any Property of any Credit Party existing on the date hereof and set
forth in Schedule 7.02; provided, that, (i) such Lien shall not
apply to any other Property of any Credit Party other than the Property subject thereto on
the date hereof, additions or accessions thereto, and proceeds thereof, and (ii) such Lien
shall secure only those obligations which it secures on the date hereof and extensions,
renewals and replacements thereof that do not increase the outstanding principal amount
thereof;

     (n) any Lien existing on any Property prior to the acquisition thereof by any Credit
Party or existing on any Property of any Person that becomes a Subsidiary after the date
hereof prior to the time such Person becomes a Subsidiary; provided, that,
(i)

23

 

such Lien is not created in contemplation of or in connection with such acquisition or
such Person becoming a Subsidiary, as the case may be, (ii) such Lien shall not apply to any
Property of any Credit Party other than the Property subject thereto on the date of such
acquisition or the date such Person becomes a Subsidiary, as the case may be, additions or
accessions thereto, and proceeds thereof, and (iii) such Lien shall secure only those
obligations which it secures on such date and extensions, renewals and replacements thereof
that do not increase the outstanding principal amount thereof; and

     (o) Liens on fixed or capital assets acquired, constructed or improved by any Credit
Party; provided, that, (i) such security interests secure Indebtedness
permitted by Section 7.01(e), (ii) such security interests and the Indebtedness
secured thereby are incurred prior to or within 90 days after such acquisition or the
completion of such construction or improvement, (iii) the Indebtedness secured thereby does
not exceed 100% of the cost of acquiring, constructing or improving such fixed or capital
assets, and (iv) such security interests shall not apply to any other property or assets of
any Credit Party other than the acquired asset, additions or accessions thereto, and
proceeds thereof;

     (p) Liens securing Non-Recourse Indebtedness permitted by Section 7.01(f);

     (q) judgment Liens in respect of judgments that do not constitute an Event of Default
under Section 8.01(j);

     (r) any interest or title of a lessor under any lease or of a grantor under any
right-of-way, easement, license or permit entered into by any Credit Party in the ordinary
course of business and in accordance with the Loan Documents and covering only the assets so
leased or granted;

     (s) Liens perfected by the filing of UCC financing statements, financing statements or
other applicable filings regarding any Permitted Encumbrance;

     (t) Liens arising solely by virtue of any statutory or common law provision relating to
banker’s liens, rights of set-off or similar rights and remedies and burdening only deposit
accounts or other funds maintained with a creditor depository institution;

     (u) any Lien or encumbrance permitted by the Mortgages or the Guaranty and Collateral
Agreement;

     (v) contractual Liens that arise in the ordinary course of business under operating
agreements, joint venture agreements, oil and gas partnership agreements, oil and gas
leases, farm-out agreements, division orders, contracts for the sale, transportation or
exchange of oil and natural gas, unitization and pooling declarations and agreements, area
of mutual interest agreements, overriding royalty agreements, marketing agreements,
processing agreements, net profits agreements, development agreements, gas balancing or
deferred production agreements, injection, repressuring and recycling agreements, salt water
or other disposal agreements, seismic or other geophysical permits or agreements, and other
agreements which are usual and customary in the oil and gas business and are for claims
which are not delinquent or which are being contested in good faith by appropriate action
and for which adequate reserves have been maintained in accordance

24

 

with GAAP;
provided, that any such Lien referred to in this clause (v) does not
materially impair (i) the use of the Property covered by such Lien for the purposes for
which such Property is held by any Credit Party, or (ii) the value of such Property subject
thereto; or

     (w) Liens not otherwise included in this definition so long as neither (i) the
aggregate outstanding principal amount of the obligations of all of the Credit Parties
secured thereby nor (ii) the aggregate fair market value (determined as of the date such
Lien is incurred) of the assets subject thereto exceeds (as to the Borrower and all Credit
Parties) $5,000,000 at any one time.

     For the avoidance of doubt, to the extent any Lien could be attributable to more than one
subsection of this definition of “Permitted Encumbrances,” the Borrower or any other Credit Party
may categorize all or a portion of such Lien to any one or more subsections of this definition as
it elects and unless as otherwise expressly provided, in no event shall the same portion of any
Lien be deemed to utilize or be attributable to more than one subsection of this definition.

     “Permitted Investments” means:

     (a) readily marketable direct obligations of the United States of America (or
investments in mutual funds or similar funds which invest solely in such obligations);

     (b) fully insured time deposits and certificates of deposit with maturities of one year
or less of any commercial bank operating in the United States having capital and surplus in
excess of U.S.$100,000,000;

     (c) all Investments held by any Credit Party in the form of cash or cash equivalents;

     (d) all Investments by any Credit Party in Sweep Accounts;

     (e) commercial paper of a domestic issuer if at the time of purchase such paper is
rated in one of the two highest ratings categories of S&P or Moody’s;

     (f) money market mutual or similar funds having assets in excess of U.S.$100,000,000,
at least 95% of the assets of which are comprised of assets specified in clauses (a)
through (e) above;

     (g) all Investments described in the Current Information or on Schedule 7.04
hereto;

     (h) all Investments by any Credit Party in a direct or indirect Material Subsidiary
(other than Foreign Subsidiaries) of the Borrower, so long as such Material Subsidiary
(other than Foreign Subsidiaries) has executed and delivered a Guaranty and Collateral
Agreement and/or Mortgage in accordance with Section 4.01 and Section 6.09,
and the Equity Interests of such Material Subsidiary owned by the Borrower or a Subsidiary
of the Borrower has been pledged to the Administrative Agent pursuant to a

25

 

Guaranty and
Collateral Agreement in accordance with, and as and to the extent required by, Section
4.01 or Section 6.09;

     (i) extensions of customer or trade credit in the ordinary course of business;

     (j) Guarantee obligations permitted by Section 7.01;

     (k) all Investments constituting Indebtedness permitted by Section 7.01;

     (l) all Investments arising from transactions by the Borrower or any Subsidiary with
customers or suppliers in the ordinary course of business, including endorsements of
negotiable instruments, debt obligations and other Investments received by the Borrower or
any Subsidiary in connection with the bankruptcy or reorganization of customers and in
settlement of delinquent obligations of, and other disputes with, customers; and

     (m) Acquisitions permitted by Section 7.16;

     (n) Investments pursuant to the Closing Transactions;

     (o) Investments pursuant to the Closing Transaction Documents to the extent not
otherwise restricted by the other terms hereof;

     (p) all Investments by any Credit Party in any one or more direct or indirect
Subsidiaries of the Borrower (other than a Material Subsidiary) (i) that own, lease, hold
and/or are party to (A) any gas processing or gas gathering systems, and/or (B) any
gathering systems, pipelines or other similar arrangements, in each case located within or
related to the geographic boundaries of the United States of America, or (ii) the purpose of
which is to act as a direct or indirect holding company for any Subsidiary that satisfies
one or more provisions of subclause (i) of this clause (p), so long as the
Equity Interests of any such Subsidiary owned by such Credit Party have been pledged to the
Administrative Agent pursuant to a Guaranty and Collateral Agreement in accordance with, and
as and to the extent required by, Section 6.08, Section 6.09 and Section
6.13;

     (q) all Investments by any Credit Party in Persons in which such Credit Party owns an
Equity Interest (other than a Material Subsidiary or a direct or indirect Subsidiary of the
Borrower) (i) that own, lease, hold and/or are party to (A) any gas processing or gas
gathering systems, and/or (B) any gathering systems, pipelines or other similar
arrangements, in each case located within or related to the geographic boundaries
of the United States of America, or (ii) the purpose of which is to act as a direct or
indirect holding company for any Person that satisfies one or more provisions of
subclause (i) of this clause (q), so long as the Equity Interests of such
Person owned by such Credit Party have been pledged to the Administrative Agent pursuant to
a Guaranty and Collateral Agreement in accordance with, and as and to the extent required
by, Section 6.08, Section 6.09 and Section 6.13, provided, except to
the extent any such Investments constitute “Permitted Investments” under any other
subsection of this definition, (x) the Credit Parties do not make more than $2,000,000 in
the aggregate of

26

 

any such Investments during any Fiscal Year and (y) the total amount of any
such Investments at any one time does not exceed $7,500,000 in the aggregate;

     (r) entry into operating agreements, processing agreements, contracts for the sale,
transportation or exchange of oil, natural gas or CO2, or other similar or
customary agreements, transactions, properties, interests or arrangements, and Investments
and expenditures in connection therewith or pursuant thereto, in each case made in the
ordinary course of the Credit Parties’ Midstream Activities; and

     (s) any Investments by any Credit Party in any Persons; provided that, the
aggregate amount of all such Investments made pursuant to this clause (s)
outstanding at any time shall not exceed U.S.$5,000,000 (measured on a cost basis).

     For the avoidance of doubt, to the extent any Investment could be attributable to more than
one subsection of this definition of “Permitted Investments,” the Borrower or any other Credit
Party may categorize all or any portion of such Investment to any one or more subsections of this
definition as it elects and unless as otherwise expressly provided, in no event shall the same
portion of any Investment be deemed to utilize or be attributable to more than one subsection of
this definition.

     “Person” means any natural person, corporation, limited liability company, trust,
joint venture, association, company, partnership, Governmental Authority or other entity.

     “Pipeline Systems” means, collectively, (a) the natural gas gathering pipelines
located in the southern portion of the Fort Worth Basin in the State of Texas that are owned or
leased by the Credit Parties in connection with their Midstream Activities, and (b) any other
pipelines now or hereafter owned or leased by any Credit Party that are used in connection with
their Midstream Activities.

     “Plan” means an employee benefit plan within the meaning of Section 3(3) of ERISA
under which any Credit Party or an ERISA Affiliate has any current or future obligation or
liability or under which any present or former employee of any Credit Party or an ERISA Affiliate,
or such present or former employee’s dependents or beneficiaries, has any current or future right
to benefits resulting from the present or former employee’s employment relationship with any Credit
Party or an ERISA Affiliate.

     “Pledging Subsidiary” means each existing and future Subsidiary (other than a Foreign
Subsidiary) of the Borrower that executes and delivers a
Guaranty and Collateral Agreement in accordance with the Loan Documents pursuant to which such
Subsidiary pledges to the Administrative Agent, for the ratable benefit of the Lenders, all of the
outstanding Equity Interests of a Material Subsidiary or other Person owned by such Subsidiary to
secure the Lender Indebtedness.

     “Prime Rate” means, for any day, a fluctuating rate per annum equal to the rate of
interest in effect for such day as publicly announced from time to time by Bank of America as its
“prime rate.” The “prime rate” is a rate set by Bank of America based upon various factors
including Bank of America’s costs and desired return, general economic conditions and other
factors, and is used as a reference point for pricing some loans, which may be priced at, above, or

27

 

below such announced rate. Any change in such rate announced by Bank of America shall take effect
at the opening of business on the day specified in the public announcement of such change.

     “Private Investor Distribution” means the one-time cash distribution to be made by the
Borrower to certain private investors on the Closing Date in an amount not to exceed $10,000,000,
such cash distribution to be made with the proceeds of the IPO and the initial Borrowing hereunder.

     “Processing Plants” means, collectively, (a) the natural gas processing plant located
in Hood County, Texas that is owned by Cowtown Gas and that is used in the Credit Parties’
Midstream Activities and is integrated with the Pipeline Systems described in clause (a) of the
definition thereof, and (b) any other processing plants and terminals now or hereafter owned or
leased by the Credit Parties that are used in their Midstream Activities.

     “Property” means any interest in any kind of property or asset, whether real, personal
or mixed, or tangible or intangible.

     “Purchase Debt” means the aggregate principal amount of the indebtedness, liabilities
and obligations of the Borrower and its Consolidated Subsidiaries, together with interest accrued
thereon, in each case determined on a consolidated basis in accordance with GAAP, associated with
or with respect to any and all of such Persons’ obligations and options to purchase the Specified
Assets in accordance with and pursuant to the Gathering and Processing Agreement or the Omnibus
Agreement, as applicable.

     “Quarterly Dates” means the last day of each March, June, September and December, in
each year, the first of which shall be September 30, 2007.

     “Register” has the meaning set forth in Section 10.04(c).

     “Registration Statement” means the Registration Statement on Form S-1 as it has been
or as it may be amended or supplemented from time to time, filed by the Borrower with the
Securities and Exchange Commission under the Exchange Act to register the offering and sale of the
Common Units in the IPO.

     “Regulation U” means any of Regulations T, U or X of the Board from time to time in
effect and shall include any successor or other regulations or official
interpretations of the Board or any successor Person relating to the extension of credit for
the purpose of purchasing or carrying Margin Stock and which is applicable to member banks of the
Federal Reserve System of any successor Person.

     “Reinvestment Notice” means a written notice executed by a Responsible Officer of the
General Partner on behalf of the Borrower stating that the Credit Parties intend to use a portion
of the Net Cash Proceeds of a Material Asset Disposition to make Capital Expenditures and/or
acquisitions, reparation or restoration of assets useful in their Midstream Activities.

     “Reinvestment Period” means, with respect to any Material Asset Disposition, the
period ending 180 days after receipt of the Net Cash Proceeds from such Material Asset

28

 

Disposition;
provided, that, in the event the Borrower or any other Credit Party has, prior to the end
of any such 180 day period, entered into a definitive contract or agreement to make Capital
Expenditures and/or acquisitions, reparation or restoration of assets useful in their Midstream
Activities utilizing all or a portion of the Net Cash Proceeds received from any such Material
Asset Disposition, then the Reinvestment Period shall be extended until the terms of such contract
or agreement are consummated, but in no event shall such Reinvestment Period be longer than 240
days after receipt of the Net Cash Proceeds from such Material Asset Disposition.

     “Reinvestment Prepayment Amount” means, with respect to any Material Asset
Disposition, the amount of the Net Cash Proceeds received by the Borrower or any of its
Subsidiaries in respect of such Material Asset Disposition (if and only to the extent such Net Cash
Proceeds, taken together with the Net Cash Proceeds of all other Asset Dispositions (a) during the
Fiscal Year of such Asset Disposition, exceed $7,500,000 in the aggregate, or (b) during the term
of this Agreement, exceed $20,000,000 in the aggregate) less any amount expended after receipt of
the Net Cash Proceeds from such Material Asset Disposition on or prior to the end of the relevant
Reinvestment Period to make Capital Expenditures and /or acquisitions, reparation or restoration of
assets useful in the Borrower’s or any other Credit Party’s Midstream Activities.

     “Related Parties” means, with respect to any specified Person, such Person’s
Affiliates and the respective directors, officers, employees, agents and advisors of such Person
and such Person’s Affiliates.

     “Required Lenders” means (a) at any time that the Total Commitment then in effect is
in an amount less than $250,000,000, Lenders having 66 2/3% or more of the Total Commitment at such
time, or, if the Commitments comprising such Total Commitment have terminated, Lenders having 66
2/3% or more of the Aggregate Credit Exposure, and (b) at any time that the Total Commitment then
in effect is equal to or greater than $250,000,000, Lenders having greater than 50% of the Total
Commitment at such time, or, if the Commitments comprising such Total Commitment have terminated,
Lenders having greater than 50% of the Aggregate Credit Exposure; provided, that,
for purposes of Article VIII hereof and the exercise by the Lenders and/or the
Administrative Agent of remedies hereunder and under any other Loan Document, the term “Required
Lenders” shall mean Lenders having 66 2/3% or
more of the Total Commitment at such time or, if the Commitments have terminated, Lenders
having 66 2/3% or more of the Aggregate Credit Exposure.

     “Responsible Officer” means, as to any Person, its Chief Executive Officer, its
President, its Chief Financial Officer, its Vice President-Treasurer, its Assistant Treasurer, its
Vice President-General Counsel, its Vice President and Chief Accounting Officer or any other
officer specified as such to the Administrative Agent in writing by any of the aforementioned
officers of such Person or by resolution of the board of directors or similar governing body of
such Person. Unless otherwise indicated, all references to a Responsible Officer herein means a
Responsible Officer of the General Partner acting on behalf of the Borrower.

     “Restricted Payment” means, with respect to any Person, any Distribution by such
Person.

29

 

     “Revolving Loan” means a Loan made pursuant to Section 2.03.

     “Rolling Period” means, for purposes of calculating the Consolidated Interest Coverage
Ratio and the Consolidated Leverage Ratio as of the last day of each Fiscal Quarter, the period of
four (4) consecutive Fiscal Quarters ending on the last day of such applicable Fiscal Quarter.

     “S&P” means Standard & Poor’s Ratings Services, a division of the McGraw-Hill
Companies, Inc. and any successor thereto that is a nationally recognized rating agency.

     “Secondment Agreement” means that certain Services and Secondment Agreement, dated as
of August 10, 2007, between the Parent and the General Partner, as the same may be amended,
supplemented, restated or otherwise modified from time to time.

     “Secured Affiliate” means any Affiliate of any Lender that has entered into, or
hereafter enters into, a Hedging Agreement with any Credit Party.

     “Security Instruments” means all Mortgages now or hereafter executed and delivered,
all Guaranty and Collateral Agreements now or hereafter executed and delivered, and all other
agreements or instruments described or referred to in Exhibit C-1, together with any
amendments, supplements, restatements or other modifications to any of the foregoing, and any and
all other agreements or instruments now or hereafter executed and delivered by the Borrower or any
other Credit Party (other than participation or similar agreements between any Lender and any other
lender or creditor with respect to any Indebtedness pursuant to this Agreement) pursuant to
Article V or Section 6.09 to secure the payment or performance of the Lender
Indebtedness.

     “SFAS 133” means the Statement of Financial Accounting Standard Number 133 entitled
“Accounting for Derivative Instruments and Hedging Activities”
issued by the Financial Accounting Standards Board in June of 1998, as amended and in effect
from time to time.

     “SFAS 143” means the Statement of Financial Accounting Standard Number 143 entitled
“Accounting for Asset Retirement Obligations” issued by the Financial Accounting Standards Board in
June of 2001, as amended and in effect from time to time.

     “SFAS 144” means the Statement of Financial Accounting Standard Number 144 entitled
“Accounting for the Impairment or Disposal of Long-Lived Assets” issued by the Financial Accounting
Standards Board in August of 2001, as amended and in effect from time to time.

     “Solvent” means, with respect to any Person at any time, a condition under which (a)
the fair saleable value of such Person’s assets is, on the date of determination, greater than the
total amount of such Person’s liabilities (including contingent and unliquidated liabilities) at
such time, (b) such Person is able to pay all of its liabilities as such liabilities mature, (c)
such Person does not intend to, and such Person does not believe it will, incur debts or
liabilities beyond its ability to pay as such debts and liabilities mature, and (d) such Person is
not engaged in a business or transaction, and such Person is not about to engage in a business or
transaction for which such Person’s property would constitute unreasonably small capital after
giving due

30

 

consideration to the prevailing practice in the industry in which such Person is
engaged. For purposes of this definition (i) the amount of a Person’s contingent or unliquidated
liabilities at any time shall be that amount which, in light of all the facts and circumstances
then existing, represents the amount which can reasonably be expected to become an actual or
matured liability, (ii) the “fair saleable value” of an asset shall be the amount which may be
realized within a reasonable time either through collection or sale of such asset at its regular
market value, and (iii) the “regular market value” of an asset shall be the amount which a capable
and diligent business person could obtain for such asset from an interested buyer who is willing to
purchase such asset under ordinary selling conditions.

     “Specified Assets” means all of the assets that the Borrower and/or any of its
Subsidiaries have an obligation or option to purchase pursuant to Section 4.4 of the Gathering and
Processing Agreement and Sections 2.2(b) and 2.3 of the Omnibus Agreement, as such assets are
generally described in “Management Discussion and Analysis of Financial Condition and Results of
Operations — Liquidity and Capital Resources — Asset Repurchase Obligation” of the Registration
Statement.

     “Specified Rate” means, with respect to any Swingline Borrowing for any day, a rate
per annum equal to the Money Market Loan Cost of Funds Rate most recently quoted by Bank of America
and provided to the Borrower and in effect on such day. If for any reason the Administrative Agent
shall have determined (which determination shall be conclusive and binding, absent manifest error)
that it is unable to ascertain the Money Market Loan Cost of Funds Rate for any reason, the
Alternate Base Rate shall be the Specified Rate until the circumstances giving rise to such
inability no longer exist. “Specified Rate,” when used in reference to any Swingline Loan or
Swingline Borrowing, refers to whether such Loan,
or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference
to the Specified Rate.

     “State Pipeline Regulatory Agency” means the Railroad Commission of Texas, and any
successor Governmental Authority thereto.

     “Statutory Reserve Rate” means a fraction (expressed as a decimal), the numerator of
which is the number one and the denominator of which is the number one minus the aggregate of the
applicable maximum reserve percentages (including any marginal, special, emergency or supplemental
reserves) expressed as a decimal established by the Board to which the Administrative Agent is
subject with respect to the Adjusted Eurodollar Rate for eurocurrency funding (currently referred
to as “Eurocurrency Liabilities” in Regulation D of the Board). Such reserve percentages shall
include those imposed pursuant to such Regulation D. Eurodollar Loans shall be deemed to
constitute eurocurrency funding and to be subject to such reserve requirements without benefit of
or credit for proration, exemptions or offsets that may be available from time to time to any
Lender under such Regulation D or any comparable regulation. The Statutory Reserve Rate shall be
adjusted automatically on and as of the effective date of any change in any reserve percentage.

     “subsidiary” means, with respect to any Person (the “parent”) at any date, any
corporation, limited liability company, partnership (limited or general), association or other
entity the accounts of which would be consolidated with those of the parent in the parent’s

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consolidated financial statements if such financial statements were prepared in accordance with
GAAP as of such date.

     “Subsidiary” means any subsidiary of the Borrower.

     “Supermajority Lenders” means Lenders holding Commitments (or Aggregate Credit
Exposure, as applicable) in the aggregate greater than or equal to 90% of the Total Commitment, or,
if the Commitments have been terminated, the Aggregate Credit Exposure.

     “Supplemental Indenture” means that certain First Supplemental Indenture, dated as of
March 16, 2006, by and among the Parent, the subsidiary guarantors parties thereto and The Bank of
New York, as Trustee (as successor in interest to JPMorgan Chase Bank, National Association), as
such First Supplemental Indenture may be amended, modified, restated, supplemented or replaced from
time to time.

     “Sweep Accounts” means deposit accounts, the proceeds of which are transferred nightly
to an interest-bearing concentration account maintained by the Administrative Agent or another
Lender (provided that upon an Event of Default such Lender shall, at the request of the
Administrative Agent, enter into a control agreement with the Administrative Agent and the
appropriate Credit Party in form and substance reasonably satisfactory to the Administrative
Agent), and re-transferred each morning to the applicable Credit Party’s deposit accounts, all on
terms and conditions reasonably satisfactory to the Administrative Agent.

     “Swingline Exposure” means, at any time, the aggregate principal amount of all
Swingline Loans outstanding at such time. The Swingline Exposure of any Lender at any time shall
be its Applicable Percentage of the total Swingline Exposure at such time.

     “Swingline Lender” means Bank of America in its capacity as lender of Swingline Loans
hereunder.

     “Swingline Loan” means a Loan made pursuant to Section 2.05.

     “Syndication Agent” means BNP Paribas, in its capacity as syndication agent for the
Lenders hereunder, and its successors in such capacity.

     “Taxes” means any and all present or future taxes, levies, imposts, duties,
deductions, charges or withholdings imposed by any Governmental Authority.

     “Total Commitment” means the aggregate of all Lenders’ Commitments. The initial Total
Commitment is $150,000,000.

     “Type,” when used in reference to any Loan or Borrowing, refers to whether the rate of
interest on such Loan, or on the Loans comprising such Borrowing, is determined by reference to the
Adjusted Eurodollar Rate, the Alternate Base Rate or, with respect to Swingline Loans or Swingline
Borrowings only, the Specified Rate.

     “UCC” means the Uniform Commercial Code as from time to time in effect in any
applicable state or jurisdiction, as the same may be amended from time to time.

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          “Unreimbursed Amount” has the meaning given such term in Section 2.06(c)(i)

          “Wholly Owned Subsidiary” means, as to any Person, any Subsidiary of which all of the
outstanding shares of Equity Interests (other than directors’ qualifying shares) on a fully-diluted
basis, are owned (whether legally or beneficially by agreement) directly or indirectly by such
Person or one or more of its Wholly-Owned Subsidiaries or by such Person and one or more of its
Wholly-Owned Subsidiaries. Unless otherwise indicated, each reference to a “Wholly-Owned
Subsidiary” means a Wholly-Owned Subsidiary of the Borrower.

     Section 1.02 Classification of Loans and Borrowings. For purposes of this Agreement,
Loans and Borrowings may be classified and referred to by Class (e.g., a “Revolving Loan” or
Revolving Borrowing”), or by Type (e.g., a “Eurodollar Loan” or “Eurodollar Borrowing”) or by Class
and Type (e.g., an “ABR Revolving Loan” or “ABR Revolving Borrowing”).

     Section 1.03 Terms Generally. The definitions of terms herein shall apply equally to
the singular and plural forms of the terms defined. Whenever the context may require, any pronoun
shall include the corresponding masculine, feminine and neuter forms. The words “include,”
“includes” and “including” shall be deemed to be followed by the phrase “without
limitation”. The word “will” shall be construed to have the same meaning and effect as the
word “shall”. Unless the context requires otherwise (a) any definition of or reference to any
agreement, instrument or other document herein shall be construed as referring to such agreement,
instrument or other document as from time to time amended, restated, increased, renewed, extended,
supplemented or otherwise modified (subject to any restrictions on such amendments, restatements,
increases, renewals, extensions, supplements or modifications set forth herein), (b) any reference
herein to any Person shall be construed to include such Person’s successors and assigns, provided
such successors and assigns are permitted by the Loan Documents, (c) the words “herein,” “hereof”
and “hereunder,” and words of similar import, shall be construed to refer to this Agreement in its
entirety and not to any particular provision hereof, (d) all references herein to Articles,
Sections, Exhibits and Schedules shall be construed to refer to Articles and Sections of, and
Exhibits and Schedules to, this Agreement and (e) the words “asset” and “property” shall be
construed to have the same meaning and effect and to refer to any and all tangible and intangible
assets and properties, including cash, securities, accounts and contract rights.

     Section 1.04 Accounting Terms; GAAP. Except as otherwise expressly provided herein,
all terms of an accounting or financial nature shall be construed in accordance with GAAP, as in
effect from time to time; provided that, if the Borrower notifies the
Administrative Agent that the Borrower requests an amendment to any provision hereof to eliminate
the effect of any change occurring after the date hereof in GAAP or in the application thereof on
the operation of such provision (or if the Administrative Agent notifies the Borrower that the
Required Lenders request an amendment to any provision hereof for such purpose), regardless of
whether any such notice is given before or after such change in GAAP or in the application thereof,
then such provision shall be interpreted on the basis of GAAP as in effect and applied immediately
before such change shall have become effective until such notice shall have been withdrawn or such
provision amended in accordance herewith.

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     Section 1.05 Letter of Credit Amounts. Unless otherwise specified herein, the amount
of a Letter of Credit at any time shall be deemed to be the stated amount of such Letter of Credit
in effect at such time; provided, however, that with respect to any Letter of
Credit that, by its terms or the terms of any Issuer Document related thereto, provides for one or
more automatic increases in the stated amount thereof, the amount of such Letter of Credit shall be
deemed to be the maximum stated amount of such Letter of Credit after giving effect to all such
increases, whether or not such maximum stated amount is in effect at such time.

     Section 1.06 Designation of Material Subsidiaries. The Borrower shall from time to
time, by notice in writing to the Administrative Agent, be entitled to designate that either (a) a
Subsidiary which is not a Material Subsidiary become a Material Subsidiary (in which event the
Borrower will comply (or cause compliance) with the provisions of Section 6.09 with respect
to such Subsidiary), or (b) a Material Subsidiary which has previously been designated in writing
by the Borrower as a Material Subsidiary (and is not otherwise a Material Subsidiary pursuant to
clauses (c)(ii) or (c)(iii) of the definition thereof) cease to be a Material
Subsidiary; provided, that the Borrower shall not be entitled to designate that a
Material Subsidiary cease to be a Material Subsidiary if a Default or Event of Default has occurred
and is continuing or would result from or exist immediately after such a designation.

     Section 1.07 Rounding. Any financial ratios required to be maintained by the Borrower
pursuant to this Agreement shall be calculated by dividing the appropriate component by the other
component, carrying the result to one place more than the number of places by which such ratio is
expressed herein and rounding the result up or down to the nearest number (with a rounding-up if
there is no nearest number).

     Section 1.08 Times of Day. Unless otherwise specified, all references herein to times
of day shall be references to Central time (daylight or standard, as applicable).

ARTICLE II

THE CREDITS

     Section 2.01 Revolving Commitments. Subject to the terms and conditions set forth
herein, each Lender severally agrees to make Revolving Loans to the Borrower from time to time
during the Availability Period in an aggregate principal amount that will not result in such
Lender’s Credit Exposure exceeding such Lender’s Commitment; provided, however,
that, the Aggregate Credit Exposure at any one time outstanding shall not exceed the Total
Commitment. Within the foregoing limits and subject to the terms and conditions set forth herein,
the Borrower may borrow, prepay and reborrow Revolving Loans.

     Section 2.02 Loans and Borrowings.

          (a) Each Revolving Loan shall be made as part of a Revolving Borrowing consisting of Revolving
Loans made by the Lenders ratably in accordance with their respective Applicable Percentages. Any
Swingline Loan shall be made in accordance with the procedures set forth in Section 2.05.
The failure of any Lender to make any Revolving Loan required to be made by it hereunder shall not
relieve any other Lender of its obligations hereunder; provided,

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          that, the
Commitments of the Lenders are several and no Lender shall be responsible for any other Lender’s
failure to make a Revolving Loan as required.

          (b) Subject to Section 2.13 and Section 2.14, each Revolving Borrowing shall
be comprised entirely of ABR Revolving Loans or Eurodollar Loans as the Borrower may request in
accordance herewith. Each Swingline Borrowing shall be comprised entirely of ABR Loans or
Specified Rate Loans as the Borrower may request in accordance herewith. Each Lender at its option
may make any Eurodollar Loan by causing any domestic or foreign branch or Affiliate of such Lender
to make such Loan; provided, that, any exercise of such option shall not affect the
obligation of the Borrower to repay such Loan in accordance with the terms of this Agreement.

          (c) At the commencement of each Interest Period for any Eurodollar Borrowing, such Borrowing
shall be in an aggregate amount that is an integral multiple of $500,000 and not less than
$1,000,000. At the time that each ABR Revolving Borrowing is made, such Borrowing shall be in an
aggregate amount that is an integral multiple of $100,000 and not less than $500,000;
provided, that, an ABR Revolving Borrowing may be in an aggregate amount that is
equal to the entire unused balance of the Total Commitment. Each Swingline Borrowing shall be in
an amount that is an integral multiple of $100,000 and not less than $500,000. Borrowings of more
than one Type and Class may be outstanding at the same
time; provided, that, there shall not be more than a total of five (5)
Eurodollar Borrowings outstanding at any time.

          (d) Notwithstanding any other provision of this Agreement, the Borrower shall not be entitled
to elect to convert or continue any Borrowing if the Interest Period (as applicable) requested with
respect thereto would end after the Maturity Date.

     Section 2.03 Requests for Revolving Borrowings. To request a Revolving Borrowing, the
Borrower shall notify the Administrative Agent of such request by telephone, telecopy or electronic
mail (a) in the case of a Eurodollar Borrowing, not later than 12:00 noon, Dallas, Texas time,
three Business Days before the date of the proposed Borrowing, or (b) in the case of an ABR
Revolving Borrowing, not later than 12:00 noon, Dallas, Texas time, on the Business Day of the
proposed Borrowing. Each such Borrowing Request shall be irrevocable and shall be confirmed
promptly by hand delivery, telecopy or electronic mail to the Administrative Agent of a written
Borrowing Request substantially in the form of Exhibit B-1, or otherwise in a form approved
by the Administrative Agent, and signed by a Responsible Officer of the General Partner on behalf
of the Borrower. Each such telephonic and written Borrowing Request shall specify the following
information in compliance with Section 2.02:

     (i) the aggregate amount of the requested Revolving Borrowing;

     (ii) the date of such Revolving Borrowing, which shall be a Business Day;

     (iii) whether such Revolving Borrowing is to be an ABR Revolving Borrowing or a
Eurodollar Borrowing;

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     (iv) in the case of a Eurodollar Borrowing, the initial Interest Period to be
applicable thereto, which shall be a period contemplated by the definition of the term
“Interest Period;” and

     (v) the location and number of the Borrower’s account to which funds are to be
disbursed, which shall comply with the requirements of Section 2.04.

          If no election as to the Type of Revolving Borrowing is specified, then the requested
Revolving Borrowing shall be an ABR Revolving Borrowing. If no Interest Period is specified with
respect to any requested Eurodollar Borrowing, then the Borrower shall be deemed to have selected
an Interest Period of one month’s duration. Promptly following receipt of a Borrowing Request in
accordance with this Section 2.03, the Administrative Agent shall advise each Lender of the
details thereof and of the amount of such Lender’s Revolving Loan to be made as part of the
requested Revolving Borrowing.

     Section 2.04 Funding of Borrowings.

          (a) Each Lender shall make each Loan to be made by it hereunder on the proposed date thereof
by wire transfer of immediately available funds by 1:00 p.m., Dallas, Texas time (or 2:00 p.m.,
Dallas Texas time in the case of an ABR Revolving Borrowing requested on the same date or pursuant
to Section 2.06(c)), to the account of the Administrative
Agent designated by it for such purpose by notice to the Lenders; provided, that
Swingline Loans shall be made as provided in Section 2.05. The Administrative Agent will
make such Loans available to the Borrower by promptly crediting the amounts so received, in like
funds, to an account of the Borrower designated by the Borrower in the applicable Borrowing Request
or otherwise by written notice to the Administrative Agent; provided, that ABR Revolving
Loans made to finance any Unreimbursed Amount as provided in Section 2.06(c) shall be
remitted by the Administrative Agent to the L/C Issuer.

          (b) Unless the Administrative Agent shall have received notice from a Lender prior to the
proposed date of any Borrowing that such Lender will not make available to the Administrative Agent
such Lender’s share of such Borrowing, the Administrative Agent may assume that such Lender has
made such share available on such date in accordance with Section 2.04(a) and may, in
reliance upon such assumption, make available to the Borrower a corresponding amount. In such
event, if a Lender has not in fact made its share of such Borrowing available to the Administrative
Agent, then the applicable Lender and the Borrower severally agree to pay to the Administrative
Agent forthwith on demand such corresponding amount with interest thereon, for each day from and
including the date such amount is made available to the Borrower to but excluding the date of
payment to the Administrative Agent, at (i) in the case of such Lender, the greater of the Federal
Funds Effective Rate and a rate determined by the Administrative Agent in accordance with banking
industry rules on interbank compensation or (ii) in the case of the Borrower, the interest rate
applicable to such Borrowing (provided that any such demand made to the Borrower shall be made
within five (5) Business Days following disbursement by the Administrative Agent, or the
Administrative Agent shall be deemed to have waived the right to make such demand for immediate
reimbursement from the Borrower and such funded amount shall be, as with respect to the Borrower,
deemed to be a

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Loan hereunder). If such Lender pays such amount to the Administrative Agent, then
such amount shall constitute such Lender’s Loan included in such Borrowing.

     Section 2.05 Swingline Loans.

          (a) Subject to the terms and conditions set forth herein, the Swingline Lender agrees to make
Swingline Loans to the Borrower from time to time during the Availability Period in an aggregate
principal amount that will not result in (i) the aggregate Swingline Exposure exceeding
$25,000,000, (ii) the Credit Exposure of any Lender exceeding the Commitment of such Lender then in
effect, or (iii) the Aggregate Credit Exposure then in effect exceeding the Total Commitment then
in effect; provided that the Swingline Lender shall not be required to make a
Swingline Loan to refinance an outstanding Swingline Loan. Within the foregoing limits and subject
to the terms and conditions set forth herein, the Borrower may borrow, prepay and reborrow
Swingline Loans.

          (b) To request a Swingline Loan, the Borrower shall notify the Administrative Agent of such
request by telephone, telecopy or electronic mail not later than 12:00 noon, Dallas, Texas time, on
the Business Day of a proposed Swingline Loan. Each such request shall be confirmed promptly by
hand delivery, telecopy or electronic mail to the Administrative Agent of a written Borrowing
Request executed by a Responsible Officer of the General Partner on behalf of the Borrower,
substantially in the form of Exhibit B-3 or otherwise in a form approved by the
Administrative Agent. Each such notice shall be irrevocable and shall specify the requested date
(which shall be a Business Day) and amount of the requested Swingline Loan, and whether such
Loan shall be an ABR Swingline Loan or Specified Rate Swingline Loan. The Administrative Agent
will promptly advise the Swingline Lender of any such notice received from the Borrower. The
Swingline Lender shall make each Swingline Loan available to the Borrower by means of a credit to
an account designated by the Borrower (or, in the case of a Swingline Loan made to finance any
Unreimbursed Amount as provided in Section 2.06(c), by remittance to the L/C Issuer, or
pursuant to such other directions received by the Swingline Lender from the Borrower in connection
with its request for such Swingline Loan) by 2:00 p.m., Dallas, Texas time, on the requested date
of such Swingline Loan.

          (c) The Swingline Lender may by written notice given to the Administrative Agent not later
than 9:00 a.m., Dallas, Texas time, on any Business Day, require the Lenders to acquire
participations on such Business Day in all or a portion of the Swingline Loans outstanding. Such
notice shall specify the aggregate amount of Swingline Loans in which Lenders will participate.
Promptly upon receipt of such notice, the Administrative Agent will give notice thereof to each
Lender, specifying in such notice such Lender’s Applicable Percentage of such Swingline Loan or
Loans. Each Lender hereby absolutely and unconditionally agrees, upon receipt of notice as
provided above, to pay to the Administrative Agent, for the account of the Swingline Lender, such
Lender’s Applicable Percentage of such Swingline Loan or Loans. Each Lender acknowledges and
agrees that its obligation to acquire participations in Swingline Loans pursuant to this paragraph
is absolute and unconditional and shall not be affected by any circumstance whatsoever, including
the occurrence and continuance of a Default or reduction or termination of the Commitments, and
that each such payment shall be made without any offset, abatement, withholding or reduction
whatsoever. Each Lender shall comply with its obligation under this paragraph by wire transfer of
immediately available funds

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in the same manner as provided in Section 2.04 with respect to
Loans made by such Lender (and Section 2.04 shall apply, mutatis mutandis,
to the payment obligations of the Lenders), and the Administrative Agent shall promptly pay to the
Swingline Lender the amounts so received by it from the Lenders. The Administrative Agent shall
notify the Borrower of any participations in any Swingline Loan acquired pursuant to this
paragraph, and thereafter payments in respect of such Swingline Loan shall be made to the
Administrative Agent and not to the Swingline Lender. Any amounts received by the Swingline Lender
from the Borrower (or other party on behalf of the Borrower) in respect of a Swingline Loan after
receipt by the Swingline Lender of the proceeds of a sale of participations therein shall be
promptly remitted to the Administrative Agent; any such amounts received by the Administrative
Agent shall be promptly remitted by the Administrative Agent to the Lenders that shall have made
their payments pursuant to this paragraph and to the Swingline Lender, as their interests may
appear; provided that any such payment so remitted shall be repaid to the Swingline Lender
or to the Administrative Agent, as applicable, if and to the extent such payment is required to be
refunded to the Borrower for any reason. The purchase of participations in a Swingline Loan
pursuant to this paragraph shall not relieve the Borrower of any default in the payment thereof.

          (d) The unpaid principal amount of each Swingline Loan shall be due and payable on the earlier
of (i) the Maturity Date, and (ii) the first date after such Swingline Loan is made that is the
15th or last day of a calendar month and is at least five (5) Business Days after such
Swingline Loan is made; provided that, on each date that a Revolving Borrowing (other than
a Revolving Borrowing resulting from the conversion or continuation of an existing
Revolving Borrowing) is made, the Borrower shall repay all Swingline Loans then outstanding;
provided further, that, except with respect to Swingline Loans payable on the
Maturity Date, in the event the Borrower has not paid the outstanding principal amount of any
Swingline Loan on or prior to 12:00 noon, Dallas, Texas time, on the date due, the Borrower shall
be deemed to have requested an ABR Revolving Loan (it being understood that if such Swingline Loan
is being refinanced with an ABR Revolving Borrowing, such ABR Revolving Borrowing may be obtained
on the same Business Day as the proposed Borrowing, notwithstanding the advance notice requirements
of Section 2.03(b)) in an amount equal to the outstanding principal amount of such
Swingline Loan maturing on such date, and such Swingline Loan shall be deemed converted to an ABR
Revolving Loan on such date, and shall continue as an ABR Revolving Loan until converted in
accordance with Section 2.07.

          (e) Each Swingline Borrowing initially shall be of the Type specified in the applicable
Borrowing Request (or an ABR Swingline Borrowing if no Type is specified). Thereafter, the
Borrower may elect from time to time to convert such Swingline Borrowing to a different Class, all
as provided in this Section. This Section shall not apply to the continuation of Swingline
Borrowings, or to the conversion of Swingline Borrowings to a different Type, which Swingline
Borrowings may not be continued or so converted.

          (f) To make an election pursuant to Section 2.05(e), the Borrower shall notify the
Administrative Agent of such election by telephone, telecopy or electronic mail by the time that a
Borrowing Request would be required under Section 2.03 if the Borrower were requesting a
Revolving Borrowing of the Type resulting from such election to be made on the effective date of
such election. Each such Interest Election Request shall be irrevocable and shall be confirmed
promptly by hand delivery, telecopy or electronic mail to the Administrative Agent of a written

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Interest Election Request executed by a Responsible Officer of the General Partner on behalf of the
Borrower, substantially in the form of Exhibit B-4 or otherwise in a form approved by the
Administrative Agent. The Administrative Agent will promptly advise the Swingline Lender of any
such notice received from the Borrower.

          (g) Each telephonic and written Interest Election Request pursuant to this Section
2.05 shall specify the following information in compliance with this Section 2.05:

     (i) the Swingline Borrowing to which such Interest Election Request applies;

     (ii) the effective date of the election made pursuant to such Interest Election
Request, which shall be a Business Day;

     (iii) whether the resulting Revolving Borrowing is to be an ABR Revolving Borrowing or
a Eurodollar Borrowing; and

     (iv) if the resulting Revolving Borrowing is a Eurodollar Borrowing, the Interest
Period to be applicable thereto after giving effect to such election, which shall be a
period contemplated by the definition of the term “Interest Period”.

If any such Interest Election Request requests a Eurodollar Borrowing but does not specify an
Interest Period, then the Borrower shall be deemed to have selected an Interest Period of one
month’s duration.

          (h) Promptly following receipt of an Interest Election Request pursuant to this Section
2.05, the Administrative Agent shall advise each Lender of the details thereof and of such
Lender’s portion of each resulting Revolving Borrowing.

          (i) Notwithstanding any contrary provision hereof, if an Event of Default has occurred and is
continuing and the Administrative Agent, at the request of the Required Lenders, so notifies the
Borrower, then, so long as such Event of Default is continuing, no outstanding Swingline Borrowing
may be converted to a Eurodollar Borrowing.

     Section 2.06 Letters of Credit.

     (a) (i) Subject to the terms and conditions set forth herein, (A) L/C Issuer
agrees, in reliance upon the agreements of the Lenders set forth in this Section
2.06, (1) from time to time on any Business Day during the Availability Period,
to issue Letters of Credit for the account of the Borrower or for the account of any
of its Subsidiaries (other than a Foreign Subsidiary), and to amend Letters of
Credit previously issued by it, in accordance with subsection (b) below, and
(2) to honor drawings under the Letters of Credit; and (B) the Lenders severally
agree to participate in Letters of Credit issued for the account of the Borrower or
its Subsidiaries and any drawings thereunder; provided that after giving
effect to any L/C Credit Extension with respect to any Letter of Credit, (y) the
Aggregate Credit Exposure then in effect shall not exceed the Total Commitment then
in effect, and (z) the Credit Exposure of any Lender shall not

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exceed such Lender’s
Commitment. Each request by the Borrower for the issuance or amendment of a Letter
of Credit shall be deemed to be a representation by the Borrower that the L/C Credit
Extension so requested complies with the conditions set forth in the proviso to the
preceding sentence. Within the foregoing limits, and subject to the terms and
conditions hereof, the Borrower’s ability to obtain Letters of Credit for its own
account or for the account of any of its Subsidiaries (other than a Foreign
Subsidiary) shall be fully revolving, and accordingly the Borrower may, during the
foregoing period, obtain Letters of Credit to replace Letters of Credit that have
expired or that have been drawn upon and reimbursed.

          (ii) L/C Issuer shall not issue any Letter of Credit, if:

     (A) the expiry date of such requested Letter of Credit (which, in the case of
an “evergreen” Letter of Credit, shall be the first date on which the L/C Issuer can
cause such Letter of Credit to expire) would occur more than twelve months after the
date of issuance or last extension or renewal, unless the Required Lenders have
approved such expiry date; or

     (B) the expiry date of such requested Letter of Credit would occur after the
Maturity Date, unless the Borrower shall, no later than five (5) days prior to the
Maturity Date, Cash Collateralize, for the benefit of the Lenders and the L/C
Issuer, the outstanding L/C Obligations with respect to such Letter of Credit.

          (iii) L/C Issuer shall not be under any obligation to issue any Letter of Credit if:

     (A) any order, judgment or decree of any Governmental Authority or arbitrator
shall by its terms purport to enjoin or restrain L/C Issuer from issuing such Letter
of Credit, or any Governmental Rule applicable to L/C Issuer or any request or
directive (whether or not having the force of law) from any Governmental Authority
with jurisdiction over L/C Issuer shall prohibit, or request that L/C Issuer refrain
from, the issuance of letters of credit generally or such Letter of Credit in
particular or shall impose upon L/C Issuer with respect to such Letter of Credit any
restriction, reserve or capital requirement (for which L/C Issuer is not otherwise
compensated hereunder) not in effect on the Closing Date, or shall impose upon L/C
Issuer any unreimbursed loss, cost or expense which was not applicable on the
Closing Date and which L/C Issuer in good faith deems material to it;

     (B) the issuance of such Letter of Credit would violate one or more policies of
L/C Issuer applicable to letters of credit generally;

     (C) such Letter of Credit is to be denominated in a currency other than
dollars; or

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     (D) a default of any Lender’s obligations to fund under Section 2.06(c)
exists, unless L/C Issuer has entered into reasonably satisfactory arrangements with
the Borrower or such Lender to eliminate L/C Issuer’s risk with respect to such
Lender.

          (iv) L/C Issuer shall not amend any Letter of Credit if L/C Issuer would not be
permitted at such time to issue such Letter of Credit in its amended form under the terms
hereof.

          (v) L/C Issuer shall be under no obligation to amend any Letter of Credit if (A) L/C
Issuer would have no obligation at such time to issue such Letter of Credit in its amended
form under the terms hereof, or (B) the beneficiary of such Letter of Credit does not accept
the proposed amendment to such Letter of Credit.

          (vi) L/C Issuer shall act on behalf of the Lenders with respect to any Letters of Credit
issued by it and the documents associated therewith, and L/C Issuer shall have all of the
benefits and immunities (A) provided to the Administrative Agent in Article IX with
respect to any acts taken or omissions suffered by L/C Issuer in connection with Letters of
Credit issued by it or proposed to be issued by it and Issuer Documents pertaining to such
Letters of Credit as fully as if the term “Administrative
Agent” as used in Article IX included L/C Issuer with respect to such acts or
omissions, and (B) as additionally provided herein with respect to L/C Issuer.

          (b) (i) Each Letter of Credit shall be issued or amended, as the case may be, upon the
request of the Borrower delivered to L/C Issuer (with a copy to the Administrative Agent) in
the form of a Letter of Credit Application, appropriately completed and signed by a
Responsible Officer of the General Partner on behalf of the Borrower. Such Letter of Credit
Application must be received by L/C Issuer and the Administrative Agent not later than 10:00
a.m., Dallas, Texas time, at least two Business Days (or such later date and time as the
Administrative Agent and L/C Issuer may agree in a particular instance in their sole
discretion) prior to the proposed issuance date or date of amendment, as the case may be.
In the case of a request for an initial issuance of a Letter of Credit, such Letter of
Credit Application shall specify in form and detail reasonably satisfactory to L/C Issuer:
(A) the proposed issuance date of the requested Letter of Credit (which shall be a Business
Day); (B) the amount thereof; (C) the expiry date thereof; (D) the name and address of the
beneficiary thereof; (E) the documents to be presented by such beneficiary in case of any
drawing thereunder; (F) the full text of any certificate to be presented by such beneficiary
in case of any drawing thereunder; (G) the purpose and nature of the requested Letter of
Credit; and (H) such other matters as L/C Issuer may reasonably require. In the case of a
request for an amendment of any outstanding Letter of Credit, such Letter of Credit
Application shall specify in form and detail reasonably satisfactory to L/C Issuer (1) the
Letter of Credit to be amended; (2) the proposed date of amendment thereof (which shall be a
Business Day); (3) the nature of the proposed amendment; and (4) such other matters as L/C
Issuer may reasonably require. Additionally, the Borrower shall furnish to L/C Issuer and
the Administrative Agent such other documents and information pertaining to such requested
Letter of

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Credit issuance or amendment, including any Issuer Documents, as L/C Issuer or the
Administrative Agent may reasonably require.

     (ii) Promptly after receipt of any Letter of Credit Application, L/C Issuer will confirm
with the Administrative Agent (by telephone or in writing) that the Administrative Agent has
received a copy of such Letter of Credit Application from the Borrower and, if not, L/C
Issuer will provide the Administrative Agent with a copy thereof. Unless L/C Issuer has
received written notice from any Lender, the Administrative Agent or any Credit Party, at
least one Business Day prior to the requested date of issuance or amendment of the
applicable Letter of Credit, that one or more applicable conditions contained in Section
4.02 shall not then be satisfied, then, subject to the terms and conditions hereof, L/C
Issuer shall, on the requested date, issue a Letter of Credit for the account of the
Borrower (or the applicable domestic Subsidiary) or enter into the applicable amendment, as
the case may be, in each case in accordance with L/C Issuer’s usual and customary business
practices. Immediately upon the issuance of each Letter of Credit, each Lender shall be
deemed to, and hereby irrevocably and unconditionally agrees to, purchase from L/C Issuer a
risk participation in such Letter of Credit in an amount equal to the product of such
Lender’s Applicable Percentage times the amount of such Letter of Credit.

     (iii) Promptly after its delivery of any Letter of Credit or any amendment to a Letter
of Credit to an advising bank with respect thereto or to the beneficiary thereof, L/C Issuer
will also deliver to the Borrower and the Administrative Agent a true and complete copy of
such Letter of Credit or amendment.

     (c) (i) Upon receipt from the beneficiary of any Letter of Credit of any notice of a
drawing under such Letter of Credit, L/C Issuer shall promptly notify the Borrower and the
Administrative Agent thereof. Not later than 1:00 p.m., Dallas, Texas time, on the date of
any payment by L/C Issuer under a Letter of Credit, if the Borrower shall have received
notice of such payment by L/C Issuer prior to 10:00 a.m., Dallas, Texas time, on such date,
or, if such notice has not been received by the Borrower prior to such time on such date,
then not later than 1:00 p.m., Dallas, Texas time, on the Business Day immediately following
the day that the Borrower receives such notice (each such date, an “Honor Date”),
the Borrower shall reimburse L/C Issuer through the Administrative Agent in an amount equal
to the amount of such drawing. If the Borrower fails to so reimburse L/C Issuer by such
time, or if the Borrower otherwise elects prior to 1:00 p.m., Dallas, Texas time on the
Honor Date that such Unreimbursed Amount be financed with an ABR Revolving Borrowing or
Swingline Borrowing, the Administrative Agent shall promptly notify each Lender of the Honor
Date, the amount of the unreimbursed drawing (the “Unreimbursed Amount”), and the
amount of such Lender’s Applicable Percentage thereof. In such event, the Borrower shall be
deemed to have requested an ABR Revolving Borrowing (if the Borrower has failed to reimburse
or otherwise make an election as provided above) or, as applicable, otherwise requested an
ABR Revolving Borrowing or Swingline Borrowing (as the Borrower shall elect), to be
disbursed on the Honor Date in an amount equal to the Unreimbursed Amount, without regard to
the minimum and multiples specified in Section 2.02(c) and Section 2.05 for
the principal amount of ABR Revolving Borrowings or Swingline Borrowings, as applicable,

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but
subject to the amount of the unutilized portion of the Total Commitment and the conditions
set forth in Section 4.02. Any notice given by L/C Issuer or the Administrative
Agent pursuant to this Section 2.06(c)(i) may be given by telephone if immediately
confirmed in writing; provided that the lack of such an immediate confirmation shall
not affect the conclusiveness or binding effect of such notice.

     (ii) Each Lender shall upon any notice pursuant to Section 2.06(c)(i) make funds
available to the Administrative Agent for the account of L/C Issuer at the office of the
Administrative Agent in an amount equal to its Applicable Percentage of the Unreimbursed
Amount not later than 1:00 p.m., Dallas, Texas time, on the Business Day specified in such
notice by the Administrative Agent, whereupon, subject to the provisions of Section
2.06(c)(iii), each Lender that so makes funds available shall be deemed to have made an
ABR Loan to the Borrower in such amount. The Administrative Agent shall remit the funds so
received to L/C Issuer.

     (iii) With respect to any Unreimbursed Amount that is not fully refinanced by an ABR
Revolving Borrowing or Swingline Borrowing because the conditions set forth in Section
4.02 cannot be satisfied or for any other reason, the Borrower shall be deemed to have
incurred from L/C Issuer an L/C Borrowing in the
amount of the Unreimbursed Amount that is not so refinanced, which L/C Borrowing shall
be due and payable on demand (together with interest) and, if such Unreimbursed Amount is
not reimbursed within five days after such Unreimbursed Amount is due pursuant to
Section 2.06(c)(i), shall bear interest at the rate set forth in Section
2.12(d). In such event, each Lender’s payment to the Administrative Agent for the
account of L/C Issuer pursuant to Section 2.06(c)(ii) shall be deemed payment in
respect of its participation in such L/C Borrowing and shall constitute an L/C Advance from
such Lender in satisfaction of its participation obligation under this Section 2.06.

     (iv) Until each Lender funds its Loan or L/C Advance pursuant to this Section
2.06(c) to reimburse L/C Issuer for any amount drawn under any Letter of Credit,
interest in respect of such Lender’s Applicable Percentage of such amount shall be solely
for the account of L/C Issuer.

     (v) Each Lender’s obligation to make Loans or L/C Advances to reimburse L/C Issuer for
amounts drawn under Letters of Credit, as contemplated by this Section 2.06(c),
shall be absolute and unconditional and shall not be affected by any circumstance, including
(A) any setoff, counterclaim, recoupment, defense or other right which such Lender may have
against L/C Issuer, the Borrower or any other Person for any reason whatsoever; (B) the
occurrence or continuance of a Default, or (C) any other occurrence, event or condition,
whether or not similar to any of the foregoing; provided, however, that each Lender’s
obligation to make Loans pursuant to this Section 2.06(c) is subject to the
conditions set forth in Section 4.02. No such making of an L/C Advance shall
relieve or otherwise impair the obligation of the Borrower to reimburse L/C Issuer for the
amount of any payment made by L/C Issuer under any Letter of Credit, together with interest
as provided herein.

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     (vi) If any Lender fails to make available to the Administrative Agent for the account
of L/C Issuer any amount required to be paid by such Lender pursuant to the foregoing
provisions of this Section 2.06(c) by the time specified in Section
2.06(c)(ii), L/C Issuer shall be entitled to recover from such Lender (acting through
the Administrative Agent), on demand, such amount with interest thereon for the period from
the date such payment is required to the date on which such payment is immediately available
to L/C Issuer at a rate per annum equal to the greater of the Federal Funds Effective Rate
and a rate determined by L/C Issuer in accordance with banking industry rules on interbank
compensation. A certificate of L/C Issuer submitted to any Lender (through the
Administrative Agent) with respect to any amounts owing under this clause (vi) shall
be conclusive absent manifest error.

     (d) (i) At any time after L/C Issuer has made a payment under any Letter of Credit and
has received from any Lender such Lender’s L/C Advance in respect of such payment in
accordance with Section 2.06(c), if the Administrative Agent receives for the
account of L/C Issuer any payment in respect of the related Unreimbursed Amount or interest
thereon (whether directly from the Borrower or otherwise, including proceeds of Cash
Collateral applied thereto by the Administrative Agent), the Administrative Agent will
distribute to such Lender its Applicable Percentage thereof (appropriately adjusted, in the
case of interest payments, to reflect the period of time
during which such Lender’s L/C Advance was outstanding) in the same funds as those
received by the Administrative Agent.

     (ii) If any payment received by the Administrative Agent for the account of L/C Issuer
pursuant to Section 2.06(c)(i) is required to be returned or set aside (including
pursuant to any settlement entered into by L/C Issuer in its discretion), each Lender shall
pay to the Administrative Agent for the account of L/C Issuer its Applicable Percentage
thereof on demand of the Administrative Agent, plus interest thereon from the date of such
demand to the date such amount is returned by such Lender, at a rate per annum equal to the
Federal Funds Effective Rate from time to time in effect. The obligations of the Lenders
under this clause (ii) shall survive the payment in full of the Lender Indebtedness
and the termination of this Agreement.

     (e) The obligation of the Borrower to reimburse L/C Issuer for each drawing under each Letter
of Credit and to repay each L/C Borrowing shall be absolute, unconditional and irrevocable, and
shall be paid strictly in accordance with the terms of this Agreement under all circumstances,
including the following:

     (i) any lack of validity or enforceability of such Letter of Credit, any Issuer
Document, this Agreement, or any other Loan Document;

     (ii) the existence of any claim, counterclaim, setoff, defense or other right that the
Borrower or any Subsidiary may have at any time against any beneficiary or any transferee of
such Letter of Credit (or any Person for whom any such beneficiary or any such transferee
may be acting), L/C Issuer or any other Person, whether in connection with this Agreement,
the transactions contemplated hereby or by such Letter of Credit or any agreement or
instrument relating thereto, or any unrelated transaction;

44

 

     (iii) any draft, demand, certificate or other document presented under such Letter of
Credit proving to be forged, fraudulent, invalid or insufficient in any respect or any
statement therein being untrue or inaccurate in any respect; or any loss or delay in the
transmission or otherwise of any document required in order to make a drawing under such
Letter of Credit;

     (iv) any payment by L/C Issuer under such Letter of Credit against presentation of a
draft or certificate that does not strictly comply with the terms of such Letter of Credit
(as amended); or any payment made by L/C Issuer under such Letter of Credit to any Person
purporting to be a trustee in bankruptcy, debtor-in-possession, assignee for the benefit of
creditors, liquidator, receiver or other representative of or successor to any beneficiary
or any transferee of such Letter of Credit, including any arising in connection with any
proceeding under any bankruptcy code or debtor relief law; or

     (v) any other circumstance or happening whatsoever, whether or not similar to any of
the foregoing, including any other circumstance that might otherwise constitute a defense
available to, or a discharge of, the Borrower or any Subsidiary.

     The Borrower shall promptly examine a copy of each Letter of Credit and each amendment thereto
that is delivered to it and, in the event of any claim of noncompliance with the Borrower’s
instructions or other irregularity, the Borrower will immediately notify L/C Issuer. The Borrower
shall be conclusively deemed to have waived any such claim against L/C Issuer and its
correspondents unless such notice is given as aforesaid.

          (f) Each Lender and the Borrower agree that, in paying any drawing under a Letter of Credit,
L/C Issuer shall not have any responsibility to obtain any document (other than any sight draft,
certificates and documents expressly required by the Letter of Credit) or to ascertain or inquire
as to the validity or accuracy of any such document or the authority of the Person executing or
delivering any such document. None of L/C Issuer, the Administrative Agent, any of their
respective Related Parties nor any correspondent, participant or assignee of L/C Issuer shall be
liable to any Lender for (i) any action taken or omitted in connection herewith at the request or
with the approval of Lenders or Required Lenders, as applicable; (ii) any action taken or omitted
in the absence of gross negligence or willful misconduct; or (iii) the due execution,
effectiveness, validity or enforceability of any document or instrument related to any Letter of
Credit or Issuer Document. The Borrower hereby assumes all risks of the acts or omissions of any
beneficiary or transferee with respect to its use of any Letter of Credit; provided,
however, that this assumption is not intended to, and shall not, preclude the Borrower
pursuing such rights and remedies as it may have against the beneficiary or transferee at law or
under any other agreement. None of L/C Issuer, the Administrative Agent, any of their respective
Related Parties nor any correspondent, participant or assignee of L/C Issuer shall be liable or
responsible for any of the matters described in clauses (i) through (v) of
Section 2.06(e); provided, however, that anything in such clauses to the
contrary notwithstanding, the Borrower may have a claim against L/C Issuer, and L/C Issuer may be
liable to the Borrower, to the extent, but only to the extent, of any direct, as opposed to
consequential or exemplary, damages suffered by the Borrower which the Borrower proves were caused
by L/C Issuer’s willful misconduct or gross negligence or L/C Issuer’s willful failure to pay under
any Letter of Credit after the

45

 

presentation to it by the beneficiary of a sight draft and
certificate(s) strictly complying with the terms and conditions of a Letter of Credit. In
furtherance and not in limitation of the foregoing, L/C Issuer may accept documents that appear on
their face to be in order, without responsibility for further investigation, regardless of any
notice or information to the contrary, and L/C Issuer shall not be responsible for the validity or
sufficiency of any instrument transferring or assigning or purporting to transfer or assign a
Letter of Credit or the rights or benefits thereunder or proceeds thereof, in whole or in part,
which may prove to be invalid or ineffective for any reason.

          (g) Upon the written request of the Administrative Agent if (i) as of the Maturity Date, any
L/C Obligation for any reason remains outstanding (and has not otherwise been Cash Collateralized
pursuant to, and in accordance with Section 2.06(a)(ii)(B)), or (ii) any Event of Default
shall occur and be continuing, the Borrower shall, in each case, on the Business Day that the
Borrower receives such written request, immediately Cash Collateralize the then outstanding L/C
Obligations. For purposes of this Section 2.06 and the other applicable provisions of this
Agreement, “Cash Collateralize” means to pledge and deposit with or deliver to the
Administrative Agent, for the benefit of L/C Issuer and the Lenders, as collateral for the L/C
Obligations, cash or deposit account balances pursuant to documentation in form and substance
reasonably satisfactory to the Administrative Agent and
L/C Issuer (which documents are hereby consented to by the Lenders). Cash Collateral shall be
maintained in deposit accounts with the Administrative Agent. The Borrower hereby grants to the
Administrative Agent, for the benefit of L/C Issuer and the Lenders, a security interest in all
such cash, deposit accounts and all balances therein and all proceeds of the foregoing, and the
Administrative Agent shall have exclusive dominion and control, including the exclusive right of
withdrawal, over such account. Subject to Section 8.02, each such deposit hereunder shall
be held by the Administrative Agent as collateral for the payment and performance of the L/C
Obligations. Subject to the proviso at the end of this sentence, other than any interest, if any,
earned on the investment of such deposits, which investments shall be made at the option and
reasonable discretion of the Administrative Agent (provided that it has received sufficient
protection and indemnities as it reasonably requests in connection with its investing such cash
collateral) and at the Borrower’s risk and expense, such deposits shall not bear interest;
provided, that, the Borrower may direct the Administrative Agent to invest amounts credited
to such account, at the Borrower’s risk and expense, in Permitted Investments described in
clauses (a), (b), (e) and (f) of the definition of “Permitted
Investments.” Interest or profits, if any, on such investments shall accumulate in such account.
Subject to Section 8.02, moneys in such account shall be applied by the Administrative
Agent to reimburse L/C Issuer for L/C Borrowings for which it has not been reimbursed and, to the
extent not so applied, shall be held for the satisfaction of the reimbursement obligations of the
Borrower for the aggregate L/C Obligations at such time or, if the maturity of the Loans has been
accelerated (but subject to the consent of Lenders holding L/C Obligations greater than 50% of the
aggregate L/C Obligations at such time), be applied to satisfy other obligations of the Borrower
under this Agreement. Subject to Section 8.02, if the Borrower is required to provide an
amount of Cash Collateral hereunder, such amount (to the extent not applied as aforesaid) shall be
returned to the Borrower as L/C Obligations are satisfied or reimbursed, and as and to the extent
that, after giving effect to such return, the Borrower would remain in compliance with Section
2.10 and no Event of Default shall have occurred and be continuing.

46

 

          (h) Unless otherwise expressly agreed by L/C Issuer and the Borrower when a Letter of Credit
is issued the rules of the ISP shall apply to each Letter of Credit.

          (i) The Borrower shall pay to the Administrative Agent for the account of each Lender in
accordance with its Applicable Percentage a Letter of Credit fee (the “Letter of Credit
Fee”) for each Letter of Credit equal to the Applicable Rate for Eurodollar Loans times the
daily amount available to be drawn under such Letter of Credit during the period from and including
the date such Letter of Credit is issued to but excluding the date such Letter of Credit expires.
For purposes of computing the daily amount available to be drawn under any Letter of Credit, the
amount of such Letter of Credit shall be determined in accordance with Section 1.05.
Letter of Credit Fees shall be (i) computed on a quarterly basis in arrears and (ii) due and
payable on each Payment Date, commencing with the first such date to occur after the issuance of
such Letter of Credit, on the Maturity Date and thereafter on demand. If there is any change in
the Applicable Rate for Eurodollar Loans during any Fiscal Quarter, the daily amount available to
be drawn under each Letter of Credit shall be computed and multiplied by the Applicable Rate for
Eurodollar Loans separately for each period during such Fiscal Quarter that such Applicable Rate
for Eurodollar Loans was in effect.

          (j) The Borrower shall pay directly to L/C Issuer for its own account a fronting fee with
respect to each issued and outstanding Letter of Credit, at the rate per annum equal to 0.125%,
computed on the daily amount available to be drawn under such Letter of Credit on a quarterly basis
in arrears during the period from and including the date such Letter of Credit is issued to but
excluding the date such Letter of Credit expires. Such fronting fee shall be due and payable on
each Payment Date in respect of the most recently-ended quarterly period (or portion thereof, in
the case of the first payment), commencing with the first such date to occur after the issuance of
such Letter of Credit, on the Maturity Date and thereafter on demand. For purposes of computing
the daily amount available to be drawn under any Letter of Credit, the amount of such Letter of
Credit shall be determined in accordance with Section 1.05. In addition, the Borrower
shall pay directly to L/C Issuer for its own account the customary issuance, presentation,
amendment and other processing fees, and other standard costs and charges, of L/C Issuer relating
to letters of credit as from time to time in effect. Such customary fees and standard costs and
charges are due and payable within ten Business Days after Borrower’s receipt of written demand
therefor and are nonrefundable.

          (k) In the event of any conflict between the terms hereof and the terms of any Issuer
Document, the terms hereof shall control.

          (l) Notwithstanding that a Letter of Credit issued or outstanding hereunder is in support of
any obligations of, or is for the account of, a Subsidiary (other than a Foreign Subsidiary), the
Borrower shall be obligated to reimburse L/C Issuer hereunder for any and all drawings under such
Letter of Credit. The Borrower hereby acknowledges that the issuance of Letters of Credit for the
account of Subsidiaries (other than Foreign Subsidiaries) inures to the benefit of the Borrower,
and that the Borrower’s business derives substantial benefits from the businesses of such
Subsidiaries.

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     Section 2.07 Interest Elections.

          (a) Each Revolving Borrowing initially shall be of the Type specified in the applicable
Borrowing Request or Interest Election Request and, in the case of a Eurodollar Borrowing, shall
have an initial Interest Period as specified in such applicable Borrowing Request or Interest
Election Request. Thereafter, the Borrower may from time to time elect to convert such Revolving
Borrowing to a different Type or to continue such Revolving Borrowing and, in the case of a
Eurodollar Borrowing, may elect Interest Periods therefor, all as provided in this Section
2.07. The Borrower may elect different options with respect to different portions of the
affected Revolving Borrowing, in which case each such portion shall be allocated ratably among the
Lenders holding the Revolving Loans comprising such Revolving Borrowing, and the Revolving Loans
comprising each such portion shall be considered a separate Revolving Borrowing. This Section
shall not apply to Swingline Borrowings, which may not be converted except to the extent provided
in Section 2.05.

          (b) To make an election pursuant to this Section 2.07, the Borrower shall notify the
Administrative Agent of such election by telephone, telecopy or electronic mail by the time that a
Borrowing Request would be required under Section 2.03 if the Borrower was requesting a
Revolving Borrowing of the Type resulting from such election to be made on the effective date of
such election. Each such Interest Election Request shall be irrevocable and
shall be confirmed promptly by hand delivery, telecopy or electronic mail to the
Administrative Agent of a written Interest Election Request substantially in the form of
Exhibit B-2 or otherwise in a form approved by the Administrative Agent and signed by a
Responsible Officer of the General Partner on behalf of the Borrower.

          (c) Each telephonic and written Interest Election Request shall specify the following
information in compliance with Section 2.02:

     (i) the Revolving Borrowing to which such Interest Election Request applies and, if
different options are being elected with respect to different portions thereof, the portions
thereof to be allocated to each resulting Revolving Borrowing (in which case the information
to be specified pursuant to Section 2.07(c)(iii) and Section 2.07(c)(iv)
below shall be specified for each resulting Revolving Borrowing);

     (ii) the effective date of the election made pursuant to such Interest Election
Request, which shall be a Business Day;

     (iii) whether the resulting Revolving Borrowing is to be an ABR Revolving Borrowing or
a Eurodollar Borrowing; and

     (iv) if the resulting Revolving Borrowing is a Eurodollar Borrowing, the Interest
Period to be applicable thereto after giving effect to such election, which shall be a
period contemplated by the definition of the term “Interest Period.”

If no election as to the Type of Revolving Borrowing is specified, then the Borrower shall be
deemed to have selected an ABR Revolving Borrowing. If any such Interest Election Request requests
a Eurodollar Borrowing but does not specify an Interest Period, then the Borrower shall be deemed
to have selected an Interest Period of one month’s duration.

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          (d) Promptly following receipt of an Interest Election Request, the Administrative Agent shall
advise each Lender of the details thereof.

          (e) If the Borrower fails to deliver a timely Interest Election Request (or delivers an
Interest Election Request that is inconsistent with a telephonic election) with respect to a
Eurodollar Borrowing prior to the end of the Interest Period applicable thereto, then, unless such
Revolving Borrowing is repaid as provided herein, at the end of such Interest Period such Revolving
Borrowing shall be converted to an ABR Revolving Borrowing. Notwithstanding any contrary provision
hereof, if an Event of Default has occurred and is continuing and the Administrative Agent, at the
request of the Required Lenders, so notifies the Borrower, then, so long as such Event of Default
is continuing (i) no outstanding Revolving Borrowing may be converted to or continued as a
Eurodollar Borrowing and (ii) unless the Lender Indebtedness has been accelerated pursuant to
Section 8.01, each Eurodollar Borrowing shall be converted to an ABR Revolving Borrowing at
the end of the Interest Period applicable thereto.

     Section 2.08 Voluntary Termination, Reduction and Increase of Commitments; Extension of
Maturity Date.

          (a) Unless previously terminated, the Commitments shall terminate on the Maturity Date.

          (b) The Borrower may at any time terminate, or from time to time reduce, without premium or
penalty, the Commitments; provided, that, (i) each reduction of the Commitments
shall be in an amount that is an integral multiple of $500,000 and not less than $1,000,000, and
(ii) the Borrower shall not terminate or reduce the Commitments if, after giving effect to any
concurrent prepayment of the Loans in accordance with Section 2.10, the Aggregate Credit
Exposure would exceed the Total Commitment.

          (c) The Borrower shall notify the Administrative Agent of any election to terminate or reduce
the Commitments under Section 2.08(b) at least three Business Days prior to the effective
date of such termination or reduction, specifying such election and the effective date thereof.
Promptly following receipt of such notice, the Administrative Agent shall advise the Lenders of the
contents thereof. Each notice delivered by a Responsible Officer of the General Partner pursuant
to this Section 2.08(c) shall be irrevocable; provided, that, a notice of
termination of the Commitments delivered by a Responsible Officer of the General Partner may state
that such notice is conditioned upon the effectiveness of other credit facilities or the
consummation of an equity offering, in which case such notice may be revoked by the Borrower (by
notice to the Administrative Agent from a Responsible Officer of the General Partner on behalf of
the Borrower prior to the specified effective date) if such condition is not satisfied. Except as
provided in the immediately preceding sentence, any termination or reduction of the Commitments
shall be permanent and may not be reinstated except pursuant to, and in accordance with,
Section 2.08(d). Each reduction of the Commitments shall be made ratably among the Lenders
in accordance with their respective Commitments.

     (d) (i) Subject to the conditions set forth in Section 2.08(d)(ii), the
Borrower may from time to time and at any time increase the aggregate Commitments then in
effect with the prior written consent of the Administrative Agent (such consent

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not to be
unreasonably withheld, conditioned or delayed) by increasing the Commitment of a Lender or
by causing a Person consented to by the Administrative Agent (such consent not to be
unreasonably withheld, conditioned or delayed) that at such time is not a Lender or an
Affiliate of a Lender to become a Lender (an “Additional Lender”).

     (ii) Any increase in the aggregate Commitments shall be subject to the following
additional conditions:

     (A) such increase shall not be less than $5,000,000 unless the Administrative
Agent otherwise consents, such consent not to be unreasonably withheld, conditioned
or delayed, and no such increase shall be permitted if after giving effect thereto
(1) the aggregate amount of all such increases exceeds $100,000,000 more than the
initial Total Commitment on the Effective Date, or (2) the Total Commitment exceeds
$250,000,000;

     (B) no Event of Default shall have occurred and be continuing at the effective
date of such increase;

     (C) on the effective date of such increase, if any Eurodollar Borrowings are
outstanding, then the effective date of such increase shall be the last day of the
Interest Period in respect of such Eurodollar Borrowings unless the Borrower pays
compensation required by Section 2.16;

     (D) no Lender’s Commitment may be increased without the consent of such Lender;

     (E) if the Borrower elects to increase the aggregate Commitments by increasing
the Commitment of a Lender, the Borrower and such Lender shall execute and deliver
to the Administrative Agent a certificate substantially in the form of Exhibit
E (a “Commitment Increase Certificate”);

     (F) if the Borrower elects to increase the aggregate Commitments by causing an
Additional Lender to become a party to this Agreement, then the Borrower and such
Additional Lender shall execute and deliver to the Administrative Agent a
certificate substantially in the form of Exhibit F (an “Additional
Lender Certificate”), together with an Administrative Questionnaire and a
processing and recordation fee of $3,500 (to the extent not waived by the
Administrative Agent in its sole discretion), and the Borrower shall deliver a Note
payable to the order of such Additional Lender in a principal amount equal to its
Commitment, and otherwise duly completed and executed;

     (G) the Borrower may not increase the aggregate Commitments pursuant to this
Section 2.08(d) more than three (3) times during the term of this Agreement;
and

     (H) the Borrower shall have paid all fees required to be paid pursuant to any
separate letter agreement or otherwise in connection with such increase in the
Commitments, which fees shall be determined by the

50

 

Administrative Agent in
consultation and agreement with the Borrower based on the then prevailing market
rate for similar increases of comparable credit facilities.

     (iii) Subject to acceptance and recording thereof pursuant to Section
2.08(d)(iv), from and after the effective date specified in the Commitment Increase
Certificate or the Additional Lender Certificate (or if any Eurodollar Borrowings are
outstanding, then the last day of the Interest Period in respect of such Eurodollar
Borrowings, unless the Borrower has paid compensation required by Section 2.16):
(A) the amount of the aggregate Commitments shall be increased as set forth therein, and (B)
in the case of an Additional Lender Certificate, any Additional Lender party thereto shall
become a party to this Agreement and have the rights and obligations of a Lender under
this Agreement and the other Loan Documents. In addition, the Lender or the Additional
Lender, as applicable, and each of the other Lenders, shall take any such further action
necessary such that each Lender (including any Additional Lender, if applicable) shall hold
its Applicable Percentage of the outstanding Revolving Loans (and participation interests in
the Letters of Credit and Swingline Loans) after giving effect to the increase in the
aggregate Commitments.

     (iv) Upon its receipt of (A) a duly completed Commitment Increase Certificate or an
Additional Lender Certificate, executed by the Borrower and the Lender or the Borrower and
the Additional Lender party thereto, as applicable, (B) the processing and recordation fee
referred to in Section 2.08(d)(ii)(F) (to the extent not waived by the
Administrative Agent in its sole discretion), (C) the Administrative Questionnaire referred
to in Section 2.08(d)(ii)(F), if applicable, and (D) the written consent of the
Administrative Agent to such increase required by Section 2.08(d)(i), the
Administrative Agent shall accept such Commitment Increase Certificate or Additional Lender
Certificate and record the information contained therein in the Register required to be
maintained by the Administrative Agent pursuant to Section 10.04(c).

          (e) The Borrower may, by notice to the Administrative Agent (which shall promptly deliver a
copy to each of the Lenders) given not less than 90 days and not more than 120 days, prior to the
Maturity Date at any time in effect, and, subject to the proviso below, on not more than two
occasions, request that the Lenders extend the Maturity Date for an additional period of not more
than one year as specified in such notice; provided, that, the Borrower may, in lieu of the
foregoing and not in addition thereto, by notice to the Administrative Agent in accordance with the
foregoing provisions of this clause (e), on not more than one occasion, request that the
Lenders extend the Maturity Date for an additional period of not more than two years as specified
in such notice. Each Lender shall, by notice to the Borrower and the Administrative Agent given
not later than fifteen (15) days following receipt of the Borrower’s request, advise the Borrower
and the Administrative Agent whether or not it agrees to such extension. The Administrative Agent
shall promptly notify the Borrower and the Lenders of the Lenders’ responses. Any Lender that has
not so advised the Borrower and the Administrative Agent by such day shall be deemed to have
declined to agree to such extension. If the Borrower shall have requested, and if each Lender
shall have agreed to, an extension of the Maturity Date, then the Maturity Date shall be extended
for the additional period specified in the Borrower’s request in accordance with the terms above,
and the Administrative Agent shall promptly notify

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the Borrower and the Lenders of the extension of
the Maturity Date, whereupon the Maturity Date shall be extended, effective as of the Maturity Date
in effect immediately prior to such extension, without the necessity for any further action;
provided that, the Borrower shall (i) execute and deliver, or cause to be executed and
delivered, any and all documents which may be reasonably required by the Administrative Agent in
connection with such extension to evidence such extension and new Maturity Date, and (ii) pay to
the Administrative Agent, for the account of each Lender, an extension fee in such amount as shall
be agreed upon by the Borrower and the Administrative Agent based on the then prevailing market
rate for similar extensions of comparable credit facilities. THE DECISION TO AGREE OR WITHHOLD
AGREEMENT TO ANY EXTENSION OF THE MATURITY DATE HEREUNDER SHALL BE AT THE SOLE DISCRETION OF EACH
LENDER. Notwithstanding the foregoing provisions of this paragraph, (A) the Maturity Date may not
be extended to a date later than August 10, 2014
pursuant to this clause (e), (B) the effectiveness of any such extension shall be
subject to (1) the absence of any Default or Event of Default as of the date of such extension and
request therefor, (2) the absence of any material and adverse effect on the ability of any Credit
Party to fully, completely and timely pay its obligations under this Agreement as of the date of
such extension and request therefor, (3) the accuracy, in all material respects, of the
representations and warranties of each Credit Party set forth in the Loan Documents to which it is
a party as of the date of such extension and request therefor (or, if stated to have been made
expressly as of an earlier date, the accuracy, in all material respects, as of such date), and (4)
a simultaneous extension of the “Maturity Date” (as defined in the Parent Subordinated Note) to a
date that is not less than six (6) months after the Maturity Date as extended hereby, (C) the
Borrower shall have the right, pursuant to, and subject to the terms of, Section 2.19(c),
to replace any Non-Consenting Lender that has declined to agree to any requested extension of the
Maturity Date with a Lender or other financial institution that will agree to such extension of the
Maturity Date, (D) the Borrower shall have the right, at any time prior to the Maturity Date then
in effect, to withdraw its request for an extension under this clause (e) by notice to the
Administrative Agent (which shall promptly deliver a notice to each Lender), in which case the
Maturity Date will not be so extended, and (E) the Borrower shall have the right, at any time prior
to the Maturity Date then in effect, to withdraw its request for an extension of the Maturity Date
for an additional period of two (2) years and, in lieu thereof, request an extension of the
Maturity Date for an additional period of one year, by providing notice to the Administrative Agent
(which shall promptly deliver a notice to each Lender), in which case (1) the Maturity Date will be
extended for one year in the event the Lenders have previously agreed to a two year extension
pursuant to the Borrower’s request and in accordance with this Section 2.08(e), or (2) in
the event any Lender has not previously agreed to a two year extension pursuant to the Borrower’s
request and in accordance with this Section 2.08(e), any such Lender shall, by notice to
the Borrower and the Administrative Agent given not later than fifteen (15) days following receipt
of the Borrower’s request pursuant to this clause (e), advise the Borrower and the
Administrative Agent whether or not it agrees to such one year extension (and the Administrative
Agent shall promptly notify the Borrower and the Lenders of the Lenders’ responses), and any Lender
that has not so advised the Borrower and the Administrative Agent by such day shall be deemed to
have declined to agree to such one year extension; provided that, and notwithstanding
anything to the contrary contained herein, the Borrower shall not have the right provided in this
clause (e) in the event that its original request for an extension of two years was not
approved by the Lenders pursuant to the terms of this Section 2.08(e) and the Borrower’s
alternative request pursuant to this clause (e) 

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is made (or would be made) by notice to the
Administrative Agent given less than 45 days prior to the Maturity Date

     Section 2.09 Repayment of Loans; Evidence of Debt.

          (a) Any Lender may request that Loans made by it be evidenced by the Borrower’s issuance,
execution and delivery of a Note payable to the order of each such Lender in the amount of such
Lender’s Commitment. If any Lender’s Commitment increases or decreases for any reason (whether
pursuant to Section 2.08, Section 2.10, Section 10.04(b) or otherwise), the
Borrower shall, at the request of any such Lender, deliver on the effective date of such increase
or decrease a new Note payable to the order of such Lender in a principal amount equal to its
Commitment after giving effect to such increase or decrease, and otherwise duly completed and
executed. Upon delivery of such new or replacement Note, each applicable
Lender shall promptly return to the Borrower all Notes previously delivered to such Lender
pursuant to this Agreement.

          (b) The Borrower hereby unconditionally promises to pay (i) to the Administrative Agent, for
the account of each Lender, the then unpaid principal amount of each Revolving Loan of such Lender
on the Maturity Date, and (ii) to the Swingline Lender the then unpaid principal amount of each
Swingline Loan on the dates provided in, and in accordance with, Section 2.05(d). The
Borrower hereby further agrees to pay interest on the unpaid principal amount of the Loans from
time to time outstanding from the date hereof until payment in full thereof at the rates per annum,
and on the dates, set forth in Section 2.12.

          (c) Each Lender shall maintain in accordance with its usual practice an account or accounts
evidencing the Lender Indebtedness of the Borrower to such Lender resulting from each Loan made by
such Lender, including the amounts of principal and interest payable and paid to such Lender from
time to time hereunder.

          (d) The Administrative Agent shall maintain accounts in which it shall record (i) the amount
of each Loan made hereunder, the Class and Type thereof and the Interest Period, if any, applicable
thereto, (ii) the amount of any principal or interest due and payable or to become due and payable
from the Borrower to each Lender hereunder and (iii) the amount of any sum received by the
Administrative Agent hereunder for the account of the Lenders and each Lender’s share thereof.

          (e) The entries made in the accounts maintained pursuant to Section 2.09(c) or
Section 2.09(d) shall be prima facie evidence of the existence and amounts of the
obligations recorded therein; provided, that, the failure of any Lender or the
Administrative Agent to maintain such accounts or any error therein shall not in any manner affect
the obligation of the Borrower to repay the Loans in accordance with the terms of this Agreement.

     Section 2.10 Prepayment of Loans; Commitment Reductions.

          (a) The Borrower shall have the right at any time and from time to time to prepay any
Borrowing in whole or in part, without premium or penalty except as expressly provided in this
Agreement, subject to prior notice in accordance with Section 2.10(b).

53

 

          (b) The Borrower shall notify the Administrative Agent (and, in the case of prepayment of a
Swingline Loan, the Swingline Lender) by telephone, telecopy or electronic mail (confirmed, in the
case of original notice by telephone, by telecopy or electronic mail) of any prepayment hereunder
(i) in the case of prepayment of a Eurodollar Borrowing, not later than 12:00 noon, Dallas, Texas
time, three (3) Business Days before the date of prepayment, (ii) in the case of prepayment of an
ABR Revolving Borrowing, not later than 12:00 noon, Dallas, Texas time, one (1) Business Day before
the date of prepayment, and (iii) in the case of prepayment of a Swingline Borrowing, not later
than 12:00 noon, Dallas, Texas time, on the date of prepayment. Each such notice shall be
irrevocable and shall specify the prepayment date and the principal amount of each Borrowing or
portion thereof to be prepaid; provided, that, if a notice of prepayment is given
in connection with a conditional notice of termination of the Commitments as contemplated by
Section 2.08(c), then such notice of prepayment may be
revoked if such notice of termination is revoked in accordance with Section 2.08(c).
Promptly following receipt of any such notice relating to a Borrowing, the Administrative Agent
shall advise the Lenders of the contents thereof. Each partial prepayment of ABR Revolving
Borrowings shall be in the minimum principal amount of $500,000 and in integral multiples of
$100,000, each partial prepayment of Eurodollar Borrowings shall be in the minimum principal amount
of $1,000,000 and in integral multiples of $500,000 (provided, that, such amounts
shall not apply to the payments required by the other clauses of this Section 2.10) (and,
if any Eurodollar Borrowing is prepaid other than at the end of the Interest Period applicable
thereto, such prepayment shall include any amounts payable pursuant to Section 2.16), and
Swingline Loans may be prepaid in any amount. Each prepayment of a Borrowing shall be applied
ratably to the Loans included in the prepaid Borrowing. Prepayments shall be accompanied by
accrued interest to the extent required by Section 2.12 and by any other amounts then due
under this Agreement (including all amounts due under Section 2.16).

          (c) If at any time after the Closing Date any Credit Party shall receive Net Cash Proceeds
from any Material Asset Disposition (including, without limitation, pursuant to any Casualty
Event), but without waiving the requirement of the Required Lenders’ consent to any such
disposition in violation of any Loan Document, then, (i) unless a Reinvestment Notice shall have
been delivered by the Borrower to the Administrative Agent in respect thereof on or before the date
of such Credit Party’s receipt of such Net Cash Proceeds, the Commitments shall be reduced on the
next Business Day following the date of receipt of such Net Cash Proceeds by an amount equal to
100% of such Net Cash Proceeds and (ii) if a Reinvestment Notice shall have been delivered by the
Borrower to the Administrative Agent in respect thereof prior to the date of receipt of such Net
Cash Proceeds, the Commitments shall, on or before the first Business Day following the end of the
Reinvestment Period applicable thereto, be reduced by an amount equal to the Reinvestment
Prepayment Amount with respect to such Material Asset Disposition; provided, that,
notwithstanding the foregoing, if an Event of Default has occurred and is continuing at the time of
any Material Asset Disposition, the Commitments shall be reduced on the next Business Day following
the date of such Credit Party’s receipt of such Net Cash proceeds by an amount equal to 100% of
such Net Cash Proceeds.

          (d) If at any time after the Closing Date any Credit Party shall receive Net Cash Proceeds
from any Debt Offering (but without waiving the requirement of the Required Lenders’ consent to any
such offering in violation of any Loan Document), the Commitments

54

 

shall be reduced on the next
Business Day following the date of such Credit Party’s receipt of such Net Cash Proceeds by an
amount equal to 100% of such Net Cash Proceeds.

          (e) If, after giving effect to any reduction or termination of the Commitments, the aggregate
principal amount of all Loans then outstanding is in excess of the Total Commitment, the Borrower
shall make a prepayment of Loans in an amount equal to such excess, together with any related costs
required to be paid in accordance herewith (including funding losses, if any, resulting from such
prepayment being made other than on the last day of an Interest Period with respect to any
Eurodollar Loan as provided in Section 2.16). Any such prepayment shall be payable in full
one Business Day following the date on which the reduction or termination of the Commitments
pursuant to Section 2.08 or Section 2.10 becomes effective.

          (f) Each prepayment under this Section 2.10 shall be applied first to ABR Loans and
then to Eurodollar Loans next maturing.

     Section 2.11 Fees.

          (a) The Borrower agrees to pay to the Administrative Agent, for the account of each Lender, a
commitment fee which shall accrue at the Applicable Rate on such Lender’s percentage of the average
daily amount of the unused portion of the Total Commitment during the period from and including the
Closing Date to but excluding the date on which such Lender’s Commitment terminates. Accrued
commitment fees shall be payable in arrears on each Payment Date, commencing on the first Payment
Date to occur after the Closing Date and on the date on which the Commitments terminate. All
commitment fees shall be computed on the basis of a year of 360 days and shall be payable for the
actual number of days elapsed (including the first day but excluding the last day).

          (b) The Borrower agrees to pay to (i) the Administrative Agent and BAS, in each case for its
own account and, if applicable, for the account of the Lenders, fees payable in the amounts and at
the times separately agreed upon between or among the Borrower, BAS and the Administrative Agent,
including, without limitation, pursuant to the BofA Fee Letter, and, if and when applicable, an
extension fee as provided in Section 2.08(e), and (ii) BNP Paribas and BNPPSC, in each case
for its own account, fees payable in the amounts and at the times separately agreed upon between or
among the Borrower, BNP Paribas and BNPPSC, including, without limitation, pursuant to the BNP Fee
Letter.

          (c) Except as otherwise provided herein or in the Fee Letters, all fees payable hereunder
shall be paid on the dates due, in immediately available funds, to the Administrative Agent (or to
L/C Issuer, in the case of fees payable to it) for its own account, or for distribution, as
applicable, to the Lenders. Fees paid shall not be refundable under any circumstances absent
manifest error (e.g., as a result of a clerical mistake).

          (d) The Borrower agrees to pay to the Administrative Agent or L/C Issuer, as applicable, the
fees set forth and described in Section 2.06(i) and Section 2.06(j). All
participation and fronting fees shall be computed on the basis of a year of 360 days and shall be
payable for the actual number of days elapsed (including the first day but excluding the last day).

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     Section 2.12 Interest.

          (a) Subject to Section 10.13, the Loans comprising each ABR Revolving Borrowing shall
bear interest for each day that such Loans are outstanding at the Alternate Base Rate plus the
Applicable Rate for ABR Loans for such day.

          (b) Subject to Section 10.13, the Loans comprising each Eurodollar Borrowing shall
bear interest for each day that such Loans are outstanding at the Adjusted Eurodollar Rate for the
Interest Period in effect for such Borrowing plus the Applicable Rate for Eurodollar Loans for such
day.

          (c) Subject to Section 10.13, the Loans comprising each Swingline Borrowing shall bear
interest for each day that such Loans are outstanding at (i) the Alternate Base Rate plus
the Applicable Rate for ABR Loans for such day, or (ii) the Specified Rate plus the Applicable
Rate for Specified Rate Swingline Loans for such day, as elected by the Borrower pursuant to
Section 2.05(b).

          (d) Notwithstanding the foregoing, but subject to Section 10.13, if any principal of
or interest on any Loan or any fee or other amount payable by the Borrower hereunder is not paid
when due, whether at stated maturity, upon acceleration or otherwise, such overdue amount shall
until paid or waived in writing bear interest, after as well as before judgment, at a rate per
annum equal to (i) in the case of overdue principal of any Loan, the lesser of (A) 2% plus the
rate otherwise applicable to such Loan as provided in the preceding paragraphs of this Section
2.12 or (B) the Highest Lawful Rate or (ii) in the case of any other amount, the lesser of (A)
2% plus the rate applicable to ABR Revolving Loans as provided in Section 2.12(a) or (B)
the Highest Lawful Rate.

          (e) Subject to Section 10.13, accrued interest on each Loan shall be payable in
arrears on each Interest Payment Date for such Loan and upon termination of the Commitments;
provided, that, (i) interest accrued pursuant to Section 2.12(d) shall be
payable on demand of the Administrative Agent or the Required Lenders, (ii) in the event of any
repayment or prepayment of any Loan (whether due to acceleration or otherwise), accrued interest on
the principal amount repaid or prepaid shall be payable on the date of such repayment or prepayment
and (iii) in the event of any conversion of any Eurodollar Loan prior to the end of the current
Interest Period therefor, accrued interest on such Loan shall be payable on the effective date of
such conversion.

          (f) Subject to Section 10.13, all interest hereunder shall be computed on the basis of
a year of 360 days, except that interest computed by reference to the Alternate Base Rate shall be
computed on the basis of a year of 365 days (or 366 days in a leap year), and in each case shall be
payable for the actual number of days elapsed (including the first day but excluding the last day).
Promptly after the determination of any interest rate provided for herein or any change therein,
the Administrative Agent shall notify the Lenders to which such interest is payable and the
Borrower thereof. Each determination by the Administrative Agent of an interest rate or fee
hereunder shall, except in cases of manifest error, be final, conclusive and binding on the
parties.

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     Section 2.13 Alternate Rate of Interest. If prior to the commencement of any Interest
Period for a Eurodollar Borrowing:

          (a) the Administrative Agent determines (which determination shall be conclusive absent
manifest error) that adequate and reasonable means do not exist for ascertaining the Adjusted
Eurodollar Rate or Eurodollar Rate, as applicable, for such Interest Period;

          (b) the Administrative Agent is advised by the Required Lenders that the Adjusted Eurodollar
Rate for such Interest Period will not adequately and fairly reflect the cost to such Lenders of
making or maintaining their Loans included in such Borrowing for such Interest Period; or

          (c) the Administrative Agent determines in good faith (which determination shall be
conclusive) that by reason of circumstances affecting the interbank dollar market generally,
deposits in dollars in the London interbank dollar market are not being offered for the applicable
Interest Period and in an amount equal to the amount of the Eurodollar Loan requested by the
Borrower;

then the Administrative Agent shall give notice thereof to the Borrower and the Lenders by
telephone or telecopy as promptly as practicable thereafter and, until the Administrative Agent
notifies the Borrower and the Lenders that the circumstances giving rise to such notice no longer
exist, which notice the Administrative Agent shall give promptly after becoming aware thereof, (i)
any Interest Election Request that requests the conversion of any Borrowing to, or continuation of
any Borrowing as, a Eurodollar Borrowing for the affected Interest Period shall be ineffective and
(ii) if any Borrowing Request requests a Eurodollar Borrowing, such Borrowing shall be made as a
Eurodollar Loan having the shortest Interest Period which is not unavailable under clauses
(a) through (c) of this Section, and if no Interest Period is available, as an ABR
Revolving Borrowing.

     Section 2.14 Illegality.

          (a) Notwithstanding any other provision of this Agreement to the contrary, if (i) by reason of
the adoption of any applicable Governmental Rule or any change in any applicable Governmental Rule
or in the interpretation or administration thereof by any Governmental Authority or compliance by
any Lender with any request or directive (whether or not having the force of law) of any central
bank or other Governmental Authority or (ii) circumstances affecting the London interbank dollar
market or the position of a Lender therein shall at any time make it unlawful in the sole
discretion of a Lender exercised in good faith for such Lender or its Applicable Lending Office to
(A) honor its obligation to make Eurodollar Loans either generally or for a particular Interest
Period provided for hereunder, or (B) maintain Eurodollar Loans either generally or for a
particular Interest Period provided for hereunder, then such Lender shall promptly notify the
Borrower thereof in writing through the Administrative Agent (who will endeavor to, but not be
liable for failing to, provide the Borrower with the basis therefor in reasonable detail) and such
Lender’s obligation to make or maintain Eurodollar Loans having an affected Interest Period
hereunder shall be suspended until such time as such Lender may again make and maintain Eurodollar
Loans having an affected Interest Period (in which case

57

 

the provisions of Section 2.14(b)
hereof shall be applicable). Before giving such notice pursuant to this Section 2.14, such
Lender will designate a different available Applicable Lending Office for the affected Eurodollar
Loans of such Lender or take such other action as the Borrower may request if such designation or
action will avoid the need to suspend such Lender’s obligation to make Eurodollar Loans hereunder
and will not, in the sole opinion of such Lender exercised in good faith, be disadvantageous to
such Lender (provided, that such Lender shall have no obligation so to designate an Applicable
Lending Office for Eurodollar Loans located in the United States of America).

          (b) If the obligation of any Lender to make or maintain any Eurodollar Loans shall be
suspended pursuant to Section 2.14(a) hereof, all Loans having an affected Interest Period
which would otherwise be made by such Lender as Eurodollar Loans shall be made instead as ABR
Revolving Loans (and, if such Lender so requests by written notice to the
Borrower with a copy to the Administrative Agent, each Eurodollar Loan having an affected
Interest Period of such Lender then outstanding shall be automatically converted into an ABR
Revolving Loan on the last day of the Interest Period for such Eurodollar Loans unless earlier
conversion is required by applicable law) and, to the extent that Eurodollar Loans are so made as
(or converted into) ABR Revolving Loans, all payments of principal which would otherwise be applied
to such Eurodollar Loans shall be applied instead to such ABR Revolving Loans.

     Section 2.15 Increased Costs.

          (a) If any Change in Law shall:

          (i) impose, modify or deem applicable any reserve, special deposit or similar
requirement against assets of, deposits with or for the account of, or credit extended by,
any Lender (except any such reserve requirement reflected in the Adjusted Eurodollar Rate)
or L/C Issuer (whether or not pursuant to Regulation D of the Board); or

          (ii) impose on any Lender, L/C Issuer or the London interbank market any other
condition affecting this Agreement or Eurodollar Loans made by such Lender (except any such
reserve requirements reflected in the Adjusted Eurodollar Rate) or any Letter of Credit or
participation therein;

and the result of any of the foregoing shall be to increase the cost to such Lender of making or
maintaining any Eurodollar Loan (or of maintaining its obligation to make any such Loan) or to
increase the cost to such Lender or L/C Issuer of participating in, issuing or maintaining any
Letter of Credit or to reduce the amount of any sum received or receivable by such Lender or L/C
Issuer hereunder (whether of principal, interest or otherwise) with respect to any Eurodollar Loan
or Letter of Credit, then the Borrower will pay, in accordance with Section 2.15(c), to
such Lender or L/C Issuer, as the case may be, such additional amount or amounts as will compensate
such Lender or L/C Issuer, as the case may be, for such additional costs incurred or reduction
suffered with respect to any Eurodollar Loan or Letter of Credit.

          (b) If any Lender or L/C Issuer determines in good faith that any Change in Law regarding
capital requirements has or would have the effect of reducing the rate of return on such Lender’s
or L/C Issuer’s capital or on the capital of such Lender’s or L/C Issuer’s holding

58

 

company, if any,
as a consequence of this Agreement or the Loans made by, or the participation in Letters of Credit
held by, such Lender, or the Letters of Credit issued by L/C Issuer, to a level below that which
such Lender or L/C Issuer or such Lender’s or L/C Issuer’s holding company could have achieved but
for such Change in Law (taking into consideration such Lender’s or L/C Issuer’s policies and the
policies of such Lender’s or L/C Issuer’s holding company with respect to capital adequacy), then
from time to time the Borrower will pay, in accordance with Section 2.15(c), to such Lender
or such L/C Issuer, as the case may be, such additional amount or amounts as will compensate such
Lender or L/C Issuer or such Lender’s or L/C Issuer’s holding company for any such reduction
suffered.

          (c) A certificate of a Lender or L/C Issuer setting forth the amount or amounts necessary to
compensate such Lender or L/C Issuer or such Lender’s or L/C Issuer’s holding company, as the case
may be, as specified in Section 2.15(a) or Section 2.15(b), shall be
delivered to the Borrower and shall be conclusive absent manifest error. Except as provided
in Section 2.15(d), the Borrower shall pay such Lender or L/C Issuer, as the case may be,
the amount shown as due on any such certificate within ten (10) Business Days after receipt
thereof.

          (d) Failure or delay on the part of any Lender or L/C Issuer to demand compensation pursuant
to this Section 2.15 shall not constitute a waiver of such Lender’s or L/C Issuer’s right
to demand such compensation; provided, that, the Borrower shall not be required to
compensate a Lender or L/C Issuer pursuant to this Section 2.15 for any increased costs or
reductions incurred more than 180 days prior to the date that such Lender or L/C Issuer, as the
case may be, notifies the Borrower of the Change in Law giving rise to such increased costs or
reductions and of such Lender’s or L/C Issuer’s intention to claim compensation therefor;
provided further that, if the Change in Law giving rise to such increased
costs or reductions is retroactive, then the 180-day period referred to above shall be extended to
include the period of retroactive effect thereof.

          Section 2.16 Break Funding Payments. In the event of:

          (a) the payment (including prepayment) of any principal of any Eurodollar Loan other than on
the last day of an Interest Period applicable thereto (including as a result of an Event of
Default);

          (b) the conversion of any Eurodollar Loan other than on the last day of the Interest Period
applicable thereto;

          (c) the failure to borrow, convert, continue or prepay any Loan on the date specified in any
notice delivered pursuant hereto (regardless of whether such notice may be revoked under
Section 2.10 and is revoked in accordance therewith); or

          (d) the assignment of any Eurodollar Loan other than on the last day of the Interest Period
applicable thereto as a result of a request by the Borrower pursuant to Section 2.08(d) or
Section 2.19;

then, in any such event, the Borrower shall compensate each Lender for the loss, cost and expense
attributable to such event. In the case of a Eurodollar Loan, such loss, cost or expense to any
Lender shall be deemed to include an amount determined by such Lender to be the excess,

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if any, of
(i) the amount of interest which would have accrued on the principal amount of such Loan had such
event not occurred, at the Adjusted Eurodollar Rate that would have been applicable to such Loan,
for the period from the date of such event to the last day of the then current Interest Period
therefor (or, in the case of a failure to borrow, convert or continue, for the period that would
have been the Interest Period for such Loan), over (ii) the amount of interest which would accrue
on such principal amount for such period at the interest rate which such Lender would bid were it
to bid, at the commencement of such period, for dollar deposits of a comparable amount and period
from other banks in the London interbank market. A certificate of any Lender setting forth any
amount or amounts that such Lender is entitled to receive pursuant to this Section 2.16
shall be delivered to the Borrower and the Administrative Agent and shall be conclusive absent
manifest error. Except as provided in the last sentence of this Section 2.16, the Borrower
shall pay such Lender the amount shown as due on any such
certificate within ten (10) Business Days after receipt thereof. Failure or delay on the part of
any Lender or L/C Issuer to demand compensation pursuant to this Section shall not constitute a
waiver of such Lender’s or L/C Issuer’s right to demand such compensation; provided that
the Borrower shall not be required to compensate a Lender or L/C Issuer pursuant to this Section
for any such loss, cost or expense described in this Section 2.16 incurred more than 180
days prior to the date that such Lender or L/C Issuer, as the case may be, notifies the Borrower of
the circumstance giving rise to such loss, cost or expense described in this Section 2.16
and of such Lender’s or L/C Issuer’s intention to claim compensation therefor.

     Section 2.17 Taxes.

          (a) Any and all payments by or on account of any obligation of the Borrower hereunder or under
any other Loan Document shall be made free and clear of and without deduction for any Indemnified
Taxes or Other Taxes; provided, that, if the Borrower shall be required to deduct
any Indemnified Taxes or Other Taxes from such payments, then (i) the sum payable shall be
increased as necessary so that after making all required deductions (including deductions
applicable to additional sums payable under this Section 2.17) the Administrative Agent,
each Lender or L/C Issuer (as the case may be) receives an amount equal to the sum it would have
received had no such deductions been made, (ii) the Borrower shall make such deductions and (iii)
the Borrower shall pay the full amount deducted to the relevant Governmental Authority in
accordance with applicable law; provided, that, if a Lender has breached or is in
breach of its obligations under Section 2.17(e), then the Borrower shall have no
obligations under clause (i) of this Section 2.17(a) with respect to payments made
or to be made to such Lender where Indemnified Taxes and/or Other Taxes arise in respect of such
payments as a consequence of such Lender’s status as a Foreign Lender.

          (b) In addition, the Borrower shall pay any Other Taxes to the relevant Governmental Authority
in accordance with applicable law.

          (c) THE BORROWER SHALL INDEMNIFY THE ADMINISTRATIVE AGENT, EACH LENDER AND L/C ISSUER, WITHIN
TEN (10) BUSINESS DAYS AFTER WRITTEN DEMAND THEREFOR, FOR THE FULL AMOUNT OF ANY INDEMNIFIED TAXES
OR OTHER TAXES PAID BY THE ADMINISTRATIVE AGENT, SUCH LENDER OR L/C ISSUER, AS THE CASE MAY BE, ON
OR WITH RESPECT TO ANY PAYMENT BY OR ON ACCOUNT OF ANY OBLIGATION OF THE BORROWER HEREUNDER OR

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UNDER ANY OTHER LOAN DOCUMENT (INCLUDING INDEMNIFIED TAXES OR OTHER TAXES IMPOSED OR ASSERTED ON OR
ATTRIBUTABLE TO AMOUNTS PAYABLE UNDER THIS SECTION 2.17) AND ANY PENALTIES, INTEREST AND
REASONABLE EXPENSES ARISING THEREFROM OR WITH RESPECT THERETO, WHETHER OR NOT SUCH INDEMNIFIED
TAXES OR OTHER TAXES WERE CORRECTLY OR LEGALLY IMPOSED OR ASSERTED BY THE RELEVANT GOVERNMENTAL
AUTHORITY; PROVIDED, THAT, IF SUCH PAYMENTS OR LIABILITIES ARISE FROM THE LENDER
HAVING BREACHED OR BEING IN BREACH OF ITS OBLIGATIONS UNDER SECTION 2.17(e), THEN THE
BORROWER SHALL HAVE NO OBLIGATIONS UNDER THIS SECTION 2.17(c) WITH RESPECT TO SUCH PAYMENTS
OR LIABILITIES. A CERTIFICATE AS TO THE AMOUNT OF SUCH PAYMENT OR LIABILITY DELIVERED TO THE
BORROWER BY A LENDER OR L/C
ISSUER OR BY THE ADMINISTRATIVE AGENT ON ITS OWN BEHALF OR ON BEHALF OF A LENDER OR L/C
ISSUER, SHALL BE CONCLUSIVE ABSENT MANIFEST ERROR.

          (d) As soon as practicable after any payment of Indemnified Taxes or Other Taxes by the
Borrower to a Governmental Authority, if available, the Borrower shall deliver to the
Administrative Agent the original or a certified copy of a receipt issued by such Governmental
Authority evidencing such payment, a copy of the return reporting such payment or other evidence of
such payment reasonably satisfactory to the Administrative Agent.

          (e) Each Lender that is not organized under the laws of the United States of America or a
state thereof agrees that such Lender will deliver to the Borrower and the Administrative Agent two
(2) duly completed copies of United States Internal Revenue Service Form W-8 BEN or W-8 ECI or
successor forms (or if such forms are no longer required, a representation by such Lender)
certifying in either case that such Lender is entitled to receive payments from the Credit Parties
under the Loan Documents without deduction or withholding of any United States federal income
taxes. Each Lender which so delivers a Form W-8 BEN or W-8 ECI further undertakes to deliver to
the Borrower and the Administrative Agent two (2) additional copies of such form (or a successor
form) on or before such form expires or becomes obsolete or after the occurrence of any event
requiring a change in the most recent form so delivered by it and such amendments thereto or
extensions or renewals thereof as may be reasonably requested by the Borrower or the Administrative
Agent, in each case, certifying that such Lender is entitled to receive payments from the Borrower
under the Loan Documents without deduction or withholding of any United States federal income
taxes, unless (i) an event (including without limitation any change in treaty, law or regulation)
has occurred prior to the date on which any such delivery would otherwise be required which renders
all such forms inapplicable or which would prevent such Lender from duly completing and delivering
any such form with respect to it and (ii) such Lender advises the Borrower and the Administrative
Agent that it is not capable of receiving such payments without any deduction or withholding of
United States federal income tax.

          (f) If the Borrower at any time pays an amount under Section 2.17(a), (b) or
(c) to any Lender, the Administrative Agent or L/C Issuer, and such payee receives a refund
of or credit for any part of any Indemnified Taxes or Other Taxes which such payee determines in
its reasonable judgment is made with respect to such amount paid by the Borrower, such Lender,

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the
Administrative Agent or L/C Issuer, as the case may be, shall pay to the Borrower the amount of
such refund or credit promptly, and in any event within 30 days, following the receipt of such
refund or credit by such payee.

          (g) If the Borrower pays any amount pursuant to Section 2.17(a) or (c) with
respect to any payment to a Lender or, with the prior written consent of such Lender, provides any
security therefor pursuant to applicable law, and the Borrower at its expense wishes to contest the
eligibility of the relevant Taxes and furnishes to such Lender an opinion of tax counsel
satisfactory to such Lender, acting reasonably, to the effect that there exists a reasonable basis
for contesting such Taxes, the Borrower may contest such Taxes, provided that:

          (i) the Borrower has otherwise complied with this Section 2.17(g);

          (ii) the Borrower has delivered to such Lender such additional security or assurances
as such Lender may require, acting reasonably, in order to be satisfied that such Lender
will not incur any liability by reason of any contestation, including legal fees,
disbursements, interest and penalties; and

          (iii) the conduct of such proceedings (including the settlement or compromise of same)
will remain within the sole discretion of such Lender and will forthwith be abandoned if
such Lender so requires, acting reasonably, having regard to its overall tax and related
interests.

     Section 2.18 Payments Generally; Pro Rata Treatment; Sharing of Set-offs.

          (a) The Borrower shall make each payment required to be made by the Borrower hereunder or
under any other Loan Document (whether of principal, interest, fees or reimbursement of
Unreimbursed Amounts, or of amounts payable under Section 2.15, Section 2.16, or
Section 2.17 or otherwise) prior to the time expressly required hereunder or under such
other Loan Documents for such payment (or, if no such time is expressly required hereunder or
thereunder, prior to 2:00 p.m., Dallas, Texas time), on the date when due, in immediately available
funds, without set-off or counterclaim. Any amounts received after such time on any date may, in
the discretion of the Administrative Agent, be deemed to have been received on the next succeeding
Business Day for purposes of calculating interest thereon. All such payments shall be made to the
Administrative Agent at its offices at 901 Main Street, Mail Code: TX1-492-14, Dallas, Texas
75202-3714, Attention: Tonya R. Parker, phone: (214) 290-2133, telecopy: (214) 290-9438, except
payments to be made directly to L/C Issuer or the Swingline Lender as expressly provided herein and
except that payments pursuant to Section 2.15, Section 2.16, Section 2.17
and/or Section 10.03 shall be made directly to the Persons entitled thereto and payments
pursuant to other Loan Documents shall be made to the Persons specified therein. The
Administrative Agent shall distribute any such payments received by it for the account of any other
Person to the appropriate recipient promptly following receipt thereof. Except as set forth in
clause (a) of the definition of “Interest Period,” if any payment under any Loan Document
shall be due on a day that is not a Business Day, the date for payment shall be extended to the
next succeeding Business Day, and, in the case of any payment accruing interest, interest thereon
shall be payable for the period of such extension. All payments under each Loan Document shall be
made in dollars.

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          (b) Subject to Section 8.02, if at any time insufficient funds are received by and
available to the Administrative Agent to pay fully all amounts of principal, Unreimbursed Amounts,
interest and fees then due hereunder, such funds shall be applied, subject to Section
10.14, (i) first, towards payment of interest and fees then due hereunder, ratably among the
parties entitled thereto in accordance with the amounts of interest and fees then due to such
parties, and (ii) second, towards payment of principal and unreimbursed L/C Obligations then due
hereunder, ratably among the parties entitled thereto in accordance with the amounts of principal
and unreimbursed L/C Obligations then due to such parties.

          (c) If any Lender shall, by exercising any right of set-off or counterclaim or otherwise,
obtain payment in respect of any principal of or interest on any of its Revolving Loans and any
participation in L/C Advances or Swingline Loans resulting in such Lender receiving
payment of a greater proportion of the aggregate amount of its Revolving Loans and
participations in L/C Advances and Swingline Loans and accrued interest thereon than the proportion
received by any other Lender, then the Lender receiving such greater proportion shall purchase (for
cash at face value) participations in the Revolving Loans and participations in L/C Advances and
Swingline Loans of other Lenders to the extent necessary so that the benefit of all such payments
shall be shared by the Lenders ratably in accordance with the aggregate amount of principal of and
accrued interest on their respective Revolving Loans and participations in L/C Advances and
Swingline Loans; provided, that, (i) if any such participations are purchased and
all or any portion of the payment giving rise thereto is recovered, such participations shall be
rescinded and the purchase price restored to the extent of such recovery, without interest, and
(ii) the provisions of this paragraph shall not be construed to apply to any payment made by the
Borrower pursuant to and in accordance with the express terms of this Agreement or any payment
obtained by a Lender as consideration for the assignment of or sale of a participation in any of
its Revolving Loans or participations in L/C Advances and Swingline Loans to any assignee or
participant, other than to any Credit Party (as to which the provisions of this paragraph shall
apply). The Borrower consents to the foregoing and agrees, to the extent it may effectively do so
under applicable law, that any Lender acquiring a participation pursuant to the foregoing
arrangements may exercise against the Borrower rights of set-off and counterclaim with respect to
such participation as fully as if such Lender were a direct creditor of the Borrower in the amount
of such participation.

          (d) Unless the Administrative Agent shall have received notice from the Borrower prior to the
date on which any payment is due to the Administrative Agent for the account of the Lenders or L/C
Issuer hereunder that the Borrower will not make such payment, the Administrative Agent may assume
that the Borrower has made such payment on such date in accordance herewith and may, in reliance
upon such assumption, distribute to the Lenders or L/C Issuer, as the case may be, the amount due.
In such event, if the Borrower has not in fact made such payment, then each of the Lenders or L/C
Issuer, as the case may be, severally agrees to repay to the Administrative Agent forthwith on
demand the amount so distributed to such Lender or L/C Issuer with interest thereon, for each day
from and including the date such amount is distributed to it to but excluding the date of payment
to the Administrative Agent, at the greater of the Federal Funds Effective Rate and a rate
determined by the Administrative Agent in accordance with banking industry rules on interbank
compensation.

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          (e) If any Lender shall fail to make any payment required to be made by it pursuant to
Section 2.04(b), Section 2.06, Section 2.18(d) or Section 10.03(c),
then the Administrative Agent may, in its discretion (notwithstanding any contrary provision
hereof), apply any amounts thereafter received by the Administrative Agent for the account of such
Lender to satisfy such Lender’s obligations under such Sections until all such unsatisfied
obligations are fully paid.

     Section 2.19 Mitigation Obligations; Replacement of Lenders.

          (a) If any Lender requests compensation under Section 2.15, or if the Borrower is
required to pay any additional amount to any Lender or any Governmental Authority for the account
of any Lender pursuant to Section 2.17, then such Lender shall use reasonable efforts to
designate a different lending office for funding or booking its Loans hereunder or to
assign its rights and obligations hereunder to another of its offices, branches or affiliates,
if, in the reasonable judgment of such Lender, such designation or assignment (i) would eliminate
or reduce amounts payable pursuant to Section 2.15 or Section 2.17, as the case may
be, in the future and (ii) would not subject such Lender to any unreimbursed cost or expense and
would not otherwise be disadvantageous to such Lender. The Borrower hereby agrees to pay all
reasonable costs and expenses incurred by any Lender in connection with any such designation or
assignment.

          (b) If (i) any Lender asserts that events have occurred suspending its obligation to make or
maintain Eurodollar Loans under Section 2.14 when substantially all other Lenders have not
also done so, (ii) any Lender requests compensation under Section 2.15, (iii) the Borrower
is required to pay any additional amount to any Lender or any Governmental Authority for the
account of any Lender pursuant to Section 2.17, or (iv) if any Lender defaults in its
obligation to fund Loans hereunder, then the Borrower may, at its sole expense and effort, upon
notice to such Lender and the Administrative Agent, require such Lender to assign and delegate,
without recourse (in accordance with and subject to the restrictions contained in Section
10.04), all its interests, rights and obligations under this Agreement to an assignee that
shall assume such obligations (which assignee may be another Lender, if a Lender accepts such
assignment); provided, that, (A) if the assignee is not a Lender or an Affiliate of
a Lender, the Borrower shall have received the prior written consent of the Administrative Agent
and L/C Issuer, which consent of the Administrative Agent and L/C Issuer shall not unreasonably be
withheld, conditioned or delayed, (B) such Lender shall have received payment of an amount equal to
the outstanding principal of its Revolving Loans and participations in L/C Advances and Swingline
Loans, accrued interest thereon, accrued fees and all other amounts payable to it hereunder, from
the assignee (to the extent of such outstanding principal and accrued interest and fees) or the
Borrower (in the case of all other amounts), (C) the assignee and assignor shall have entered into
an Assignment and Acceptance, and (D) in the case of any such assignment resulting from a claim for
compensation under Section 2.15, or payments required to be made pursuant to Section
2.17, such assignment will result in a reduction in such compensation or payments. A Lender
shall not be required to make any such assignment and delegation if, prior thereto, as a result of
a waiver by such Lender or otherwise, the circumstances entitling the Borrower to require such
assignment and delegation cease to apply.

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          (c) In addition to the foregoing provisions of Section 2.19(b), the Borrower shall be
permitted to replace any Lender who becomes a Non-Consenting Lender (as defined below) with a
replacement financial institution (which may be an existing Lender) pursuant to an assignment and
delegation, without recourse (in accordance with and subject to the restrictions contained in
Section 10.04), of all of such Non-Consenting Lender’s interests, rights and obligations
under this Agreement to such replacement financial institution that shall assume such obligations;
provided, that (i) if the proposed assignee is not a Lender or an Affiliate of a
Lender, the Borrower shall have received the prior written consent of the Administrative Agent and
L/C Issuer, which consent of the Administrative Agent and L/C Issuer shall not unreasonably be
withheld, conditioned or delayed, (ii) such Non-Consenting Lender shall have received payment of an
amount equal to the outstanding principal of its Loans and participations in L/C Advances and
Swingline Loans, accrued interest thereon, accrued fees and all other amounts payable to it
hereunder, from the assignee (to the extent of such outstanding principal and accrued interest and
fees) or the Borrower (in the case of all other amounts), (iii) the assignee and assignor shall
have
entered into an Assignment and Acceptance, and (iv) the assignee shall consent, at the time of
such assignment, to each matter in respect of which such Non-Consenting Lender refused to consent.
In the event that, at any time, (A) the Borrower has requested the Lenders to extend the Maturity
Date in accordance with Section 2.08(e), and (B) the Supermajority Lenders, but not all
Lenders, have agreed to such extension of the Maturity Date, then any Lender, at such time, who
does not agree to such extension of the Maturity Date shall be deemed a “Non-Consenting
Lender.”

ARTICLE III

REPRESENTATIONS AND WARRANTIES

     In order to induce the Administrative Agent, the Syndication Agent, the Co-Documentation
Agents, the L/C Issuer and the Lenders to enter into this Agreement and to make Loans and issue or
participate in Letters of Credit hereunder, the Borrower represents and warrants to the
Administrative Agent, the Syndication Agent, the Co-Documentation Agents, the L/C Issuer and the
Lenders (which representations and warranties are deemed made after giving effect to the Closing
Transactions) that each of the following statements is true and correct:

     Section 3.01 Existence and Power. Each Credit Party (a) is a corporation, partnership
or limited liability company duly incorporated or organized (as applicable), validly existing and,
if applicable for such Credit Party in the jurisdiction in issue, in good standing under the laws
of its jurisdiction of incorporation or organization, (b) has all requisite corporate, partnership
or limited liability company power (as applicable) required to carry on its businesses as now
conducted, and (c) is duly qualified to transact business as a foreign corporation, partnership or
limited liability company in each jurisdiction where a failure to be so qualified would reasonably
be expected to have a Material Adverse Effect.

     Section 3.02 Credit Party and Governmental Authorization; Contravention. The
execution, delivery and performance of this Agreement and the other Loan Documents by each Credit
Party (to the extent each Credit Party is a party to this Agreement and such Loan Documents) (a)
are within such Credit Party’s corporate, partnership or limited liability company (as applicable)
powers, (b) when executed will be duly authorized by all necessary corporate, partnership or
limited liability company (as applicable) action, (c) require no action by or in

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respect of, or
filing with, any Governmental Authority (other than (i) actions or filings pursuant to the Exchange
Act, (ii) actions or filings necessary to create or perfect the Liens required hereby or by any
other Loan Document, (iii) actions or filings that have been taken or made and are in full force
and effect, and (iv) actions or filings which, if not taken or made, would not reasonably be
expected to have a Material Adverse Effect) and (d) do not (i) contravene, or constitute a default
under, any provision of (A) applicable Governmental Rule (including, without limitation, Regulation
U), except any contravention or default that would not reasonably be expected to have a Material
Adverse Effect, (B) the articles or certificate of incorporation or formation, bylaws, regulations,
partnership agreement, limited liability company agreement or comparable charter documents of any
Credit Party, or (C) any agreement, judgment, injunction, order, decree or other instrument binding
upon any Credit Party, except any contravention or default that would not reasonably be expected to
have a Material Adverse Effect, or (ii) result in the creation or imposition of any Lien on any
Mortgaged Property or other Collateral other than the Liens securing the Lender Indebtedness.

     Section 3.03 Binding Effect. This Agreement constitutes, and each other Loan Document
when executed and delivered will constitute, valid and binding obligations of each Credit Party
which is a party thereto, enforceable against each such Credit 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).

     Section 3.04 Financial Condition; No Material Adverse Effect.

          (a) The Current Information fairly presents, in all material respects, the financial condition
and results of operations of the Borrower and its Consolidated Subsidiaries on a consolidated basis
as of the dates and for the periods reflected therein in conformity with GAAP (except that the
balance sheet and other financial statements delivered pursuant to Section 6.01(b) do not
include footnotes required in accordance with GAAP and are subject to normal year end audit
adjustments).

          (b) Except as disclosed in writing to the Lenders prior to the execution and delivery of this
Agreement, since December 31, 2006, no event or circumstance which would reasonably be expected to
have a Material Adverse Effect has occurred.

          (c) The Borrower and each of its Subsidiaries, on a consolidated basis, are Solvent.

     Section 3.05 Properties.

          (a) Each Credit Party has Defensible Title to all of its Property, and none of such Property
is subject to any Lien other than Permitted Encumbrances.

          (b) Subject to Permitted Encumbrances, the Pipeline Systems are covered by fee deeds, rights
of way, easements, leases, servitudes, permits, licenses, or other instruments (collectively,
“rights of way”) in favor of the applicable Credit Parties, recorded or filed, as
applicable and if and to the extent required in accordance with applicable law to be so recorded

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or
filed, in the Real Property Records of the county where the property covered thereby is located or
with the office of the applicable Railroad Commission or the applicable Department of
Transportation, except where the failure of the Pipeline Systems to be so covered, or any such
documentation to be so recorded or filed, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect. Subject to Permitted Encumbrances and except to the
extent the failure would not reasonably be expected to have a Material Adverse Effect, the rights
of way granted to the Borrower or any other Credit Party that cover any Pipeline Systems establish
a continuous right of way for such Pipeline Systems such that the applicable Credit Parties are
able to construct, operate, and maintain the Pipeline Systems in, over, under, or across the land
covered thereby in the same way that a prudent owner and operator would construct, operate, and
maintain similar assets.

          (c) Subject to the Permitted Encumbrances, the Processing Plants are covered by fee deeds,
real property leases, or other instruments (collectively “deeds”) in favor of the Credit
Parties, except to the extent the failure to be so covered would not reasonably
be expected to have a Material Adverse Effect. Subject to Permitted Encumbrances and except
to the extent the failure would not reasonably be expected to have a Material Adverse Effect, the
deeds do not contain any restrictions that would prevent the Credit Parties from constructing,
operating and maintaining the Processing Plants in, over, under, and across the land covered
thereby in the same way that a prudent owner and operator would construct, operate, and maintain
similar assets.

          (d) There is no (i) breach or event of default on the part of the Borrower or any other Credit
Party with respect to any right of way or deed granted to the Borrower or any other Credit Party
that covers any of the Processing Plants or Pipeline Systems, (ii) to the knowledge of any
Responsible Officer of the General Partner, breach or event of default on the part of any other
party to any right of way or deed granted to the Borrower or any other Credit Party that covers any
of the Processing Plants or Pipeline Systems, and (iii) event that, with the giving of notice or
lapse of time or both, would constitute such breach or event of default on the part of the Borrower
or any other Credit Party with respect to any right of way or deed granted to the Borrower or any
other Credit Party that covers any of the Processing Plants or Pipeline Systems or, to the
knowledge of any Responsible Officer of the General Partner, on the part of any other party
thereto, in the case of clauses (i), (ii) and (iii) above, to the extent
any such breach, default or event, individually or in the aggregate, would reasonably be expected
to have a Material Adverse Effect. The rights of way and deeds granted to the Borrower or any
other Credit Party that cover any of the Processing Plants or Pipeline Systems (to the extent
applicable) are in full force and effect in all material respects and are valid and enforceable
against the applicable Credit Party party thereto in accordance with their terms (subject to the
effect of any applicable bankruptcy, reorganization, insolvency, moratorium, fraudulent transfer,
fraudulent conveyance or similar laws effecting creditors’ rights generally and subject, as to
enforceability to the effect of general principles of equity) and all rental and other payments due
thereunder by the applicable Credit Parties have been duly paid in accordance with the terms of the
deeds and rights of way (as such terms are defined in this Section 3.05) except, in each
case, to the extent that a failure, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect.

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          (e) The Pipeline Systems are located within the confines of the rights of way granted to the
Borrower or any other Credit Party and do not encroach upon any adjoining property, except to the
extent the failure to be so located or any such encroachment would not reasonably be expected to
have a Material Adverse Effect. The Processing Plants are located within the boundaries of the
property affected by the deeds, leases or other instruments to the Borrower or the other Credit
Parties and do not encroach upon any adjoining property, except to the extent the failure to be so
located or any such encroachment would not reasonably be expected to have a Material Adverse
Effect. The buildings and improvements owned or leased by the Borrower and the other Credit
Parties, and the operation and maintenance thereof, do not (i) contravene any applicable zoning or
building law or ordinance or other administrative regulation or (ii) violate any applicable
restrictive covenant or any Governmental Rule, except to the extent the contravention or violation
of which would not reasonably be expected to have a Material Adverse Effect.

          (f) The material Properties used or to be used in the Credit Parties’ Midstream Activities are
in good repair, working order, and condition, normal wear and tear excepted,
except to the extent the failure would not reasonably be expected to have a Material Adverse
Effect. Neither the Properties of the Borrower nor any of the other Credit Parties has been
affected, since the Closing Date, in any adverse manner as a result of any fire, explosion,
earthquake, flood, drought, windstorm, accident, strike or other labor disturbance, embargo,
requisition or taking of Property or cancellation of contracts, permits or concessions by a
Governmental Authority, riot, activities of armed forces or acts of God or of any public enemy in
each case that either (i) would reasonably be expected to have a Material Adverse Effect or (ii)
has not since been repaired, restored or replaced in a manner, or with substitute assets, that, in
the commercially reasonable judgment of the Borrower, make such affected Properties substantially
comparable or better than immediately prior to any such occurrence or, in the case of replacement
assets, are substantially comparable to or better than the affected Properties prior to such
occurrence.

          (g) No eminent domain proceeding or taking has been commenced or, to the knowledge of any
Responsible Officer of the General Partner, is contemplated with respect to all or any portion of
the Pipeline Systems or the Processing Plants except for that which, individually or in the
aggregate, would not reasonably be expected to have a Material Adverse Effect.

          (h) No portion of the Processing Plants is located in a special flood hazard area as
designated by any Governmental Authority.

          (i) Each Credit Party owns, or is licensed to use, all trademarks, tradenames, copyrights,
patents and other intellectual property material to its business, and the use thereof by the Credit
Parties does not infringe upon the rights of any other Person, except for any failure to own or be
licensed to use such intellectual property, or any such infringements, in each case that would not
reasonably be expected to have a Material Adverse Effect.

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     Section 3.06 Litigation and Environmental Matters.

          (a) Except for the Disclosed Matters, there are no actions, suits or proceedings not fully
covered by insurance (except for normal deductibles and provided that the applicable insurance
company has acknowledged such coverage and a copy thereof is provided to the Administrative Agent)
by or before any arbitrator or Governmental Authority pending against or, to the knowledge of any
Responsible Officer of the General Partner, threatened against any Credit Party in which there is a
reasonable possibility of an adverse decision which would reasonably be expected to have a Material
Adverse Effect.

          (b) Except for the Disclosed Matters, no Credit Party (i) has failed to comply with any
Environmental Law or to obtain, maintain or comply with any permit, license or other approval
required under any Environmental Law, except where such failure to comply, obtain or maintain would
not reasonably be expected to have a Material Adverse Effect, (ii) has become subject to any
Environmental Liability which would, individually or in the aggregate, reasonably be expected to
have a Material Adverse Effect, (iii) has received written notice of any claim with respect to any
Environmental Liability that would reasonably be expected to have a Material Adverse Effect or (iv)
knows of any basis for any Environmental Liability, except to the extent
such event, individually or in the aggregate, would not reasonably be expected to have a
Material Adverse Effect.

     Section 3.07 Compliance with Laws and Agreements. The business and operations of the
Credit Parties have been and are being conducted in accordance with all applicable Governmental
Rules applicable to it or its Property, including, without limitation, all FERC and State Pipeline
Regulatory Agency regulations, except to the extent any noncompliance would not reasonably be
expected to have a Material Adverse Effect.

     Section 3.08 Investment Company Status. No Credit Party is an “investment company” as
defined in, or subject to regulation under, the Investment Company Act of 1940, as amended and in
effect from time to time.

     Section 3.09 Taxes. Except as otherwise permitted by Section 6.04, each
Credit Party (a) has timely filed or caused to be filed all tax returns and reports required to
have been filed with any applicable Governmental Authority, except when (i) extensions for the
filing thereof have been obtained in accordance with applicable Governmental Rules, or (ii) the
failure would not reasonably be expected to have a Material Adverse Effect, and (b) has paid or
caused to be paid all Taxes required to have been paid by it.

     Section 3.10 ERISA. No Credit Party nor any ERISA Affiliate has at any time within
six years prior to the Closing Date sponsored, maintained or contributed to any Multiemployer Plan,
and no act, omission or transaction has occurred which could result in an imposition on any Credit
Party or any ERISA Affiliate (whether directly or indirectly) of (a) either a civil penalty
assessed pursuant to Subsections (c), (i) or (l) of Section 502 of ERISA or a tax imposed pursuant
to Chapter 43 of Subtitle D of the Code or (b) breach of fiduciary duty liability damages under
Section 409 of ERISA which, in either case, would reasonably be expected to have a Material Adverse
Effect.

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     Section 3.11 Disclosure. The Borrower has disclosed to the Administrative Agent all
matters known to it (other than matters of general public knowledge including matters contained in
the Borrower’s or the Parent’s filings with the Securities and Exchange Commission), that,
individually or in the aggregate, would reasonably be expected to have a Material Adverse Effect.
All information heretofore furnished by each Credit Party to the Administrative Agent or any Lender
for purposes of or in connection with this Agreement, any Loan Document or any transaction
contemplated hereby or thereby is, and all such information hereafter furnished by or on behalf of
any Credit Party to the Administrative Agent or any Lender will be, true, complete and accurate in
every material respect; provided, that, with respect to projected and pro forma
financial information, the Borrower represents only that such information was prepared in good
faith based upon assumptions believed to be reasonable at the time made, it being recognized by the
Agents and Lenders that such financial information as it relates to future events is not to be
viewed as fact and that actual results during the period covered by such financial information may
differ from the provided results as set forth therein by a material amount.

     Section 3.12 Capital Structure. Schedule 3.12 hereto accurately reflects, as
of the Closing Date, (a) the jurisdiction of incorporation or organization of Borrower and each of
the other Credit Parties, (b) each jurisdiction in which any Credit Party is qualified to transact
business as a foreign corporation, foreign partnership or foreign limited liability company,
(c) the organizational identification number (if applicable) of the Borrower and each of the other
Credit Parties in its jurisdiction of organization, (d) the outstanding Equity Interests of
Borrower and each of the other Credit Parties, and (e) each of the Material Subsidiaries.

     Section 3.13 Use of Loans. The proceeds of the Loans will be used only (a) to
partially finance the Closing Distributions on the Closing Date, (b) to finance the fees and
expenses related to the Closing Transactions, (c) to make the Restricted Payments in compliance
with Section 7.05(c), (d) to fund the Credit Parties’ Capital Expenditures and permitted
acquisitions and for working capital and other general partnership purposes, and (e) for the
issuance of Letters of Credit. No part of the proceeds of any Loan will be used, whether directly
or indirectly, for any purpose that entails a violation of any of the regulations of the Board,
including Regulation U. Subject to the terms set forth in this Agreement, Letters of Credit will
be issued to support the general business requirements and purposes of the Credit Parties.

     Section 3.14 Material Contracts. Schedule 3.14 lists, as of the Closing Date
and after giving effect to the Closing Transactions, each Material Contract. The Gathering and
Processing Agreement is in full force and effect, except for such matters in respect of such
Gathering and Processing Agreement that individually, or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect. The Credit Parties have in all material respects
performed all obligations required to be performed by them under the Gathering and Processing
Agreement, and are not in default under any obligation of such Gathering and Processing Agreement,
and, to the knowledge of any Responsible Officer of the General Partner, no other party to such
Gathering and Processing Agreement is in default thereunder, except, in each case, to the extent
any such failure to perform or any such defaults, individually or in the aggregate, would not
reasonably be expected to have a Material Adverse Effect. As of the Closing Date, the Credit
Parties have not (a) assigned to any Person (other than the Administrative Agent) any of their
rights under the Material Contracts, or (b) waived any of their rights of material value under the
Material Contracts.

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     Section 3.15 Hedging Agreements. As of the Closing Date, no Credit Party has entered
into, or has any liability with respect to, any Hedging Agreement.

     Section 3.16 Defaults. No Default hereunder has occurred and is continuing.

     Section 3.17 Insurance. Schedule 3.17 attached hereto sets forth, as of the
Closing Date, an accurate and complete description of all material policies of fire, liability,
workmen’s compensation and other forms of insurance owned or held by, or maintained on behalf and
for the benefit of, the Borrower and the other Credit Parties. All such policies, or the
replacement and additional policies required to be obtained pursuant to the terms of this
Agreement, are in full force and effect, all premiums due with respect thereto have been paid, and
no notice of cancellation or termination has been received with respect to any such policy. Such
policies, and/or such replacement or additional policies required to be obtained or maintained
pursuant to the terms of this Agreement as may be in full force and effect as of any date
subsequent to the Closing Date, are sufficient for compliance in all material respects with all
applicable requirements of law and of all agreements to which the Borrower and the other Credit
Parties are party; are valid, outstanding and enforceable policies; provide adequate aggregate
coverage in at
least such amounts and against at least such risks (but including in any event public
liability) as are usually insured against in the same general area by companies engaged in the same
or similar business for the assets and operations of the Borrower and the other Credit Parties, and
will not in any way be affected by, or terminate or lapse by reason of, the transactions
contemplated by this Agreement.

     Section 3.18 Priority; Security Matters. Subject to the proviso to the second
sentence of Article V hereof and the last sentence of Section 6.09(a), the Lender
Indebtedness is and shall be at all times secured by valid, perfected first and prior Liens
(subject only to Permitted Encumbrances) in favor of the Administrative Agent, covering and
encumbering (a) the Mortgaged Property, (b) all of the outstanding Equity Interests owned by the
Borrower of each existing and future Material Subsidiary (except that, if such Material Subsidiary
is a Foreign Subsidiary, the Equity Interests of such Material Subsidiary to be pledged shall be
limited to 65% of the total combined voting power of all classes of voting Equity Interests of such
Material Subsidiary and 100% of all non-voting Equity Interests of such Material Subsidiary), (c)
all of the outstanding Equity Interests owned by each Pledging Subsidiary of the Borrower of each
existing and future Material Subsidiary thereof (except that, if such Material Subsidiary is a
Foreign Subsidiary, the Equity Interests of such Material Subsidiary to be pledged shall be limited
to 65% of the total combined voting power of all classes of voting Equity Interests of such
Material Subsidiary and 100% of all non-voting Equity Interests of such Material Subsidiary) and
(d) all other Collateral owned by the Borrower or any Material Subsidiary, pursuant to the Guaranty
and Collateral Agreement, the Mortgages and other Security Instruments delivered pursuant to
Section 4.01(f), or otherwise delivered pursuant to this Agreement or the other Loan
Documents, to the extent perfection has or will occur, by the recording of a Mortgage, the filing
of a UCC financing statement, or by possession or control.

     Section 3.19 Licenses, Permits, Etc. Each Credit Party possesses such valid
franchises, certificates of convenience and necessity, operating rights, licenses, permits,
consents, authorizations, exemptions and orders of Governmental Authorities as are necessary to
carry on its business as now conducted and as proposed to be conducted, except to the extent a

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failure to obtain any such item would not reasonably be expected to have a Material Adverse Effect.

     Section 3.20 Supplemental Indenture. So long as and to the extent Section
10.20 is in effect pursuant to the terms of such Section 10.20, neither the Borrower
nor any of its Subsidiaries is a “Restricted Subsidiary” as such term, or any comparable term, is
defined in the Supplemental Indenture, or any comparable term in any other documentation now or
hereafter evidencing any Indebtedness of the Parent.

ARTICLE IV

CONDITIONS

     Section 4.01 Effective Date. This Agreement, the obligation of each Lender to make
the Loans on the Effective Date, and the obligation of L/C Issuer to issue the initial Letters of
Credit hereunder, is subject to the satisfaction (or waiver in accordance with Section
10.02) of each of the following conditions:

          (a) The Administrative Agent (or its counsel) shall have received from each party hereto
either (i) a counterpart of this Agreement signed on behalf of such party or (ii) written evidence
satisfactory to the Administrative Agent (which may include telecopy or other acceptable electronic
transmission of a signed signature page of this Agreement) that such party has signed a counterpart
of this Agreement.

          (b) The Administrative Agent shall have received written opinions (addressed to the
Administrative Agent and the Lenders and dated the Effective Date) of (i) Jones Day, counsel to the
Credit Parties, and (ii) General Counsel of the General Partner, in each case in form and substance
reasonably satisfactory to the Administrative Agent, such opinions covering such matters relating
to the Credit Parties and the Loan Documents as the Administrative Agent shall reasonably request.

          (c) The Administrative Agent shall have received such documents and certificates as the
Administrative Agent or its counsel may reasonably request relating to the organization, existence
and good standing in its jurisdiction of organization of each of the Credit Parties, the
authorization of the Financing Transactions and any other legal matters relating to the Borrower,
the other Credit Parties, this Agreement, the Closing Transactions or the Financing Transactions,
all in form and substance reasonably satisfactory to the Administrative Agent and its counsel.

          (d) The Administrative Agent shall have received a certificate, dated the Effective Date and
signed by a Responsible Officer of the General Partner on behalf of the Borrower, confirming
compliance with the conditions set forth in Section 4.02(a) and Section 4.02(b).

          (e) Each Lender requesting a Note shall have received a duly completed and executed Note,
payable to the order of such Lender.

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          (f) The Administrative Agent shall have received each of the Security Instruments, including
those described on Exhibit C-1, duly completed and executed in sufficient number of
counterparts for recording, if necessary.

          (g) The Administrative Agent shall have received certificates of insurance coverage evidencing
that insurance is being maintained on behalf and for the benefit of the Credit Parties in
accordance with Section 6.05 and otherwise reasonably satisfactory to the Administrative
Agent in all respects.

          (h) The Administrative Agent shall have (i) satisfactorily completed (in its reasonable
determination) its review of (A) the title information of the Mortgaged Properties, and (B) the
processes, contracts, business model, historical cash flow and gas throughput with respect to the
Mortgaged Properties and (ii) received true, correct and complete copies of all Material Contracts
requested by the Administrative Agent, and the Administrative Agent shall be satisfied with the
terms and conditions thereof in its reasonable discretion.

          (i) The Administrative Agent shall have received, and satisfactorily completed (in its
reasonable determination) its review of, environmental reports prepared for the
benefit of the Credit Parties relating to the Mortgaged Properties to the extent such
environmental reports exist.

          (j) The Administrative Agent shall be satisfied in its reasonable discretion with the
organizational and capital structure of the Borrower.

          (k) The Borrower and the other Credit Parties shall have obtained, and the Administrative
Agent shall have received, copies of all material governmental and other material third party
approvals and consents (if any) necessary in connection with the Financing Transactions, the
Closing Transactions and the continuing operation and maintenance of the Pipeline Systems and the
Processing Plants, and all applicable waiting periods and appeal periods shall have expired, in
each case without the imposition of any materially burdensome conditions. There shall be no actual
government or judicial action restraining, preventing or imposing materially burdensome conditions
on the Closing Transactions or Financing Transactions.

          (l) The Closing Transactions shall have occurred (or the Administrative Agent shall be
satisfied that such transactions will occur simultaneously with the Effective Date and initial
Borrowing hereunder).

          (m) The Administrative Agent shall have received appropriate UCC search reports with respect
to the Borrower and the other Credit Parties reflecting no prior Liens, except for Permitted
Encumbrances or Liens that have been released. All filings, notices, recordings and other action
necessary to perfect the Liens in the Collateral shall have been made, given or accomplished or
arrangements for the completion thereof reasonably satisfactory to the Administrative Agent and its
counsel shall have been made and all filing fees and other expenses related to such actions either
have been paid in full or arrangements have been made for their payment in full which are
reasonably satisfactory to the Administrative Agent.

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          (n) There shall not have occurred since December 31, 2006 any events that, individually or in
the aggregate, have had a Material Adverse Effect.

          (o) The Administrative Agent, the Syndication Agent and the Arrangers shall have received all
fees and other amounts due and payable on or prior to the Effective Date with respect to this
Agreement, including, without limitation, fees pursuant to the Fee Letters and, to the extent the
Borrower receives an invoice therefor at least two Business Days prior to the Effective Date,
reimbursement or payment of all reasonable out-of-pocket expenses required to be reimbursed or paid
by the Borrower hereunder.

          (p) The Administrative Agent shall have received a certificate of a Responsible Officer of the
General Partner on behalf of the Borrower setting forth a reasonably detailed calculation of the
Consolidated Leverage Ratio as of the Closing Date (and after giving pro forma effect to the
Closing Transactions), which calculation shall demonstrate that such Consolidated Leverage Ratio
does not exceed 4.75:1.00.

          (q) The Administrative Agent shall have received a copy of the Parent Subordinated Note, duly
executed by the Borrower.

          (r) The Administrative Agent shall have received such other customary instruments and
documents as any of the Administrative Agent, the Lenders or their counsel may reasonably request,
other than title insurance policies, surveys and appraisals with respect to any owned or leased
real property of the Borrower or any of its Subsidiaries.

The Administrative Agent shall notify the Borrower and the Lenders of the Effective Date, and such
notice shall be conclusive and binding. Notwithstanding the foregoing, the obligation of each
Lender to make its Loans on the Effective Date, and the obligation of L/C Issuer to issue the
initial Letters of Credit, shall not become effective unless each of the foregoing conditions is
satisfied or waived in accordance with Section 10.02.

     Section 4.02 Each Credit Event. The obligation of each Lender to make, convert or
continue a Loan on the occasion of any Borrowing, and of the L/C Issuer to make any L/C Credit
Extension, is subject to the satisfaction of the following conditions:

          (a) The representations and warranties of the Credit Parties set forth in this Agreement and
the other Loan Documents (other than the representations and warranties set forth in Section
3.05(b), which representations and warranties shall only be made as of the Effective Date and
also in accordance with Section 6.01(c)) shall be true and correct in all material respects
on and as of the date of such Borrowing or L/C Credit Extension (unless stated to relate solely to
an earlier date, in which case such representation and warranty shall have been true and correct in
all material respects on and as of such earlier date), except to the extent previously waived in
writing by the Lenders or the Required Lenders, as applicable.

          (b) At the time of and immediately after giving effect to such Borrowing or L/C Credit
Extension, no Default or Event of Default shall have occurred and be continuing.

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Each Borrowing and each L/C Credit Extension shall be deemed to constitute a representation and
warranty by the Borrower on the date thereof as to the matters specified in Section 4.02(a)
and Section 4.02(b).

ARTICLE V

SECURITY

     Subject to the proviso to the immediately following sentence and the last sentence of
Section 6.09(a), the Lender Indebtedness shall be secured by perfected, first priority
Liens (subject only to Permitted Encumbrances) on and encumbering (a) all of the Equity Interests
of the Credit Parties (other than the Borrower and except that a pledge of Equity Interests of a
Foreign Subsidiary shall be limited to 65% of the total combined voting power of all classes of
voting Equity Interests and 100% of all non-voting Equity Interests), and (b) substantially all
assets of the Credit Parties, whether now owned or hereafter acquired and wherever located, as
provided in the Security Instruments. In furtherance of the foregoing, the Borrower hereby agrees
to execute and deliver (and to cause the other Credit Parties to execute and deliver) to the
Administrative Agent for the benefit of the Lenders and Secured Affiliates, promptly upon request
by the Administrative Agent, such Security Instruments and other documents, instruments, agreements
and certificates as required by applicable law to create, evidence and perfect the Liens
contemplated by this Article V and the Security Instruments; provided,
that,
notwithstanding anything to the contrary contained in any Loan Document, the Credit Parties
shall in no event be required to pledge or grant any security interests in any of the following
that may now or hereafter be owned or leased by the Borrower or any Material Subsidiary, or to
which the Borrower or any Material Subsidiary is a party: (i) Intellectual Property (as such term
is defined in the Guaranty and Collateral Agreement) rights, privileges and priorities that arise
under Governmental Rules other than those of the United States or any state, province or other
jurisdiction thereof, (ii) Vehicles (as such term is defined in the Guaranty and Collateral
Agreement), (iii) leases with a primary term of twelve months or less or which can be terminated by
the lessee upon notice of one year or less without incurring a penalty, or which, for any lease,
provides for receipt or payment of less than $500,000, (iv) Equipment (as such term is defined in
the Guaranty and Collateral Agreement) leased by a Credit Party under a lease that prohibits the
granting of a Lien on such Equipment or other Property subject to Liens permitted by clause
(o) of the definition of “Permitted Encumbrances” to the extent the contract or agreement
related thereto prohibits the granting of a Lien in such Property, (v) Foreign Subsidiary Voting
Stock (as such term is defined in the Guaranty and Collateral Agreement) to the extent (but only to
the extent) required to prevent the Collateral from including more than 65% of all voting Equity
Interests in such Foreign Subsidiary, (vi) securities accounts, investment accounts, escrow
accounts for sales and collateral accounts and bonds for the benefit of regulatory authorities,
(vii) cash (other than (A) as provided in Section 6.11 hereof or in Section 5.11 of the
Guaranty and Collateral Agreement, and (B) Cash Collateral deposited with the Administrative Agent
for the benefit of the L/C Issuer and the Lenders pursuant to the terms of this Agreement), (viii)
Equity Interests of any Person that a Credit Party is not required to pledge in accordance with
Section 3.18 and that such Credit Party does not elect to pledge in order to have
Investments in such Person be Permitted Investments in accordance with this Agreement, (ix)
hydrocarbons owned or controlled by producers or other third parties, and (x) any General
Intangibles (as such term is defined in the Guaranty and Collateral Agreement), or other rights
arising under any contract, agreement, instrument, indenture, lease, license, permit, franchise,
letter of credit or other

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document, if (but only to the extent that) the grant of a security
interest therein or the assignment thereof is prohibited by applicable law or results in a breach
or termination of, or constitutes a default under, any agreement, instrument, indenture, lease,
license, permit, franchise, letter of credit or other document governing or pertaining to any such
General Intangible or any such other right or under which any such General Intangible or other
right arises, unless and until all required consents shall have been obtained (it being understood
that the foregoing shall not be deemed to obligate the applicable Credit Party, and the applicable
Credit Party shall not be obligated, to obtain any such consent). The Borrower hereby authorizes
(and each other Credit Party hereby authorizes) the Administrative Agent, and its agents,
successors and assigns, to file any and all necessary financing, assignment, amendment and/or
continuation statements under the UCC as necessary from time to time (in the Administrative Agent’s
reasonable discretion) to perfect (or continue perfection of) the Liens granted pursuant to the
Security Instruments, , and hereby ratifies its authorization for any such financing statements
filed prior to the date hereof.

ARTICLE VI

AFFIRMATIVE COVENANTS

     Until the Commitments have expired or been terminated and the principal of and interest on
each Loan and all fees payable hereunder shall have been paid in full, and all Letters of Credit
shall have expired or terminated and all L/C Obligations shall have been paid or reimbursed in
full, the Borrower covenants and agrees with the Lenders that:

     Section 6.01 Financial Statements and Other Information. The Borrower will furnish,
or cause to be furnished, to the Administrative Agent:

          (a) as soon as available, but in any event within 120 days after the end of each Fiscal Year
(or not later than one Business Day after such earlier filing date as may be required under any
applicable regulations of the Securities and Exchange Commission, or any successor thereto), the
audited consolidated balance sheet of the Borrower and its Consolidated Subsidiaries and the
related statements of operations, partners’ capital and cash flows as of the end of and for such
Fiscal Year, setting forth in each case in comparative form the figures for the previous Fiscal
Year, with such consolidated statements reported on by a firm of independent public accountants of
recognized national standing to the effect that such consolidated statements present fairly in all
material respects the financial condition and results of operations of the Borrower and its
Consolidated Subsidiaries on a consolidated basis in accordance with GAAP consistently applied;

          (b) as soon as available, but in any event within 60 days after the end of the first three
Fiscal Quarters of each Fiscal Year (or not later than one Business Day after such earlier filing
date as may be required under any applicable regulations of the Securities and Exchange Commission,
or any successor thereto), the unaudited consolidated balance sheet of the Borrower and its
Consolidated Subsidiaries and the related statements of operations as of the end of and for such
Fiscal Quarter and the then elapsed portion of the Fiscal Year and the related statement of cash
flows for the then elapsed portion of the Fiscal Year, setting forth in each case in comparative
form the figures for the corresponding period or periods (or, in the case of the balance sheet, as
of the end of) of the previous Fiscal Year, with such consolidated statements certified by a
Responsible Officer of the General Partner on behalf of the Borrower as presenting

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fairly in all
material respects the financial condition and results of operations of the Borrower and its
Consolidated Subsidiaries on a consolidated basis in accordance with GAAP consistently applied
(other than the inclusion of footnotes required in accordance with GAAP and subject to normal year
end adjustments);

     (c) concurrently with any delivery of financial statements under Section 6.01(a) or
Section 6.01(b) above, a certificate of a Responsible Officer of the General Partner on
behalf of the Borrower (i) certifying as to whether a Default then exists, and, if a Default then
exists, specifying the details thereof and any action taken or proposed to be taken with respect
thereto, (ii) setting forth reasonably detailed calculations demonstrating compliance with
Section 7.13 and Section 7.14, and setting forth a calculation of the Consolidated
Interest Coverage Ratio and the Consolidated Leverage Ratio as of the date ending on the last day
of the Fiscal Year or Fiscal Quarter to which such financial statements relate, and (iii)
certifying that the representations and warranties set forth in Section 3.05(b) are true
and correct in all material respects on and as of the date of such certificate;

     (d) promptly after the same become publicly available, copies of all periodic and other
reports, proxy statements and other materials, if any, filed by any Credit Party with the
Securities and Exchange Commission, or any Governmental Authority succeeding to any or all
of the functions of said Commission, or with any national securities exchange, and not
otherwise required to be delivered to the Administrative Agent pursuant to this Agreement (except
to the extent any of the foregoing are publicly available on the Securities and Exchange
Commission’s LivEdgar website and the Borrower has provided notice to the Administrative Agent
thereof);

     (e) promptly following the annual renewal of the insurance policies required to be maintained
by or for the benefit of the Credit Parties pursuant to Section 6.05 each May 1 after the
Effective Date, certificate(s) of insurance coverage from the applicable insurer(s) in form and
substance reasonably satisfactory to the Administrative Agent evidencing the insurance coverage
required to be maintained by or for the benefit of the Credit Parties pursuant to Section
6.05 and, if requested by the Administrative Agent, copies of the applicable insurance policies
referenced therein;

     (f) promptly following any reasonable request therefore by the Administrative Agent (but in no
event more than four (4) times each Fiscal Year), a report of gas gathering output and throughput
with respect to the Pipeline Systems and Processing Plants, each such report to be in form and
substance reasonably satisfactory to the Administrative Agent;

     (g) promptly, but in no event later than five (5) Business Days following any Debt Offering
(but without waiving the requirement of the Required Lenders’ consent to any such offering in
violation of any Loan Document), true, correct and complete copies of the material definitive
documents regarding such Debt Offering;

     (h) as soon as available but in no event later than five (5) Business Days following the
closing of any Material Acquisition (but without waving the requirement of the Required Lenders’
consent to any such Acquisition in violation of any Loan Document), true, correct and complete
copies of the definitive documents regarding the acquired assets, including any schedules
reflecting litigation liabilities, environmental liabilities, and other assumed

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liabilities, and
any other information regarding the acquired assets as the Administrative Agent may reasonably
request; and

          (i) promptly following any request therefore by the Administrative Agent, such other
information regarding the operations, business affairs and financial condition of any Credit Party,
or compliance with the terms of this Agreement, in each case as the Administrative Agent may
reasonably request.

     Notwithstanding the foregoing in this Section 6.01, reports and other information
required to be delivered pursuant to Section 6.01(a), Section 6.01(b) and
Section 6.01(d) shall be deemed to have been delivered on the date on which the Borrower
posts such reports on its Intralinks website, the Securities and Exchange Commission’s website or
at such other website as, in each case, notified to the Administrative Agent.

     Section 6.02 Notices of Certain Events. Promptly but in no event later than five (5)
Business Days (if such occurrence continues to exist as of such fifth Business Day) after a
Responsible Officer of the General Partner learns of the receipt or occurrence of any of the
following, the Borrower will furnish to the Administrative Agent a certificate of the Borrower,
signed by a Responsible Officer of the General Partner on behalf of the Borrower, specifying
(a) any official notice of any violation, possible violation, non-compliance or possible
non-compliance, or claim made by any Governmental Authority pertaining to all or any part of the
properties or assets of the Borrower or any of its Subsidiaries, in each case, which would
reasonably be expected to have a Material Adverse Effect; (b) any event which constitutes a Default
or Event of Default, together with a detailed statement specifying the nature thereof and the steps
being taken to cure such Default or Event of Default; (c) the receipt of any notice from, or the
taking of any other action by, the holder of any Material Indebtedness of any Credit Party with
respect to a claimed default, together with a detailed statement specifying the notice given or
other action taken by such holder and the nature of the claimed default and what action the
Borrower is taking or proposes to take with respect thereto; (d) any event or condition not
previously disclosed to the Administrative Agent which violates any Environmental Law and which
would reasonably be expected to have a Material Adverse Effect; (e) any event or condition which
has had a Material Adverse Effect; (f) any notice of the institution of, or any judgment rendered
in, any action, suit or proceeding or any governmental investigation or any arbitration, before any
Governmental Authority or arbitrator, against any Credit Party or any material property or asset of
any thereof, in which the amount involved is material and is not covered by insurance (except for
normal deductibles) and which, if adversely determined, would reasonably be expected to have a
Material Adverse Effect; or (g) the occurrence of a “prohibited transaction,” as such term is
defined in Section 406 of ERISA or Section 4975 of the Code, with respect to any Plan which would
reasonably be expected to have a Material Adverse Effect, which such notice shall specify the
nature thereof, the Borrower’s proposed response thereto (and, if applicable, the proposed response
thereto of any Subsidiary and of any ERISA Affiliate) and, where known, any action taken or
proposed by the Internal Revenue Service, the Department of Labor or the PBGC with respect thereto.

     Section 6.03 Existence; Conduct of Business. The Borrower will, and will cause each
of the other Credit Parties to, do or cause to be done all things necessary to preserve, renew and
keep in full force and effect its legal existence and the rights, licenses, permits, privileges and

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franchises material to the conduct of its business, except where the failure to do so would not
reasonably be expected to have a Material Adverse Effect (it being agreed that failure of the
Borrower to preserve, renew and keep its legal existence shall not be included in this exception);
provided, that the foregoing shall not prohibit any action permitted by Section
7.03 or Section 7.10.

     Section 6.04 Payment of Obligations. The Borrower will, and will cause each of the
other Credit Parties to, pay (a) all Taxes imposed upon it or any of its assets or with respect to
any of its franchises, business, income or profits before any material penalty or interest accrues
therein, and (b) all material claims (including, without limitation, claims for labor, services,
materials and supplies) for sums which have become due and payable and which by law have or might
become a Lien (other than a Permitted Encumbrance) on any of its assets; except where (i) the
validity, amount or applicability thereof is currently being contested in good faith by appropriate
proceedings, no material part of the Property of any Credit Party is subject to any pending levy or
execution, and the Borrower or such other Credit Party has set aside on its books adequate reserves
with respect thereto as and to the extent required in accordance with GAAP or (ii) the failure to
make payment pending such contest would not reasonably be expected to have a Material Adverse
Effect or result in the seizure or levy of any material Property of any Credit Party.

     Section 6.05 Maintenance of Properties; Insurance.

          (a) The Borrower will, and will cause each of the other Credit Parties to, (i) except as
permitted by Section 7.10, keep and maintain all of its material Property in good working
order and condition, ordinary wear and tear excepted, except to the extent the failure would not
reasonably be expected to have a Material Adverse Effect, and (ii) maintain, or cause to be
maintained, with financially sound and reputable insurance companies, insurance in such amounts,
against such risks and with such deductibles as are customarily maintained by companies engaged in
the same or similar businesses operating in the same or similar locations.

          (b) The Borrower will, and will cause each of the other Credit Parties to (i) maintain or
cause the maintenance of the interests and rights with respect to the rights-of-way for the
Pipeline Systems and the deeds for the Processing Plants except to the extent individually or in
the aggregate the failure would not reasonably be expected to have a Material Adverse Effect, (ii)
subject to the Permitted Encumbrances and except to the extent the failure would not reasonably be
expected to have a Material Adverse Effect, maintain the Pipeline Systems within the confines of
the rights of way granted to the applicable Credit Party with respect thereto without material
encroachment upon any adjoining property and maintain the Processing Plants within the boundaries
of the deeds and without material encroachment upon any adjoining property, (iii) maintain such
rights of ingress and egress necessary to permit the Credit Parties to inspect, operate, repair,
and maintain the Pipeline Systems and the Processing Plants to the extent that failure to maintain
such rights, individually or in the aggregate, would reasonably be expected to have a Material
Adverse Effect and provided that the Borrower or any other Credit Party may hire third parties to
perform these functions, and (iv) maintain all material agreements, licenses, permits, and other
rights required for any of the foregoing described in clauses (i), (ii) and
(iii) of this Section 6.05(b) in full force and effect in accordance with their
terms, timely make any payments due thereunder, and prevent any default thereunder which could
result in a

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termination or loss thereof, except any such failure to maintain any thereof or make
any such payments, or any such default, that would not reasonably, individually or in the
aggregate, be expected to have a Material Adverse Effect.

          (c) On the Closing Date, and as provided in Section 6.01(e), the Borrower will furnish
or cause to be furnished to the Administrative Agent a certificate of property and casualty
insurance coverage and of liability insurance coverage from the applicable insurance broker with
respect to all insurance required to be maintained pursuant to Section 6.05(a) in form and
scope reasonably satisfactory to the Administrative Agent and, if requested, will furnish the
Administrative Agent copies of the applicable policies showing the Administrative Agent as loss
payee or additional insured as its interest may appear on all such property and casualty insurance
policies. All such policies of insurance shall either have attached thereto a loss payable
endorsement for the benefit of the Administrative Agent in form reasonably satisfactory to the
Administrative Agent or shall name the Administrative Agent as an additional insured, as
applicable. All policies or certificates of insurance shall set forth the coverage, the limits of
liability, the name of the carrier, the policy number, and the period of coverage. The Borrower
shall take all commercially reasonable efforts to cause all such certificates of insurance with
respect to the Borrower and the other Credit Parties to contain a provision that notwithstanding
any contrary agreements with the applicable insurance company, such policies will not be canceled,
allowed to lapse without renewal, surrendered or amended (which provision shall
include any reduction in the scope or limits of coverage) without the applicable insurance
company endeavoring to provide at least thirty days’ prior written notice to the Administrative
Agent.

          (d) Promptly, and in any event within five (5) Business Days after a Responsible Officer of
the General Partner obtaining knowledge thereof, the Borrower shall notify the Administrative Agent
of any Casualty Event where the aggregate damage (net of any insurance proceeds received in
connection with such damage) to the Collateral exceeds or is reasonably expected to exceed
$1,500,000. With respect to any potential claims under any property insurance maintained by the
Borrower, after the occurrence and during the continuance of an Event of Default, the
Administrative Agent may, but shall not be required to, in consultation with the Borrower, make
proof of loss under, settle and adjust any claims under, and receive the proceeds under any such
insurance or direct the Borrower to take such actions at the direction of the Administrative Agent,
and the reasonable expenses incurred by the Administrative Agent in adjustment and collection of
such proceeds shall be paid by the Borrower. The Administrative Agent shall not be liable or
responsible for failure to collect or exercise diligence in the collection of any insurance
proceeds, absent the gross negligence or willful misconduct of the Administrative Agent.

     Section 6.06 Books and Records; Inspection Rights. The Borrower, on behalf of itself
and its Consolidated Subsidiaries, will keep proper books of record and account in which proper,
true and correct entries are made of all dealings and transactions in relation to its business and
activities, as and to the extent required in accordance with GAAP. The Borrower will, and will
cause each of the other Credit Parties to, permit any representatives designated by the
Administrative Agent or any Lender, upon reasonable prior notice, to visit and inspect its
properties, to examine and make extracts from its books and records, and to discuss its affairs,
finances and condition with the officers of the General Partner and, so long as the Borrower shall

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have been given reasonable notice thereof, its independent accountants, all at such reasonable
times during the Borrower’s or such Credit Party’s normal business hours (and in a manner so as, to
the extent practicable, not to interfere with the normal business operations of the Borrower or
such other Credit Party) and as often as reasonably requested, and upon and during the continuance
of an Event of Default, all at the expense of the Borrower. Notwithstanding the foregoing, as long
as no Event of Default has occurred and is continuing, the Borrower will not be required to bear
the expense of more than one inspection during any calendar year; provided, that,
if an Event of Default has occurred and is continuing, the Administrative Agent shall be entitled
to conduct more frequent inspections at the expense of the Borrower.

     Section 6.07 Compliance with Laws. The Borrower will, and will cause each of the
other Credit Parties to, comply with all Governmental Rules applicable to it or its Property,
except to the extent any noncompliance, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect.

     Section 6.08 Further Assurances. The Borrower will, and will cause each of the other
Credit Parties to, cure promptly any defects in the creation and issuance of the Notes and the
execution and delivery of the Security Instruments and this Agreement. The Borrower will, and will
cause each of the other Credit Parties to, promptly deliver to the Administrative Agent, upon
request, such information about the business and affairs and financial condition of such Credit
Parties as the Administrative Agent or any Lender shall reasonably request. Without limiting
the foregoing, the Borrower, at its expense, will, and will cause each of the other Credit Parties
to, promptly execute and deliver to the Administrative Agent, upon receipt, all such other
documents, agreements and instruments to comply with or accomplish the covenants and agreements of
the Borrower or any other Credit Party, as the case may be, in the Security Instruments and this
Agreement, or to further evidence and more fully describe the collateral intended as security for
the Lender Indebtedness, or to correct any omissions in the Security Instruments, or to state more
fully the security obligations set out herein or in any of the Security Instruments, or to perfect,
protect or preserve any Liens created pursuant to any of the Security Instruments, or to make any
recordings, to file any notices or obtain any consents, all as may be necessary or appropriate in
connection therewith.

     Section 6.09 Additional Collateral.

          (a) Subject to the limitations in the proviso to the second sentence of Article V
hereof and the last sentence of this Section 6.09(a), should the Borrower or any of the
other Credit Parties acquire or construct any additional Major Asset after the Closing Date in
accordance with, and as permitted by, the terms of this Agreement, the Borrower will, or will cause
such other Credit Party to, grant to the Administrative Agent as security for the Lender
Indebtedness and the obligations of the Credit Parties under the Loan Documents a first-priority
Lien (subject only to Permitted Encumbrances) on the Borrower’s or such Credit Party’s interest in
any such assets not already subject to a Lien under the Security Instruments, which Lien will be
created and perfected by and in accordance with the provisions of the Mortgages or other Security
Instruments, all in form and substance reasonably satisfactory to the Administrative Agent and in
sufficient executed (and acknowledged where necessary or appropriate) counterparts for recording
purposes. Subject to the limitations in the proviso to the second sentence of Article V
hereof and the last sentence of this Section 6.09(a), the Borrower shall, or

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shall cause
each applicable Credit Party to, promptly following the acquisition or construction of any
additional Major Asset in accordance with, and as permitted by, the terms of this Agreement, notify
the Administrative Agent in writing of such acquisition or construction and, by the applicable date
required by the last sentence of this Section 6.09(a), supply the Administrative Agent with
property descriptions on all such newly-acquired or constructed assets and shall, by the applicable
date required by the last sentence of this Section 6.09(a), execute and deliver additional
or supplemental Mortgages covering same as collateral security for the Lender Indebtedness and the
obligations of the Credit Parties under the Loan Documents. Notwithstanding anything to the
contrary contained herein, after the Closing Date, the requirement to supply property descriptions
for, execute and deliver additional or supplemental Mortgages with respect to, and/or grant and
perfect Liens in any assets that necessitate the filing of a Mortgage (or comparable document) to
create or perfect a Lien therein, pursuant to this Section 6.09(a) or any other provision
of any Loan Document shall be satisfied and consummated, as applicable, semi-annually on April 30
and October 31 of each year for all Property acquired on or before the date that is not less than
45 days before such semi-annual date (and if such Property is acquired less than 45 days before
such semi-annual date, such requirement shall be satisfied and consummated on the next following
semi-annual date), commencing October 31, 2007.

          (b) Concurrently with the granting of the Lien or other action referred to in Section
6.09(a) above, upon the reasonable request of the Administrative Agent, the Borrower will
provide to the Administrative Agent title information (including, without limitation, to the extent
reasonably required by the Administrative Agent in consultation with the Borrower, acceptable title
insurance policies, surveys and appraisals) in form and substance reasonably satisfactory to the
Administrative Agent with respect to the Credit Party’s interests in such Properties.

          (c) With respect to any new Material Subsidiary designated or defined as such after the
Closing Date in accordance with the terms of the definition thereof and the terms of this
Agreement, the Borrower will, or will cause the applicable Subsidiaries to, promptly (i) execute
and deliver to the Administrative Agent such Security Instruments as the Administrative Agent deems
necessary or advisable in order to grant to the Administrative Agent, for the benefit of the
Lenders and Secured Affiliates, a perfected first priority security interest (subject only to
Permitted Encumbrances) in the Equity Interests of such new Material Subsidiary which is owned by
the Borrower or a Pledging Subsidiary (except that a pledge of Equity Interests of a Foreign
Subsidiary shall be limited to 65% of the total combined voting power of all classes of voting
Equity Interests and 100% of all non-voting Equity Interests), (ii) deliver to the Administrative
Agent the certificates representing such Equity Interests (as applicable), together with undated
stock powers, in blank, executed and delivered by a Responsible Officer of such Credit Party or its
general partner or other applicable governing entity, as the case may be, (iii) cause such new
Material Subsidiary (other than a Foreign Subsidiary) (A) to become a party to the Guaranty and
Collateral Agreement and (B) to take such actions necessary or advisable to grant to the
Administrative Agent for the benefit of the Lenders and Secured Affiliates, a perfected first
priority security interest (subject only to Permitted Encumbrances) in such Material Subsidiary’s
(other than a Foreign Subsidiary’s) right, title and interest in the Collateral (as such term is
defined and described in the Guaranty and Collateral Agreement) with respect to such new Material
Subsidiary, including, without limitation, authorizing (to the extent not

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previously authorized)
the Administrative Agent to file UCC financing statements in such jurisdictions as may be required
by the Guaranty and Collateral Agreement or by applicable law or as may be reasonably requested by
the Administrative Agent, and (iv) if requested by the Administrative Agent, deliver to the
Administrative Agent legal opinions relating to the matters described above, which opinions shall
be in form and substance, and from counsel, reasonably satisfactory to the Administrative Agent.

          (d) Without limiting the foregoing, concurrently with the delivery of any new Mortgage in
accordance with Section 6.09(a) which is to be recorded in any jurisdiction outside the
State of Texas, upon the reasonable request of the Administrative Agent, the Borrower will provide
to the Administrative Agent an opinion addressed to the Administrative Agent for the benefit of the
Lenders in form and substance reasonably satisfactory to the Administrative Agent from local
counsel reasonably acceptable to the Administrative Agent, stating that such Mortgage is valid,
binding and enforceable in accordance with its terms and in legally sufficient form for recording
in such jurisdiction.

     Section 6.10 Environmental Matters.

          (a) The Borrower will, and will cause each other Credit Party to, establish and implement such
policies and procedures as are reasonably calculated to assure on an on-going basis the following:
(i) all assets of the Borrower and the other Credit Parties and the operations conducted thereon
and other activities of the Borrower and the other Credit Parties are in compliance with
Environmental Laws, and (ii) no Hazardous Materials are disposed of or otherwise released on or to
any Properties owned by any such party in violation of any Environmental Laws, except to the extent
the non-compliance, disposal or release would not reasonably be expected to have a Material Adverse
Effect.

          (b) In connection with the acquisition or construction by any Credit Party of any Major Asset,
to the extent a Credit Party obtains (or may obtain upon request) or is provided the same, the
Borrower will, promptly following such Credit Party’s obtaining or being provided with the same,
deliver to the Administrative Agent all environmental reports and results of environmental reviews
(including Phase I environmental reports) of such Major Asset.

     Section 6.11 Establishment of Bank Accounts. From and after the Closing Date, so long
as this Agreement is in effect or any Lender Indebtedness (other than contingent indemnification
obligations and Cash Collateralized L/C Obligations) shall be outstanding, the Borrower agrees that
all deposit accounts (other than escrow accounts for sales and collateral accounts for the benefit
of regulatory authorities) of the Credit Parties shall be established and maintained with the
Administrative Agent or such other financial institution which has provided a depository control
agreement in accordance with the terms of the Guaranty and Collateral Agreement, executed by such
financial institution and the applicable Credit Party in accordance with the terms of the Guaranty
and Collateral Agreement. The Borrower hereby acknowledges and agrees that (a) the Borrower and
the other Credit Parties have granted a Lien on and pledged to the Administrative Agent as
additional collateral security for the Lender Indebtedness, all funds in such accounts, and (b)
such account and all funds on deposit therein shall be subject to the absolute dominion and control
of the Administrative Agent upon and during the continuance of an Event of Default.

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     Section 6.12 Information Regarding Collateral. The Borrower will furnish to the
Administrative Agent promptly, and in any event within thirty (30) days upon a Responsible Officer
of the General Partner becoming aware of the following changes, written notice of any change (a) in
any Credit Party’s legal name, (b) in the location of any Credit Party’s chief executive office or
its principal place of business, (c) in any Credit Party’s identity or organizational structure,
(d) in any Credit Party’s organizational number issued to it in its jurisdiction of organization,
and (e) in the location of the Collateral to any jurisdiction in which any registration of, or in
respect of, the Security Instruments may not be effective to protect the Lien created thereunder,
including, without limitation, information regarding the time of such relocation, the items being
relocated and the intended new locality of such items.

     Section 6.13 Pledge of Equity Interests in non-Credit Parties. Prior to any
Investment being considered a Permitted Investment pursuant to subsections (p) and
(q) of the definition of “Permitted Investment”, the Borrower or relevant Subsidiary (which
shall not be a Foreign Subsidiary), as applicable, will pledge all Equity Interests in the Person
into which the
Investment was or will be made which are owned by the Borrower or such Subsidiary (except
that, if such Person is a Foreign Entity, the Equity Interests of such Person to be pledged shall
be limited to 65% of the total combined voting power of all classes of voting Equity Interests of
such Person and 100% of all non-voting Equity Interests of such Person owned by the Borrower or
such Subsidiary) and shall execute and deliver to the Administrative Agent a Guaranty and
Collateral Agreement together with (a) all certificates (or other evidence acceptable to the
Administrative Agent) evidencing the issued and outstanding Equity Interests owned by the Borrower
or such Subsidiary (subject to the 65% and 100% limitations described above with respect to a
Foreign Entity) of any such Person of every class owned by the Borrower or such Subsidiary (as
applicable) which shall be duly endorsed or accompanied by stock powers executed in blank (as
applicable), and (b) such UCC 1 financing statements as the Administrative Agent shall deem
reasonably necessary or appropriate to grant, evidence and perfect the Liens required hereunder in
the issued and outstanding Equity Interests of each such Person.

ARTICLE VII

NEGATIVE COVENANTS

     Until the Commitments have expired or terminated and the principal of and interest on each
Loan and all fees payable hereunder have been paid in full, and all Letters of Credit shall have
expired or terminated and all L/C Obligations shall have been paid or reimbursed in full, the
Borrower covenants and agrees with the Lenders that:

     Section 7.01 Indebtedness. The Borrower will not, and will not permit any other
Credit Party to, create, incur, assume or permit to exist any Indebtedness, except:

          (a) the Lender Indebtedness;

          (b) Indebtedness existing on the date hereof and set forth in Schedule 7.01 and
extensions, renewals, refinancings and replacements of any such Indebtedness that do not increase
the outstanding principal amount thereof;

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          (c) Indebtedness of any Material Subsidiary (other than a Foreign Subsidiary) to the Borrower
or any other Material Subsidiary (other than a Foreign Subsidiary);

          (d) Guarantees by the Borrower or any Material Subsidiary of Indebtedness of any Material
Subsidiary so long as such Guarantee only guarantees not more than the percentage of such
Indebtedness that equals the percentage of equity owned directly or indirectly by the Borrower or
any Material Subsidiary, as applicable, in such Material Subsidiary at the time such Guarantee is
executed;

          (e) Indebtedness of the Borrower or any Material Subsidiary incurred to finance the
acquisition, construction or improvement of any fixed or capital assets, including Capital Lease
Obligations and any Indebtedness assumed in connection with the acquisition of any such assets or
secured by a Lien on any such assets prior to the acquisition thereof, and extensions, renewals,
refinancings and replacements of any such Indebtedness that do not increase the outstanding
principal amount thereof; provided that (i) such Indebtedness is incurred prior to
or within 90 days after such acquisition or the completion of such construction or improvement and
(ii) the aggregate principal amount of Indebtedness permitted by this Section 
7.01(e), together with the aggregate principal amount of the Non-Recourse Indebtedness
permitted by Section 7.01(f) below, shall not exceed $7,500,000 in the aggregate at any
time outstanding;

          (f) Non-Recourse Indebtedness not to exceed $1,000,000 in the aggregate at any time
outstanding;

          (g) Indebtedness of a Person which becomes a Credit Party after the date hereof,
provided that (i) such Indebtedness existed at the time such Person became a Credit Party
and was not created in anticipation thereof and (ii) immediately after giving effect to the
acquisition of such Person by the Borrower or a Credit Party, no Default or Event of Default shall
have occurred and be continuing; provided, further, that all Indebtedness incurred
under this clause (g), does not exceed U.S.$5,000,000 in the aggregate;

          (h) endorsements of negotiable instruments for collection in the ordinary course of business;

          (i) Indebtedness consisting of performance bonds or surety or appeal bonds provided by the
Borrower or any Credit Party in the ordinary course of business;

          (j) Indebtedness constituting Permitted Investments;

          (k) Indebtedness associated with worker’s compensation claims, unemployment insurance laws or
similar legislation incurred in the ordinary course of business;

          (l) Taxes, assessments or other governmental charges which are not yet due or are being
contested in good faith in accordance with Section 6.04;

          (m) Indebtedness outstanding from time to time under the Parent Subordinated Note, but not any
extensions (except as required by the terms of the Parent Subordinated Note),

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renewals,
refinancings or replacements thereof; provided, that all Indebtedness incurred under this
clause (m) does not exceed the aggregate amount set forth in Section 7.18(b);

          (n) Indebtedness pursuant to operating agreements (including the Omnibus Agreement),
processing agreements, contracts for the sale, transportation or exchange of oil, natural gas or
CO2 or other similar or customary agreements, transactions or arrangements entered into
in the ordinary course of business;

          (o) Indebtedness associated with any obligation for the payment of rent or other amounts under
any Operating Lease, whether directly or as a guarantor, in an aggregate amount not exceeding
$7,500,000 at any time outstanding;

          (p) the Purchase Debt; and

          (q) other Indebtedness in an aggregate principal amount not exceeding $7,500,000 at any time
outstanding.

     For the avoidance of doubt, to the extent any Indebtedness could be attributable to more than
one subsection of this Section 7.01, the Borrower or any other Credit Party may categorize
all or any portion of such Indebtedness to any one or more subsections of this Section 7.01
as it elects and unless as otherwise expressly provided, in no event shall the same portion of any
Indebtedness be deemed to utilize or be attributable to more than one subsection of this
Section 7.01.

     Section 7.02 Liens. The Borrower will not, and will not permit any other Credit Party
to, create, incur, assume or permit to exist any Lien on any property or asset now owned or
hereafter acquired by it, or assign or sell any income or revenues (including accounts receivable)
or rights in respect of any thereof, except Permitted Encumbrances.

     Section 7.03 Fundamental Changes.

          (a) The Borrower will not, and will not permit any other Credit Party to, merge into or
consolidate with any other Person, or permit any other Person to merge into or consolidate with it,
or sell, transfer, lease or otherwise dispose of (in one transaction or in a series of
transactions) all or substantially all of its assets (whether now owned or hereafter acquired), or
liquidate or dissolve, except that, if at the time thereof and immediately after giving effect
thereto no Event of Default shall have occurred and be continuing (i) any Person may merge into or
consolidate with the Borrower in a transaction in which the Borrower is the surviving entity, (ii)
any Person (other than the Borrower) may merge into or consolidate with any Credit Party in a
transaction in which the surviving entity is a Credit Party, (iii) any Credit Party may sell,
transfer, lease or otherwise dispose of its assets to the Borrower or to another Credit Party and
(iv) any Credit Party (other than the Borrower or a Credit Party that owns Mortgaged Properties)
may liquidate, dissolve or cease operations if the Borrower determines in good faith that such
liquidation, dissolution or cessation of operations is in the best interests of the Borrower and is
not materially disadvantageous to the Lenders.

          (b) The Borrower will not, and will not permit any other Credit Party to, engage in any
business other than Midstream Activities, businesses of the type conducted by the

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Credit Parties on
the date of execution of this Agreement and businesses reasonably related or complementary thereto.

     Section 7.04 Investments. The Borrower will not, and will not permit any other Credit
Party to, directly or indirectly, make or have outstanding any Investment, other than Permitted
Investments.

     Section 7.05 Restricted Payments. The Borrower will not, and will not permit any
other Credit Party to, declare or make, or agree to pay or make, directly or indirectly, any
Restricted Payment, except:

          (a) the Borrower may make the Closing Distributions on the Closing Date;

          (b) the Borrower may declare and pay dividends or make Distributions with respect to its
Equity Interests payable (i) solely in additional units or partnership interests of (or options or
warrants to acquire) its Equity Interests and (ii) in cash in lieu of fractional units or
partnership interests;

          (c) provided (i) no Event of Default then exists or would result therefrom, and (ii) the
Borrower shall be in compliance (after giving pro forma effect to the making of such Distribution)
with the provisions of Section 7.13 and Section 7.14 as of the end of the
immediately preceding Fiscal Quarter, the Borrower may make Distributions during any Fiscal Quarter
in accordance with the Limited Partnership Agreement in an amount not to exceed Available Cash as
of the end of the immediately preceding Fiscal Quarter;

          (d) any Credit Party may make Restricted Payments to the Borrower or any other Credit Party;

          (e) any Person in which the Borrower directly or indirectly owns Equity Interests may make
Distributions to the Borrower and/or other Persons owning Equity Interests in such Person, so long
as any such Distribution is in each case made to the Borrower and/or such other Persons ratably in
accordance with its Equity Interests of the same class or series therein;

          (f) the Borrower may purchase or otherwise acquire Equity Interests in any Person using
additional shares of its Equity Interests;

          (g) the Borrower or any Credit Party may make Restricted Payments pursuant to and in
accordance with equity incentive option plans or other benefit plans for management or employees of
the General Partner, the Borrower or any Subsidiary; and

          (h) provided (i) no Default or Event of Default then exists or would result therefrom, and
(ii) the Borrower shall be in compliance (after giving pro forma effect to the making of such
Distribution) with the provisions of Section 7.13 and Section 7.14 as of the end of
the immediately preceding Fiscal Quarter, the Borrower may make other Distributions in an aggregate
amount not to exceed $3,000,000 during any Fiscal Year.

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     Section 7.06 Transactions with Affiliates. The Borrower will not, and will not permit
any other Credit Party to, sell, lease or otherwise transfer any property or assets to, or
purchase, lease or otherwise acquire any property or assets from, or otherwise engage in any other
transactions with, any of its Affiliates, except (a) Permitted Investments, (b) such transactions
which are on material terms and conditions materially as favorable to the Borrower or such other
Credit Party as could be obtained in a comparable arm’s-length transaction with a Person that is
not an Affiliate, (c) transactions between or among the Borrower and its Subsidiaries, (d) any
Restricted Payment permitted by Section 7.05, (e) the Credit Parties may enter into, and
perform under, the Material Contracts, (f) the Closing Transactions, (g) the transactions
contemplated by the Closing Transaction Documents, (h) transactions undertaken in connection with
the IPO and described in the Registration Statement, (i) fees paid to members of the board of
directors (or similar governing body) of the Borrower or the General Partner, (j) compensation
arrangements for directors, officers and other employees of any of the Credit Parties or the
General Partner, (k) such other transactions as are otherwise permitted under this Agreement or any
other Loan Document and (l) transactions described in Schedule 7.06.

     Section 7.07 Negative Pledge Agreements. Subject to Sections 9.406 through 9.409 of
the UCC, the Borrower will not, nor will the Borrower permit any other Credit Party to,
create, assume or suffer to exist or enter into or become bound by any agreement (other than
this Agreement and the other Loan Documents or pursuant to agreements creating purchase money
security interests or governing Capital Lease Obligations, in each case to the extent the same are
permitted pursuant to the Loan Documents) that prohibits or otherwise restricts the right of the
Borrower or any other Credit Party to create, assume or suffer to exist any Lien on any of their
respective assets in favor of the Administrative Agent for the ratable benefit of Lenders;
provided, that, the foregoing shall not apply to restrictions and conditions
existing on the date hereof identified on Schedule 7.07 (but shall apply to any extension
or renewal of, or any amendment or modification expanding the scope of, any such restriction or
condition).

     Section 7.08 Sale and Leaseback Arrangements. The Borrower will not, and will not
permit any other Credit Party to, enter into any arrangement, directly or indirectly, with any
Person whereby any Credit Party shall sell or transfer any asset, whether now owned or hereafter
acquired, and whereby any Credit Party shall within 180 days after such sale rent or lease as
lessee such asset or any part thereof or other asset which any Credit Party intends to use for
substantially the same purpose or purposes as the asset sold or transferred.

     Section 7.09 ERISA Compliance. Except in such instances where an action, omission or
failure would not reasonably be expected to have a Material Adverse Effect, the Borrower will not,
nor will the Borrower permit any other Credit Party to, (a) take any action or fail to take any
action which would result in a violation of ERISA, the Code or other Governmental Rules applicable
to the Plans maintained or contributed to by it or any ERISA Affiliate, or (b) modify the terms of,
or the funding obligations or contribution requirements under any existing Plan, establish a new
Plan, or become obligated or incur any liability under a Plan that is not maintained or contributed
to by the Borrower or any ERISA Affiliate as of the Closing Date

     Section 7.10 Sale of Mortgaged Properties. The Borrower will not, and will not permit
any other Credit Party to, sell, assign, convey or otherwise transfer (in this section collectively
called “transfer”) any Mortgaged Property, any interest in any Mortgaged Property

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or any
other Collateral; provided, however, such restriction shall not apply to (a)
transfers of inventory or other assets in the ordinary course of business, (b) transfers of assets
which are obsolete, worn out or otherwise not necessary or useful in the Credit Party’s business or
that are replaced by other assets of comparable value and use, (c) transfers of Mortgaged Property
or other Collateral to the Borrower or any Credit Party, (d) transfers of Mortgaged Property or
other Collateral obtained as a result of mergers, consolidations or other transactions permitted
under this Agreement, (e) Asset Dispositions in accordance with this Agreement, the Net Cash
Proceeds of which are reinvested (whether through reparation, restoration or replacement of the
assets in issue), within the Reinvestment Period applicable to such Asset Disposition, in assets
useful in the Midstream Activities of the Credit Parties or otherwise applied to the reduction of
the Commitment in accordance with Section 2.10(c), (f) the transfer of any Pledging
Subsidiary’s Equity Interests to the Borrower or any other Credit Party, (g) transfers permitted by
Sections 7.03 or 7.05, (h) the Closing Transactions and transfers of assets
pursuant to, and in accordance with, the Contribution Agreement and the other Closing Transaction
Documents, (i) Permitted Investments and the transfer or disposition of cash (to the extent not
otherwise prohibited by the terms of the Loan Documents) or other Permitted Investments, or (j)
provided no Default or Event of Default then exists or would result therefrom, other Asset
Dispositions (which, for purposes of calculating compliance with the hereinafter
dollar limitations on Asset Dispositions, shall include any casualty or condemnation
proceeding relating to any Mortgaged Property), the fair market value of which does not (i) during
any Fiscal Year exceed $10,000,000 in the aggregate, or (ii) during the term of this Agreement
exceed $25,000,000 in the aggregate; provided, however, and without limiting the
foregoing, the Borrower will not, and will not permit any other Credit Party to, transfer any of
its or their accounts receivable other than (A) those accounts receivable deemed by the Borrower to
be doubtful or uncollectible, (B) discounts or accounts receivable granted to settle collection of
accounts receivable or (C) the transfer of defaulted accounts arising in the ordinary course of
business in connection with the compromise or collection thereof and not in connection with any
financing transaction. The Borrower shall pay all amounts as and when due under the terms of
Section 2.10(c) in connection with any Material Asset Disposition (including in connection
with any casualty or condemnation proceeding relating to any Mortgaged Property) to which
Section 2.10(c) is applicable. In the event of any transfer of assets permitted under this
Section 7.10, the Administrative Agent is authorized on behalf of the Lenders to release
and shall promptly release any Liens in favor of the Administrative Agent for the benefit of the
Lenders covering such assets upon the written request of the Borrower which specifically identifies
the subject assets and certifies that such transfer complies with the terms of this Section
7.10.

     Section 7.11 Proceeds of Loans. The Borrower will not permit the proceeds of the
Loans to be used for any purpose other than (a) to partially finance the Closing Distributions on
the Closing Date, (b) to finance the fees and expenses related to the Closing Transactions, (c) to
make the Restricted Payments in compliance with Section 7.05, (d) to fund the Credit
Parties’ working capital requirements, capital expenditures, permitted acquisitions and other
general partnership purposes, and (e) for the issuance of Letters of Credit. The Borrower will not
take, or permit any Person acting on behalf of the Borrower to take, any action which might cause
any of the Loan Documents to violate Regulation U or any other regulation of the Board. The
Borrower will not permit, nor will permit any other Credit Party to permit, the issuance of Letters
of Credit hereunder except to support the general business requirements and purposes of the Credit
Parties.

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     Section 7.12 Additional Subsidiaries. The Borrower will not, and will not permit any
other Credit Party to, create any additional Subsidiaries after the Closing Date, except if the
Borrower promptly notifies the Administrative Agent of the creation thereof.

     Section 7.13 Consolidated Interest Coverage Ratio. The Borrower will not permit the
Consolidated Interest Coverage Ratio on the last day of any Fiscal Quarter, commencing with the
Fiscal Quarter ending June 30, 2007, to be less than 2.50:1.00.

     Section 7.14 Consolidated Leverage Ratio. The Borrower will not permit the
Consolidated Leverage Ratio on the last day of any Fiscal Quarter, commencing with the Fiscal
Quarter ending June 30, 2007, to exceed the ratio for such period indicated below:

	 	 	 
	 	 	Consolidated
	Fiscal Quarter Ending	 	Leverage Ratio
	June 30, 2007
	 	5.25:1.00
	September 30, 2007
	 	5.25:1.00
	December 31, 2007
	 	5.00:1.00
	March 31, 2008
	 	5.00:1.00
	June 30, 2008
	 	4.75:1.00
	September 30, 2008
	 	4.75:1.00
	December 31, 2008 and each Fiscal Quarter thereafter
	 	4.50:1.00

; provided, that, during an Acquisition Period, the maximum Consolidated Leverage
Ratio shall be automatically increased by 0.50:1.00 from the otherwise applicable ratio set forth
in the grid above (for example, the Consolidated Leverage Ratio that would otherwise be 5.25:1.00
will become 5.75:1.00 during the Acquisition Period). At the end of such Acquisition Period, the
Consolidated Leverage Ratio will automatically revert to the ratio set forth above without any
further action necessary from the Administrative Agent, any Lender or the Borrower.
Notwithstanding anything to the contrary contained herein, and for the avoidance of doubt, any
failure by the Borrower to be in compliance with the requirements of this Section 7.14
shall not (and may not) be remedied by a change in the Consolidated Leverage Ratio upon the
election by the Borrower of an Acquisition Period.

     Section 7.15 Hedging Agreements. The Borrower will not, and will not permit any other
Credit Party to, enter into any Hedging Agreement, other than Hedging Agreements entered into in
the ordinary course of business to hedge or mitigate risks to which any Credit Party is exposed in
the conduct of its business or the management of its liabilities (or to unwind or offset previous
Hedging Agreements), provided, that, in no event shall:

          (a) Commodity Swap Agreements of the Borrower and its Subsidiaries cover net notional amounts
which exceed 80% of the Borrower’s share of the projected tailgate plant volumes during the tenor
of such Hedging Agreements; and

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          (b) Interest Rate Swap Agreements of the Borrower and its Subsidiaries cover net notional
amounts which exceed 100% of the Borrower’s and its Subsidiaries’ Indebtedness for borrowed money.

     Section 7.16 Acquisitions. The Borrower will not, and will not permit any other
Credit Party to, make any Acquisition (by purchase, merger or otherwise), except (a) Acquisitions
permitted under Section 7.03(a), (b) Acquisitions constituting Permitted Investments, (c)
Acquisitions made using Equity Interests of the Borrower and/or using the proceeds from the
contemporaneous sale or issuance of Equity Interests of the Borrower, (d) Acquisitions of the
Specified Assets, or (e) provided that no Event of Default exists or would reasonably be expected
to result from such Acquisition, and provided further that after giving effect to any such
Acquisition on a pro forma basis the Borrower would have been in compliance with Section
7.14, other Acquisitions useful in the Credit Parties’ Midstream Activities.

     Section 7.17 Amendments to Organizational and Other Documents. The Borrower will not,
and will not permit any other Credit Party to, enter into or permit any modification of, or waive
any material right or obligation of any Person under (a) its certificate or articles of
organization or formation, certificate of limited partnership, certificate or articles of
incorporation, bylaws, regulations, operating agreement, limited liability company agreement,
partnership agreement (including the Limited Partnership Agreement) or other organizational
documents other than amendments, modifications and waivers which would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect, (b) any Material Contract
(other than the Parent Subordinated Note) other than amendments, modifications and waivers which
would not, individually or in the aggregate, reasonably be expected to have a Material Adverse
Effect, or (c) the Parent Subordinated Note; provided, that, and subject to the last
sentence of this Section 7.17, the Borrower may enter into or obtain amendments,
modifications or waivers to or under the Parent Subordinated Note which do not provide for or have
any of the following effects: (i) cause the outstanding principal balance of the Indebtedness
evidenced by the Parent Subordinated Note to exceed $50,000,000 (plus any interest paid by
capitalizing the accrued and unpaid interest on the Parent Subordinated Note and adding it to the
then unpaid principal amount thereof in accordance with the terms of the Parent Subordinated Note)
(as reduced by any prepayments to the extent permitted by Section 7.18 or any other
principal payments made with the express written consent of the Required Lenders); (ii) increase
the amount of any scheduled payment of principal or interest on the Parent Subordinated Note; (iii)
shorten the maturity date or hasten or accelerate the date upon which any installment of principal
or interest on the Parent Subordinated Note is due or otherwise accelerate any amortization
schedule with respect thereto; (iv) increase the rate of interest payable in cash accruing on the
Parent Subordinated Note (other than any increase after and during the continuance of a Note Event
of Default (as defined in the Parent Subordinated Note) to a rate of interest not to exceed one
percent above the interest rate applicable to past due Eurodollar Loans or ABR Loans as provided in
Section 2.12(d), as applicable pursuant to the terms of the Parent Subordinated Note), or
impose any additional premium or penalty in connection with the prepayment or late payment of such
Parent Subordinated Note; (v) amend, modify or add any performance obligation of the Borrower
thereunder in a manner which is materially more onerous or restrictive to the Borrower; or (vi)
otherwise materially adversely affect the rights, privileges and protections of the Administrative
Agent and the Lenders contained herein and in the Parent Subordinated Note. Notwithstanding
anything to the contrary contained herein or in

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the Parent Subordinated Note, the Borrower may not
enter into or obtain amendments, modifications or waivers to or under the Parent Subordinated Note
with respect to (A) any subordination provision contained in the Parent Subordinated Note,
including, without limitation, Section 7 of the Parent Subordinated Note, or (B) any Note Event of
Default as defined in the Parent Subordinated Note, in each case without the prior written consent
of the Required Lenders.

     Section 7.18 Parent Subordinated Note. In addition to the other restrictions
contained in this Article VII, the Borrower will not, nor will the Borrower permit any
other Credit Party to, directly or indirectly, (a) except in accordance with the terms of the
Parent Subordinated Note, make any payment of principal or interest on the Parent Subordinated Note
at any time, or (b) permit the outstanding principal balance of the Indebtedness evidenced by the
Parent Subordinated Note to exceed $50,000,000 (plus any interest paid in kind added to such
principal amount) (as reduced by any prepayments to the extent expressly permitted by the terms of
the
Parent Subordinated Note or any other principal payments made with the express written consent
of the Required Lenders) at any time; provided, that, notwithstanding the
foregoing, the Borrower may at all times (i) pay interest on the Parent Subordinated Note by
capitalizing the accrued and unpaid interest on the Parent Subordinated Note and adding it to the
then unpaid principal amount thereof, and (ii) make payments or prepayments, in whole or in part,
with respect to the Parent Subordinated Note using Equity Interests of the Borrower and/or using
the proceeds from the contemporaneous sale or issuance of Equity Interests of the Borrower.

     Section 7.19 Supplemental Indenture. So long as and to the extent Section
10.20 is in effect pursuant to the terms of such Section 10.20, the Borrower will not,
nor will the Borrower permit any of its Subsidiaries to, at any time become or otherwise be
designated a “Restricted Subsidiary,” or any comparable term, under the Supplemental Indenture, or
any comparable term in any other documentation now or hereafter evidencing any Indebtedness of the
Parent.

ARTICLE VIII

EVENTS OF DEFAULT

     Section 8.01 Events of Default. If any of the following events (“Events of
Default”) shall occur:

          (a) the Borrower shall fail to pay any principal of any Loan when and as the same shall become
due and payable, whether at the due date thereof or, unless such prepayment obligation can be
revoked in accordance with the terms hereof, at a date fixed for prepayment thereof or otherwise;

          (b) the Borrower shall fail to pay any interest on any Loan, any reimbursement obligation in
respect of any L/C Obligations or any fee or any other amount (other than an amount referred to in
clause (a) above) payable under this Agreement or any other Loan Document, when and as the
same shall become due and payable, and such failure shall continue unremedied for a period of five
(5) days following the due date thereof;

          (c) any representation or warranty made or deemed made by or on behalf of any Credit Party in
or in connection with this Agreement or any other Loan Document or any

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amendment or modification
hereof or thereof or waiver hereunder or thereunder, or in any report, certificate, financial
statement or other document furnished pursuant to or in connection with this Agreement or any other
Loan Document or any amendment or modification hereof or thereof or waiver hereunder or thereunder,
shall prove to have been incorrect in any material respect when made or deemed made;

          (d) the Borrower shall fail to observe or perform any covenant, condition or agreement
contained in Section 6.03 (with respect to the Borrower’s legal existence), Section
6.05 (with respect to maintenance of insurance), Section 6.09(a) (with respect to
semi-annual delivery of Mortgages, as applicable) or in Article VII;

          (e) the Borrower shall fail to observe or perform any covenant, condition or agreement
contained in this Agreement (other than those specified in clauses (a), (b) or
(d) above), or any Credit Party that is party to a Loan Document shall fail to observe or
perform any covenant, condition or agreement contained in any other Loan Document, and, in each
case, such
failure shall continue unremedied for a period of 30 days after the earlier of (i) written
notice thereof from the Administrative Agent to the Borrower at the request of the Required
Lenders, or (ii) the date any Responsible Officer of the General Partner acquires knowledge
thereof;

          (f) any Credit Party shall fail to make any payment (whether of principal or interest and
regardless of amount) in respect of any Material Indebtedness (other than any Indebtedness
evidenced by the Parent Subordinated Note), when and as the same shall become due and payable or
within the grace period, if any, applicable thereto so long as such failure continues;

          (g) any event or condition occurs and is continuing that results in any Material Indebtedness
becoming due prior to its scheduled maturity or that enables or permits (with or without the giving
of notice, the lapse of time or both) the holder or holders of any Material Indebtedness or any
trustee or agent on its or their behalf to cause any Material Indebtedness to become due, or to
require the prepayment, repurchase, redemption or defeasance thereof, prior to its scheduled
maturity; provided, that, this clause (g) shall not apply to secured
Indebtedness that becomes due as a result of the voluntary sale or transfer of the property or
assets securing such Indebtedness;

          (h) an involuntary proceeding shall be commenced or an involuntary petition shall be filed
seeking (i) liquidation, reorganization or other relief in respect of any Credit Party or its
debts, or of a substantial part of its assets, under any Federal, state or foreign bankruptcy,
insolvency, receivership or similar law now or hereafter in effect or (ii) the appointment of a
receiver, trustee, custodian, sequestrator, conservator or similar official for any Credit Party or
for a substantial part of its assets, and, in any such case, such proceeding or petition shall
continue undismissed, undischarged, unbonded or unstayed for 60 days or an order or decree
approving or ordering any of the foregoing shall be entered;

          (i) any Credit Party shall (i) voluntarily commence any proceeding or file any petition
seeking liquidation, reorganization or other relief under any Federal, state or foreign bankruptcy,
insolvency, receivership or similar law now or hereafter in effect, (ii) consent to the institution
of, or fail to contest in a timely and appropriate manner, any proceeding or petition

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described in
clause (h), (iii) apply for or consent to the appointment of a receiver, trustee,
custodian, sequestrator, conservator or similar official for any Credit Party or for a substantial
part of its assets, (iv) file an answer admitting the material allegations of a petition filed
against it in any such proceeding, (v) make a general assignment for the benefit of creditors or
(vi) take any action for the purpose of effecting any of the foregoing;

          (j) one or more judgments that are not covered by insurance for the payment of money in an
aggregate amount in excess of $5,000,000 shall be rendered against the Borrower, any other Credit
Party or any combination thereof and the same shall remain undischarged for a period of 60
consecutive days during which execution shall not be effectively stayed, or any action shall be
legally taken by a judgment creditor to attach or levy upon any assets of any Credit Party to
enforce any such judgment;

          (k) a Change in Control shall occur;

          (l) (i) any default or event of default shall have occurred and be continuing under the
Gathering and Processing Agreement which has not been cured within any applicable grace or cure
period or waived, and which default or event of default would reasonably be expected to have a
Material Adverse Effect, or (ii) the Gathering and Processing Agreement shall have terminated and
no agreement (or agreements) with the Parent and/or any other Persons which are, in the
Administrative Agent’s reasonable determination, comparable in materiality and value shall have
been substituted or entered into in replacement thereof;

          (m) a “Note Event of Default” (as defined in the Parent Subordinated Note) shall have occurred
and be continuing under the Parent Subordinated Note which has not been cured within any applicable
grace or cure period or waived;

          (n) Parent (or any other holder of Indebtedness evidenced by the Parent Subordinated Note)
shall (i) default in the observance or performance of any obligation to be observed or performed by
Parent or such other holder under the Parent Subordinated Note, or (ii) repudiate the subordination
provisions contained in the Parent Subordinated Note or assert in writing that the subordination
provisions (or any of them) contained in the Parent Subordinated Note are not valid, binding and
enforceable against any such party;

          (o) any event occurs with respect to any Plan or Plans pursuant to which (i) any Credit Party
and/or any ERISA Affiliate incur a liability due and owing at the time of such event, without
existing funding therefor, for benefit payments under such Plan or Plans in excess of $5,000,000;
or (ii) any Credit Party, any ERISA Affiliate, or any other “party-in-interest” or “disqualified
person,” as such terms are defined in section 3(14) of ERISA and section 4975(e)(2) of the Code,
shall engage in transactions which in the aggregate would reasonably result in a direct or indirect
liability to any Credit Party or any ERISA Affiliate in excess of $5,000,000 under section 409 or
502 of ERISA or section 4975 of the Code; or

          (p) this Agreement or any other Loan Document shall cease to be in full force and effect or
shall be declared null and void or the validity or enforceability thereof shall be contested or
challenged by any Credit Party, or any Credit Party shall deny that it has any further liability or
obligation under any of the Loan Documents to which it is a party, or any Lien

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created by the Loan
Documents shall for any reason (other than the release thereof in accordance with the Loan
Documents) cease to be a valid, first priority, perfected Lien (subject to, with respect to
priority, Permitted Encumbrances) upon any of the Collateral purported to be covered thereby;

then, and in every such event (other than an event with respect to the Borrower described in
clauses (h) or (i) above), and at any time thereafter during the continuance of
such event, the Administrative Agent may, with the consent of the Required Lenders, and shall, at
the request of the Required Lenders, by notice to the Borrower, take any or all of the following
actions, at the same or different times: (i) terminate the Commitments, and thereupon the
Commitments shall terminate immediately, (ii) declare the Loans then outstanding to be due and
payable in whole (or in part, in which case any principal not so declared to be due and payable may
thereafter be declared to be due and payable), and thereupon the principal of the Loans so declared
to be due and payable, together with accrued interest thereon and all fees and other obligations of
the Borrower accrued hereunder, shall become due and payable immediately, without presentment,
demand, protest or other notice of any kind, all of which are hereby waived by the Borrower, and
(iii) exercise on behalf of itself, the Lenders and L/C Issuer all rights and remedies available to
it, the Lenders and L/C Issuer under the Loan Documents; provided, that, in case of any
event with respect to the Borrower described in clauses (h) or (i) above, the
Commitments shall automatically terminate and the principal of the Loans then outstanding, together
with accrued interest thereon and all fees and other obligations of the Borrower accrued hereunder,
shall automatically become due and payable, and the obligation of the Borrower to Cash
Collateralize the L/C Obligations as set forth in Section 2.06(g) shall automatically
become effective, in each case without presentment, demand, protest or other notice of any kind,
all of which are hereby waived by the Borrower.

     Section 8.02 Application of Funds. Upon the occurrence and during the continuance of
an Event of Default, after the exercise of remedies provided for in Section 8.01 (or after
the Loans have automatically become immediately due and payable and the L/C Obligations have
automatically been required to be Cash Collateralized as set forth in the proviso in the last
paragraph of Section 8.01), any amounts received on account of the Lender Indebtedness
shall be applied by the Administrative Agent in the following order, to the extent, in each case,
such amounts are then payable to the Person in issue in accordance with the Loan Documents:

     First, to payment of that portion of the Lender Indebtedness constituting fees,
indemnities, expenses and other amounts (including fees, charges and disbursements of counsel to
the Administrative Agent) payable to the Administrative Agent in its capacity as such;

     Second, to payment of that portion of the Lender Indebtedness constituting fees,
indemnities and other amounts (other than principal, interest and Letter of Credit Fees) payable to
the Lenders and the L/C Issuer (including fees, charges and disbursements of counsel to the
respective Lenders and the L/C Issuer), ratably among them in proportion to the respective amounts
described in this clause Second payable to them;

     Third, to payment of that portion of the Lender Indebtedness constituting accrued and
unpaid Letter of Credit Fees and interest on the Loans, L/C Borrowings and other Lender

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Indebtedness, ratably among the Lenders and the L/C Issuer in proportion to the respective amounts
described in this clause Third payable to them;

     Fourth, to payment of that portion of the Lender Indebtedness constituting unpaid
principal of the Loans and L/C Borrowings, ratably among the Lenders and the L/C Issuer in
proportion to the respective amounts described in this clause Fourth held by them;

     Fifth, to the Administrative Agent for the account of the L/C Issuer, to Cash
Collateralize that portion of L/C Obligations comprised of the aggregate undrawn amount of Letters
of Credit;

     Sixth, to payment of that portion of the Lender Indebtedness constituting obligations
and liabilities then due under Hedging Agreements with a Lender or a Secured Affiliate, ratably
among the Lenders and the Secured Affiliates in proportion to the respective amounts described in
this clause Sixth held by them; and

     Last, the balance, if any, after all of the Lender Indebtedness (other than contingent
indemnification obligations and Cash Collateralized L/C Obligations) has been indefeasibly paid in
full, to the Borrower or as otherwise required by applicable law.

Subject to Section 2.06(c), amounts used to Cash Collateralize the aggregate undrawn amount
of Letters of Credit pursuant to clause Fifth above shall be applied to satisfy drawings
under such Letters of Credit as they occur. If any amount remains on deposit as Cash Collateral
after all Letters of Credit have either been fully drawn or expired, such remaining amount shall be
applied to the other Lender Indebtedness, if any, in the order set forth above.

ARTICLE IX

THE AGENTS

     Section 9.01 Appointment and Authority. Each of the Lenders, L/C Issuer and the other
Agents hereby irrevocably appoints (a) Bank of America to act on its behalf as Administrative Agent
hereunder and under the other Loan Documents, (b) BNP Paribas to act on its behalf as Syndication
Agent hereunder and under the other Loan Documents, and (c) JPMorgan Chase Bank, N.A., The Royal
Bank of Scotland plc and Fortis Capital Corp. to act on its behalf as Co-Documentation Agents
hereunder and under the Loan Documents, and authorizes each such Agent to take such actions on its
behalf and to exercise such powers as are delegated to such Agent by the terms hereof or thereof,
together with such actions and powers as are reasonably incidental thereto. Except as provided in
the second sentence of Section 9.06, the provisions of this Article are solely for the
benefit of the Agents, the Lenders and L/C Issuer, and neither the Borrower nor any Subsidiary or
Affiliate thereof shall have rights as a third party beneficiary of any of such provisions.

     Section 9.02 Rights as a Lender. The Person serving as an Agent hereunder shall have
the same rights and powers in its capacity as a Lender as any other Lender and may exercise the
same as though it were not an Agent and the term “Lender” or “Lenders” shall, unless otherwise
expressly indicated or unless the context otherwise requires, include the Person serving as the
Administrative Agent, the Syndication Agent or Co-Documentation Agent (as applicable) hereunder in
its individual capacity. Such Person and its Affiliates may accept deposits from, lend money to,
act as the financial advisor or in any other advisory capacity for and generally

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engage in any kind
of business with the Borrower or any Subsidiary or other Affiliate thereof as if such Person were
not an Agent hereunder and without any duty to account therefor to Lenders.

     Section 9.03 Exculpatory Provisions. The Agents shall not have any duties or
obligations except those expressly set forth herein and in the other Loan Documents. Without
limiting the generality of the foregoing, the Agents:

          (a) shall not be subject to any fiduciary or other implied duties, regardless of whether a
Default has occurred and is continuing;

          (b) shall not have any duty to take any discretionary action or exercise any discretionary
powers, except discretionary rights and powers expressly contemplated hereby or by the other Loan
Documents that such Agent is required to exercise as directed in writing by the Required Lenders
(or such other number or percentage of Lenders as shall be expressly provided
for herein or in the other Loan Documents), provided that the Agents shall not be
required to take any action that, in its opinion or the opinion of its counsel, may expose the
Administrative Agent to liability or that is contrary to any Loan Document or applicable law; and

          (c) shall not, except as expressly set forth herein and in the other Loan Documents, have any
duty to disclose, and shall not be liable for the failure to disclose, any information relating to
the Borrower or any of its Affiliates that is communicated to or obtained by the Person serving as
an Agent or any of its Affiliates in any capacity.

The Agents shall not be liable for any action taken or not taken by it (i) with the consent or at
the request of the Required Lenders (or such other number or percentage of the Lenders as shall be
necessary, or as such Agent shall believe in good faith shall be necessary, under the circumstances
as provided in Article VIII and Section 10.02) or (ii) in the absence of its own
gross negligence or willful misconduct. The Administrative Agent shall be deemed not to have
knowledge of any Default unless and until notice describing such Default is given to the
Administrative Agent by the Borrower, a Lender or L/C Issuer.

     The Agents shall not be responsible for or have any duty to ascertain or inquire into (A) any
statement, warranty or representation made in or in connection with this Agreement or any other
Loan Document, (B) the contents of any certificate, report or other document delivered hereunder or
thereunder or in connection herewith or therewith, (C) the performance or observance of any of the
covenants, agreements or other terms or conditions set forth herein or therein or the occurrence of
any Default, (D) the validity, enforceability, effectiveness or genuineness of this Agreement, any
other Loan Document or any other agreement, instrument or document or (E) the satisfaction of any
condition set forth in Article IV or elsewhere herein, other than the Administrative
Agent’s confirmation of receipt of items expressly required to be delivered to the Administrative
Agent.

     Section 9.04 Reliance by the Agents. Each Agent shall be entitled to rely upon, and
shall not incur any liability for relying upon, any notice, request, certificate, consent,
statement, instrument, document or other writing (including any electronic message, Internet or
intranet website posting or other distribution) believed by it to be genuine and to have been
signed, sent or otherwise authenticated by the proper Person. Each Agent also may rely upon any
statement

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made to it orally or by telephone and believed by it to have been made by the proper
Person, and shall not incur any liability for relying thereon. In determining compliance with any
condition hereunder to the making of a Loan, or the issuance of a Letter of Credit, that by its
terms must be fulfilled to the satisfaction of a Lender or L/C Issuer, the Administrative Agent may
presume that such condition is satisfactory to such Lender or L/C Issuer unless the Administrative
Agent shall have received notice to the contrary from such Lender or L/C Issuer prior to the making
of such Loan or the issuance of such Letter of Credit. Agent may consult with legal counsel (who
may be counsel for Borrower), independent accountants and other experts selected by it, and shall
not be liable for any action taken or not taken by it in accordance with the advice of any such
counsel, accountants or experts.

     Section 9.05 Delegation of Duties. The Agents may perform any and all of their duties
and exercise their rights and powers hereunder or under any other Loan Document by or through any
one or more sub-agents appointed by such Agent. The Agents and any such sub-agent may
perform any and all of their duties and exercise their rights and powers by or through their
respective Related Parties. The exculpatory provisions of this Article shall apply to any such
sub-agent and to the Related Parties of the Agents (including, without limitation, BAS and BNPPSC)
and any such sub-agent, and shall apply to their respective activities in connection with the
syndication of the credit facilities provided for herein as well as activities as the
Administrative Agent, the Syndication Agent or a Co-Documentation Agent, as applicable.

     Section 9.06 Resignation of the Administrative Agent. The Administrative Agent may at
any time give notice of its resignation to the Lenders, L/C Issuer and the Borrower. Upon receipt
of any such notice of resignation, the Required Lenders shall have the right, in consultation with
the Borrower (and, provided no Event of Default has occurred that is then continuing, with the
consent of the Borrower, such consent not to be unreasonably withheld or delayed), to appoint a
successor, which shall be a commercial bank organized under the laws of the United States with an
office in the United States having combined capital and surplus of at least $100,000,000, or an
Affiliate of any such bank with an office in the United States. If no such successor shall have
been so appointed by the Required Lenders with such consent of the Borrower (unless an Event of
Default has occurred and is continuing), and shall have accepted such appointment within 30 days
after the retiring Administrative Agent gives notice of its resignation, then the retiring
Administrative Agent may, on behalf of the Lenders and L/C Issuer, appoint a successor
Administrative Agent meeting the qualifications set forth above; provided that if the
Administrative Agent shall notify the Borrower and the Lenders that no qualifying Person has
accepted such appointment, then such resignation shall nonetheless become effective in accordance
with such notice and (a) the retiring Administrative Agent shall be discharged from its duties and
obligations hereunder and under the other Loan Documents (except that in the case of any collateral
security held by the Administrative Agent on behalf of the Lenders or L/C Issuer under any of the
Loan Documents, the retiring Administrative Agent shall continue to hold such collateral security
until such time as a successor Administrative Agent is appointed) and (b) all payments,
communications and determinations provided to be made by, to or through the Administrative Agent
shall instead be made by or to each Lender and L/C Issuer directly, until such time as the Required
Lenders (with, as applicable, the consent of the Borrower as provided herein) appoint a successor
Administrative Agent as provided for above in this Section. Upon the acceptance of a successor’s
appointment as Administrative Agent hereunder, such successor shall succeed to and become vested
with all of the rights, powers, privileges and duties

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of the retiring (or retired) Administrative
Agent, and the retiring Administrative Agent shall be discharged from all of its duties and
obligations hereunder or under the other Loan Documents (if not already discharged therefrom as
provided above in this Section). The fees payable by the Borrower to a successor Administrative
Agent shall be the same as those payable to its predecessor unless otherwise agreed between the
Borrower and such successor. After the retiring Administrative Agent’s resignation hereunder and
under the other Loan Documents, the provisions of this Article and Section 10.03 shall
continue in effect for the benefit of such retiring Administrative Agent, its sub-agents and their
respective Related Parties in respect of any actions taken or omitted to be taken by any of them
while the retiring Administrative Agent was acting as Administrative Agent.

     Any resignation by Bank of America as Administrative Agent pursuant to this Section shall also
constitute its resignation as L/C Issuer. Upon the acceptance of a successor’s appointment as
Administrative Agent hereunder, (i) such successor shall succeed to and become
vested with all of the rights, powers, privileges and duties of the retiring L/C Issuer, (ii)
the retiring L/C Issuer shall be discharged from all of its duties and obligations hereunder or
under the other Loan Documents, and (iii) the successor L/C Issuer shall issue letters of credit in
substitution for the Letters of Credit, if any, outstanding at the time of such succession or make
other arrangements satisfactory to the retiring L/C Issuer to effectively assume the obligations of
the retiring L/C Issuer with respect to such Letters of Credit.

     Section 9.07 Non-Reliance on the Agents and Other Lenders. Each Lender and L/C Issuer
acknowledges that it has, independently and without reliance upon any Agent or any other Lender or
any of their Related Parties and based on such documents and information as it has deemed
appropriate, made its own credit analysis and decision to enter into this Agreement. Each Lender
and L/C Issuer also acknowledges that it will, independently and without reliance upon any Agent or
any other Lender or any of their Related Parties and based on such documents and information as it
shall from time to time deem appropriate, continue to make its own decisions in taking or not
taking action under or based upon this Agreement, any other Loan Document or any related agreement
or any document furnished hereunder or thereunder.

     Section 9.08 No Other Duties, Etc. Except as set forth in Section 10.12,
anything herein to the contrary notwithstanding, none of the Arrangers, the Syndication Agent, the
Co-Documentation Agents nor any other Person (as applicable) now or hereafter appointed as
syndication agent or documentation agent hereunder shall have any powers, duties or
responsibilities under this Agreement or any of the other Loan Documents.

     Section 9.09 Administrative Agent May File Proofs of Claim. In case of the pendency
of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment,
composition or other similar judicial proceeding relative to any Credit Party, the Administrative
Agent (irrespective of whether the principal of any Loan or L/C Obligation shall then be due and
payable as herein expressed or by declaration or otherwise and irrespective of whether the
Administrative Agent shall have made any demand on the Borrower) shall be entitled and empowered,
by intervention in such proceeding or otherwise:

          (a) to file and prove a claim for the whole amount of the principal and interest owing and
unpaid in respect of the Loans, L/C Obligations and all other Lender Indebtedness

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(other than
Indebtedness evidenced by Hedging Agreements) that are owing and unpaid and to file such other
documents as may be necessary or advisable in order to have the claims of the Lenders, L/C Issuer
and the Administrative Agent (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Lenders, L/C Issuer and the Administrative Agent and their
respective agents and counsel and all other amounts due the Lenders, L/C Issuer and the
Administrative Agent under Section 2.06(i), Section 2.06(j), Section 2.11
and Section 10.03) allowed in such judicial proceeding; and

          (b) to collect and receive any monies or other property payable or deliverable on any such
claims and to distribute the same;

     and any custodian, receiver, assignee, trustee, liquidator, sequestrator or other similar
official in any such judicial proceeding is hereby authorized by each Lender and L/C Issuer to make
such payments to the Administrative Agent and, in the event that the Administrative Agent
shall consent to the making of such payments directly to the Lenders and L/C Issuer, to pay to
the Administrative Agent any amount due for the reasonable compensation, expenses, disbursements
and advances of the Administrative Agent and its agents and counsel, and any other amounts due the
Administrative Agent under Section 2.11 and Section 10.03.

     Nothing contained herein shall be deemed to authorize the Administrative Agent to authorize or
consent to or accept or adopt on behalf of any Lender or L/C Issuer any plan of reorganization,
arrangement, adjustment or composition affecting the Lender Indebtedness or the rights of any
Lender or to authorize the Administrative Agent to vote in respect of the claim of any Lender in
any such proceeding.

     Section 9.10 Collateral and Guaranty Matters. The Lenders and L/C Issuer irrevocably
authorize the Administrative Agent, at its option and in its discretion:

          (a) to release any Lien on any property granted to or held by the Administrative Agent under
any Loan Document (i) upon termination of the Total Commitment and payment in full of all Lender
Indebtedness (other than contingent indemnification obligations and Cash Collateralized L/C
Obligations) and the expiration, termination or Cash Collateralization of all outstanding Letters
of Credit, (ii) that is sold or to be sold as part of or in connection with any sale permitted
hereunder or under any other Loan Document, or (iii) if approved, authorized or ratified in writing
by the Required Lenders (provided, that, the consent of all Lenders shall be
required for the release of all or substantially all of the Collateral); and

          (b) to release any Material Subsidiary from its obligations under its applicable Security
Instruments if such Person ceases to be a Material Subsidiary as a result of a transaction or
designation permitted hereunder.

     Upon request by the Administrative Agent at any time, the Lenders will confirm in writing the
Administrative Agent’s authority to release its interest in particular types or items of property,
or to release any Subsidiary from its obligations under the applicable Security Instruments,
pursuant to this Section 9.10.

          Section 9.11 Execution of Security Instruments. Without limiting the powers and
authority of the Administrative Agent described herein, the Lenders hereby empower and

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authorize
the Administrative Agent to execute and deliver to the Borrower on their behalf the Mortgages, the
Guaranty and Collateral Agreement, and any other Security Instruments or other agreements,
documents or instruments as shall be necessary or appropriate to effect the purposes of the
foregoing instruments, including any and all releases of the foregoing reasonably requested by the
Borrower in connection with transactions permitted pursuant to this Agreement.

ARTICLE X

MISCELLANEOUS

     Section 10.01 Notices; Electronic Communication. (a) Except in the case of notices
and other communications expressly permitted to be given by telephone (and except as provided in
Section 10.01(b) below), all notices and other communications provided for herein shall be
in writing and shall be delivered by hand or overnight courier service, mailed by certified or
registered mail or sent by telecopy or electronic mail (e-mail) (to the extent an e-mail
address is provided), as follows:

               (i) if to the Borrower, to Quicksilver Gas Services LP, c/o Quicksilver Gas Services GP
LLC, 777 West Rosedale Street, Suite 300, Fort Worth, Texas 76104, Attention: MarLu Hiller
(Fax No. 817-665-5016, Electronic Mail (E-mail): MHiller@qrinc.com);

               (ii) if to the Administrative Agent, to Bank of America, N.A., 901 Main Street, Mail
Code: TX1-492-14, Dallas, Texas 75202-3714, Attention: Renita M. Cummings (Fax No.
214-290-8371, Electronic Mail (E-mail): renita.m.cummings@bankofamerica.com, with a copy to
Bank of America, N.A., 700 Louisiana Street, 8th Floor, TX4-213-08-14, Houston,
Texas 77002, Attention: Ronald E. McKaig (Fax No. 713-247-7286, Electronic Mail (E-mail):
ronald.e.mckaig@bankofamerica.com;

               (iii) if to L/C Issuer, to Bank of America, N.A., 1000 West Temple Street,
7th Floor, Mail Code: CA9-705-07-05, Los Angeles, California 90012-1514,
Attention: Sandra Leon (Fax No. 213-580-8440), Electronic Mail (E-mail):
sandra.leon@bankofamerica.com; and

               (iv) if to any other Agent or Lender (including the Swingline Lender), to it at its
address (or telecopy number or electronic mail address) set forth in its Administrative
Questionnaire (which addresses the Administrative Agent will promptly furnish to the
Borrower upon receipt of same).

          (b) Notices and other communications to any Agent, the Lenders (including the Swingline
Lender) and L/C Issuer hereunder may be delivered or furnished by electronic communication
(including e-mail and Internet or intranet websites); provided that the foregoing shall not
apply to notices to any Lender pursuant to Article II if such Lender has notified the
Administrative Agent (which shall promptly notify the Borrower) that it is incapable of receiving
notices under such Article by electronic communication. The Borrower may, in its discretion, agree
to accept notices and other communications to it hereunder by electronic communications

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pursuant to
procedures approved by it, provided that approval of such procedures may be limited to
particular notices or communications.

          Unless the Administrative Agent otherwise prescribes, (i) notices and other communications
sent to an e-mail address shall be deemed received upon the sender’s receipt of an acknowledgement
from the intended recipient (such as by the “return receipt requested” function, as available,
return e-mail or other written acknowledgement), provided that if such notice or other
communication is not sent during the normal business hours of the recipient, such notice or
communication shall be deemed to have been sent at the opening of business on the next Business Day
for the recipient, and (ii) notices or communications posted to an Internet or intranet website
shall be deemed received upon the deemed receipt by the intended recipient at its e-mail address as
described in the foregoing clause (i) of notification that such notice or communication is
available and identifying the website address therefor.

          Notwithstanding anything to the contrary contained in any Loan Document, all notices,
elections, approvals, requests and other actions required or permitted to be made by the Borrower
under any Loan Document shall only be executed, delivered, given or made by a Responsible Officer
of the General Partner on behalf of the Borrower.

          Any party hereto may change its address, telecopy number or electronic mail address for
notices and other communications hereunder by written notice to the other parties hereto. All
notices and other communications given to any party hereto in accordance with the provisions of
this Agreement shall be deemed to have been given on the date of receipt.

     Section 10.02 Waivers; Amendments.

          (a) No failure or delay by the Administrative Agent, L/C Issuer or any Lender in exercising
any right or power hereunder shall operate as a waiver thereof, nor shall any single or partial
exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such
a right or power, preclude any other or further exercise thereof or the exercise of any other right
or power. The rights and remedies of the Administrative Agent, L/C Issuer and the Lenders
hereunder are cumulative and are not exclusive of any rights or remedies that they would otherwise
have. No waiver of any provision of any Loan Document or consent to any departure by any Credit
Party therefrom shall in any event be effective unless the same shall be permitted by Section
10.02(b), and then such waiver or consent shall be effective only in the specific instance and
for the purpose for which given. Without limiting the generality of the foregoing, the making of a
Loan or issuance of a Letter of Credit shall not be construed as a waiver of any Default,
regardless of whether the Administrative Agent, any Lender or L/C Issuer may have had notice or
knowledge of such Default at the time.

          (b) Neither this Agreement nor any of the other Loan Documents nor any provision hereof or
thereof may be waived, amended or modified except, in the case of this Agreement, pursuant to an
agreement or agreements in writing entered into by the Borrower and the Required Lenders or by the
Borrower and the Administrative Agent with the consent of the Required Lenders, or, in the case of
any other Loan Document, pursuant to an agreement or agreements in writing entered into by the
relevant Credit Parties thereto and the Required Lenders or by the relevant Credit Parties thereto
and the Administrative Agent with the consent

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of the Required Lenders; provided,
that, no such agreement shall (i) increase the Commitment of any Lender without the written
consent of such Lender, (ii) reduce, or otherwise release the Borrower from its obligation to pay,
the principal amount of any Loan or L/C Obligation or reduce the rate of interest thereon, or
reduce any fees payable hereunder, without the written consent of each Lender affected thereby,
(iii) postpone the scheduled date of payment of the principal amount of any Loan or L/C Obligation,
or any interest thereon, or any fees payable hereunder, or reduce the amount of, waive or excuse
any such payment, or postpone the Maturity Date, without the written consent of each Lender
affected thereby, (iv) change Section 2.18(b) or Section 2.18(c) in a manner that
would alter the pro rata sharing of payments required thereby, without the written consent of each
Lender, (v) amend, modify or waive any L/C Obligation without the written consent of L/C Issuer,
(vi) change any of the provisions of this Section 10.02, Section 2.10 or the
definition of “Required Lenders” or any other provision of any Loan Document specifying the number
or percentage of Lenders required to waive, amend or modify any rights of the Lenders thereunder or
make any determination or grant any consent thereunder,
without the written consent of each Lender, (vii) release any Credit Party from the Guaranty
and Collateral Agreement (except as expressly provided in the Guaranty and Collateral Agreement or
herein), or limit its liability thereunder, without the written consent of each Lender, or (viii)
except as provided herein or in the Security Instruments, release all or any part of the Collateral
from the Liens of the Security Instruments, without the written consent of each Lender;
provided further that no such agreement shall amend, waive, modify or otherwise
affect the rights or duties of any Agent, L/C Issuer or the Swingline Lender without the prior
written consent of such Agent, L/C Issuer or Swingline Lender, as the case may be; and
provided further that, without limiting the provisions of Section 7.10 or
Section 9.10, the Administrative Agent shall have the right to execute and deliver any
release of the Guaranty and Collateral Agreement or any Lien (or other similar instrument) without
the consent of any Lender to the extent permitted by this Agreement or the other Loan Documents, or
as otherwise required as a result of any Subsidiary ceasing to be a Material Subsidiary.

     Section 10.03 Expenses; Indemnity; Damage Waiver.

          (a) The Borrower shall pay (i) all legal, printing, recording, syndication, travel,
advertising and other reasonable and substantiated out-of-pocket expenses incurred by the
Administrative Agent and the Arrangers, including the reasonable and substantiated fees, charges
and disbursements of one (1) outside counsel and applicable local counsel for the Administrative
Agent and the Arrangers, in connection with the syndication of the credit facilities provided for
herein, the preparation, execution, delivery and administration of this Agreement, the Loan
Documents and each other document or instrument relevant to this Agreement or the Loan Documents
and any amendments, modifications or waivers of the provisions hereof or thereof (whether or not
the transactions contemplated hereby or thereby shall be consummated), (ii) all reasonable
out-of-pocket expenses incurred by L/C Issuer in connection with the issuance, amendment, renewal
or extension of any Letter of Credit or any demand for payment thereunder, (iii) the filing,
recording, refiling or rerecording of the Mortgages, the Guaranty and Collateral Agreements and any
other Security Instruments and/or any UCC financing statements relating thereto and all amendments,
supplements and modifications to, and all releases and terminations of, any thereof and any and all
other documents or instruments of further assurance required to be filed or recorded or refiled or
rerecorded by the terms hereof or of the Mortgages, the Guaranty and Collateral Agreements and any
other Security Instruments, and (iv) all reasonable

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and substantiated out-of-pocket expenses
incurred by the Agents, L/C Issuer or any Lender, including the fees, charges and disbursements of
any counsel for the Agents, L/C Issuer or any Lender, reasonably incurred in connection with the
enforcement or protection of its rights in connection with the Loan Documents, including its rights
under this Section, or in connection with the Loans made or Letters of Credit issued hereunder,
including all such reasonable and substantiated out-of-pocket expenses reasonably incurred during
any workout, restructuring or negotiations in respect of such Loans or Letters of Credit.

          (b)
EXCEPT TO THE EXTENT REIMBURSEMENT OF EXPENSES IS LIMITED BY SECTION 10.03(a) TO
REIMBURSEMENT OF EXPENSES OF ONLY CERTAIN PARTIES, THE BORROWER SHALL INDEMNIFY THE AGENTS, L/C
ISSUER, THE ARRANGERS AND EACH LENDER, AND EACH RELATED PARTY OF ANY OF THE FOREGOING PERSONS (EACH
SUCH PERSON BEING CALLED AN “INDEMNITEE”) AGAINST, AND HOLD EACH INDEMNITEE
HARMLESS FROM, ANY AND ALL LOSSES, CLAIMS, DAMAGES, LIABILITIES AND RELATED EXPENSES,
INCLUDING THE REASONABLE OUT-OF-POCKET FEES, CHARGES AND DISBURSEMENTS OF ANY COUNSEL FOR ANY
INDEMNITEE, INCURRED BY OR ASSERTED AGAINST ANY INDEMNITEE ARISING OUT OF, IN CONNECTION WITH, OR
AS A RESULT OF (i) THE EXECUTION OR DELIVERY OF ANY LOAN DOCUMENT OR ANY OTHER AGREEMENT OR
INSTRUMENT CONTEMPLATED HEREBY, THE PERFORMANCE BY THE PARTIES TO THE LOAN DOCUMENTS OF THEIR
RESPECTIVE OBLIGATIONS THEREUNDER OR THE CONSUMMATION OF THE FINANCING TRANSACTIONS OR ANY OTHER
TRANSACTIONS CONTEMPLATED HEREBY, (ii) ANY LOAN OR LETTER OF CREDIT OR THE USE OF THE PROCEEDS
THEREFROM (INCLUDING ANY REFUSAL BY L/C ISSUER TO HONOR A DEMAND FOR PAYMENT UNDER A LETTER OF
CREDIT IF THE DOCUMENTS PRESENTED IN CONNECTION WITH SUCH DEMAND DO NOT STRICTLY COMPLY WITH THE
TERMS OF SUCH LETTER OF CREDIT), (iii) ANY ACTUAL OR ALLEGED PRESENCE OR RELEASE OF HAZARDOUS
MATERIALS ON OR FROM ANY PROPERTY CURRENTLY OR FORMERLY OWNED OR OPERATED BY THE BORROWER OR ANY OF
ITS SUBSIDIARIES, OR ANY ENVIRONMENTAL LIABILITY RELATED IN ANY WAY TO THE BORROWER OR ANY OF ITS
SUBSIDIARIES, OR (iv) ANY ACTUAL OR PROSPECTIVE CLAIM, LITIGATION, INVESTIGATION OR PROCEEDING
RELATING TO ANY OF THE FOREGOING, WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY AND
REGARDLESS OF WHETHER ANY INDEMNITEE IS A PARTY THERETO; PROVIDED THAT SUCH INDEMNITY AND
RELEASE SHALL NOT, AS TO ANY INDEMNITEE, BE AVAILABLE TO THE EXTENT THAT SUCH LOSSES, CLAIMS,
DAMAGES, LIABILITIES OR RELATED EXPENSES (A) ARE DETERMINED BY A COURT OF COMPETENT JURISDICTION BY
FINAL AND NONAPPEALABLE JUDGMENT TO HAVE RESULTED FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT
OF SUCH INDEMNITEE (IT BEING UNDERSTOOD THAT IT IS THE INTENTION OF THE PARTIES HERETO THAT
EACH OF THE INDEMNITEES BE INDEMNIFIED IN THE CASE OF ITS OWN NEGLIGENCE (OTHER THAN GROSS
NEGLIGENCE), REGARDLESS OF WHETHER SUCH NEGLIGENCE IS SOLE OR CONTRIBUTORY, ACTIVE OR PASSIVE,
IMPUTED, JOINT OR TECHNICAL), (B) RELATE TO CLAIMS BETWEEN OR AMONG ANY OF

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THE LENDERS, THE
AGENTS, THE ARRANGERS OR ANY OF THEIR AFFILIATES, SHAREHOLDERS, PARTNERS OR MEMBERS, OR (C) ARE IN
RESPECT OF ANY PROPERTY FOR ANY OCCURRENCE ARISING FROM THE ACTS OR OMISSIONS OF ANY AGENT OR ANY
LENDER DURING THE PERIOD AFTER WHICH SUCH PERSON, ITS SUCCESSORS OR ASSIGNS SHALL HAVE OBTAINED
POSSESSION OF SUCH PROPERTY (WHETHER BY FORECLOSURE OR DEED IN LIEU OF FORECLOSURE, AS
MORTGAGEE-IN-POSSESSION OR OTHERWISE).

          (c) To the extent that the Borrower fails to pay any amount required to be paid by the
Borrower to the Administrative Agent, L/C Issuer or the Swingline Lender under Section
10.03(a) or Section 10.03(b), each Lender severally agrees to pay to the Administrative
Agent, L/C Issuer or the Swingline Lender, as the case may be, such Lender’s Applicable Percentage
(determined as of the time that the applicable unreimbursed expense or indemnity payment is
sought) of such unpaid amount; provided, that, the unreimbursed expense or
indemnified loss, claim, damage, liability or related expense, as the case may be, was incurred by
or asserted against the Administrative Agent, L/C Issuer or the Swingline Lender, as the case may
be, in its capacity as such.

          (d) To the extent permitted by applicable law, no party hereto shall assert, and each party
hereto hereby waives, any claim against any other party, on any theory of liability, for special,
indirect, consequential or punitive damages (as opposed to direct or actual damages) arising out
of, in connection with, or as a result of, this Agreement or any agreement or instrument
contemplated hereby, the Financing Transactions, any Loan or Letter of Credit or the use of the
proceeds thereof.

          (e) All amounts due under this Section 10.03 shall be payable not later than thirty
(30) days after written demand is received by the Borrower therefor.

     Section 10.04 Successors and Assigns.

          (a) The provisions of this Agreement 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 L/C Issuer that issues a Letter of Credit), except that the Borrower may not assign or
otherwise transfer any of its rights or obligations hereunder without the prior written consent of
the Administrative Agent, L/C Issuer and each Lender (and any attempted assignment or transfer by
the Borrower without such consent shall be null and void). Nothing in this Agreement, expressed or
implied, shall be construed to confer upon any Person (other than the parties hereto, their
respective successors and assigns permitted hereby (including any Affiliate of L/C Issuer that
issues a Letter of Credit) and, to the extent expressly contemplated hereby, the Related Parties of
each of the Administrative Agent, L/C Issuer and the Lenders) any legal or equitable right, remedy
or claim under or by reason of this Agreement.

          (b) Any Lender may at any time assign to one or more Eligible Assignees all or a portion of
its rights and obligations under this Agreement (including all or a portion of its Commitment and
the Loans at the time owing to it); provided that

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          (i) except in the case of an assignment of the entire remaining amount of the assigning
Lender’s Commitment and the Loans at the time owing to it or in the case of an assignment to
a Lender or an Affiliate of a Lender or an Approved Fund with respect to a Lender, the
aggregate amount of the Commitment (which for this purpose includes Loans outstanding
thereunder) or, if the Commitment is not then in effect, the principal outstanding balance
of the Loans of the assigning Lender subject to each such assignment, determined as of the
date the Assignment and Acceptance with respect to such assignment is delivered to the
Administrative Agent or, if “Trade Date” is specified in the Assignment and Acceptance, as
of the Trade Date, shall not be less than $5,000,000 unless each of the Administrative Agent
and, so long as no Event of Default has occurred and is continuing, the Borrower otherwise
consents (each such consent not to be unreasonably withheld, conditioned or delayed);
provided, however, that concurrent assignments to members of an Assignee
Group and concurrent assignments from
members of an Assignee Group to a single Eligible Assignee (or to an Eligible Assignee
and members of its Assignee Group) will be treated as a single assignment for purposes of
determining whether such minimum amount has been met;

          (ii) after giving effect to any assignment pursuant to clause (i) above, the
assigning Lender shall have a Commitment of not less than $5,000,000 unless each of the
Administrative Agent and, so long as no Event of Default has occurred and is continuing, the
Borrower otherwise consents (each such consent not to be unreasonably withheld, conditioned
or delayed);

          (iii) each partial assignment shall be made as an assignment of a proportionate part of
all the assigning Lender’s rights and obligations under this Agreement with respect to the
Loans or the Commitment assigned;

          (iv) any assignment of a Commitment must be approved by the Administrative Agent and
L/C Issuer and, so long as no Event of Default has occurred and is continuing, the Borrower
(which consent of the Borrower shall not be unreasonably withheld, conditioned or delayed)
unless the Person that is the proposed assignee is itself a Lender (whether or not the
proposed assignee would otherwise qualify as an Eligible Assignee); and

          (v) the parties to each assignment shall execute and deliver to the Administrative
Agent an Assignment and Acceptance, together with a processing and recordation fee in the
amount of $3,500; provided, however, that the Administrative Agent may, in
its sole discretion, elect to waive such processing and recordation fee in the case of any
assignment. The Eligible Assignee, if it shall not be a Lender, shall deliver to
Administrative Agent an Administrative Questionnaire (a copy of which shall promptly be
provided to the Borrower).

     Subject to acceptance and recording thereof by the Administrative Agent pursuant to subsection
(d) of this Section, from and after the effective date specified in each Assignment and
Acceptance, the Eligible Assignee thereunder shall be a party to this Agreement and, to the extent
of the interest assigned by such Assignment and Acceptance, have the rights and obligations of a
Lender under this Agreement and the other Loan Documents, and the assigning

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Lender thereunder
shall, to the extent of the interest assigned by such Assignment and Acceptance, be released from
its obligations under this Agreement and the other Loan Documents (and, in the case of an
Assignment and Acceptance covering all of the assigning Lender’s rights and obligations under this
Agreement, such Lender shall cease to be a party hereto) but shall continue to be entitled to the
benefits of Section 2.15, Section 2.17 and Section 10.03 with respect to
facts and circumstances occurring prior to the effective date of such assignment. Upon request,
the Borrower (at its expense) shall execute and deliver an applicable Note and/or Notes to the
assignee Lender. Any assignment or transfer by a Lender of rights or obligations under this
Agreement that does not comply with this subsection shall be treated for purposes of this Agreement
as a sale by such Lender of a participation in such rights and obligations in accordance with
subsection (e) of this Section.

          (c) The Administrative Agent, acting for this purpose as an agent of the Borrower, shall
maintain at one of its offices in Boston, Massachusetts, Charlotte, North Carolina or Dallas, Texas
a copy of each Assignment and Acceptance delivered to it and a register for the recordation of the
names and addresses of the Lenders, and the Commitment of, and principal amount of the Loans and
L/C Obligations owing to, each Lender pursuant to the terms hereof from time to time (the
“Register”). The entries in the Register shall be conclusive absent manifest error, and
the Borrower, the Administrative Agent, L/C Issuer and the Lenders may treat each Person whose name
is recorded in the Register pursuant to the terms hereof as a Lender hereunder for all purposes of
this Agreement and the other Loan Documents, notwithstanding notice to the contrary. The Register
shall be available for inspection by the Borrower, L/C Issuer and any Lender, at any reasonable
time and from time to time upon reasonable prior notice. In connection with any changes to the
Register, if necessary, the Administrative Agent will reflect the revisions on Schedule
2.01 and forward a copy of such revised Schedule 2.01 to the Borrower, L/C Issuer and
each Lender.

          (d) Upon its receipt of a duly completed Assignment and Acceptance executed by an assigning
Lender and an assignee, the assignee’s completed Administrative Questionnaire (unless the assignee
shall already be a Lender hereunder), the processing and recordation fee referred to in Section
10.04(b) (to the extent not waived by the Administrative Agent in its sole discretion) and any
written consent to such assignment required by Section 10.04(b), the Administrative Agent
shall accept such Assignment and Acceptance and record the information contained therein in the
Register and will provide prompt written notice to the Borrower of the effectiveness of such
assignment. No assignment shall be effective for purposes of this Agreement unless it has been
recorded in the Register as provided in this paragraph.

          (e) Any Lender may, without the consent of the Borrower, the Administrative Agent, L/C Issuer
or the Swingline Lender, sell participations to any Person (other than a natural person or the
Borrower or any of the Borrower’s Affiliates or Subsidiaries) (each, a “Participant”) in
all or a portion of such Lender’s rights and/or obligations under this Agreement (including all or
a portion of its Commitment and/or the Loans owing to it); provided that (i) such Lender’s
obligations under this Agreement shall remain unchanged, (ii) such Lender shall remain solely
responsible to the other parties hereto for the performance of such obligations and (iii) the
Borrower, the Administrative Agent, the Lenders and L/C Issuer shall continue to deal solely and
directly with such Lender in connection with such Lender’s rights and obligations under this
Agreement. Any agreement or instrument pursuant to which a Lender sells such a

107

 

participation shall
provide that such Lender shall retain the sole right to enforce the Loan Documents and to approve
any amendment, modification or waiver of any provision of the Loan Documents; provided
that such agreement or instrument may provide that such Lender will not, without the consent of the
Participant, agree to any amendment, waiver or other modification described in the first proviso to
Section 10.02(b) that affects such Participant. Subject to subsection (f) of this
Section, the Borrower agrees that each Participant shall be entitled to the benefits of Section
2.15 and Section 2.17 to the same extent as if it were a Lender and had acquired its
interest by assignment pursuant to subsection (b) of this Section. To the extent permitted
by law, each Participant also shall be entitled to the benefits of Section 10.08 and
Section 10.12 as though it were a Lender, provided such Participant agrees to be
subject to Section 2.18(c) as though it were a Lender.

          (f) A Participant shall not be entitled to receive any greater payment under Section
2.15 or Section 2.17 than the applicable Lender would have been entitled to receive
with respect to the participation sold to such Participant. A Participant that would be a Foreign
Lender if it were a Lender shall not be entitled to the benefits of Section 2.17 unless the
Borrower is notified of the participation sold to such Participant and such Participant agrees, for
the benefit of the Borrower, to comply with Section 2.17(e) as though it were a Lender.

          (g) Any Lender may at any time pledge or assign a Lien in all or any portion of its rights
under this Agreement to secure obligations of such Lender, including any pledge or assignment to
secure obligations to a Federal Reserve Bank or, in the case of a Lender organized outside of the
United States, a comparable Person, and this Section 10.04 shall not apply to any such
pledge or assignment of a Lien; provided, that, no such pledge or assignment of a
Lien shall release a Lender from any of its obligations hereunder or substitute any such pledgee or
assignee for such Lender as a party hereto.

          (h) The words “execution,” “signed,” “signature,” and words of like import in any Assignment
and Acceptance shall be deemed to include electronic signatures or the keeping of records in
electronic form, each of which shall be of the same legal effect, validity or enforceability as a
manually executed signature or the use of a paper-based recordkeeping system, as the case may be,
to the extent and as provided for in any applicable law, including the Federal Electronic
Signatures in Global and National Commerce Act, or any applicable state laws based on the Uniform
Electronic Transactions Act.

          (i) Notwithstanding anything to the contrary contained herein, if at any time Bank of America
(which term, in this subsection (i), shall also refer to Bank of America as L/C Issuer)
assigns all of its Commitment and Loans pursuant to subsection (b) above, Bank of America
may, upon 30 days’ notice to the Borrower and the Lenders, resign as L/C Issuer. In the event of
any such resignation as L/C Issuer, the Borrower shall be entitled to appoint from among the
Lenders a successor L/C Issuer hereunder; provided, however, that no failure by the
Borrower to appoint any such successor shall affect the resignation of Bank of America as L/C
Issuer. If Bank of America resigns as L/C Issuer, it shall retain all the rights, powers,
privileges and duties of L/C Issuer hereunder with respect to all Letters of Credit outstanding as
of the effective date of its resignation as L/C Issuer and all L/C Obligations with respect thereto
(including the right to require the Lenders to make ABR Revolving Loans, participate in Swingline
Loans or fund risk participations in Unreimbursed Amounts pursuant to Section

108

 

 2.06(c)).
Upon the appointment of a successor L/C Issuer, (i) such successor shall succeed to and become
vested with all of the rights, powers, privileges and duties of the retiring L/C Issuer, and (ii)
the successor L/C Issuer shall issue letters of credit in substitution for the Letters of Credit,
if any, outstanding at the time of such succession or make other arrangements satisfactory to Bank
of America to effectively assume the obligations of Bank of America with respect to such Letters of
Credit.

     Section 10.05 Survival. All covenants, agreements, representations and warranties
made by the Credit Parties in the Loan Documents and in the certificates or other instruments
delivered in connection with or pursuant to this Agreement or any other Loan Document shall be
considered to have been relied upon by the other parties hereto and shall survive the execution and
delivery of the Loan Document and the making of any Loans and L/C Credit Extensions,
regardless of any investigation made by any such other party or on its behalf and
notwithstanding that any Agent, L/C Issuer, the Arrangers or any Lender may have had notice or
knowledge of any Default or incorrect representation or warranty at the time any credit is extended
hereunder, and shall continue in full force and effect as long as the principal of or any accrued
interest on any Loan or any fee or any other amount payable under this Agreement is outstanding and
unpaid or any L/C Obligation is outstanding and so long as the Commitments have not expired or
terminated. The provisions of Section 2.15, Section 2.16, Section 2.17,
Section 10.03, Section 10.12 and Article IX shall survive and remain in
full force and effect regardless of the consummation of the transactions contemplated hereby, the
repayment of the Loans, the expiration or termination of the Letters of Credit and the Commitments,
or the termination of this Agreement or any provision hereof.

     Section 10.06 Counterparts; Integration; Effectiveness. This Agreement 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. Except as provided in Section 4.01, this Agreement shall become effective when
it shall have been executed by the Administrative Agent and when the Administrative Agent shall
have received counterparts hereof which, when taken together, bear the signatures of each of the
other parties hereto, and thereafter shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and assigns. Delivery of an executed counterpart of a
signature page of this Agreement by telecopy (or other electronic transmission acceptable to the
Administrative Agent) shall be effective as delivery of a manually executed counterpart of this
Agreement.

     Section 10.07 Severability. Any provision of this Agreement 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.

     Section 10.08 Right of Setoff. If an Event of Default shall have occurred and be
continuing, each of the Agents, L/C Issuer, the Lenders and their Affiliates is hereby authorized
at any time and from time to time, to the fullest extent permitted by law, to set off and apply any
and all deposits (general or special, time or demand, provisional or final) at any time held and
other obligations at any time owing by such Lender or Affiliate to or for the credit or the account

109

 

of the Borrower or any of its Subsidiaries (other than any Foreign Subsidiary) against any and all
the obligations of the Borrower now or hereafter existing under this Agreement held by such Lender,
irrespective of whether or not such Lender shall have made any demand under this Agreement and
although such obligations may be unmatured; provided, however, that any such
set-off and application shall be subject to the provisions of Section 2.18. As security
for such obligations, the Borrower hereby grants to the Agents, L/C Issuer and each Lender a
continuing security interest in any and all balances, credits, deposits, accounts or moneys of the
Borrower and its Subsidiaries then or thereafter maintained with any of the Agents, L/C Issuer and
such Lenders. The rights of each Lender under this Section 10.08 are in addition to other
rights and remedies (including other rights of setoff) which such Lender may have.

     Section 10.09 Governing Law; Jurisdiction; Consent to Service of Process.

          (a) THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS (OTHER THAN THOSE CONTAINING A CONTRARY
EXPRESS CHOICE OF LAW PROVISION) SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF
TEXAS.

          (b) EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY SUBMITS, FOR ITSELF AND
ITS PROPERTY, TO THE JURISDICTION OF ANY COURT OF THE STATE OF TEXAS LOCATED IN TARRANT OR DALLAS
COUNTY, TEXAS AND OF THE UNITED STATES DISTRICT COURT OF THE NORTHERN DISTRICT OF TEXAS, AND ANY
APPELLATE COURT FROM ANY THEREOF, IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS
AGREEMENT OR ANY OTHER LOAN DOCUMENT, OR FOR RECOGNITION OR ENFORCEMENT OF ANY JUDGMENT, AND EACH
OF THE PARTIES HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY AGREES THAT ALL CLAIMS IN RESPECT OF
ANY SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN SUCH TEXAS STATE COURT OR, TO THE
EXTENT PERMITTED BY LAW, IN SUCH FEDERAL COURT; PROVIDED, HOWEVER, THAT ANY SUIT
SEEKING ENFORCEMENT AGAINST ANY COLLATERAL OR OTHER PROPERTY MAY BE BROUGHT, AT THE ADMINISTRATIVE
AGENT’S OPTION, IN THE COURTS OF ANY JURISDICTION WHERE SUCH COLLATERAL OR OTHER PROPERTY MAY BE
FOUND. EACH OF THE PARTIES HERETO AGREES THAT, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW,
A FINAL JUDGMENT IN ANY SUCH ACTION OR PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER
JURISDICTIONS BY SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW. NOTHING IN THIS
AGREEMENT SHALL AFFECT ANY RIGHT THAT THE AGENTS OR ANY LENDER MAY OTHERWISE HAVE TO BRING ANY
ACTION OR PROCEEDING RELATING TO THIS AGREEMENT AGAINST THE BORROWER OR ITS PROPERTIES IN THE
COURTS OF ANY JURISDICTION.

          (c) EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST
EXTENT IT MAY LEGALLY AND EFFECTIVELY DO SO, ANY OBJECTION WHICH IT MAY NOW

110

 

OR HEREAFTER HAVE TO
THE LAYING OF VENUE OF ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT
IN ANY COURT REFERRED TO IN PARAGRAPH (b) OF THIS SECTION. EACH OF THE PARTIES HERETO
HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, THE DEFENSE OF AN INCONVENIENT
FORUM TO THE MAINTENANCE OF SUCH ACTION OR PROCEEDING IN ANY SUCH COURT.

          (d) EACH PARTY TO THIS AGREEMENT IRREVOCABLY CONSENTS TO SERVICE OF PROCESS BY REGISTERED
MAIL, POSTAGE PREPAID, OR BY PERSONAL SERVICE WITHIN OR WITHOUT THE STATE OF TEXAS. NOTHING IN
THIS AGREEMENT WILL AFFECT THE RIGHT OF ANY
PARTY TO THIS AGREEMENT TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY LAW.

     Section 10.10 WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL
PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT, ANY OTHER LOAN
DOCUMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER
THEORY). EACH PARTY HERETO (a) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER
PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF
LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (b) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES
HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS
AND CERTIFICATIONS IN THIS SECTION.

     Section 10.11 Headings. Article and Section headings, the List of Defined Terms and
the Table of Contents used herein are for convenience of reference only, are not part of this
Agreement and shall not affect the construction of, or be taken into consideration in interpreting,
this Agreement.

     Section 10.12 Confidentiality. In the event that a Credit Party, the General Partner,
Parent or any of their respective Affiliates provides to the Agents, the Arrangers, L/C Issuer or
the Lenders (including the Swingline Lender) confidential information belonging to such Credit
Party, the General Partner, Parent or any of their respective Affiliates (whether before or after
the date of this Agreement), then the Agents, the Arrangers, L/C Issuer and the Lenders (including
the Swingline Lender) shall thereafter use such information only in connection with, or as
contemplated by, this Agreement, the other Loan Documents and the transactions contemplated hereby
and thereby and shall maintain such information in confidence in accordance with the standards of
care and diligence that each utilizes in maintaining its own confidential information. This
obligation of confidence shall not apply to such portions of the information which (a) are in the
public domain due to no breach hereof by the Agents, the Arrangers, L/C Issuer or any of the
Lenders (including the Swingline Lender), (b) hereafter become part of the public domain without
the Agents, the Arrangers, L/C Issuer or the Lenders (including the Swingline Lender)

111

 

breaching
their obligation of confidence to such Credit Party as required hereby or by any other Loan
Document, (c) are previously known by the Agents, the Arrangers, L/C Issuer or the Lenders
(including the Swingline Lender) from some source other than such Credit Party, the General
Partner, Parent or any such Affiliate, (d) are hereafter developed by the Agents, the Arrangers,
L/C Issuer or the Lenders (including the Swingline Lender) without using such Credit Party’s, the
General Partner’s, Parent’s or any such Affiliate’s information, (e) are hereafter obtained by or
available to the Agents, the Arrangers, L/C Issuer or the Lenders (including the Swingline Lender)
from a third party who owes no obligation of confidence to such Credit Party, the General Partner,
Parent, or any such Affiliate with respect to such information, (f) are disclosed with the
Borrower’s or such Credit Party’s, the General Partner’s, Parent’s or any such Affiliate’s consent,
(g) must be disclosed either pursuant to any Governmental Rule or to Persons
regulating the activities of the Agents, the Arrangers, L/C Issuer or the Lenders (including
the Swingline Lender), or (h) as may be required by law or regulation or order of any Governmental
Authority in any judicial, arbitration or governmental proceeding. Further, an Agent, an Arranger,
L/C Issuer or a Lender (including the Swingline Lender) may disclose any such information to any
other Lender (including the Swingline Lender), any independent consultants, any independent
certified public or chartered accountants, any legal counsel employed by such Person in connection
with this Agreement or any other Loan Document, including without limitation, the enforcement or
exercise of all rights and remedies thereunder, or any assignee or participant (including
prospective assignees and participants) in the Loans; provided, however, that the
Agents, the Arrangers, L/C Issuer or the Lenders (including the Swingline Lender) shall receive a
confidentiality agreement from the Person to whom such information is disclosed such that said
Person shall have the same obligation to maintain the confidentiality of such information as is
imposed upon the Agents, the Arrangers, the L/C Issuer or the Lenders (including the Swingline
Lender) hereunder.

     Section 10.13 Interest Rate Limitation. It is the intention of the parties hereto to
conform strictly to applicable interest, usury and criminal laws and, anything herein to the
contrary notwithstanding, the obligations of the Borrower and the other Credit Parties to a Lender,
L/C Issuer or any Agent under this Agreement or any Loan Document shall be subject to the
limitation that payments of interest shall not be required to the extent that receipt thereof would
be contrary to provisions of law applicable to such Lender, L/C Issuer or Agent limiting rates of
interest which may be charged or collected by such Lender, L/C Issuer or Agent. Accordingly, if
the transactions contemplated hereby or thereby would be illegal, unenforceable, usurious or
criminal under laws applicable to a Lender, L/C Issuer or any Agent (including the laws of any
jurisdiction whose laws may be mandatorily applicable to such Lender, L/C Issuer or Agent
notwithstanding anything to the contrary in this Agreement or any other Loan Document) then, in
that event, notwithstanding anything to the contrary in this Agreement or any other Loan Document,
it is agreed as follows:

          (a) the provisions of this Section shall govern and control;

          (b) the aggregate of all consideration which constitutes interest under applicable law that is
contracted for, taken, reserved, charged or received under this Agreement or any Loan Document or
otherwise in connection with this Agreement or any Loan Document by such Lender, L/C Issuer or such
Agent shall under no circumstances exceed the maximum amount of interest allowed by applicable law
(such maximum lawful interest rate, if any, with

112

 

respect to each Lender, L/C Issuer and the Agents
herein called the “Highest Lawful Rate”), and any excess shall be cancelled automatically
and if theretofore paid shall be credited to the Borrower by such Lender, L/C Issuer or such Agent
(or, if such consideration shall have been paid in full, such excess refunded to the Borrower);

          (c) all sums paid, or agreed to be paid, to such Lender, L/C Issuer or such Agent for the use,
forbearance and detention of the indebtedness of the Borrower to such Lender, L/C Issuer or such
Agent hereunder or under any Loan Document shall, to the extent permitted by laws applicable to
such Lender, L/C Issuer or such Agent, as the case may be, be amortized, prorated, allocated and
spread throughout the full term of such indebtedness until payment in full so that the actual rate
of interest is uniform throughout the full term thereof;

          (d) if at any time the interest provided pursuant to this Section or any other clause of this
Agreement or any other Loan Document, together with any other fees or compensation payable pursuant
to this Agreement or any other Loan Document and deemed interest under laws applicable to such
Lender, L/C Issuer or such Agent, exceeds that amount which would have accrued at the Highest
Lawful Rate, then the amount of interest and any such fees or compensation to accrue to such
Lender, L/C Issuer or such Agent pursuant to this Agreement or such other Loan Document shall be
limited, notwithstanding anything to the contrary in this Agreement or any other Loan Document, to
that amount which would have accrued at the Highest Lawful Rate, but any subsequent reductions, as
applicable, shall not reduce the interest to accrue to such Lender, L/C Issuer or such Agent
pursuant to this Agreement or such other Loan Document below the Highest Lawful Rate until the
total amount of interest accrued pursuant to this Agreement or such other Loan Document, as the
case may be, and such fees or compensation deemed to be interest equals the amount of interest
which would have accrued to such Lender, L/C Issuer or Agent if a varying rate per annum equal to
the interest provided pursuant to any other relevant Section hereof (other than this Section) or
thereof, as applicable, had at all times been in effect, plus the amount of fees which would have
been received but for the effect of this Section; and

          (e) with the intent that the rate of interest herein shall at all times be lawful, and if the
receipt of any funds owing hereunder or under any other agreement related hereto (including any of
the other Loan Documents) by such Lender, L/C Issuer or such Agent would cause such Lender to
charge the Borrower a criminal rate of interest, the Lenders, L/C Issuer and the Agents agree that
they will not require the payment or receipt thereof or a portion thereof which would cause a
criminal rate of interest to be charged by such Lender, L/C Issuer or such Agent, as applicable,
and if received such affected Lender, L/C Issuer or Agent will return such funds to the Borrower so
that the rate of interest paid by the Borrower shall not exceed a criminal rate of interest from
the date this Agreement was entered into.

     For purposes of Chapter 303 of the Texas Finance Code, as amended, to the extent applicable,
the Borrower agrees that the Highest Lawful Rate shall be the “indicated (weekly) rate ceiling” as
defined in such Chapter, provided that such Lender, L/C Issuer, or such Agent may also
rely, to the extent permitted by applicable laws, on alternative maximum rates of interest under
other laws applicable to such Lender, L/C Issuer or such Agent, if greater.

113

 

     Section 10.14 Secured Affiliate. For purposes of this Agreement and all other Loan
Documents (other than applicable Hedging Agreements), if a Secured Affiliate of a Lender has
entered into one or more Hedging Agreements with any Credit Party, then to the extent that such
Secured Affiliate has rights or obligations (or if the affiliated Lender, rather than the Secured
Affiliate, were the counterparty to the Hedging Agreement, such rights or obligations that such
Lender has) hereunder or under any other Loan Document (other than applicable Hedging Agreements),
such affiliated Lender shall be the agent and attorney-in-fact for such Secured Affiliate with
regard to any such rights and obligations, or deemed rights and obligations, as if such Lender were
the counterparty to the Hedging Agreement including, but not limited to, the following: (a) all
distributions or payments in respect of Collateral owing to such Secured Affiliate shall be
distributed or paid to such Lender, (b) all representations, statements or disclaimers made herein
or in any Loan Document by or to such Lender shall be deemed to have been made by or to such
Secured Affiliate, and (c) all obligations incurred by such Lender that
would have been incurred by the Secured Affiliate if it were a party hereto shall be the
obligations of such Lender, and such Lender, as the agent and attorney-in-fact of its Secured
Affiliate, will make any and all payments owing to the Administrative Agent with respect to such
obligations or deemed obligations of its Secured Affiliate. Each such Lender represents, warrants
and covenants to and with the Administrative Agent that such Lender has, or at all applicable times
will have, full power and authority to act as agent and attorney-in-fact for its Secured
Affiliates. Under no circumstance shall any Secured Affiliate have any voting rights hereunder and
the voting rights of any affiliated Lender shall not be increased by virtue of the obligations
owing to any such Secured Affiliate.

     Section 10.15 USA Patriot Act Notice. Each Lender and the Administrative Agent (for
itself and not on behalf of any Lender) hereby notifies the Borrower that pursuant to the
requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26,
2001)) (the “Act”), it is required to obtain, verify and record information that identifies
the Borrower and each other Credit Party, which information includes the name and address of the
Borrower and each other Credit Party and other information that will allow such Lender or the
Administrative Agent, as applicable, to identify the Borrower and each other Credit Party in
accordance with the Act.

     Section 10.16 Arrangers; Syndication Agent; Co-Documentation Agents; Other Agents.
None of the Persons identified on the facing page or the signature pages of this Agreement as a
“Co-Lead Arranger and Joint Bookrunner” or “Syndication Agent” or “Co-Documentation Agent” or any
other Agent (other than the Administrative Agent) shall have any right, power, obligation,
liability, responsibility or duty under this Agreement or any other Loan Document other than,
except in the case of the Arrangers, those applicable to all Lenders as such. Without limiting the
foregoing, none of the Arrangers, the Syndication Agent, the Co-Documentation Agents or any other
Agent shall have or be deemed to have any fiduciary relationship with any Lender, and none of the
Administrative Agent, the Arrangers, the Syndication Agent, the Co-Documentation Agents or any
other Agent shall have or be deemed to have any fiduciary relationship with the Borrower or any of
its Subsidiaries. The Borrower and each Lender acknowledges that it has not relied, and will not
rely, on any of the Arrangers, the Syndication Agent, any of the Co-Documentation Agents or any
other Agent in deciding to enter into this Agreement or in taking or not taking any action
hereunder or under the Loan Documents.

114

 

     Section 10.17 Security Instruments. Each Lender on behalf of itself and any Secured
Affiliate acknowledges and agrees that the Administrative Agent has entered into the Security
Instruments on behalf of itself, the other Agents, Lenders and Secured Affiliates, and each of them
(by their signature hereto or acceptance of the benefits of the Security Instruments) hereby agree
to be bound by the terms of such Security Instruments, acknowledge receipt of copies of such
Security Instruments and consent to the rights, powers, remedies, indemnities and exculpations
given to the Administrative Agent thereunder. In the event of any inconsistency between this
Agreement and the terms of any other Loan Document, this Agreement shall control.

     Section 10.18 Waiver of Consumer Credit Loans. Pursuant to Chapter 346 of the Texas
Finance Code, as amended, the Borrower agrees that such Chapter 346 shall not govern or in any
manner apply to the Loans.

     Section 10.19 NO ORAL AGREEMENTS. THIS WRITTEN AGREEMENT AND THE OTHER LOAN DOCUMENTS
REPRESENT THE FINAL AGREEMENT 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.

     Section 10.20 No Recourse to Parent. Notwithstanding anything to the contrary in this
Agreement or any other Loan Document, in no event shall the Administrative Agent or any of the
Lenders or Secured Affiliates have any recourse against the assets of the Parent or any of its
Restricted Subsidiaries (as such term is defined in the Supplemental Indenture), or any comparable
term, or any comparable term in any other documentation evidencing any Indebtedness of the Parent,
for any of the Lender Indebtedness pursuant to any of the Loan Documents, it being acknowledged by
the Borrower that neither the Borrower nor any of its Subsidiaries are Restricted Subsidiaries as
so defined; provided, however, that notwithstanding the foregoing, if at any time
the Parent designates the Borrower or any of its Subsidiaries as a “Restricted Subsidiary” (or any
such Person otherwise becomes a “Restricted Subsidiary”) as defined in the Supplemental Indenture,
or any comparable term, or any comparable term in any other documentation evidencing any
Indebtedness of the Parent, then this Section 10.20 will automatically upon such
designation or event be null, void and of no further force or effect with respect to the Borrower
or any such applicable Subsidiary, without any further action necessary from the Administrative
Agent, any Lender, the Borrower or any of its Subsidiaries.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their
respective authorized officers as of the day and year first above written.

[Signature Pages to Follow]

115

 

	 	 	 	 	 
	 	QUICKSILVER GAS SERVICES LP, a Delaware limited
partnership

By: Quicksilver Gas Services GP LLC, a Delaware

        limited liability company, its General Partner

 	 
	 	By:  	/s/ Philip W. Cook
 	 
	 	 	Philip W. Cook, 	 
	 	 	Senior Vice President and Chief Financial
Officer 	 

Signature Page 1 to Credit Agreement

 

	 	 	 	 	 

	 	 	 	 	 
	 	BANK OF AMERICA, N.A., as a Lender and as L/C Issuer

 	 
	 	By:  	/s/ Ronald E. McKaig
 	 
	 	 	Ronald E. McKaig, 	 
	 	 	Senior Vice President 	 
	 
	 	BANK OF AMERICA, N.A., as Administrative Agent

 	 
	 	By:  	/s/ Ronald E. McKaig
 	 
	 	 	Ronald E. McKaig, 	 
	 	 	Senior Vice President 	 

Signature Page 2 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	BNP PARIBAS, as a Lender and as Syndication Agent

 	 
	 	By:  	/s/ Mark A. Cox
 	 
	 	 	Mark A. Cox, 	 
	 	 	Managing Director 	 
	 

	 	 	 	 	 
	 	 	 
	 	By:  	                          /s/ Larry Robinson
 	 
	 	 	Larry Robinson, 	 
	 	 	Director 	 

Signature Page 3 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	JPMORGAN CHASE BANK, N.A., as a Lender and as a
Co-Documentation Agent

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

Signature Page 4 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	THE ROYAL BANK OF SCOTLAND plc, as a Lender and as a
Co-Documentation Agent

 	 
	 	By:  	/s/ Lucy Walker
 	 
	 	 	Lucy Walker, 	 
	 	 	Vice President 	 

Signature Page 5 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	FORTIS CAPITAL CORP., as a Lender and as a

Co-Documentation Agent

 	 
	 	By:  	/s/ Michele Jones
 	 
	 	 	Michele Jones, 	 
	 	 	Senior Vice President 	 
	 

	 	 	 	 	 
	 	 	 
	 	By:  	                        /s/ Darell Holley
 	 
	 	 	Darrell Holley, 	 
	 	 	Managing Director 	 

Signature Page 6 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	BMO CAPITAL MARKETS FINANCING, INC., as a Lender

 	 
	 	By:  	/s/ Mary Lou Allen
 	 
	 	 	Mary Lou Allen, 	 
	 	 	Vice President 	 

Signature Page 7 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	COMPASS BANK, as a Lender

 	 
	 	By:  	/s/ Adrianne D. Griffin
 	 
	 	 	Adrianne D. Griffin, 	 
	 	 	Vice President 	 

Signature Page 8 to Credit Agreement

 

 

	 	 	 	 	 

	 	 	 	 	 
	 	COMERICA BANK, as a Lender

 	 
	 	By:  	/s/ Peter L. Sefzik
 	 
	 	 	Peter L. Sefzik, 	 
	 	 	Vice President 	 
	 

Signature Page 9 to Credit Agreement

 

 

SCHEDULE 2.01

COMMITMENTS

	 	 	 	 	 
	               Lender	 	Commitment
	Bank of America, N.A.
	 	$	19,500,000	 
	BNP Paribas
	 	$	19,500,000	 
	JPMorgan Chase Bank, N.A.
	 	$	19,500,000	 
	The Royal Bank of Scotland plc
	 	$	19,500,000	 
	Fortis Capital Corp.
	 	$	19,500,000	 
	BMO Capital Markets Financing, Inc.
	 	$	17,500,000	 
	Compass Bank
	 	$	17,500,000	 
	Comerica Bank
	 	$	17,500,000	 
	Total Commitment:
	 	$	150,000,000	 

Schedule 2.01 — 1

 

 

SCHEDULE 3.06

DISCLOSED MATTERS

	(a)	 	Pending or Threatened Litigation – None.

	(b)	 	Environmental Liability – None.

Schedule 3.06 — 1

 

 

SCHEDULE 3.12

CAPITAL STRUCTURE

	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	Outstanding
	 	 	 	 	 	 	 	 	 	 	 	 	Warrants, Options
	 	 	Jurisdiction of	 	Foreign	 	 	 	 	 	 	 	and Subscription
	       Entity Name	 	Organization	 	Qualification	 	Equity Authorized	 	Equity Issued and Outstanding	 	Rights
	Quicksilver Gas 

Services LP

	 	Delaware
	 	Texas
	 	 	4294308	 	 	469,944 General Partner
Units issued to Quicksilver
Gas Services GP LLC 

5,696,752 Common Units 

11,513,625 Subordinated Units
	 	None
	 
	 	 	 	 	 	 	 	 	 	 	 	 
	Quicksilver Gas 

Services Operating 

LLC*

	 	Delaware
	 	Texas
	 	 	4294303	 	 	100% equity interest owned
by Quicksilver Gas Services

LP
	 	None
	 
	 	 	 	 	 	 	 	 	 	 	 	 
	Quicksilver Gas 

Services Operating 

GP LLC*

	 	Delaware
	 	Texas
	 	 	4294312	 	 	100% equity interest owned
by Quicksilver Gas Services
Operating LLC
	 	None
	 
	 	 	 	 	 	 	 	 	 	 	 	 
	Cowtown Gas
Processing Partners
L.P.*

	 	Texas
	 	None
	 	 	800636089	 	 	1% general partnership
interest owned by
Quicksilver Gas Services
Operating GP LLC

99% limited partnership
interest owned by
Quicksilver Gas Services
Operating LLC
	 	None
	 
	 	 	 	 	 	 	 	 	 	 	 	 
	Cowtown Pipeline
Partners L.P.*

	 	Texas
	 	None
	 	 	800636088	 	 	1% general partnership
interest owned by
Quicksilver Gas Services
Operating GP LLC

99% limited partnership
interest owned by
Quicksilver Gas Services
Operating LLC
	 	None
	 
	 	 	 	 	 	 	 	 	 	 	 	 

 

			
	*	 	Indicates a “Material Subsidiary”

Schedule 3.12 — 1

 

 

SCHEDULE 3.14

LIST OF MATERIAL CONTRACTS

     1. Fifth Amended and Restated Cowtown Gas Facilities Gas Gathering and Processing Agreement,
dated as of August 10, 2007, among Quicksilver Resources Inc., Cowtown Gas Processing Partners L.P.
and Cowtown Pipeline Partners L.P.

     2. Omnibus Agreement dated as of August 10, 2007, among Quicksilver Gas Services GP LLC,
Quicksilver Gas Services LP, Quicksilver Gas Services Operating LLC and Quicksilver Resources Inc.

     3. Services and Secondment Agreement dated as of August 10, 2007, between Quicksilver Gas
Services GP LLC and Quicksilver Resources Inc.

     4. Contribution, Conveyance and Assumption Agreement dated as of August 10, 2007 among
Quicksilver Gas Services GP LLC, Quicksilver Gas Services LP, Quicksilver Gas Services Operating
LLC and certain other Persons party thereto.

     5. Subordinated Promissory Note, dated as of August 10, 2007, made by Quicksilver Gas Services
LP payable to the order of Quicksilver Resources Inc.

     6. Form of Indemnification Agreement by and between Quicksilver Gas Services GP LLC and its
officers and directors.

Schedule 3.14 — 1

 

 

SCHEDULE 3.17

INSURANCE

	 	 	 	 	 
	       Insurance Carrier	 	Type of Coverage	 	Policy Number
	St. Paul Fire & Marine

	 	Commercial General Liability
	 	VK04203252
	 
	 	 	 	 
	St. Paul Fire & Marine

	 	Automobile Liability &

Physical Damage
	 	VK04203252
	 
	 	 	 	 
	XL Specialty

	 	Non-Owned Aviation Liability
	 	NAN 3041208
	 
	 	 	 	 
	St. Paul Fire & Marine

	 	Umbrella Liability
	 	VK04203252

(Primary $25MM)
	 
	 	 	 	 
	Axis Surplus

	 	Excess/Umbrella Liability
	 	EAU 726544012007

($15MM xs $25MM)
	 
	 	 	 	 
	Chubb Custom

	 	Excess/Umbrella Liability
	 	79565071

($10MM xs $40MM)
	 
	 	 	 	 
	AIG Casualty (50%) 

Zurich American (50%)

	 	Property, including Boiler &
Machinery and Business
Interruption
	 	261 2023

PCA9261090
	 
	 	 	 	 
	Associated Electric &

Gas Insurance 

Syndicate (Premiums 

paid through November 

9, 2007)

	 	Directors & Officers

Liability, including

Employment Practices
	 	DO702A1A06

(Primary $10MM)
	 
	 	 	 	 
	U.S. Specialty
(Premiums paid
through November 9,
2007)

	 	Directors & Officers Liability
	 	34MGU06A13383

($10MM xs $10MM)
	 
	 	 	 	 
	Associated Electric &

Gas Insurance 

Syndicate (Premiums 

paid through November 

9, 2007)

	 	Directors & Officers Liability
	 	DO702A2A06

($10MM xs $20MM)

Schedule 3.17 — 1

 

 

SCHEDULE 7.01

EXISTING INDEBTEDNESS

None.

Schedule 7.01 — 1

 

 

SCHEDULE 7.02

EXISTING LIENS

None.

Schedule 7.02 — 1

 

 

SCHEDULE 7.04

INVESTMENTS

1. Quicksilver Gas Services LP 

          (a) 100% equity interest in Quicksilver Gas Services Operating LLC, a Delaware limited
liability company

          (b) All investments owned by Quicksilver Gas Services Operating LLC are indirect investments
of Quicksilver Gas Services LP

2. Quicksilver Gas Services Operating LLC

          (a) 100% equity interest in Quicksilver Gas Services Operating GP LLC, a Delaware limited
liability company

          (b) 99% limited partner equity interest in Cowtown Gas Processing Partners L.P., a Texas
limited partnership

          (c) 99% limited partner equity interest in Cowtown Pipeline Partners L.P., a Texas limited
partnership

          (d) All investments owned by Quicksilver Gas Services Operating GP LLC are indirect
investments of Quicksilver Gas Services Operating LLC

     3. Quicksilver Gas Services Operating GP LLC

          (a) 1% general partner equity interest in Cowtown Gas Processing Partners L.P., a Texas
limited partnership

          (b) 1% general partner equity interest in Cowtown Pipeline Partners L.P., a Texas limited
partnership

     4. Cowtown Gas Processing Partners L.P.

          (a) None

     5. Cowtown Pipeline Partners L.P.

          (a) None

Schedule 7.04 — 1

 

 

SCHEDULE 7.06

TRANSACTIONS WITH AFFILIATES

None.

Schedule 7.06 — 1

 

 

SCHEDULE 7.07

NEGATIVE PLEDGE AGREEMENTS

     1. Limited Partnership Agreement of Cowtown Pipeline Partners L.P., dated as of April 1, 2006,
as amended by that certain First Amendment to the Limited Partnership Agreement, dated August 10,
2007.

     2. Limited Partnership Agreement of Cowtown Gas Processing Partners L.P., dated as of April 1,
2006, as amended by that certain First Amendment to the Limited Partnership Agreement, dated August
10, 2007.

Schedule 7.07 — 1

 

 

EXHIBIT A

[FORM OF]

ASSIGNMENT AND ACCEPTANCE

     This Assignment and Acceptance (this “Assignment and Acceptance”) is dated as of the
Effective Date set forth below and is entered into by and between [Insert name of Assignor] (the
“Assignor”) and [Insert name of Assignee] (the “Assignee”). Capitalized terms used
but not defined herein shall have the meanings given to them in the Credit Agreement identified
below (the “Credit Agreement”), receipt of a copy of which is hereby acknowledged by the
Assignee. The Standard Terms and Conditions set forth in Annex 1 attached hereto are
hereby agreed to and incorporated herein by reference and made a part of this Assignment and
Acceptance as if set forth herein in full.

     For an agreed consideration, the Assignor hereby irrevocably sells and assigns to the
Assignee, and the Assignee hereby irrevocably purchases and assumes from the Assignor, subject to
and in accordance with the Standard Terms and Conditions and the Credit Agreement, as of the
Effective Date inserted by the Administrative Agent as contemplated below (i) all of the Assignor’s
rights and obligations as a Lender under the Credit Agreement and any other documents or
instruments delivered pursuant thereto to the extent related to the amount and percentage interest
identified below of all of such outstanding rights and obligations of the Assignor under the
respective facilities identified below (including, without limitation, the Letters of Credit
included in such facilities) and (ii) to the extent permitted to be assigned under applicable law,
all claims, suits, causes of action and any other right of the Assignor (in its capacity as a
Lender) against any Person, whether known or unknown, arising under or in connection with the
Credit Agreement, any other documents or instruments delivered pursuant thereto or the loan
transactions governed thereby or in any way based on or related to any of the foregoing, including,
but not limited to, contract claims, tort claims, malpractice claims, statutory claims and all
other claims at law or in equity related to the rights and obligations sold and assigned pursuant
to clause (i) above (the rights and obligations sold and assigned pursuant to clauses (i) and (ii)
above being referred to herein collectively as, the “Assigned Interest”). Such sale and
assignment is without recourse to the Assignor and, except as expressly provided in this Assignment
and Acceptance, without representation or warranty by the Assignor.

     This Assignment and Acceptance is being delivered to the Administrative Agent together with
(i) if the Assignee is a Foreign Lender, any documentation required to be delivered by the Assignee
pursuant to Section 2.17(e) of the Credit Agreement, duly completed and executed by the Assignee,
and (ii) if the Assignee is not already a Lender under the Credit Agreement, an Administrative
Questionnaire in the form supplied by the Administrative Agent, duly completed by the Assignee.
The [Assignor/Assignee] shall pay the fee payable to the Administrative Agent pursuant to Section
10.04(b) of the Credit Agreement to the extent not waived by the Administrative Agent in its sole
discretion.

1. Assignor:                                         .

2. Assignee:                                          [and is an Affiliate/Approved Fund of [identify
Lender]].

A-1 

 

3. Borrower: Quicksilver Gas Services LP, a Delaware limited partnership.

4. Administrative Agent: Bank of America, N.A., as the administrative agent under the
Credit Agreement.

5. Credit Agreement: Credit Agreement dated as of August 10, 2007, among Borrower, the
Lenders from time to time party thereto, Bank of America, N.A., as Administrative Agent and L/C
Issuer, BNP Paribas, as Syndication Agent, and JPMorgan Chase Bank, N.A., The Royal Bank of
Scotland plc and Fortis Capital Corp., as Co-Documentation Agents.

6. Assigned Interest:

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Aggregate Amount of	 	 	Amount of	 	 	 	 	 	 	 
	 	 	Commitment/Loans	 	 	Commitment/Loans	 	 	Percentage Assigned	 	 	 	 
	    Facility Assigned	 	for all Lenders	 	 	Assigned	 	 	of Commitment/Loans	 	 	CUSIP Number	 
	Revolving
	 	$	 	 	 	$	 	 	 	 	 	%	 	 	 	 
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	$	 	 	 	$	 	 	 	 	 	%	 	 	 	 
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	$	 	 	 	$	 	 	 	 	 	%	 	 	 	 
	 
	 	 	 	 	 	 	 	 	 	 	 	 	 

[7. Trade Date:                     ].

Effective Date:                     , 20___ [TO BE INSERTED BY ADMINISTRATIVE AGENT AND WHICH SHALL BE
THE EFFECTIVE DATE OF RECORDATION OF TRANSFER IN THE REGISTER THEREFOR.]

The terms set forth in this Assignment and Acceptance are hereby agreed to:

	 	 	 	 	 
	 	 	ASSIGNOR
	 	 	[NAME OF ASSIGNOR]
	 
	 	 	 	 
	 

	 	By:	 	 
	 

	 	 	 	 
	 

	 	Name:	 	 
	 

	 	 	 	 
	 

	 	Title:	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	 	 	ASSIGNEE
	 	 	[NAME OF ASSIGNEE]
	 
	 	 	 	 
	 

	 	By:	 	 
	 

	 	 	 	 
	 

	 	Name:	 	 
	 

	 	 	 	 
	 

	 	Title:	 	 
	 

	 	 	 	 

A-2 

 

[CONSENTED TO AND] ACCEPTED:

BANK OF AMERICA, N.A., as Administrative Agent

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

[CONSENTED TO [to be included to the extent required by Section 10.04(b)]:]

QUICKSILVER GAS SERVICES LP,

a Delaware limited partnership

			
	By:	 	Quicksilver Gas Services GP LLC,

a Delaware limited liability company, its

General Partner

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

A-3

 

ANNEX 1 TO ASSIGNMENT AND ACCEPTANCE

[                                        ]

STANDARD TERMS AND CONDITIONS FOR

ASSIGNMENT AND ACCEPTANCE

     1. Representations and Warranties.

     1.1. Assignor. The Assignor (a) represents and warrants that (i) it is the legal and
beneficial owner of the Assigned Interest, (ii) the Assigned Interest is free and clear of any
lien, encumbrance or other adverse claim and (iii) it has full power and authority, and has taken
all action necessary, to execute and deliver this Assignment and Acceptance and to consummate the
transactions contemplated hereby; and (b) assumes no responsibility with respect to (i) any
statements, warranties or representations made in or in connection with the Credit Agreement or any
other Loan Document, (ii) the execution, legality, validity, enforceability, genuineness,
sufficiency or value of the Loan Documents or any collateral thereunder, (iii) the financial
condition of the Borrower, any of its Subsidiaries, any other Credit Party or Affiliates or any
other Person obligated in respect of any Loan Document or (iv) the performance or observance by the
Borrower, any of its Subsidiaries or Affiliates or any other Person of any of their respective
obligations under any Loan Document.

     1.2. Assignee. The Assignee (a) represents and warrants that (i) it has full power
and authority, and has taken all action necessary, to execute and deliver this Assignment and
Acceptance and to consummate the transactions contemplated hereby and to become a Lender under the
Credit Agreement, (ii) it meets all requirements of an Eligible Assignee under the Credit Agreement
(subject to receipt of such consents as may be required under the Credit Agreement), (iii) from and
after the Effective Date, it shall be bound by the provisions of the Credit Agreement as a Lender
thereunder and, to the extent of the Assigned Interest, shall have the obligations of a Lender
thereunder, (iv) it has received a copy of the Credit Agreement, together with copies of the most
recent financial statements delivered pursuant to Section 6.01 thereof, as applicable, and such
other documents and information as it has deemed appropriate to make its own credit analysis and
decision to enter into this Assignment and Acceptance and to purchase the Assigned Interest on the
basis of which it has made such analysis and decision independently and without reliance on the
Administrative Agent or any other Lender, and (v) if it is a Foreign Lender, attached hereto is any
documentation required to be delivered by it pursuant to the terms of the Credit Agreement, duly
completed and executed by the Assignee; and (b) agrees that (i) it will, independently and without
reliance on the Administrative Agent, the Assignor or any other Lender, and based on such documents
and information as it shall deem appropriate at the time, continue to make its own credit decisions
in taking or not taking action under the Loan Documents, and (ii) it will perform in accordance
with their terms all of the obligations which by the terms of the Loan Documents are required to be
performed by it as a Lender.

     2. Payments. From and after the Effective Date, the Administrative Agent shall make
all payments in respect of the Assigned Interest (including payments of principal, interest,

A-4

 

fees and other amounts) to the Assignor for amounts which have accrued to but excluding the
Effective Date and to the Assignee for amounts which have accrued from and after the Effective
Date.

     3. General Provisions. This Assignment and Acceptance shall be binding upon, and
inure to the benefit of, the parties hereto and their respective successors and assigns. This
Assignment and Acceptance may be executed in any number of counterparts, which together shall
constitute one instrument. Delivery of an executed counterpart of a signature page of this
Assignment and Acceptance by telecopy shall be effective as delivery of a manually executed
counterpart of this Assignment and Acceptance. This Assignment and Acceptance shall be governed
by, and construed in accordance with, the law of the State of Texas.

A-5

 

EXHIBIT B-1

[FORM OF]

REVOLVING BORROWING REQUEST

                    , 20___

Bank of America, N.A.,

as Administrative Agent

for the Lenders referred to below

901 Main Street

Mail Code: TX1-492-14

Dallas, Texas 75202-3714

Attention: Renita M. Cummings

Telephone: (214) 209-4130

Facsimile: (214) 290-8371

Re: Quicksilver Gas Services LP — Credit Agreement

Dear Sirs:

     Reference is made to that certain Credit Agreement (as renewed, extended, amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”), dated as of
August 10, 2007, by and among Borrower, Bank of America, N.A. as the Administrative Agent, the
other Agents party thereto, and the financial institutions from time to time parties thereto as
lenders (collectively, the “Lenders”). Unless otherwise defined herein, terms defined in
the Credit Agreement are used herein with the same meanings.

     This notice constitutes a Borrowing Request for Revolving Loans and the Borrower hereby
requests a Revolving Borrowing under the Credit Agreement, and in that connection the Borrower
specifies the following information with respect to the Revolving Borrowing requested hereby:

	 	 	 	 	 
	Principal amount of Revolving Borrowing1:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Interest rate basis2:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Effective date (which is a Business Day):
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Interest Period3:
	 	 	 	 
	 

	 	 	 	 

 

			
	1	 	Not less than (i) $1,000,000 and an integral
multiple of $500,000 with respect to Eurodollar Loans or (ii) $500,000 and an
integral multiple of $100,000 with respect to ABR Revolving Borrowings (or, if
less, the aggregate balance of the unutilized Total Commitment in the case of
an ABR Revolving Borrowing).
	 
	2	 	Eurodollar Borrowing or ABR Revolving
Borrowing.

B-1-1

 

	 	 	 	 	 
	Wire Instructions and Account
Information:

	 	 	 	 
	 

	 	 	 	 

     If the Revolving Borrowing results in an increase in the aggregate outstanding principal
amount of the Revolving Loans, the Borrower hereby represents and warrants that the conditions
specified in paragraphs (a) and (b) of Section 4.02 of the Credit Agreement are satisfied.

     The undersigned signatory certifies that he/she is a Responsible Officer of the General
Partner of the Borrower.

     The Borrower has caused this Borrowing Request to be executed and delivered by a Responsible
Officer of the General Partner this ___day of                     , 20___.

Very truly yours,

QUICKSILVER GAS SERVICES LP

By: Quicksilver Gas Services GP LLC, a Delaware

         limited liability company, its General Partner

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

 

			
	3	 	If applicable, selected period must comply
with the definition of “Interest Period” and end not later than the
Maturity Date.

B-1-2

 

EXHIBIT B-2

[FORM OF]

INTEREST ELECTION REQUEST (REVOLVING BORROWING)

                    , 20___

Bank of America, N.A.,

as Administrative Agent

for the Lenders referred to below

901 Main Street

Mail Code: TX1-492-14

Dallas, Texas 75202-3714

Attention: Renita M. Cummings

Telephone: (214) 209-4130

Facsimile: (214) 290-8371

Re: Quicksilver Gas Services LP — Credit Agreement

Dear Sirs:

     Reference is made to that certain Credit Agreement (as renewed, extended, amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”), dated as of
August 10, 2007, by and among Borrower, Bank of America, N.A. as the Administrative Agent, the
other Agents party thereto, and the financial institutions from time to time parties thereto as
lenders (collectively, the “Lenders”). Unless otherwise defined herein, terms defined in
the Credit Agreement are used herein with the same meanings.

     This notice constitutes an Interest Election Request and the Borrower hereby requests the
conversion or continuation of a Revolving Borrowing under the Credit Agreement, and in that
connection the Borrower specifies the following information with respect to the Revolving Borrowing
to be converted or continued as requested hereby:

	 	 	 	 	 
	Revolving Borrowing to which this request applies1:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Principal amount of Revolving Borrowing to be converted/continued2:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Effective date of election (which is a Business Day):
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Interest rate basis of resulting Revolving Borrowing3:
	 	 	 	 
	 

	 	 	 	 

 

			
	1	 	Specify existing Type and last day of current
Interest Period.
	 
	2	 	Not less than (i) $1,000,000 and an integral
multiple of $500,000 with respect to Eurodollar Loans or (ii) $500,000 and an
integral multiple of $100,000 with respect to ABR Revolving Borrowings (or, if
less, the aggregate balance of the unutilized Total Commitment in the case of
an ABR Revolving Borrowing).

B-2-1

 

	 	 	 	 	 
	Interest Period of resulting Revolving Borrowing4:

	 	 	 	 
	 

	 	 	 	 

The undersigned signatory certifies that he/she is a Responsible Officer of the General Partner of
the Borrower.

     The Borrower has caused this Interest Election Request to be executed and delivered by a
Responsible Officer of the General Partner this                      day of                     , 20___.

Very truly yours,

QUICKSILVER GAS SERVICES LP

By: Quicksilver Gas Services GP LLC, a Delaware

         limited liability company, its General Partner

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

 

			
	3	 	Eurodollar Borrowing or ABR Revolving
Borrowing.
	 
	4	 	Which must comply with the definition of
“Interest Period” and end not later than the Maturity Date.

B-2-2

 

EXHIBIT B-3

[FORM OF]

SWINGLINE BORROWING REQUEST

                    , 20___

Bank of America, N.A.,

as Administrative Agent

for the Lenders referred to below

901 Main Street

Mail Code: TX1-492-14

Dallas, Texas 75202-3714

Attention: Renita M. Cummings

Telephone: (214) 209-4130

Facsimile: (214) 290-8371

Re: Quicksilver Gas Services LP — Credit Agreement

Dear Sirs:

     Reference is made to that certain Credit Agreement (as renewed, extended, amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”), dated as of
August 10, 2007, by and among Borrower, Bank of America, N.A. as the Administrative Agent, the
other Agents party thereto, and the financial institutions from time to time parties thereto as
lenders (collectively, the “Lenders”). Unless otherwise defined herein, terms defined in
the Credit Agreement are used herein with the same meanings.

     This notice constitutes a Borrowing Request for Swingline Loans and the Borrower hereby
requests a Swingline Borrowing under the Credit Agreement, and in that connection the Borrower
specifies the following information with respect to the Swingline Borrowing requested hereby:

	 	 	 	 	 
	Principal amount of Swingline Borrowing1:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Interest rate basis2:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Effective date (which is a Business Day):
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Wire Instructions and Account
	 	 	 	 
	Information (or other disbursement instructions):
	 	 	 	 
	 

	 	 	 	 

 

			
	1	 	Not less than $500,000 and an integral
multiple of $100,000 (or, if less, the aggregate balance of the unutilized
Total Commitment).
	 
	2	 	Specified Rate Swingline Borrowing or ABR
Swingline Borrowing.

B-3-1

 

     The Borrower hereby represents and warrants that the conditions specified in paragraphs (a)
and (b) of Section 4.02 of the Credit Agreement are satisfied.

     The undersigned signatory certifies that he/she is a Responsible Officer of the General
Partner of the Borrower.

     The Borrower has caused this Borrowing Request to be executed and delivered by a Responsible
Officer of the General Partner this ___day of                     , 20___.

Very truly yours,

QUICKSILVER GAS SERVICES LP

By: Quicksilver Gas Services GP LLC, a Delaware

         limited liability company, its General Partner

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

B-3-2

 

EXHIBIT B-4

[FORM OF]

INTEREST ELECTION REQUEST (SWINGLINE BORROWING)

                    , 20      

Bank of America, N.A.,

as Administrative Agent

for the Lenders referred to below

901 Main Street

Mail Code: TX1-492-14

Dallas, Texas 75202-3714

Attention: Renita M. Cummings

Telephone: (214) 209-4130

Facsimile: (214) 290-8371

Re:   Quicksilver Gas Services LP — Credit Agreement

Dear Sirs:

     Reference is made to that certain Credit Agreement (as renewed, extended, amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”), dated as of
August 10, 2007, by and among Borrower, Bank of America, N.A. as the Administrative Agent, the
other Agents party thereto, and the financial institutions from time to time parties thereto as
lenders (collectively, the “Lenders”). Unless otherwise defined herein, terms defined in
the Credit Agreement are used herein with the same meanings.

     This notice constitutes an Interest Election Request and the Borrower hereby requests the
conversion of a Swingline Borrowing under the Credit Agreement, and in that connection the Borrower
specifies the following information with respect to the Swingline Borrowing to be converted as
requested hereby:

	 	 	 
	Swingline Borrowing to which this request applies1:

	 	                                        
	 
	 	 
	Principal amount of Swingline Borrowing to be converted2:

	 	                                        
	 
	 	 
	Effective date of election (which is a Business Day):

	 	                                        
	 
	 	 
	Interest rate basis of resulting Revolving Borrowing3:

	 	                                        

 

			
	1	 	Specify existing Type.
	 
	2	 	Not less than $500,000 and an integral
multiple of $100,000 (or, if less, the total outstanding principal balance of
the Swingline Loan).

B-4-1

 

	 	 	 
	Interest Period of resulting Revolving Borrowing4:

	 	                                        

The undersigned signatory certifies that he/she is a Responsible Officer of the General Partner of
the Borrower.

     The Borrower has caused this Interest Election Request to be executed and delivered by a
Responsible Officer of the General Partner this                      day of                                         , 20      .

	 	 	 	 	 	 	 	 	 
	 	 	Very truly yours,	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	QUICKSILVER GAS SERVICES LP	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By:	 	Quicksilver Gas Services GP LLC, a Delaware

limited liability company, its General Partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Title:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

 

			
	3	 	Eurodollar Borrowing or ABR Revolving Borrowing.
	 
	4	 	Which must comply with the definition of “Interest Period” and end not later than the Maturity Date.

B-4-2

 

EXHIBIT C-1

LIST OF 

SECURITY INSTRUMENTS

     1. Guaranty and Collateral Agreement executed by the Borrower and the other Credit Parties for
the benefit of the Administrative Agent.

          A. Financing Statement(s) relating to document 1 above.

     2. Mortgages executed by each of the Cowtown Entities for the benefit of the Administrative
Agent.

          A. Financing Statement(s) relating to document 2 above.

C-1-1

 

EXHIBIT C-2

[FORM OF] 

MORTGAGE

(attached)

C-2-1

 

EXHIBIT C-3

[FORM OF] 

GUARANTY AND COLLATERAL AGREEMENT

(attached)

C-3-1

 

EXHIBIT D

[FORM OF]

NOTE

			
	 	 	 
	$                    
	 	                     , 20      

     The undersigned, QUICKSILVER GAS SERVICES LP, a Delaware limited partnership (the
“Borrower”), for value received, promises and agrees to pay to
                                                             (the “Lender”), or order, at the payment office of BANK OF
AMERICA, N.A. (the “Administrative Agent”), at 901 Main Street, Mail Code: TX1-492-14,
Dallas, Texas 75202-3714, the principal sum of                                                              DOLLARS
($                                         ), or such lesser amount as shall equal the aggregate principal amount of the
Loans made by the Lender hereunder to the Borrower under the Credit Agreement, as hereinafter
defined, in lawful money of the United States of America and in immediately available funds, on the
dates and in the principal amounts provided in the Credit Agreement referred to below, and to pay
interest on the unpaid principal amount as provided in the Credit Agreement for such Loans made by
the Lender to the Borrower under the Credit Agreement, at such office, in like money and funds, for
the period commencing on the Effective Date until such Loans shall be paid in full, at the rates
per annum and on the dates provided in the Credit Agreement.

     In addition to and cumulative of any payments required to be made against this Note pursuant
to the Credit Agreement, this Note, including all principal and accrued interest then unpaid, shall
be due and payable on the Maturity Date. All payments shall be applied first to accrued interest
and the balance to principal, except as otherwise expressly provided in the Credit Agreement.
Prepayments on this Note shall be applied in the manner set forth in the Credit Agreement.

     This Note is one of the Notes referred to in the Credit Agreement dated as of August 10, 2007,
by and among the Borrower, Bank of America, N.A., individually, and as Administrative Agent, BNP
Paribas, as Syndication Agent, JPMorgan Chase Bank, N.A., The Royal Bank of Scotland plc and Fortis
Capital Corp., as Co-Documentation Agents, and the financial institutions parties thereto
(including the Lender) (such Credit Agreement, together with all amendments, restatements,
renewals, extensions, supplements or other modifications thereto, being the “Credit
Agreement”). This Note evidences the Loans made by the Lender thereunder and shall be governed
by the Credit Agreement. Capitalized terms used but not defined in this Note and which are defined
in the Credit Agreement shall have the respective meanings herein as are assigned in the Credit
Agreement.

     The Lender is hereby authorized by the Borrower to endorse on Schedule A (or a continuation
thereof) attached to this Note, the Type of Loans, the amount and date of each payment or
prepayment of principal of such Loans received by the Lender and the Interest Periods and interest
rates applicable to such Loans, provided, that, any failure by the Lender to make
any such endorsement shall not affect the obligations of the Borrower under the Credit Agreement or
under this Note in respect of such Loans.

D-1

 

     Except only for any notices which are specifically required by the Credit Agreement or the
other Loan Documents, the Borrower and any and all co-makers, endorsers, guarantors and sureties
severally waive notice, demand, presentment for payment, protest, diligence in collecting and the
filing of suit for the purpose of fixing liability, and consent that the time of payment hereof may
be extended and re-extended from time to time without notice to any of them. Each such Person
agrees that his, her or its liability on or with respect to this Note shall not be affected by any
release of or change in any guaranty or security at any time existing or by any failure to perfect
or maintain perfection of any lien against or security interest in any such security or the partial
or complete enforceability of any guaranty or other surety obligation, in each case in whole or in
part, with or without notice and before or after maturity.

     The Credit Agreement provides for the acceleration of the maturity of this Note upon the
occurrence of certain events and for prepayment of Loans upon the terms and conditions specified
therein. Reference is made to the Credit Agreement for all other pertinent purposes.

     This Note is issued pursuant to and is entitled to the benefits of the Credit Agreement and is
secured by the Security Instruments.

     THIS NOTE SHALL BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF
TEXAS FROM TIME TO TIME IN EFFECT.

     THIS WRITTEN NOTE AND THE OTHER LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN 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.

	 	 	 	 	 	 	 	 	 
	 	 	QUICKSILVER GAS SERVICES LP, a

Delaware limited partnership	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By:	 	Quicksilver Gas Services GP LLC, a Delaware

limited liability company, its General Partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Title:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

D-2

 

SCHEDULE A

This Note evidences the Loans made by the Lender under the within-described Credit Agreement to the
Borrower, in the principal amounts set forth below, which Loan is of the Type, at the interest rate
and for the Interest Periods and was made on the dates set forth below, subject to the payments of
principal set forth below:

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Principal Amount of	 	 	 	 	 	Interest Period/	 	Date of Payment or	 	Amount Paid or	 	Balance Out-
	Date Made	 	Loan	 	Type	 	Interest Rate	 	Maturity Date	 	Prepayment	 	Prepaid	 	standing
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 	 

D-3

 

EXHIBIT E

[FORM OF]

COMMITMENT INCREASE CERTIFICATE

                                        , 20     

	 	 	 
	To:

	 	Bank of America, N.A.,
	 

	 	as Administrative Agent
	 

	 	for the Lenders referred to below
	 

	 	700 Louisiana Street, 8th Floor
	 

	 	Mail Code: TX4-213-08-14
	 

	 	Houston, Texas 77002
	 

	 	Attention: Ronald E. McKaig
	 

	 	Facsimile: (713) 247-7286

     The undersigned Borrower, Bank of America, N.A., as the Administrative Agent, certain other
Agents party thereto and the financial institutions from time to time parties thereto as lenders
(the “Lenders”) have heretofore entered into a Credit Agreement, dated as of August 10,
2007, as amended, restated, supplemented or otherwise modified from time to time (the “Credit
Agreement”). Capitalized terms not otherwise defined herein shall have the meaning given to
such terms in the Credit Agreement.

     This Commitment Increase Certificate is being delivered pursuant to Section 2.08(d) of the
Credit Agreement.

     Please be advised that the undersigned Lender has agreed (a) to increase its Commitment under
the Credit Agreement effective as of                     , 20       from $[                    ] to $[               
     ] and
(b) that it shall continue to be a party in all respects to the Credit Agreement and the other Loan
Documents.

	 	 	 	 	 	 	 	 	 
	 	 	QUICKSILVER GAS SERVICES LP	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By:	 	Quicksilver Gas Services GP LLC, its General

Partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Title:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

 E-1

 

	 	 	 	 	 
	ACCEPTED AND AGREED:
	 
	 	 	 	 
	BANK OF AMERICA, N.A., as Administrative Agent
	 
	 	 	 	 
	By:
	 	 	 	 
	 

	 	 	 	 
	Name:	 	 
	 

	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	ACCEPTED AND AGREED:
	 
	 	 	 	 
	[                                                                      
          ], as a Lender
	 
	 	 	 	 
	By:
	 	 	 	 
	 

	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

 E-2

 

EXHIBIT F

[FORM OF]

ADDITIONAL LENDER CERTIFICATE

                                        , 20      

	 	 	 
	To:

	 	Bank of America, N.A.,
	 

	 	as Administrative Agent
	 

	 	for the Lenders referred to below
	 

	 	700 Louisiana Street, 8th Floor
	 

	 	Mail Code: TX4-213-08-14
	 

	 	Houston, Texas 77002
	 

	 	Attention: Ronald E. McKaig

     The undersigned Borrower, Bank of America, N.A., as the Administrative Agent, certain other
Agents party thereto, and the financial institutions from time to time parties thereto as lenders
(the “Lenders”) have heretofore entered into a Credit Agreement, dated as of August 10,
2007, as amended, restated, supplemented or otherwise modified from time to time (the “Credit
Agreement”). Capitalized terms not otherwise defined herein shall have the meaning given to
such terms in the Credit Agreement.

     This Additional Lender Certificate is being delivered pursuant to Section 2.08(d) of the
Credit Agreement.

     Please be advised that the undersigned Additional Lender has agreed (a) to become a Lender
under the Credit Agreement effective as of                                                             , 20       with a Commitment of
$[                    ] and (b) that it shall be a party in all respects to the Credit Agreement and the
other Loan Documents.

     This Additional Lender Certificate is being delivered to the Administrative Agent together
with (i) if the Additional Lender is a Foreign Lender, any documentation required to be delivered
by such Additional Lender pursuant to Section 2.17(e) of the Credit Agreement, duly completed and
executed by the Additional Lender, and (ii) an Administrative Questionnaire in the form supplied by
the Administrative Agent, duly completed by the Additional Lender. [The [Borrower/Additional
Lender] shall pay the fee payable to the Administrative Agent pursuant to Section 2.08(d)(ii)(F) of
the Credit Agreement.]

	 	 	 	 	 	 	 	 	 
	 	 	Very truly yours,	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	QUICKSILVER GAS SERVICES LP	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By:	 	Quicksilver Gas Services GP LLC, its General

Partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

 F-1

 

	 	 	 	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	Title:	 	 	 	 
	 

	 	 	 	 	 	 	 	 

	 	 	 	 	 
	ACCEPTED AND AGREED:
	 
	 	 	 	 
	BANK OF AMERICA, N.A., as Administrative Agent
	 
	 	 	 	 
	By:
	 	 	 	 
	 

	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	Title:
	 

	 	 	 	 
	 
	 	 	 	 
	ACCEPTED AND AGREED:
	 
	 	 	 	 
	[                                                                     
           ], as a Lender
	 
	 	 	 	 
	By:
	 	 	 	 
	 

	 	 	 	 
	Name:
	 	 	 	 
	 

	 	 	 	 
	Title:
	 	 	 	 
	 

	 	 	 	 

 F-2

 

EXHIBIT G

[FORM OF]

PARENT SUBORDINATED NOTE

 G-1

 

SUBORDINATED PROMISSORY NOTE

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY
APPLICABLE STATE SECURITIES LAWS, AND MAY NOT BE OFFERED OR SOLD UNLESS IT HAS BEEN REGISTERED
UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS OR UNLESS AN EXEMPTION FROM REGISTRATION IS
AVAILABLE AND THEN ONLY IN COMPLIANCE WITH THE RESTRICTIONS ON TRANSFER SET FORTH HEREIN.

THIS INSTRUMENT AND THE RIGHTS AND OBLIGATIONS EVIDENCED HEREBY ARE SUBORDINATE IN THE MANNER AND
TO THE EXTENT SET FORTH HEREIN TO THE SENIOR DEBT (AS HEREINAFTER DEFINED); AND EACH HOLDER OF THIS
INSTRUMENT, BY ITS ACCEPTANCE HEREOF, IRREVOCABLY AGREES TO BE BOUND BY THE SUBORDINATION
PROVISIONS HEREIN.

	 	 	 
	$50,000,000
	 	August 10, 2007

     FOR VALUE RECEIVED, QUICKSILVER GAS SERVICES LP, a Delaware limited partnership
(“Payor”), HEREBY AGREES TO PAY to the order of QUICKSILVER RESOURCES INC., a Delaware
corporation, or its successors and assigns (together with its successors and assigns, the
“Subordinated Creditor”), in lawful currency of the United States of America, in
immediately available funds, at such location or bank account as the Subordinated Creditor shall
from time to time designate, the principal amount of Fifty Million and 00/100 Dollars
($50,000,000), together with interest, compounded quarterly, on the unpaid principal balance
outstanding from time to time from the date hereof until the Maturity Date (as hereinafter defined)
at a rate of interest per annum equal to the lesser of (a) the Note Rate (as hereinafter defined)
or (b) the Highest Lawful Rate (as hereinafter defined); provided, however, that,
notwithstanding the foregoing, in the event the Payor fails to make any payment of any portion of
the principal of this Note when due and payable (including, without limitation, due to a Blockage
Event), at the request of the Subordinated Creditor, interest on such overdue amount (including,
without limitation, interest with respect to such overdue amount to the extent permitted by
applicable law) shall accrue at a rate of interest per annum equal to the lesser of (a) the Note
Rate plus two percent (2.00%) and (b) the Highest Lawful Rate. Capitalized terms used in this
Subordinated Promissory Note (this “Note”), but not defined herein shall have the meanings
specified therefor in the Credit Agreement, dated as of August 10, 2007 (as amended, restated,
supplemented or otherwise modified from time to time, the “Credit Agreement”), among Payor,
as the borrower, the Lenders party thereto, Bank of America, N.A., as L/C Issuer thereunder, Bank
of America, N.A., as Administrative Agent (or any successor administrative agent appointed pursuant
to Article IX of the Credit Agreement, the “Administrative Agent”) for the Lenders
thereunder, and the other Agents party thereto.

     1. Principal. Subject to the subordination provisions contained in Section 7
hereof, Payor promises to pay the principal on this Note in equal consecutive quarterly
installments of $275,000 on the last Business Day of each calendar quarter, beginning on March 31,
2008, and to pay the entire remaining outstanding principal balance on this Note on February 10,
2013 (the

1

 

“Maturity Date”); provided, that, if the final maturity date of the
Senior Debt (as hereinafter defined) is extended to any date later than August 10, 2012 (such later
date being referred to herein as the “Extended Senior Maturity Date”), the Maturity Date
shall be automatically extended without further action by Payor or the Subordinated Creditor to the
date that is six months after such Extended Senior Maturity Date, and the amount of the quarterly
installments of principal will be reamortized to create equal quarterly installments of the
remaining outstanding principal balance on this Note over the remaining term of this Note as
extended. Notwithstanding anything to the contrary herein, any amounts paid or prepaid hereunder
may not be reborrowed thereafter. Furthermore, notwithstanding anything to the contrary herein,
all amounts payable pursuant to this Note (including, without limitation, all principal and
interest payments, and prepayments thereof) may, at the request of the Subordinated Creditor, be
paid, in whole or in part, using Equity Interests of Payor.

     2. Interest. Subject to the subordination provisions contained in Section 7
hereof, Payor also promises to pay interest on the unpaid principal amount from time to time
outstanding hereunder from the date hereof until such principal amount is paid in full at the
applicable rate per annum set forth above, which interest shall be payable quarterly on the last
Business Day of each calendar quarter, beginning March 31, 2008, and on the Maturity Date, (a) by
capitalizing the accrued and unpaid interest on this Note and adding it to the then unpaid
principal amount hereof, or (b) at the request of the Subordinated Creditor, by wire transfer of
immediately available funds, in lawful currency of the United States of America, to a bank account
designated by the Subordinated Creditor to Payor on or prior to the applicable due date therefor.
Interest on this Note will be calculated based on a 360-day year and paid for the actual number of
days elapsed.

     As used herein, the term “Note Rate” shall mean a rate of interest per annum equal to
the Adjusted Eurodollar Rate for an Interest Period of three (3) months, plus the Applicable Rate
for Eurodollar Loans for such day as determined pursuant to the terms of the Credit Agreement,
regardless of whether such interest rate is in effect for any Borrowings outstanding under the
Credit Agreement, plus one percent (1.00%). The Note Rate shall change effective upon each change
in the Applicable Rate under the Credit Agreement and shall remain in effect until the next change
in the Applicable Rate effected pursuant to the Credit Agreement. Each determination by the
Subordinated Creditor of the Note Rate shall, except in cases of manifest error, be final,
conclusive and binding. If the Subordinated Creditor determines (which determination shall be
conclusive absent manifest error) that adequate and reasonable means do not exist for ascertaining
the Adjusted Eurodollar Rate or the Eurodollar Rate, as applicable, pursuant to the terms of the
Credit Agreement, for the Interest Period specified above, then, at the option of the Subordinated
Creditor, and in the Subordinated Creditor’s sole discretion, the Note Rate shall be determined by
the Subordinated Creditor by reference to (a) the Adjusted Eurodollar Rate for such other Interest
Period as the Subordinated Creditor may select in its sole discretion, or (b) the interest rate
applicable to ABR Loans as provided in the Credit Agreement, in each case, plus the Applicable Rate
for such Type of Loan

     3. Prepayments. Subject to the subordination provisions contained in Section
7 hereof, this Note may be prepaid in full or in part at any time and from time to time without
premium or penalty. The prepayment of any principal amount of this Note shall be made together
with all accrued and unpaid interest thereon through the date of prepayment and all

2

 

accrued and unpaid costs and expenses then payable hereunder. In the event of a partial
prepayment, the Subordinated Creditor shall record the date and amount of any such prepayments on
the reverse side of this Note, and interest shall cease to accrue on such prepaid principal
amounts.

     4. Note Events of Default.

          (a) The occurrence of any of the following events constitutes an event of default under this
Note (each, a “Note Event of Default”):

          (i) Payor defaults in the payment of any portion of the principal of, interest on, or
other amounts owing under, this Note when due and payable, except to the extent a failure to
pay is due to a Blockage Event; or

          (ii) Payor or any other Person (other than the Subordinated Creditor) fails to perform
or observe any other term, covenant or agreement contained in this Note, and such default
shall continue unremedied for a period of thirty (30) days after the earlier to occur of (A)
the date upon which a Responsible Officer of the General Partner becomes aware of such
default and (B) the date upon which written notice thereof is given to Payor by the
Subordinated Creditor; or

          (iii) an Event of Default (as defined in the Credit Agreement) shall occur; or

          (iv) any representation or warranty at any time made by Payor or any other Person in
this Note shall be, or shall prove to have been, false or misleading in any material respect
when so made; or

          (v) this Note shall cease, for any reason, to be in full force and effect; any
provision of this Note shall for any reason cease to be valid and binding on or enforceable
against Payor; the validity or enforceability of this Note is contested by Payor or any
other Person; or Payor denies it has any further liability or obligation under this Note.

          (b) Subject to the subordination provisions contained in Section 7 hereof, upon the
occurrence and during the continuance of any Note Event of Default, the Subordinated Creditor shall
have the right, without notice, demand, presentment, notice of nonpayment or nonperformance,
protest, notice of protest, notice of intent to accelerate, notice of acceleration or any other
notice or action of any kind, ALL OF WHICH PAYOR HEREBY EXPRESSLY WAIVES AND RELINQUISHES, (i) by
notice to Payor, to declare the entire principal amount then outstanding on this Note, and all
accrued and unpaid interest thereon and all other accrued and unpaid amounts hereunder, immediately
due and payable, whereupon all such principal, interest and other amounts shall become immediately
due and payable, and the Subordinated Creditor may proceed to enforce the payment of such
principal, interest and other amounts, or part thereof, in such manner as the Subordinated Creditor
may elect and (ii) to exercise all rights and remedies available to it under this Note or at law or
in equity;

3

 

provided, however, subject to the terms hereof, upon the occurrence of any Event of Default defined
in clause (h) or (i) of Article VIII of the Credit Agreement (in the case of clause (h) of Article
VIII of the Credit Agreement, upon the expiration of the sixty (60) day period mentioned therein),
the unpaid principal amount of this Note, and all accrued and unpaid interest thereon and all other
accrued and unpaid amounts hereunder, shall automatically become due and payable without further
act of the Subordinated Creditor.

     5. Ranking. All obligations evidenced hereby shall (a) be subordinated pursuant to
the subordination provisions contained in Section 7 hereof to the prior payment in full of
the Senior Debt, (b) rank pari passu with all unsubordinated indebtedness of Payor (other than the
Senior Debt), and (c) rank senior to any subordinated indebtedness of Payor.

     6. Amendment and Restatement. Upon the payment in full of the Senior Debt, Payor
hereby agrees, if requested by the Subordinated Creditor, to execute and deliver to the
Subordinated Creditor a new note that will amend and restate this Note, which amended and restated
note shall, among other things, include those provisions of the Credit Agreement (including,
without limitation, the applicable provisions for determining the interest rate under the Credit
Agreement, the covenants contained in Articles VI and VII of the Credit Agreement, the Events of
Default (as defined in the Credit Agreement) contained in Article VIII of the Credit Agreement and
the applicable defined terms contained in the Credit Agreement that are used in such interest rate
provisions, covenants and Events of Default) as the Subordinated Creditor in its sole discretion
shall determine appropriate to include in such amended and restated note, the provisions of the
Credit Agreement so included in such amended and restated note to include (a) such modifications
thereto, in the Subordinated Creditor’s sole discretion, necessary to conform such provisions (for
example, definitions) for use in the context of such amended and restated note, and (b) any other
changes thereto (including, but not limited to, changing the methodology for determining the Note
Rate) requested by the Subordinated Creditor and consented to by Payor, such consent not to be
unreasonably withheld, conditioned or delayed.

     7. Subordination Provisions. (a) The aggregate principal amount owing to the
Subordinated Creditor from time to time under this Note, all accrued and unpaid interest thereon
(if any), and any and all other Indebtedness evidenced by or otherwise owing in respect of this
Note, whether now or hereafter existing, including, without limitation, all such Indebtedness
under, or in respect of, any and all extensions, modifications, substitutions, amendments,
amendments and restatements, renewals, refinancings and refundings of any or all of the foregoing
Indebtedness, and any instrument or agreement evidencing, governing or otherwise setting forth the
terms of any such Indebtedness or other Indebtedness incurred in any such extension, modification,
substitution, amendment, amendment and restatement, renewal, refinancing or refunding, in each case
whether direct or indirect, absolute or contingent, and whether for principal, interest (including,
without limitation, interest accruing after the filing of a petition initiating any Insolvency
Proceeding (as hereinafter defined), whether or not such interest accrues after the filing of such
petition for purposes of any applicable Insolvency Laws (as hereinafter defined), or is an allowed
claim in such Insolvency Proceeding), premiums, fees, indemnification obligations, contract causes
of action, costs, expenses or otherwise (all such Indebtedness being, collectively, the
“Subordinated Debt”) is and shall be subordinate and junior in right of payment, to the
extent and in the manner hereinafter set forth, to the prior payment in full of all Indebtedness,
whether now or hereafter existing, including, without

4

 

limitation, all Lender Indebtedness, under or in respect of: (i) the Credit Agreement, the
Notes, the Security Instruments, the other Loan Documents and the Hedging Agreements entered into
by Payor or any of its Subsidiaries with any Lender or Secured Affiliate (the “Secured Hedging
Agreements”) and (ii) any and all extensions, modifications, substitutions, amendments,
amendments and restatements, renewals and refundings of any or all of the foregoing Indebtedness,
and any instrument or agreement evidencing, governing or otherwise setting forth the terms of any
such Indebtedness or other Indebtedness incurred in any such extension, modification, substitution,
amendment, amendment and restatement, renewal or refunding, in each case whether direct or
indirect, absolute or contingent, and whether for principal, interest (including, without
limitation, interest accruing after the filing of a petition initiating any Insolvency Proceeding,
whether or not such interest accrues after the filing of such petition for purposes of any
applicable Insolvency Laws, or is an allowed claim in such Insolvency Proceeding), premiums, fees,
indemnification obligations (exclusive of indemnification obligations not then owing which survive
the termination or expiration of the Credit Agreement or the other Loan Documents, to the extent
demand therefor has not been made or threatened as of the date of such termination or expiration),
contract causes of action, costs and expenses pursuant to the Loan Documents (all such Indebtedness
being, collectively, the “Senior Debt”). For all purposes of this Note, the Senior Debt
shall not be deemed to have been paid in full (“paid in full” or “payment in full”)
until (A) such Senior Debt (exclusive of indemnification obligations not then owing which survive
the termination or expiration of the Credit Agreement or the other Loan Documents, to the extent
demand therefor has not been made or threatened as of the date of such termination or expiration,
and Cash Collateralized L/C Obligations) has been indefeasibly paid in full in cash, (B) the
termination of all of the Commitments, and (C) there are no Letters of Credit (exclusive of Letters
of Credit which have been Cash Collateralized) issued under the Loan Documents.

          (b) Until all of the Senior Debt shall have been paid in full, subject to the proviso to this
sentence and the last sentence of this Section 7(b), no payment or distribution of any
property or assets of Payor of any kind or character (including, without limitation, any payment
that may be payable in respect of, or turnover of funds to be applied to, the Subordinated Debt by
reason of any other Indebtedness or obligations of Payor being subordinated to payment of the
Subordinated Debt) shall be made by or on behalf of Payor for or on account of any Subordinated
Debt or any purchase, redemption or other acquisition thereof (including, without limitation, by
way of set-off, counterclaim or otherwise), and the Subordinated Creditor shall not ask, demand,
sue for, take or receive from Payor, directly or indirectly, in cash or other property or by
set-off or in any other manner (including, without limitation, from or by way of collateral),
payment of all or any of the Subordinated Debt; provided, however, that
notwithstanding the foregoing or anything to the contrary contained herein or in the Loan
Documents, if no Blockage Event then exists or would result therefrom, Payor (i) may and shall make
any and all regularly scheduled payments in respect of the Subordinated Debt, including any missed
payments (and default interest thereon at the then applicable rate provided herein) that it was
prohibited from making to the Subordinated Creditor during the existence of any Blockage Event, to
the Subordinated Creditor with no further notice, consent or action by the Administrative Agent,
the Lenders or the Secured Affiliates, and (ii) may make, at any time and from time to time in
whole or in part, any prepayments of this Note to the Subordinated Creditor with no further notice,
consent or action by the Administrative Agent, the Lenders or the Secured Affiliates. Payor and
the Subordinated Creditor (by its acceptance

5

 

hereof) acknowledge and agree that, as of the date of this Note, a Blockage Event of the type
described in clause (C) of the definition thereof exists. As used herein, the term “Blockage
Event” shall mean (A) an Event of Default exists on the date of any payment on this Note, (B) a
judicial proceeding is pending with respect to any Event of Default on the date of any payment on
this Note, or (C) the Consolidated Leverage Ratio as of the end of the Fiscal Quarter immediately
preceding the date of any principal payment on this Note is equal to or greater than 3.5 to 1.0 and
would be equal to or greater than 3.5 to 1.0 after giving pro forma effect to any such principal
payment (in each case as calculated pursuant to the following sentence). Notwithstanding anything
to the contrary contained in the Credit Agreement, including in the definitions of Consolidated
Leverage Ratio, Consolidated Funded Debt or Funded Indebtedness, the Consolidated Leverage Ratio
for purposes of this Section 7(b) only shall be calculated to include any Indebtedness
remaining on this Note after giving pro forma effect to any such permitted payment hereunder.
Notwithstanding the foregoing or anything to the contrary contained herein, (1) nothing in this
Note shall prevent the occurrence of any Note Event of Default, the acceleration by the
Subordinated Creditor of any of the indebtedness hereunder after the acceleration of the Senior
Debt or the giving of any notice by the Subordinated Creditor to Payor with respect thereto, (2)
Payor may at all times pay interest hereunder by capitalization of the accrued and unpaid interest
as described in Section 2 of this Note, and (3) at the request of the Subordinated
Creditor, Payor may at all times make payments or prepayments, in whole or in part, with respect to
this Note using Equity Interests of Payor and/or using the proceeds from the contemporaneous sale
or issuance of Equity Interests of Payor.

          (c) In the event of any dissolution, winding up, liquidation, arrangement, reorganization,
adjustment, protection, relief or composition of Payor or its debts, whether voluntary or
involuntary, in any bankruptcy, insolvency, arrangement, reorganization, receivership, relief or
other similar action or proceeding under the United States Federal Bankruptcy Code or any other
federal or state bankruptcy or insolvency laws or any similar Governmental Rule of any other
jurisdiction covering the protection of creditors’ rights or the relief of debtors (collectively,
the “Insolvency Laws”) or upon an assignment for the benefit of creditors or any other
marshalling of the property, assets and liabilities of Payor or otherwise (each, an “Insolvency
Proceeding”), the Administrative Agent, for the ratable benefit of the L/C Issuer, Lenders and
Secured Affiliates (collectively, the “Secured Parties”), shall be entitled to receive
payment in full of all of the Senior Debt (whether or not any or all of the Senior Debt has been
declared due and payable prior to the date on which such Senior Debt otherwise would have become
due and payable) before the Subordinated Creditor (or anyone claiming through or on its behalf
(including, without limitation, any receiver, trustee or other similar Person) is entitled to
receive or retain any payment or distribution of any kind or character on account of all or any of
the Subordinated Debt, and, to that end, any payment or distribution of any kind or character
(whether in cash, property or securities) that otherwise would be payable or deliverable upon or
with respect to the Subordinated Debt in any such Insolvency Proceeding (including, without
limitation, any payment that may be payable in respect of, or turnover of funds to be applied to,
the Subordinated Debt by reason of any other Indebtedness or obligations of Payor being
subordinated to payment of the Subordinated Debt) shall be paid or delivered forthwith directly to
the Administrative Agent, for the account of the Secured Parties, in the same form as so received
(with any necessary endorsement or assignment) for application (in the case of cash) to, or to be
held as collateral (in the case of noncash property or securities) for, the payment,

6

 

prepayment and/or cash collateralization of the Senior Debt until all of the Senior Debt shall
have been paid in full.

          (d) So long as the Senior Debt shall not have been paid in full, the Subordinated Creditor
shall not (i) ask, demand, sue for, take or receive from Payor, directly or indirectly, in cash or
other property or by set-off or in any manner (including, without limitation, from or by way of
collateral), payment of all or any of the Subordinated Debt, except such payments as otherwise
expressly permitted herein when no Blockage Event has occurred and is continuing, (ii) commence, or
join with any creditor other than the Administrative Agent in commencing, or directly or indirectly
cause Payor to commence, or assist Payor in commencing, any Insolvency Proceeding, or (iii) request
or accept any collateral or other security for all or any portion of the Subordinated Debt. If the
Subordinated Creditor, in contravention hereof, shall commence, prosecute or participate in any of
the actions, suits or proceedings referred to above in this paragraph, then the Administrative
Agent may intervene and interpose as a defense or plea the terms of this Note in its own name or in
the name of the Subordinated Creditor.

          (e) Until such time as all of the Senior Debt has been paid in full, if any Insolvency
Proceeding is commenced by or against Payor, the Subordinated Creditor authorizes and empowers the
Administrative Agent to file proofs of claim of the Subordinated Debt on behalf of the Subordinated
Creditor in any statutory or non-statutory proceeding as the agent and attorney-in-fact for the
Subordinated Creditor if the Subordinated Creditor fails to file such proofs of claim on or before
the date that is ten (10) days prior to the date such proofs of claim must be filed by the
Subordinated Creditor in accordance with applicable law; provided, however, that
(i) the foregoing authorization and empowerment (A) imposes no obligation on the Administrative
Agent to take any such action, and (B) is granted only for the specific and limited purpose for
which it is given, and (ii) the Administrative Agent shall have, prior to taking any such action,
given 15 days prior written notice (which notice may be given up to 60 days prior to the expiration
of the time to file such claim) to the Subordinated Creditor that it intends to file such claim or
proof of debt. Notwithstanding anything to the contrary herein, in no event may the Administrative
Agent, any Lender or any Secured Affiliate vote or take any other action related to any claim with
respect to the Subordinated Debt on behalf of the Subordinated Creditor, and such agency and
appointment of attorney-in-fact shall not extend to any such right to vote or take any other action
related to any such claim of the Subordinated Creditor, which rights to vote and take action the
Subordinated Creditor is hereby authorized to exercise and take.

          (f) All payments or distributions upon or with respect to the Subordinated Debt that are
received by the Subordinated Creditor contrary to the provisions of this Note shall be received in
trust for the benefit of the Administrative Agent, shall be segregated from other property or funds
of the Subordinated Creditor and shall be paid or delivered forthwith directly to the
Administrative Agent, for the account of the Secured Parties, in the same form as so received (with
any necessary endorsement or assignment), to be applied (in the case of cash) to, or held as
collateral (in the case of noncash property or securities) for, the payment, prepayment and/or cash
collateralization of the Senior Debt until all of the Senior Debt shall have been paid in full.

          (g) To the extent that Payor, the Subordinated Creditor or any of their respective
subsidiaries or any other Credit Party or guarantor of or provider of collateral for the

7

 

Senior Debt shall make any payment on the Senior Debt that is subsequently invalidated,
declared to be fraudulent or preferential or set aside or is required to be repaid to a trustee,
receiver or any other party under any applicable Insolvency Law or equitable cause (any such
payment being a “Voided Payment”), then to the extent of such Voided Payment, that portion
of the Senior Debt that had been previously satisfied by such Voided Payment shall be reinstated
and continue in full force and effect as if such Voided Payment had never been made. To the extent
that the Subordinated Creditor shall have received any payments subsequent to the date of the
initial receipt of such Voided Payment by the Administrative Agent or any of the Secured Parties
and such payments have not been invalidated, declared to be fraudulent or preferential or set aside
or required to be repaid to a trustee, receiver or any other party under any applicable Insolvency
Law or equitable cause, the Subordinated Creditor shall be obligated and hereby agrees that any
such payment so made or received shall be deemed to have been received in trust for the benefit of
the Administrative Agent, and the Subordinated Creditor (by its acceptance hereof) hereby agrees to
pay to the Administrative Agent, upon demand, the full amount so received by the Subordinated
Creditor during such period of time to the extent necessary to fully restore to the Secured Parties
the amount of such Voided Payment, which amount shall be applied as set forth in the immediately
preceding paragraph.

          (h) The Subordinated Creditor will not:

          (i) (A) cancel or otherwise discharge any of the Subordinated Debt (except (1) upon
payment in full of the Senior Debt, (2) by a conversion of all or any part of the
Subordinated Debt to a capital contribution to Payor in return for Equity Interests of Payor
or (3) as otherwise permitted by the Credit Agreement), or (B) convert or exchange any of
the Subordinated Debt into or for any other Indebtedness (other than any other Subordinated
Debt);

          (ii) sell, assign, pledge, encumber or otherwise dispose of any of the Subordinated
Debt other than the pledge of the instruments and agreements evidencing the Subordinated
Debt to the Global Administrative Agent (as defined in the Parent Credit Agreement) pursuant
to the Parent Credit Agreement or any of the other Combined Loan Documents (as defined in
the Parent Credit Agreement) or a transfer or other disposition of such instruments and
agreements in connection with a foreclosure under the Parent Credit Agreement or any of the
other Combined Loan Documents (as defined in the Parent Credit Agreement); or

          (iii) contest, or cause or encourage any other Person to contest, at any time, the
validity, perfection, priority or enforceability of the subordination provisions of this
Note, the Senior Debt, the agreements evidencing the Senior Debt or the security interests
or the Liens granted to the Administrative Agent or any of the other Secured Parties
pursuant thereto.

          (i) Subject to the payment in full of the Senior Debt, the Subordinated Creditor shall be
subrogated to the rights of the Lenders and the Secured Affiliates to receive payments or
distributions of assets of Payor in respect of the Senior Debt until the Subordinated Debt shall be
paid in full. For the purposes of such subrogation, payments or distributions to the
Administrative Agent, for the account of the Lenders and the Secured Affiliates, of any cash,

8

 

property or securities to which the Subordinated Creditor would be entitled except for the
provisions of this Note shall be deemed, as between Payor and its creditors (other than the
Lenders, the Secured Affiliates and the Subordinated Creditor), to be a payment by Payor to or on
account of the Subordinated Debt, it being understood that the provisions of this Section
7(i) are, and are intended solely, for the purpose of defining the relative rights of the
Subordinated Creditor, on the one hand, and the Administrative Agent, the Lenders and the Secured
Affiliates, on the other hand.

          (j) The Lenders or other holders of the Senior Debt may, at any time and from time to time,
without any consent of or notice to the Subordinated Creditor or any other holder of the
Subordinated Debt and without impairing or releasing the obligations of the Subordinated Creditor
hereunder:

          (i) change the manner, place or terms of payment of, or change or extend the time of
payment of, or renew payment or change or extend the time or payment of, or renew or alter,
the Senior Debt (including any change in the rate of interest thereon), or amend, supplement
or otherwise modify in any manner any Loan Document or other instrument, agreement or other
document under which any of the Senior Debt is outstanding;

          (ii) sell, exchange, release, not perfect and otherwise deal with any of the property
or assets of any Person at any time pledged, assigned or mortgaged to secure the Senior
Debt;

          (iii) release any Person liable in any manner under or in respect of the Senior Debt;

          (iv) exercise or refrain from exercising any rights against Payor, any of the other
Credit Parties or any of their respective Subsidiaries or any other Person;

          (v) apply to the Senior Debt any sums from time to time received by or on behalf of the
Administrative Agent or any of the Secured Parties; or

          (vi) sell, assign, transfer or exchange any of the Senior Debt.

          (k) Each of Payor and the Subordinated Creditor will, if reasonably requested by the
Administrative Agent, further mark their respective books of account in such a manner as shall be
effective to give proper notice of the effect of the subordination provisions of this Note. Each of
Payor and the Subordinated Creditor will, at Payor’s sole expense and at any time and from time to
time, promptly execute and deliver all further instruments and documents, and take all further
actions, that may be necessary or that the Administrative Agent may reasonably deem advisable and
may request in order to protect any right or interest granted or intended to be granted under the
subordination provisions of this Note or to enable the Administrative Agent or any of the other
Secured Parties to exercise and enforce its rights and remedies hereunder.

          (l) The Subordinated Creditor shall, upon reasonable request from time to time, from Payor,
any Secured Party or any other holder of Senior Debt or any party who intends to extend Senior Debt
to Payor, provide to the holder(s) of Senior Debt or any such prospective

9

 

holder(s) of Senior Debt a written acknowledgment by the Subordinated Creditor addressed to
such holder(s) of Senior Debt to the effect that such holder of Senior Debt is a holder of the
Senior Debt entitled to the benefits of this Note, or, in the case of a prospective holder of
Senior Debt, to the effect that the credit to be extended by such prospective holder will be Senior
Debt and that such prospective holder will be entitled to the benefits of this Note.

          (m) Payor acknowledges and agrees that the provisions of this Note, including, without
limitation, the foregoing subordination provisions are, and are intended to be, an inducement and a
consideration to each Secured Party, whether the Senior Debt held by such Secured Party was created
or acquired before or after the issuance of this Note, to acquire and continue to hold, or to
continue to hold, such Senior Debt and such Secured Party shall be deemed conclusively to have
relied on the provisions of this Note, including, without limitation, such subordination
provisions, in acquiring and continuing to hold, or in continuing to hold, such Senior Debt.

          (n) The foregoing provisions regarding subordination are and are intended solely for the
purpose of defining the relative rights of the holders of the Senior Debt, on the one hand, and the
holders of the Subordinated Debt, on the other hand. Such provisions are for the benefit of the
holders of the Senior Debt and shall inure to the benefit of, and shall be enforceable by, the
Administrative Agent, on behalf of itself and the other Secured Parties, directly against the
holders of the Subordinated Debt, and no holder of the Senior Debt shall be prejudiced in its right
to enforce the subordination of any of the Subordinated Debt by any act or failure to act by Payor
or any Person in custody of its property or assets. The subordination provisions herein shall
constitute a continuing offer to each and every holder of Senior Debt from time to time and such
holders are intended third party beneficiaries hereof. Nothing contained in the foregoing
provisions is intended to or shall impair, as between Payor and the holders of the Subordinated
Debt, the obligations of Payor to such holders.

     8. WAIVER. PAYOR HEREBY WAIVES PROMPTNESS, DILIGENCE, PRESENTMENT FOR PAYMENT,
DEMAND, NOTICE OF DISHONOR AND PROTEST AND ANY OTHER NOTICE WITH RESPECT TO THIS NOTE.

     9. Amendments, Etc. None of the provisions of this Note may be waived, amended,
supplemented or otherwise modified except in a writing signed by Payor and the Subordinated
Creditor; provided, however, that, until the Senior Debt has been paid in full, no
amendment, waiver or modification of this Note (including, without limitation, the subordination
provisions hereof), and no consent to any departure herefrom, that would violate Section 7.17 of
the Credit Agreement shall be effective unless the same shall be in writing and also signed by the
Administrative Agent, and then, in each case, such waiver, modification or consent shall be
effective only in the specific instance and for the specific purpose for which given.

     10. No Waiver; Cumulative Remedies. No failure on the part of the Subordinated
Creditor or the Administrative Agent to exercise, and no delay in exercising, any right, power or
privilege hereunder shall operate as a waiver thereof or a consent thereto; nor shall a single or
partial exercise of any such right, power or privilege preclude any other or further exercise
thereof or the exercise of any other right, power or privilege. The remedies provided herein are
cumulative and are not exclusive of any remedies provided by applicable law or in equity.

10

 

     11. Notices. All notices and other communications provided for herein shall be in
writing and shall be delivered by hand or overnight courier service, mailed by certified or
registered mail or sent by facsimile or electronic mail (e-mail), as follows:

	 	 	 	 	 
	 

	 	If to Payor:
	 	Quicksilver Gas Services LP
	 

	 	 	 	c/o Quicksilver Gas Services GP LLC
	 

	 	 	 	777 West Rosedale Street, Suite 300
	 

	 	 	 	Fort Worth, Texas 76104
	 

	 	 	 	Attention: MarLu Hiller
	 

	 	 	 	FAX: 817-665-5016
	 

	 	 	 	Electronic Mail (E-mail): mhiller@qrinc.com
	 
	 	 	 	 
	 

	 	If to the Subordinated
Creditor:
	 	Quicksilver Resources Inc.
	 

	 	 	 	777 West Rosedale Street, Suite 300
	 

	 	 	 	Fort Worth, Texas 76104
	 

	 	 	 	Attention: MarLu Hiller
	 

	 	 	 	FAX: 817-665-5016
	 

	 	 	 	Electronic Mail (E-mail): mhiller@qrinc.com
	 
	 	 	 	 
	 

	 	If to the Administrative
Agent:
	 	Bank of America, N.A.
	 

	 	 	 	700 Louisiana Street, 8th Floor
	 

	 	 	 	TX4-213-08-14
	 

	 	 	 	Houston, Texas 77002
	 

	 	 	 	Attention: Ronald E. McKaig
	 

	 	 	 	FAX: 713-247-7286
	 

	 	 	 	Electronic Mail (E-mail):
	 

	 	 	 	ronald.e.mckaig@bankofamerica.com

     12. Assignment. This Note shall be binding upon the successors and assigns of Payor
and shall inure to the benefit of the Subordinated Creditor and its successors and assigns;
provided, however, that Payor shall not assign, delegate or otherwise transfer any of its rights or
obligations under this Note without the prior written consent of the Subordinated Creditor.

     13. No Credit Support. Payor and the Subordinated Creditor (by its acceptance hereof)
acknowledge and agree that this Note is not secured by any mortgage, Lien, pledge, charge,
financing statement, security interest, hypothecation, or other security instrument of any type.
Payor and the Subordinated Creditor (by its acceptance hereof) further acknowledge and agree that
this Note is not supported directly or indirectly by any Guarantee of any person or entity. Payor
and the Subordinated Creditor (by its acceptance hereof) further agree that Payor will not grant,
or cause any other Credit Party to grant any Lien securing this Note or provide any Guarantee for
the payment of this Note until the Senior Debt has been paid in full.

     14. Severability. Any provision of this Note which is prohibited or unenforceable in
any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition
or unenforceability without invalidating the remaining provisions hereof; and any such prohibition

11

 

or unenforceability in any jurisdiction shall not invalidate or render unenforceable such
provision in any other jurisdiction.

     15. Usury Savings Clause. (a) It is the intention of the parties hereto to comply
with applicable state and federal usury laws (now or hereafter enacted). Accordingly,
notwithstanding any provision to the contrary in this Note, in no event (including, but not limited
to, prepayment or acceleration of the maturity of any obligation) shall this Note require the
payment or permit the collection of interest in excess of the Highest Lawful Rate. If, under any
circumstance whatsoever, any provision of this Note shall provide for the payment or collection of
interest in excess of the Highest Lawful Rate, then, ipso facto, the obligation to
be fulfilled shall be reduced to the limit of such validity, and if from any such circumstances the
Subordinated Creditor shall ever receive anything of value as interest or deemed interest by
applicable law under this Note or otherwise an amount that would exceed the Highest Lawful Rate,
such amount that would be excessive interest shall be applied to the reduction of the principal
amount owing under this Note or on account of any other indebtedness of Payor to the Subordinated
Creditor, and not to the payment of interest, or if such excessive interest exceeds the unpaid
balance of principal of this Note and such other indebtedness, such excess shall be refunded to
Payor. In determining whether or not the interest paid or payable with respect to any indebtedness
of Payor to the Subordinated Creditor, under any specified contingency, exceeds the Highest Lawful
Rate, Payor and the Subordinated Creditor shall, to the maximum extent permitted by applicable law,
(i) characterize any non-principal payment as an expense, fee or premium rather than as interest,
(ii) exclude voluntary prepayments and the effects thereof, (iii) amortize, prorate, allocate and
spread the total amount of interest throughout the full term of such indebtedness so that interest
thereon does not exceed the maximum amount permitted by applicable law, and/or (iv) allocate
interest between portions of such indebtedness, to the end that no such portion shall bear interest
at a rate greater than that permitted by applicable law.

         (b) If at any time the interest rate hereunder (the “Stated Rate”) exceeds the Highest
Lawful Rate, then the rate at which interest shall accrue hereunder shall automatically be limited
to the Highest Lawful Rate, and shall remain at the Highest Lawful Rate until the total amount of
interest accrued hereunder equals the total amount of interest that would have accrued but for the
operation of this sentence. Thereafter, interest shall accrue at the Stated Rate unless and until
the Stated Rate again exceeds the Highest Lawful Rate, in which case the immediately preceding
sentence shall apply.

     16. Jurisdiction, Etc. (a) THIS NOTE SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS
OF THE STATE OF TEXAS. Payor hereby irrevocably and unconditionally submits, for itself and its
property, to the nonexclusive jurisdiction of the United States District Court for the Northern
District of Texas and of any Texas State court sitting in Tarrant or Dallas County, Texas, and any
appellate court from any thereof, for purposes of any action or proceeding arising out of or
relating to this Note, or for recognition or enforcement of any judgment, and Payor hereby
irrevocably and unconditionally agrees that all claims in respect of any such action or proceeding
may be heard and determined in any such court. Payor agrees that a final judgment in any such
action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the
judgment or in any other manner provided by law. Nothing in this Note shall affect any right that
the Subordinated Creditor may otherwise have to bring any action or proceeding relating to this
Note in the courts of any jurisdiction.

12

 

          (b) Payor irrevocably and unconditionally waives, to the fullest extent it may legally and
effectively do so, any objection that it may now or hereafter have to the laying of venue of any
suit, action or proceeding arising out of or relating to this Note in any such court. Payor hereby
irrevocably waives, to the fullest extent permitted by applicable law, the defense of an
inconvenient forum to the maintenance of such action or proceeding in any such court.

          (c) Payor agrees to not assert any claim against the Subordinated Creditor, any of its
affiliates or any of their respective directors, officers, attorneys, agents and advisers, for
special, indirect, consequential or punitive damages arising out of or otherwise relating to this
Note, any of the transactions contemplated herein or the actual or proposed use of the loan
evidenced by this Note.

     17. Relationship of the Parties. Notwithstanding any business or personal
relationship between Payor and the Subordinated Creditor, or any officer, director or employee of
the Subordinated Creditor, that may exist or have existed, the relationship between Payor and the
Subordinated Creditor under and with respect to this Note is solely that of debtor and creditor,
the Subordinated Creditor has no fiduciary or other special relationship with Payor by virtue of
this Note, Payor and the Subordinated Creditor are not partners or joint venturers, and no term or
condition of any of this Note shall be construed so as to deem the relationship between Payor and
the Subordinated Creditor to be other than that of debtor and creditor.

     18. Right of Set-off. Subject to the subordination provisions contained in
Section 7 hereof, the Subordinated Creditor is hereby authorized at any time and from time
to time, to the fullest extent permitted by applicable law, to set off and apply any and all
indebtedness, obligations or liabilities at any time owing by the Subordinated Creditor to or for
the credit or the account of Payor against any and all of the obligations of Payor now or hereafter
existing under this Note, whether or not the Subordinated Creditor shall have made any demand under
this Note and although such obligations may be unmatured. The rights of the Subordinated Creditor
under this Section 18 are in addition to other rights and remedies (including, without
limitation, other rights of set off) which the Subordinated Creditor may have.

     19. Costs and Expenses. Subject to the subordination provisions contained in
Section 7 hereof, Payor agrees to pay on demand all costs and expenses incurred by the
Subordinated Creditor in connection with the preparation, execution, delivery, administration,
modification and amendment of this Note, including, without limitation, the reasonable attorneys’
fees and expenses of the Subordinated Creditor with respect thereto and with respect to advising
the Subordinated Creditor as to its rights and responsibilities under this Note. Subject to the
subordination provisions contained in Section 7 hereof, Payor further agrees to pay on
demand all losses, costs and expenses, if any (including attorneys’ fees and expenses), in
connection with the enforcement (whether through negotiations, legal proceedings or otherwise) of
this Note, including, without limitation, attorneys’ fees and expenses in connection with the
enforcement of rights under this Section 19. In addition, Payor shall pay any and all
stamp and other taxes payable or determined to be payable in connection with the execution and
delivery of this Note, and agrees to save the Subordinated Creditor harmless from and against any
and all liabilities with respect to or resulting from any delay in paying or omission to pay such
taxes.

13

 

     20. Representations and Warranties. Payor hereby represents and warrants to the
Subordinated Creditor that (a) Payor’s execution, delivery and performance of this Note have been
authorized by all necessary action; (b) it has the requisite power and authority to execute,
deliver and perform its obligations under this Note; (c) this Note has been duly executed and
delivered to the Subordinated Creditor by Payor; and (d) this Note is the legal, valid and binding
obligation of Payor, enforceable against Payor in accordance with its terms, subject to applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforceability of
creditors’ rights generally and by general principles of equity.

     21. WAIVER OF JURY TRIAL. PAYOR HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL
BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS NOTE.

     22. GOVERNING LAW. THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD TO CONFLICTS OF LAW PRINCIPLES THEREOF.

     23. ENTIRE AGREEMENT. THIS NOTE REPRESENTS THE FINAL, ENTIRE AGREEMENT BETWEEN THE
PARTIES REGARDING THE SUBJECT MATTER HEREOF AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES.

     24. No Recourse. Notwithstanding anything to the contrary in this Note, in no event
shall the Subordinated Creditor have any recourse against the assets of the Subordinated Creditor
or any of its Restricted Subsidiaries (as such term is defined in the First Supplemental Indenture,
dated as of March 16, 2006, by and among the Subordinated Creditor, the subsidiary guarantors
parties thereto and The Bank of New York, as Trustee (as successor in interest to JPMorgan Chase
Bank, National Association), as such First Supplemental Indenture may be amended, modified,
restated, supplemented or replaced from time to time, or any comparable term in any other
documentation now or hereafter evidencing any Indebtedness of the Subordinated Creditor) for any of
the Subordinated Debt pursuant to this Note.

[Signature on Following Page]

14

 

     IN WITNESS WHEREOF, Payor has caused this instrument to be duly executed and delivered to the
Subordinated Creditor by a Responsible Officer of the general partner of Payor on behalf of Payor
as of August 10, 2007.

	 	 	 	 	 
	 	 	QUICKSILVER GAS SERVICES LP,

a Delaware limited partnership
	 
	 	 	 	 
	 

	 	By:
	 	Quicksilver Gas Services GP LLC,
	 

	 	 	 	a Delaware limited liability company, its

General Partner

	 	 	 	 	 
	 	 	 
	 	By:  	                                                   /s/ MarLu Hiller
 	 
	 	 	MarLu Hiller, 	 
	 	 	Vice President – Treasurer 	 
	 

[Signature Page]

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