Document:

EX=4.1

Exhibit 4.1

FIRST AMENDMENT TO ADMINISTRATION AGREEMENT

     THIS FIRST AMENDMENT TO ADMINISTRATION AGREEMENT (this “Amendment”), dated as of July
31, 2009, between WORLD FINANCIAL NETWORK CREDIT CARD MASTER NOTE TRUST, a statutory trust
organized and existing under the laws of the State of Delaware (“Issuer”) and WORLD
FINANCIAL NETWORK NATIONAL BANK, a national banking association, as administrator
(“Administrator”), amends the Administration Agreement, dated as of August 1, 2001 (the
“Agreement”), between Issuer and Administrator. Any capitalized term used herein but not
herein defined shall have the meaning assigned to it in the Agreement.

     WHEREAS, the parties hereto desire to amend the Agreement to make certain specified changes
below;

     NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration
(the receipt and sufficiency of which are hereby acknowledged), the parties hereto agree as
follows:

     SECTION 1. AMENDMENT. Section 1(b) of the Agreement is hereby amended by adding a new
clause (v) as follows:

     “(v) Notwithstanding anything in this Agreement or the Transaction Documents to
the contrary, the Administrator shall, on behalf of the Issuer, execute and deliver
any agreements, reports, undertakings, certifications, notices or authorizations
(collectively the “TALF Related Documents”) required or that it deems
advisable for purposes of the Term Asset-Backed Securities Loan Facility created and
authorized by the rules of the United States Department of the Treasury and the
Federal Reserve, in such form as the Transferor shall approve as evidenced
conclusively by the Administrator’s execution thereof. For all purposes of this
Agreement, the TALF Related Documents shall be deemed to constitute “Related
Agreements” as defined in this Agreement.”

     SECTION 2. EFFECTIVENESS. This Amendment shall become effective as of the date first
set above.

     SECTION 3. LIMITATION ON THE LIABILITY OF OWNER TRUSTEE. Except with respect to its
consent to this Amendment in its individual capacity pursuant to Section 11 of the Agreement, this
Amendment has been signed by U.S. Bank Trust National Association not in its individual capacity,
but solely in its capacity as Owner Trustee of Issuer and in no event shall U.S. Bank Trust
National Association in its individual capacity or any beneficial owner of Issuer have any
liability for the representations, warranties, covenants, agreements or other obligations of Issuer
hereunder, as to all of which recourse shall be had solely to the assets of the Issuer. For all
purposes of this Amendment, in the performance of any duties or obligations hereunder, Owner
Trustee (as such or in its individual capacity) shall be subject to, and entitled to the benefits
of, the terms and provisions of the Trust Agreement.

     SECTION 4. MISCELLANEOUS. (a) As herein amended, the Agreement (as so amended, the
“Amended Agreement”), shall remain in full force and effect and is hereby ratified

 

 

and confirmed in all respects. After the effectiveness hereof, all references in the
Agreement to “the Agreement,” “this Agreement,” “hereof,” “hereto” or words of similar import shall
in each case be deemed to refer to the Amended Agreement.

     (b) This Amendment may be executed in any number of counterparts and by different parties
hereto in separate counterparts, each of which when so executed shall be deemed to be an original
and all of which when taken together shall constitute one and the same agreement.

     (c) THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,
WITHOUT REFERENCE TO ITS CONFLICT OF LAW PROVISIONS AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE
PARTIES HEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

[REMAINDER OF THIS PAGE INTENTIONALLY BLANK]

2

 

     IN WITNESS WHEREOF, the undersigned have caused this Amendment to be duly executed and
delivered by their respective duly authorized officers as of the date hereof.

	 	 	 	 	 	 	 
	 	 	WORLD FINANCIAL NETWORK CREDIT CARD MASTER NOTE
TRUST, as Issuer	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	U.S. BANK TRUST NATIONAL	 	 
	 

	 	 	 	ASSOCIATION, not in its individual capacity

but solely as Owner Trustee	 	 
	 
	 	 	 	 	 	 
	 

	 	 	 	/s/ Mildred F. Smith
 

Name: Mildred F. Smith

Title: Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	WORLD FINANCIAL NETWORK NATIONAL BANK, as
Administrator	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ Ronald C. Reed
 

Ronald C. Reed
	 	 
	 

	 	Title:
	 	Assistant Treasurer	 	 

	 	 	 	 	 
	Acknowledged and Accepted:	 	 
	 
	 	 	 	 
	WFN CREDIT COMPANY, LLC,

as Transferor	 	 
	 
	 	 	 	 
	By: 

Name:

	 	/s/ Daniel T. Groomes
 

Daniel T. Groomes
	 	 
	Title:

	 	President	 	 

S-1

 

CONSENT

     The undersigned hereby consents to the Amendment set forth above to the extent required by
Section 11 of the Agreement.

	 	 	 	 	 	 	 
	 	 	U.S. BANK TRUST NATIONAL ASSOCIATION, in its
individual capacity and not in its individual
capacity, but solely as Owner Trustee	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ Mildred F. Smith
 

Mildred F. Smith

Vice President
	 	 

S-2exv4w1

Exhibit 4.1

EXECUTION VERSION

 

Arch Coal, Inc.

AS ISSUER

Allegheny Land Company

Arch Coal Sales Company, Inc.

Arch Coal Terminal, Inc.

Arch Energy Resources, LLC

Arch Reclamation Services, Inc.

Ark Land Company

Ark Land KH, Inc.

Ark Land LT, Inc.

Ark Land WR, Inc.

Ashland Terminal, Inc.

Coal-Mac, Inc.

Cumberland River Coal Company

Lone Mountain Processing, Inc.

Mingo Logan Coal Company

Mountain Gem Land, Inc.

Mountain Mining, Inc.

Mountaineer Land Company

Prairie Holdings, Inc.

Western Energy Resources, Inc.

AS GUARANTORS

AND

U.S. Bank National Association,

AS TRUSTEE

 

Indenture

Dated as of July 31, 2009

 

$600,000,000

8.750 % Senior Notes due 2016

 

 

 

CROSS-REFERENCE TABLE

	 	 	 
	TIA Sections	 	Indenture Sections
	310 (a)(1)
	 	7.10; 12.01
	(a)(2)
	 	12.01
	(a)(3)
	 	7.12; 12.01
	(a)(4)
	 	12.01
	(a)(5)
	 	7.10; 12.01
	(b)
	 	7.03; 7.10; 12.01
	(c)
	 	12.01
	311 (a)
	 	7.03; 7.11; 12.01
	(b)
	 	7.03; 7.11; 12.01
	(c)
	 	7.03; 7.11; 12.01
	312 (a)
	 	2.05(a); 12.01
	(b)
	 	12.01; 12.03
	(c)
	 	12.01; 12.03
	313 (a)
	 	7.06; 12.01
	(b)(1)
	 	7.06; 12.01
	(b)(2)
	 	7.06; 7.07; 12.01
	(c)
	 	7.05; 7.06; 12.01; 12.02(b)
	(d)
	 	7.06; 12.01
	314 (a)(1)-(3)
	 	4.17; 12.01
	(a)(4)
	 	12.01
	(b)
	 	12.01
	(c)(1)
	 	12.01; 12.04(a)
	(c)(2)
	 	12.01; 12.04(b)
	(d)
	 	12.01
	(e)
	 	12.01; 12.05
	(f)
	 	12.01
	315 (a)
	 	7.01(b); 12.01
	(b)
	 	7.05; 12.01
	(c)
	 	7.01(a); 12.01
	(d)
	 	7.01(c); 12.01
	(e)
	 	6.11; 12.01
	316 (a) (last sentence)
	 	2.09; 12.01
	(a)(1)(A)
	 	6.05; 12.01
	(a)(1)(B)
	 	6.04; 12.01
	(a)(2)
	 	12.01
	(b)
	 	6.07; 12.01
	(c)
	 	6.15; 12.01
	317 (a)(1)
	 	6.08; 12.01
	(a)(2)
	 	6.09;12.01
	(b)
	 	2.04; 12.01
	318 (a)
	 	12.01
	(b)
	 	12.01
	(c)
	 	12.01

 

			
	 	 	Note: The Cross-Reference Table shall not for any purpose be deemed to be a part of the Indenture.

 

 

TABLE OF CONTENTS

	 	 	 	 	 
	Article One

DEFINITIONS AND INCORPORATION BY REFERENCE

	 
	 	 	 	 
	SECTION 1.01. Definitions
	 	 	2	 
	SECTION 1.02. Other Definitions
	 	 	31	 
	SECTION 1.03. Incorporation by Reference of Trust Indenture Act
	 	 	31	 
	SECTION 1.04. Rules of Construction
	 	 	32	 
	 
	 	 	 	 
	Article Two

THE NOTES

	 
	 	 	 	 
	SECTION 2.01. The Notes
	 	 	32	 
	SECTION 2.02. Execution and Authentication
	 	 	34	 
	SECTION 2.03. Registrar, Transfer Agent and Paying Agent
	 	 	35	 
	SECTION 2.04. Paying Agent to Hold Money in Trust
	 	 	36	 
	SECTION 2.05. Holder Lists and Registration Rights Agreements
	 	 	36	 
	SECTION 2.06. Transfer and Exchange
	 	 	37	 
	SECTION 2.07. Replacement Notes
	 	 	41	 
	SECTION 2.08. Outstanding Notes
	 	 	41	 
	SECTION 2.09. Notes Held by Arch Coal
	 	 	41	 
	SECTION 2.10. Certificated Notes
	 	 	41	 
	SECTION 2.11. Cancellation
	 	 	42	 
	SECTION 2.12. Defaulted Interest
	 	 	42	 
	SECTION 2.13. Computation of Interest
	 	 	43	 
	SECTION 2.14. CUSIP, ISIN and Common Code Numbers
	 	 	43	 
	SECTION 2.15. Issuance of Additional Notes and Exchange Notes
	 	 	44	 
	 
	 	 	 	 
	Article Three

REDEMPTION; OFFERS TO PURCHASE

	 
	 	 	 	 
	SECTION 3.01. Optional Redemption
	 	 	44	 
	SECTION 3.02. Notices to Trustee
	 	 	45	 
	SECTION 3.03. Selection of Notes to be Redeemed
	 	 	45	 
	SECTION 3.04. Notice of Redemption
	 	 	45	 
	SECTION 3.05. Effect of Notice of Redemption
	 	 	46	 
	SECTION 3.06. Deposit of Redemption Price
	 	 	46	 
	SECTION 3.07. Payment of Notes Called for Redemption
	 	 	47	 
	SECTION 3.08. Notes Redeemed in Part
	 	 	47	 
	 
	 	 	 	 
	Article Four

COVENANTS

	 
	 	 	 	 
	SECTION 4.01. Payment of Notes
	 	 	47	 
	SECTION 4.02. Corporate Existence
	 	 	47	 
	SECTION 4.03. Maintenance of Properties
	 	 	48	 
	SECTION 4.04. Insurance
	 	 	48	 
	SECTION 4.05. Statement as to Compliance
	 	 	48	 
	SECTION 4.06. Limitation on Debt
	 	 	49	 

i 

 

	 	 	 	 	 
	SECTION 4.07. Limitation on Liens
	 	 	51	 
	SECTION 4.08. Limitation on Restricted Payments
	 	 	52	 
	SECTION 4.09. Limitation on Asset Sales
	 	 	55	 
	SECTION 4.10. Limitation on Transactions with Affiliates
	 	 	57	 
	SECTION 4.11. Change of Control
	 	 	59	 
	SECTION 4.12. Limitation on Sale and Leaseback Transactions
	 	 	60	 
	SECTION 4.13. Guarantees by Restricted Subsidiaries
	 	 	60	 
	SECTION 4.14. Limitation on Restrictions on Distributions from Restricted
Subsidiaries
	 	 	61	 
	SECTION 4.15. Designation of Restricted and Unrestricted Subsidiaries
	 	 	62	 
	SECTION 4.16. Payment of Taxes and Other Claims
	 	 	64	 
	SECTION 4.17. Reports to Holders
	 	 	64	 
	SECTION 4.18. Legal Existence
	 	 	64	 
	SECTION 4.19. Waiver of Stay, Extension or Usury Laws
	 	 	65	 
	SECTION 4.20. Further Instruments and Acts
	 	 	65	 
	SECTION 4.21. Covenant Termination
	 	 	65	 
	 
	 	 	 	 
	Article Five

CONSOLIDATION, MERGER OR SALE OF ASSETS

	 
	 	 	 	 
	SECTION 5.01. Consolidation, Merger or Sale of Assets
	 	 	65	 
	SECTION 5.02. Successor Substituted
	 	 	68	 
	 
	 	 	 	 
	Article Six

DEFAULTS AND REMEDIES

	 
	 	 	 	 
	SECTION 6.01. Events of Default
	 	 	68	 
	SECTION 6.02. Acceleration
	 	 	70	 
	SECTION 6.03. Other Remedies
	 	 	72	 
	SECTION 6.04. Waiver of Past Defaults
	 	 	72	 
	SECTION 6.05. Control by Majority
	 	 	72	 
	SECTION 6.06. Limitation on Suits
	 	 	73	 
	SECTION 6.07. Unconditional Right of Holders to Receive Payment
	 	 	73	 
	SECTION 6.08. Collection Suit by Trustee
	 	 	73	 
	SECTION 6.09. Trustee May File Proofs of Claim
	 	 	74	 
	SECTION 6.10. Application of Money Collected
	 	 	74	 
	SECTION 6.11. Undertaking for Costs
	 	 	75	 
	SECTION 6.12. Restoration of Rights and Remedies
	 	 	75	 
	SECTION 6.13. Rights and Remedies Cumulative
	 	 	75	 
	SECTION 6.14. Delay or Omission Not Waiver
	 	 	75	 
	SECTION 6.15. Record Date 
	 	 	75	 
	SECTION 6.16. Waiver of Stay or Extension Laws
	 	 	76	 
	 
	 	 	 	 
	Article Seven

TRUSTEE

	 
	 	 	 	 
	SECTION 7.01. Duties of Trustee
	 	 	76	 
	SECTION 7.02. Certain Rights of Trustee
	 	 	77	 
	SECTION 7.03. Individual Rights of Trustee
	 	 	78	 
	SECTION 7.04. Trustee’s Disclaimer
	 	 	78	 

ii 

 

	 	 	 	 	 
	SECTION 7.05. Notice of Defaults
	 	 	79	 
	SECTION 7.06. Reports by Trustee to Holders
	 	 	79	 
	SECTION 7.07. Compensation and Indemnity
	 	 	79	 
	SECTION 7.08. Replacement of Trustee
	 	 	80	 
	SECTION 7.09. Successor Trustee by Merger
	 	 	81	 
	SECTION 7.10. Eligibility: Disqualification
	 	 	82	 
	SECTION 7.11. Preferential Collection of Claims Against Arch Coal
	 	 	82	 
	SECTION 7.12. Appointment of Co-Trustee
	 	 	82	 
	 
	 	 	 	 
	Article Eight

DEFEASANCE; SATISFACTION AND DISCHARGE

	 
	 	 	 	 
	SECTION 8.01. Arch Coal’s Option to Effect Defeasance or Covenant Defeasance
	 	 	83	 
	SECTION 8.02. Defeasance and Discharge
	 	 	84	 
	SECTION 8.03. Covenant Defeasance
	 	 	84	 
	SECTION 8.04. Conditions to Defeasance
	 	 	84	 
	SECTION 8.05. Satisfaction and Discharge of Indenture
	 	 	85	 
	SECTION 8.06. Survival of Certain Obligations
	 	 	86	 
	SECTION 8.07. Acknowledgment of Discharge by Trustee
	 	 	86	 
	SECTION 8.08. Application of Trust Money
	 	 	87	 
	SECTION 8.09. Repayment to Arch Coal
	 	 	87	 
	SECTION 8.10. Indemnity for Government Securities
	 	 	87	 
	SECTION 8.11. Reinstatement
	 	 	87	 
	 
	 	 	 	 
	Article Nine

AMENDMENTS AND WAIVERS

	 
	 	 	 	 
	SECTION 9.01. Without Consent of Holders
	 	 	87	 
	SECTION 9.02. With Consent of Holders
	 	 	88	 
	SECTION 9.03. Compliance with Trust Indenture Act
	 	 	89	 
	SECTION 9.04. Effect of Supplemental Indentures
	 	 	89	 
	SECTION 9.05. Notation on or Exchange of Notes
	 	 	90	 
	SECTION 9.06. Payment for Consent
	 	 	90	 
	SECTION 9.07. Notice of Amendment or Waiver
	 	 	90	 
	SECTION 9.08. Trustee to Sign Supplemental Indentures
	 	 	90	 
	 
	 	 	 	 
	Article Ten

GUARANTEE

	 
	 	 	 	 
	SECTION 10.01. Note Guarantee
	 	 	90	 
	SECTION 10.02. Subrogation
	 	 	91	 
	SECTION 10.03. Release of Guarantors
	 	 	92	 
	SECTION 10.04. Additional Guarantors
	 	 	92	 
	SECTION 10.05. Limitation of Guarantee
	 	 	93	 
	SECTION 10.06. Notation Not Required
	 	 	93	 
	SECTION 10.07. Successors and Assigns
	 	 	93	 
	SECTION 10.08. No Waiver
	 	 	93	 
	SECTION 10.09. Modification
	 	 	93	 

iii 

 

	 	 	 	 	 
	Article Eleven

HOLDERS’ MEETINGS

	 
	 	 	 	 
	SECTION 11.01. Purposes of Meetings
	 	 	93	 
	SECTION 11.02. Place of Meetings
	 	 	94	 
	SECTION 11.03. Call and Notice of Meetings
	 	 	94	 
	SECTION 11.04. Voting at Meetings
	 	 	94	 
	SECTION 11.05. Voting Rights, Conduct and Adjournment
	 	 	94	 
	SECTION 11.06. Revocation of Consent by Holders at Meetings
	 	 	95	 
	 
	 	 	 	 
	Article Twelve

MISCELLANEOUS

	 
	 	 	 	 
	SECTION 12.01. Trust Indenture Act Controls
	 	 	95	 
	SECTION 12.02. Notices
	 	 	95	 
	SECTION 12.03. Communication by Holders with Other Holders
	 	 	96	 
	SECTION 12.04. Certificate and Opinion as to Conditions Precedent
	 	 	97	 
	SECTION 12.05. Statements Required in Certificate or Opinion
	 	 	97	 
	SECTION 12.06. Rules by Trustee, Paying Agent and Registrar
	 	 	97	 
	SECTION 12.07. Legal Holidays
	 	 	97	 
	SECTION 12.08. Governing Law
	 	 	98	 
	SECTION 12.09. No Recourse Against Others
	 	 	98	 
	SECTION 12.10. Successors
	 	 	98	 
	SECTION 12.11. Multiple Originals
	 	 	98	 
	SECTION 12.12. Table of Contents, Cross-Reference Sheet and Headings
	 	 	98	 
	SECTION 12.13. Severability
	 	 	98	 

	 	 	 	 	 
	Exhibits
	 	 	 	 
	 
	 	 	 	 
	Exhibit A

	 	-
	 	Form of Note
	Exhibit B

	 	-
	 	Form of Transfer Certificate for Transfer from Restricted Global
Note to Regulation S Global Note
	Exhibit C

	 	-
	 	Form of Transfer Certificate for Transfer from Regulation S Global
Note to Restricted Global Note

iv 

 

          INDENTURE dated as of July 31, 2009 among Arch Coal, Inc., a Delaware corporation (“Arch Coal”
or the “Company”) and Allegheny Land Company, a Delaware corporation, Arch Coal Sales Company,
Inc., a Delaware corporation, Arch Coal Terminal, Inc., a Delaware corporation, Arch Energy
Resources, LLC, a limited liability company organized under the laws of Delaware, Arch Reclamation
Services, Inc., a Delaware corporation, Ark Land Company, a Delaware corporation, Ark Land KH,
Inc., a Delaware corporation, Ark Land LT, Inc., a Delaware corporation, Ark Land WR, Inc., a
Delaware corporation, Ashland Terminal, Inc., a Delaware corporation, Coal-Mac, Inc., a Kentucky
corporation, Cumberland River Coal Company, a Delaware corporation, Lone Mountain Processing, Inc.,
a Delaware corporation, Mingo Logan Coal Company, a Delaware corporation, Mountain Gem Land, Inc.,
a West Virginia corporation, Mountain Mining, Inc., a Delaware corporation, Mountaineer Land
Company, a Delaware corporation, Prairie Holdings, Inc., a Delaware corporation, Western Energy
Resources, Inc., a Delaware corporation (collectively the “Guarantors”) and U.S. Bank National
Association, a New York banking corporation (the “Trustee”).

RECITALS OF ARCH COAL AND THE GUARANTORS

          Arch Coal has duly authorized the execution and delivery of this Indenture to provide for the
issuance of its (i) 8.750% Senior Notes due 2016 issued on the date hereof (the “Original
Notes”), (ii) any additional Notes (“Additional Notes”) that may be issued on any other
Issue Date (as defined herein) and (iii) any 8.750% Senior Notes due 2016 that may be issued
pursuant to the Registration Rights Agreement (as defined herein) in exchange for any Original
Notes or Additional Notes (the “Exchange Notes,” and together with the Original Notes and
any Additional Notes, the “Notes”). Each Guarantor has duly authorized the execution and
delivery of this Indenture to provide for the issuance of its Guarantee. Each of Arch Coal and the
Guarantors has received good and valuable consideration for the execution and delivery of this
Indenture and the Guarantees, as the case may be. Each Guarantor will derive substantial direct
and indirect benefits from the issuance of the Notes. All necessary acts and things have been done
to make (i) the Notes, when duly issued and executed by Arch Coal and authenticated and delivered
hereunder, the legal, valid and binding obligations of Arch Coal, (ii) the Guarantees, when
executed by each Guarantor and delivered hereunder, the legal, valid and binding obligations of
each Guarantor and (iii) this Indenture a legal, valid and binding agreement of each of Arch Coal
and the Guarantor in accordance with the terms of this Indenture.

NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          For and in consideration of the premises and the purchase of the Notes by the Holders thereof,
it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders, as
follows:

1 

 

ARTICLE ONE

DEFINITIONS AND INCORPORATION BY REFERENCE

               SECTION 1.01. Definitions.

          “Additional Assets” means:

          (a) any Property (other than cash, Cash Equivalent and securities) to be owned by Arch
Coal or any of its Restricted Subsidiaries and used in a Permitted Business; or

          (b) Capital Stock of a Person that becomes a Restricted Subsidiary as a result of the
acquisition of such Capital Stock by Arch Coal or another Restricted Subsidiary from any
Person other than Arch Coal or an Affiliate of Arch Coal; provided, however, that, in the case
of this clause (b), such Restricted Subsidiary is primarily engaged in a Permitted Business.

     “Affiliate” of any specified Person means:

     (a) any other Person directly or indirectly controlling or controlled by or under direct
or indirect common control with such specified Person; or

     (b) any other Person who is a director or officer of:

               (1) such specified Person;

               (2) any Subsidiary of such specified Person; or

               (3) any Person described in clause (a) above.

For the purposes of this definition, “control,” when used with respect to any Person, means the
power to direct the management and policies of such Person, directly or indirectly, whether through
the ownership of voting securities, by contract or otherwise; and the terms “controlling” and
“controlled” have meanings correlative to the foregoing. For purposes of Section 4.09 and 4.10 of
this Indenture and the definition of “Additional Assets” only, “Affiliate” shall also mean any
beneficial owner of shares representing 5% or more of the total voting power of the Voting Stock
(on a fully diluted basis) of Arch Coal or of rights or warrants to purchase such Voting Stock
(whether or not currently exercisable) and any Person who would be an Affiliate of any such
beneficial owner pursuant to the first sentence hereof.

     “Applicable Premium” means with respect to any Note on any redemption date, the greater of:

     (1) 1.0% of the principal amount of such Note on such redemption date; and

     (2) the excess, if any, of (i) the present value at such redemption date of (A) the
redemption price of such Note at August 1, 2013 (each such redemption price being set
forth in the applicable table appearing in Section 3.01 of this Indenture), plus (B) all
required interest payments due on such Note through August 1, 2013

2

 

(excluding accrued but unpaid interest to the redemption date), computed using a
discount rate equal to the Treasury Rate as of such redemption date plus 50 basis points;
over (ii) the principal amount of such Note.

          “Arch Coal” has the meaning ascribed thereto in the preamble.

          “Arch Coal Notes” means all existing and future unsubordinated demand promissory notes issued
by Arch Coal to Arch Western as consideration for loans and advances made by Arch Western to Arch
Coal or any of its Affiliates (other than Arch Western or a Restricted Subsidiary of Arch Western)
required to be issued and pledged for the benefit of the holders of the Arch Western Notes and any
Permitted Refinancing Debt Incurred in respect thereof.

          “Arch Western” means Arch Western Resource LLC and any successor thereto.

          “Arch Western Notes” means the $950.0 million aggregate principal amount of 63/4% Senior Notes
due 2013 issued by Arch Western Finance, LLC issued pursuant to Aruch Western Notes Indenture.

          “Arch Western Notes Indenture” means the Indenture dated as of June 25, 2003 by and among Arch
Western Finance, LLC, Arch Coal, Inc., Arch Western Resources, LLC, Arch of Wyoming, LLC, Mountain
Coal Company L.L.C., Thunder Basin Coal Company L.L.C., and the Bank of New York, as trustee,
pursuant to which the Arch Western Notes were issued, as amended to the Issue Date.

          “Asset Sale” means any sale, lease, transfer, issuance or other disposition (or series of
related sales, leases, transfers, issuances or dispositions) by Arch Coal or any of its Restricted
Subsidiaries, including any disposition by means of a merger, consolidation or similar transaction
(each referred to for the purposes of this definition as a “disposition”), of

          (a) any shares of Capital Stock of a Restricted Subsidiary (other than directors’
qualifying shares); or

          (b) any other Property of Arch Coal or any of its Restricted Subsidiaries outside of the
ordinary course of business of Arch Coal or such Restricted Subsidiary,

             other than, in the case of clause (a) or (b) above,

          (1) any disposition by a Restricted Subsidiary to Arch Coal or by Arch Coal or its
Restricted Subsidiary to a Restricted Subsidiary;

          (2) any disposition that constitutes a Permitted Investment or Restricted Payment
permitted by the covenant described under Section 4.08 of this Indenture;

          (3) any disposition effected in compliance with the first paragraph of the covenant
described under Section 5.01 of this Indenture; and

          (4) any disposition in a single transaction or a series of related transactions of
assets for aggregate consideration of less than $50.0 million;

3

 

          (5) a disposition of Cash Equivalents;

          (6) a disposition of accounts receivable in connection with the compromise,
settlement or collection thereof in the ordinary course of business or in bankruptcy or
similar proceedings;

          (7) a disposition of any property or equipment that has become damaged, worn out or
obsolete;

          (8) any disposition of accounts receivable and related assets or an interest therein
pursuant to a Receivables Facility;

          (9) the creation or perfection of a Lien not prohibited by the Indenture (but not
the sale or other disposition of any asset subject to such Lien);

          (10) the surrender or waiver of contract rights or the settlement, release or
surrender of contract, tort or other claims of any kind; and

          (11) the sale or other disposition (whether or not in the ordinary course of
business) of coal properties, provided at the time of such sale or other disposition such
properties do not have associated with them any proved reserves.

     “Attributable Debt” in respect of a Sale and Leaseback Transaction means, at any date of
determination,

          (a) if such Sale and Leaseback Transaction is a Capital Lease Obligation, the amount of
Debt represented thereby according to the definition of “Capital Lease Obligations;” and

          (b) in all other instances, the greater of:

               (1) the Fair Market Value of the Property subject to such Sale and Leaseback
Transaction; and

               (2) the present value (discounted at the interest rate borne by the Notes,
compounded annually) of the total obligations of the lessee for rental payments during
the remaining term of the lease included in such Sale and Leaseback Transaction
(including any period for which such lease has been extended).

     “Average Life” means, as of any date of determination, with respect to any Debt or Preferred
Stock, the quotient obtained by dividing:

               (a) the sum of the product of the numbers of years (rounded to the nearest one-twelfth of
one year) from the date of determination to the dates of each successive scheduled principal
payment of such Debt or redemption or similar payment with respect to such Preferred Stock
multiplied by the amount of such payment by

               (b) the sum of all such payments.

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          “Bankruptcy Law” means any law relating to bankruptcy, insolvency, receivership, winding-up,
liquidation, reorganization or relief of debtors or any amendment to, succession to or change in
any such law, including, without limitation, the bankruptcy law of Arch Coal’s jurisdiction and
title 11, United States Bankruptcy Code of 1978, as amended.

          “Board of Directors” means the board of directors of Arch Coal.

          “Business Day” means any day (other than a Saturday or Sunday) which is not a day on which
banking institutions in New York, New York are authorized or obligated by law to close for
business.

          “Capital Lease Obligations” means any obligation under a lease that is required to be
capitalized for financial reporting purposes in accordance with GAAP; and the amount of Debt
represented by such obligation shall be the capitalized amount of such obligations determined in
accordance with GAAP; and the Stated Maturity thereof shall be the date of the last payment of rent
or any other amount due under such lease prior to the first date upon which such lease may be
terminated by the lessee without payment of a penalty. For purposes of Section 4.07 of this
Indenture, a Capital Lease Obligation shall be deemed secured by a Lien on the Property being
leased.

          “Capital Stock” means, with respect to any Person, any shares or other equivalents (however
designated) of any class of corporate stock or partnership or limited liability company interests
or any other participations, rights, warrants, options or other interests in the nature of an
equity interest in such Person, including Preferred Stock, but excluding any debt security
convertible or exchangeable into such equity interest.

          “Capital Stock Sale Proceeds” means the aggregate proceeds, including cash and the Fair Market
Value of Property other than cash, received by Arch Coal from the issuance or sale (other than to a
Subsidiary of Arch Coal or an employee stock ownership plan or trust established by Arch Coal or
any such Subsidiary for the benefit of their employees) by Arch Coal of its Capital Stock (other
than Disqualified Stock) or from a contribution to its common equity capital, in each case after
the Issue Date, and net of attorneys’ fees, accountants’ fees, underwriters’ or placement agents’
fees, discounts or commissions and brokerage, consultant and other fees actually incurred in
connection with such issuance or sale or contribution, as the case may be, and net of taxes paid or
payable as a result thereof.

          “Cash Equivalents” means any of the following:

          (a) Investments in U.S. Government Obligations maturing within 365 days of the date of
acquisition thereof;

          (b) Investments in time deposit accounts, certificates of deposit and money market
deposits maturing within 90 days of the date of acquisition thereof issued by a bank or trust
company organized under the laws of the United States of America or any state thereof having
capital, surplus and undivided profits aggregating in excess of $500 million and whose
long-term debt is rated “A-3” or “A-” or higher according to Moody’s or S&P (or such similar
equivalent rating by at least one “nationally recognized statistical rating organization” (as
defined in Rule 436 under the Securities Act));

5

 

          (c) repurchase obligations with a term of not more than 30 days for underlying securities
of the types described in clause (a) entered into with:

               (1) a bank meeting the qualifications described in clause (b) above or

               (2) any primary government securities dealer reporting to the Market Reports
Division of the Federal Reserve Bank of New York;

          (d) Investments in commercial paper, maturing not more than 90 days after the date of
acquisition, issued by a corporation (other than an Affiliate of Arch Coal) organized and in
existence under the laws of the United States of America with a rating at the time as of which
any Investment therein is made of “P-1” (or higher) according to Moody’s or “A-1” (or higher)
according to S&P (or such similar equivalent rating by at least one “nationally recognized
statistical rating organization” (as defined in Rule 436 under the Securities Act));

          (e) direct obligations (or certificates representing an ownership interest in such
obligations) of any state of the United States of America (including any agency or
instrumentality thereof) for the payment of which the full faith and credit of such state is
pledged and which are not callable or redeemable at the issuer’s option; provided that:

               (1) the long-term debt of such state is rated “A-3” or “A-” or higher according to
Moody’s or S&P (or such similar equivalent rating by at least one “nationally recognized
statistical rating organization” (as defined in Rule 436 under the Securities Act)), and

               (2) such obligations mature within 180 days of the date of acquisition thereof; and

          (f) money market funds at least 95% of the assets of which constitute Cash Equivalents of
the kinds described in clauses (a) through (e) of this definition.

          “Change of Control” means the occurrence of any of the following events:

          (a) any “person” or “group” (as such terms are used in Sections 13(d) and 14(d) of the
Exchange Act or any successor provisions to either of the foregoing), including any group
acting for the purpose of acquiring, holding, voting or disposing of securities within the
meaning of Rule 13d-5(b)(1) under the Exchange Act, becomes the “beneficial owner” (as defined
in Rule 13d-3 under the Exchange Act, except that a person will be deemed to have “beneficial
ownership” of all shares that any such person has the right to acquire, whether such right is
exercisable immediately or only after the passage of time), directly or indirectly, of 50% or
more of the total voting power of the Voting Stock of Arch Coal (for purposes of this clause
(a), such person or group shall be deemed to beneficially own any Voting Stock of a
corporation held by any other corporation (the “parent corporation”) so long as such
person or group beneficially owns, directly or indirectly, in the aggregate at least a
majority of the total voting power of the Voting Stock of such parent corporation); or

6

 

          (b) the sale, transfer, assignment, lease, conveyance or other disposition, directly or
indirectly, of all or substantially all the Property of Arch Coal and its Restricted
Subsidiaries, considered as a whole (other than a disposition of such Property as an entirety
or virtually as an entirety to a Wholly Owned Restricted Subsidiary of Arch Coal), shall have
occurred; or

          (c) during any period of two consecutive years, individuals who at the beginning of such
period constituted the Board of Directors (together with any new directors whose election or
appointment by such Board or whose nomination for election by the shareholders of Arch Coal,
was approved by a vote of not less than three-fourths of the directors then still in office
who were either directors at the beginning of such period or whose election or nomination for
election was previously so approved) cease for any reason to constitute at least a majority of
the Board of Directors then in office; or

          (d) the adoption of any plan of liquidation or dissolution of Arch Coal.

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

          “Commission” means the U.S. Securities and Exchange Commission.

          “Commodity Price Protection Agreement” means, in respect of a Person, any forward contract,
commodity swap agreement, commodity option agreement or other similar agreement or arrangement.

          “Consolidated Current Liabilities” means, as of any date of determination, the aggregate
amount of liabilities of Arch Coal and its consolidated Restricted Subsidiaries which may properly
be classified as current liabilities (including taxes accrued as estimated), after eliminating:

          (a) all intercompany items between Arch Coal and any Restricted Subsidiary or between
Restricted Subsidiaries; and

          (b) all current maturities of long-term Debt.

     “Consolidated Interest Coverage Ratio” of a Person means, as of any date of determination, the
ratio of:

          (a) the aggregate amount of EBITDA of such Person for the most recent four consecutive
fiscal quarters for which internal financial statements are available to

          (b) Consolidated Interest Expense of such Person for such four fiscal quarters;

     provided, however, that:

               (1) if

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	 	(A)	 	since the beginning of such period such Person
or any Restricted Subsidiary of such Person has Incurred any Debt that
remains outstanding or Repaid any Debt or
	 
	 	(B)	 	the transaction giving rise to the need to
calculate the Consolidated Interest Coverage Ratio is an Incurrence or
Repayment of Debt,

Consolidated Interest Expense for such period shall be calculated after giving effect on a
pro forma basis to such Incurrence or Repayment as if such Debt was Incurred or Repaid on
the first day of such period, provided that, in the event of any such Repayment of Debt,
EBITDA for such period shall be calculated as if such Person or such Restricted Subsidiary
of such Person had not earned any interest income actually earned during such period in
respect of the funds used to Repay such Debt, and

               (2) if

	 	(A)	 	since the beginning of such period such Person
or any Restricted Subsidiary of such Person shall have made any Asset
Sale or an Investment (by merger or otherwise) in any Restricted
Subsidiary of such Person (or any Person which becomes a Restricted
Subsidiary of such Person) or an acquisition of Property which
constitutes all or substantially all of an operating unit of a
business;
	 
	 	(B)	 	the transaction giving rise to the need to
calculate the Consolidated Interest Coverage Ratio is such an Asset
Sale, Investment or acquisition; or
	 
	 	(C)	 	since the beginning of such period any other
Person (that subsequently became a Restricted Subsidiary of such Person
or was merged with or into such Person or any Restricted Subsidiary of
such Person since the beginning of such period) shall have made such an
Asset Sale, Investment or acquisition,

then EBITDA for such period shall be calculated after giving pro forma effect to such
Asset Sale, Investment or acquisition as if such Asset Sale, Investment or acquisition had
occurred on the first day of such period.

          If any Debt bears a floating rate of interest and is being given pro forma effect, the
interest expense on such Debt shall be calculated as if the base interest rate in effect for such
floating rate of interest on the date of determination had been the applicable base interest rate
for the entire period (taking into account any Interest Rate Agreement applicable to such Debt if
such Interest Rate Agreement has a remaining term in excess of 12 months). In the event the
Capital Stock of any Restricted Subsidiary of such Person is sold during the period, such Person
shall be deemed, for purposes of clause (1) above, to have Repaid during such period the Debt of
such Restricted Subsidiary to the extent such Person and its continuing Restricted Subsidiaries are
no longer liable for such Debt after such sale.

8

 

          “Consolidated Interest Expense” of a Person means, for any period, the total interest expense
of such Person and its consolidated Restricted Subsidiaries, plus, to the extent not included in
such total interest expense, and to the extent Incurred by such Person or its Restricted
Subsidiaries,

          (a) interest expense attributable to Capital Lease Obligations;

          (b) amortization of debt discount and debt issuance cost, including commitment fees;

          (c) capitalized interest;

          (d) non-cash interest expense;

          (e) commissions, discounts and other fees and charges owed with respect to letters of
credit and banker’s acceptance financing;

          (f) net costs associated with Interest Rate Agreements (including amortization of fees);

          (g) Disqualified Stock Dividends;

          (h) Preferred Stock Dividends;

          (i) interest Incurred in connection with Investments in discontinued operations;

          (j) interest accruing on any Debt of any other Person to the extent such Debt is
Guaranteed by such Person or any of its Restricted Subsidiaries; and

          (k) the cash contributions to any employee stock ownership plan or similar trust to the
extent such contributions are used by such plan or trust to pay interest or fees to any Person
(other than such Person) in connection with Debt Incurred by such plan or trust.

          “Consolidated Net Income” of a Person means, for any period, the net income (loss) of such
Person and its consolidated Restricted Subsidiaries; provided, however, that there shall not be
included in such Consolidated Net Income:

          (a) any net income (loss) of any other Person (other than such Person) if such other
Person is not a Restricted Subsidiary, except that:

               (1) subject to the exclusion contained in clause (c) below, equity of such Person
and its consolidated Restricted Subsidiaries in the net income of any such other Person
for such period shall be included in such Consolidated Net Income up to the aggregate
amount of cash distributed by such other Person during such period to such Person or its
Restricted Subsidiary as a dividend or other distribution (subject, in the case of a
dividend or other distribution to a Restricted Subsidiary, to the limitations contained
in clause (b) below); and

9

 

               (2) the equity of such Person and its consolidated Restricted Subsidiaries in a net
loss of any other Person for such period shall be included in determining such
Consolidated Net Income to the extent such Person or any Restricted Subsidiary of such
Person has actually contributed, lent or transferred cash to such other Person;

          (b) any net income (loss) of any Restricted Subsidiary if such Restricted Subsidiary is
subject to restrictions, directly or indirectly, on the payment of dividends or the making of
distributions, directly or indirectly, to such Person, except that:

               (1) subject to the exclusion contained in clause (c) below, the equity of such
Person and its consolidated Restricted Subsidiaries in the net income of any such
Restricted Subsidiary for such period shall be included in such Consolidated Net Income
up to the aggregate amount of cash that is or could be dividend or distributed or
otherwise paid (including through making loans and repaying Debt) by such Restricted
Subsidiary during such period to such Person or another Restricted Subsidiary as a
dividend or other distribution (subject, in the case of a dividend or other distribution
to another Restricted Subsidiary, to the limitation contained in this clause); and

               (2) the equity of such Person and its consolidated Restricted Subsidiaries in a net
loss of any such Restricted Subsidiary for such period shall be included in determining
such Consolidated Net Income;

          (c) any gain or loss realized upon the sale or other disposition of any Property of such
Person or any of its consolidated Subsidiaries (including pursuant to any Sale and Leaseback
Transaction) that is not sold or otherwise disposed of in the ordinary course of business;

          (d) any extraordinary gain or loss;

          (e) the cumulative effect of a change in accounting principles; and

          (f) any non-cash compensation expense realized for grants of performance shares, stock
options or other rights to officers, directors and employees of such Person or any Restricted
Subsidiary, provided that such shares, options or other rights can be redeemed at the option
of the holder only for Capital Stock of such Person (other than Disqualified Stock).

Notwithstanding the foregoing, for purposes of the covenant described under Section 4.08 of this
Indenture only, there shall be excluded from Consolidated Net Income any dividends, repayments of
loans or advances or other transfers of Property from Unrestricted Subsidiaries to such Person or a
Restricted Subsidiary to the extent such dividends, repayments or transfers increase the amount of
Restricted Payments permitted under such covenant pursuant to clause (c)(4) thereof.

     “Consolidated Net Tangible Assets” means, as of any date of determination, the sum of the
amounts that would appear on a consolidated balance sheet of Arch Coal and its consolidated
Restricted Subsidiaries, less any amounts attributable to non-Wholly Owned Restricted

10

 

Subsidiaries that are not consolidated with Arch Coal and plus the portion of the consolidated
net tangible assets of a non-Wholly Owned Restricted Subsidiary that is not consolidated with Arch
Coal equal to the percentage of its outstanding Capital Stock owned by Arch Coal and its Restricted
Subsidiaries, as of the end of the most recent fiscal quarter for which internal financial
statements are available as the total assets (determined on a pro forma basis to give effect to any
acquisition or disposition of assets made after such balance sheet date and on or prior to such
date of determination), and less accumulated depreciation and amortization, allowances for doubtful
receivables, other applicable reserves and other properly deductible items) of Arch Coal and its
Restricted Subsidiaries, after giving effect to purchase accounting and after deducting therefrom
Consolidated Current Liabilities and, to the extent otherwise included, the amounts of (without
duplication):

          (a) the excess of cost over fair market value of assets or businesses acquired;

          (b) any revaluation or other write-up in book value of assets subsequent to the last day
of the fiscal quarter of Arch Coal immediately preceding the Issue Date as a result of a
change in the method of valuation in accordance with GAAP; and

          (c) unamortized debt discount and expenses and other unamortized deferred charges,
goodwill, patents, trademarks, service marks, trade names, copyrights, licenses, organization
or developmental expenses and other intangible items.

          “Corporate Trust Office” means the office of the Trustee, at which at any particular time its
corporate trust business shall be principally administered, which office at the date of execution
of this Indenture is located at One U.S. Bank Plaza, Mail Code SL-MO-T6CT, St. Louis, Missouri
63101, Attention: Corporate Trust Department or such other address as the Trustee may designate
from time to time by notice to the Holders and Arch Coal, or the principal corporate trust office
of any successor Trustee (or such other address as such successor Trustee may designate from time
to time by notice to the Holders and to Arch Coal).

          “Credit Agreement” means that certain Revolving Credit Agreement, dated as of December 22,
2004, by and among Arch Coal, PNC Bank, National Association, as Administrative Agent and the other
lenders named therein providing for up to $800.0 million of revolving credit borrowings, including
any related notes, Guarantees, collateral documents, instruments and agreements executed in
connection therewith, and in each case as amended, restated, modified, renewed, refunded, replaced
or refinanced from time to time, regardless of whether such amendment, restatement, modification,
renewal, refunding, replacement or refinancing is with the same financial institutions or
otherwise.

          “Credit Facilities” means, one or more debt facilities (including, without limitation, the
Credit Agreement), commercial paper facilities or indentures, in each case with banks or other
institutional lenders or a trustee, providing for revolving credit loans, term loans, receivables
financing (including through the sale of receivables to such lenders or to special purpose entities
formed to borrow from such lenders against such receivables), letters of credit or issuances of
notes, in each case, as amended, restated, modified, renewed, refunded, replaced or refinanced in
whole or in part from time to time.

11

 

          “Currency Exchange Protection Agreement” means, in respect of a Person, any foreign exchange
contract, currency swap agreement, currency option or other similar agreement or arrangement.

          “Custodian” means any receiver, trustee, assignee, liquidator, custodian, administrator or
similar official under any Bankruptcy Law.

          “Debt” means, with respect to any Person on any date of determination (without duplication):

          (a) the principal of and premium (if any) in respect of:

               (1) debt of such Person for money borrowed, and

               (2) debt evidenced by notes, debentures, bonds or other similar instruments for the
payment of which such Person is responsible or liable;

          (b) all Capital Lease Obligations of such Person and all Attributable Debt in respect of
Sale and Leaseback Transactions entered into by such Person;

          (c) all obligations of such Person representing the deferred purchase price of Property,
all conditional sale obligations of such Person and all obligations of such Person under any
title retention agreement (but excluding in-kind obligations of such Person relating to net
coal balancing positions or bookouts and trade accounts payable, in either case arising in the
ordinary course of business);

          (d) all obligations of such Person for the reimbursement of any obligor on any letter of
credit, banker’s acceptance or similar credit transaction (other than obligations with respect
to letters of credit securing obligations (other than obligations described in (a) through (c)
above) entered into in the ordinary course of business of such Person to the extent such
letters of credit are not drawn upon or, if and to the extent drawn upon, such drawing is
reimbursed no later than the third business day following receipt by such Person of a demand
for reimbursement following payment on the letter of credit);

          (e) the amount of all obligations of such Person with respect to the Repayment of any
Disqualified Stock or, with respect to any Subsidiary of such Person, any Preferred Stock (but
excluding, in each case, any accrued dividends);

          (f) all obligations of the type referred to in clauses (a) through (e) above of other
Persons and all dividends of other Persons for the payment of which, in either case, such
Person is responsible or liable, directly or indirectly, as obligor, guarantor or otherwise,
including by means of any Guarantee;

          (g) all obligations of the type referred to in clauses (a) through (f) above of other
Persons secured by any Lien on any Property of such Person (whether or not such obligation is
assumed by such Person), the amount of such obligation being deemed to be the lesser of the
Fair Market Value of such Property and the amount of the obligation so secured; and

12

 

          (h) to the extent not otherwise included in this definition, Hedging Obligations of such
Person.

The amount of Debt of any Person at any date shall be the outstanding balance, or the accreted
value of such Debt in the case of Debt issued with original issue discount, at such date of all
unconditional obligations as described above and the maximum liability, upon the occurrence of the
contingency giving rise to the obligation, of any contingent obligations at such date. The amount
of Debt represented by a Hedging Obligation shall be equal to:

               (1) zero if such Hedging Obligation has been Incurred pursuant to clause (f), (g) or
(h) of the second paragraph of the covenant described under Section 4.06 of this
Indenture; or

               (2) the notional amount of such Hedging Obligation if not Incurred pursuant to such
clauses.

     “Default” means any event which is, or after notice or passage of time or both would be, an
Event of Default.

     “Depositary” means DTC until a successor Depositary, if any, shall have become such pursuant
to this Indenture, and thereafter Depositary shall mean or include each Person who is then a
Depositary hereunder.

     “Disqualified Stock” means any Capital Stock of a Person or any of its Restricted Subsidiaries
that by its terms (or by the terms of any security into which it is convertible or for which it is
exchangeable, in either case at the option of the holder thereof) or otherwise:

          (a) matures or is mandatorily redeemable pursuant to a sinking fund obligation or
otherwise;

          (b) is or may become redeemable or repurchaseable at the option of the holder thereof, in
whole or in part; or

          (c) is convertible or exchangeable at the option of the holder thereof for Debt or
Disqualified Stock,

on or prior to, in the case of clause (a), (b) or (c), the first anniversary of the Stated Maturity
of the Notes. Notwithstanding the preceding sentence, any Capital Stock that would constitute
Disqualified Stock solely because the holders thereof have the right to require Arch Coal to
repurchase such Capital Stock upon the occurrence of a change of control or an asset sale will not
constitute Disqualified Stock if (i) the “asset sale” or “change of control” provisions applicable
to such Capital Stock are no more favorable to the holders of such Capital Stock than the
provisions contained in the covenant described in Section 4.09 of this Indenture and the covenant
described in Section 4.11 of this Indenture and (ii) such Capital Stock specifically provides that
such Person will not repurchase or redeem any such stock pursuant to such provision prior to Arch
Coal’s repurchase of such Notes as are required to be repurchased pursuant to the covenant
described in Section 4.09 of this Indenture and the covenant described in Section 4.11 of this
Indenture.

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          “Disqualified Stock Dividends” of a Person means all dividends (other than dividends paid in
Capital Stock (except Disqualified Stock) of Arch Coal) with respect to Disqualified Stock of such
Person held by Persons other than a Wholly Owned Restricted Subsidiary of such Person. The amount
of any such dividend shall be equal to the quotient of such dividend divided by the difference
between one and the maximum statutory federal income tax rate (expressed as a decimal number
between 1 and 0) then applicable to such Person.

          “Domestic Subsidiary” means any Restricted Subsidiary of Arch Coal other than a Foreign
Subsidiary.

          “DTC” means The Depository Trust Company.

          “EBITDA” of a Person means, for any period, an amount equal to, for such Person and its
consolidated Restricted Subsidiaries:

          (a) the sum of Consolidated Net Income for such period, plus the following to the extent
reducing Consolidated Net Income for such period:

               (1) the provision for taxes based on income or profits or utilized in computing net
loss;

               (2) Consolidated Interest Expense;

               (3) depreciation and depletion;

               (4) amortization of intangibles;

               (5) any other non-cash items (other than any such non-cash item to the extent that
it represents an accrual of, or reserve for, cash expenditures in any future period);

               (6) accruals of Postretirement Medical Liabilities, as defined by GAAP, net of cash
payments for such Postretirement Medical Liabilities;

               (7) accretion of asset retirement obligations in accordance with SFAS No. 143,
Accounting for Asset Retirement Obligations, and any similar accounting in prior periods,
net of cash payments for such asset retirement obligations;

               (8) the amount of any unusual or non-recurring losses or charges (or minus any
unusual or non-recurring gains), including without limitation, restructuring charges such
as retention, severance, systems establishment costs or excess pension, OPEB, black lung
settlement, curtailment or other excess charges and fees, expenses or charges related to
any offering of Capital Stock or Debt of such Person permitted to be Incurred;

               (9) any net loss (or minus any net gain) attributable to the early extinguishment of
Debt, including, without limitation, any premiums or similar charges related to any Debt
Refinancing; and

14

 

               (10) to the extent not included in (1) through (9) above, the portion of any of the
items described in (1) through (9) above of a non-Wholly Owned Restricted Subsidiary that
is not consolidated with such Person equal to the percentage of the outstanding common
Capital Stock of the non-Wholly Owned Restricted Subsidiary owned by such Person and its
Restricted Subsidiaries, minus

          (b) all non-cash items increasing Consolidated Net Income for such period (other than any
such non-cash item to the extent that it will result in the receipt of cash payments in any
future period).

Notwithstanding the foregoing clause (a), the provision for taxes and the depreciation,
amortization and non-cash items of a Restricted Subsidiary shall be added to Consolidated Net
Income to compute EBITDA only to the extent (and in the same proportion) that the net income of
such Restricted Subsidiary was included in calculating Consolidated Net Income and only if a
corresponding amount would be permitted at the date of determination to be dividended or
distributed or otherwise paid (including through making loans and repaying debt) to such Person by
such Restricted Subsidiary without prior approval (that has not been obtained), pursuant to the
terms of its charter and all agreements, instruments, judgments, decrees, orders, statutes, rules
and governmental regulations applicable to such Restricted Subsidiary or its shareholders or
members.

          “Event of Default” has the meaning set forth under Section 6.01 of this Indenture.

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

          “Exchange Notes” means the notes issued in exchange for the Notes issued in this offering or
any Additional Notes pursuant to the Registration Rights Agreement or any similar registration
rights agreement with respect to any Additional Notes.

          “Exchange Offer” means the exchange offer by Arch Coal and the Guarantors of the Exchange
Notes for original Notes to be effected pursuant to the Registration Rights Agreement or any
similar registration rights agreement with respect to any Additional Notes.

          “Exchange Offer Registration Statement” means the Exchange Offer Registration Statement as
defined in the Registration Rights Agreement.

          “Fair Market Value” means, with respect to any Property, the price that could be negotiated in
an arm’s-length free market transaction, for cash, between a willing seller and a willing buyer,
neither of whom is under undue pressure or compulsion to complete the transaction. Fair Market
Value shall be determined, except as otherwise provided,

          (a) if such Property has a Fair Market Value equal to or less than $5.0 million, by any
Officer; or

          (b) if such Property has a Fair Market Value in excess of $5.0 million, by at least a
majority of the disinterested members of the Board of Directors and evidenced by a Board
Resolution, dated within 30 days of the relevant transaction, delivered to the Trustee.

15

 

          “Foreign Subsidiary” means any Subsidiary of Arch Coal that is not organized under the laws of
the United States of America or any state thereof or the District of Columbia.

          “GAAP” means United States generally accepted accounting principles as in effect on the Issue
Date, including those set forth in:

          (a) the opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and the Public Company Accounting Oversight Board;

          (b) the statements and pronouncements of the Financial Accounting Standards Board;

          (c) such other statements by such other entity as approved by a significant segment of
the accounting profession; and

          (d) the rules and regulations of the Commission governing the inclusion of financial
statements (including pro forma financial statements) in periodic reports required to be filed
pursuant to Section 13 of the Exchange Act, including opinions and pronouncements in staff
accounting bulletins and similar written statements from the accounting staff of the
Commission.

provided that GAAP shall not give effect to FASB No. APB 14-1

     “Guarantee” means any obligation, contingent or otherwise, of any Person directly or
indirectly guaranteeing any Debt of any other Person and 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
Debt of such other Person (whether arising by virtue of partnership arrangements, or by
agreements to keep-well, to purchase assets, goods, securities or services, to take-or-pay or
to maintain financial statement conditions or otherwise); or

          (b) entered into for the purpose of assuring in any other manner the obligee against loss
in respect thereof (in whole or in part);

provided, however, that the term “Guarantee” shall not include:

               (1) endorsements for collection or deposit in the ordinary course of business; or

               (2) a contractual commitment by one Person to invest in another Person for so long
as such Investment is reasonably expected to constitute a Permitted Investment under
clause (a), (b) or (c) of the definition of “Permitted Investment.”

The term “Guarantee” used as a verb has a corresponding meaning.

16

 

     “Guarantor” means any Subsidiary of Arch Coal that has issued a Guarantee in favor of the
Notes.

          “Hedging Obligation” of any Person means any obligation of such Person pursuant to any
Interest Rate Agreement, Currency Exchange Protection Agreement, Commodity Price Protection
Agreement or any other similar agreement or arrangement.

          “Holder” means a Person in whose name a Note is registered in the Security Register.

          “Incur” means, with respect to any Debt or other obligation of any Person, to create, issue,
incur (by merger, conversion, exchange or otherwise), extend, assume, Guarantee or become liable in
respect of such Debt or other obligation or the recording, as required pursuant to GAAP or
otherwise, of any such Debt or obligation on the balance sheet of such Person (and “Incurrence” and
“Incurred” shall have meanings correlative to the foregoing); provided, however, that any Debt or
other obligations of a Person existing at the time such Person becomes a Subsidiary (whether by
merger, consolidation, acquisition or otherwise) shall be deemed to be Incurred by such Subsidiary
at the time it becomes a Subsidiary; and provided further, however, that solely for purposes of
determining compliance with Section 4.06 of this Indenture, amortization of debt discount shall not
be deemed to be the Incurrence of Debt, provided that in the case of Debt sold at a discount, the
amount of such Debt Incurred shall at all times be the aggregate principal amount at Stated
Maturity.

          “Indenture” means this instrument as originally executed or as it may from time to time be
supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the
applicable provisions hereof, including, for all purposes of this instrument and any such
supplemental indenture following the effectiveness of a registration statement under the Securities
Act covering the Notes, the provisions of the TIA that are deemed to be a part of and govern this
instrument, and any such supplemental indenture, respectively.

          “Indenture Obligations” means the obligations of Arch Coal and any other obligor under this
Indenture or under the Notes, including any Guarantor, to pay principal of, premium, if any, and
interest when due and payable, and all other amounts due or to become due under or in connection
with this Indenture, the Notes and the performance of all other obligations to the Trustee and the
Holders under this Indenture and the Notes, according to the respective terms thereof.

          “Independent Financial Advisor” means an accounting, appraisal, engineering or banking firm of
national standing, provided that such firm or appraiser is not an Affiliate of Arch Coal.

          “Initial Purchasers” means Banc of America Securities LLC, Citigroup Global Markets Inc.,
Morgan Stanley & Co. Incorporated, J.P. Morgan Securities Inc., PNC Capital Markets LLC, BMO
Capital Markets Corp., BNY Mellon Capital Markets, LLC, Calyon Securities (USA) Inc., Credit Suisse
Securities (USA) LLC, Mizuho Securities USA Inc., Morgan Keegan & Company, Inc., Natixis
Bleichroeder Inc., RBS Securities Inc., Santander Investment Securities Inc., U.S. Bancorp
Investments, Inc., and Wedbush Morgan Securities Inc.

          “Interest Payment Date” means February 1 and August 1 of each year to Stated Maturity.

17

 

          “Interest Rate Agreement” means, for any Person, any interest rate swap agreement, interest
rate cap agreement, interest rate collar agreement or other similar agreement.

          “Investment” by any Person means any direct or indirect loan, advance or other extension of
credit or capital contribution (by means of transfers of cash or other Property to others or
payments for Property or services for the account or use of others, or otherwise) to, or Incurrence
of a Guarantee of any obligation of, or purchase or acquisition of Capital Stock, bonds, notes,
debentures or other securities or evidence of Debt issued by, any other Person. For purposes of
the covenants described under Section 4.08 and 4.15 of this Indenture and the definition of
“Restricted Payment,” the term “Investment” shall include the portion (proportionate to Arch
Coal’s or a Restricted Subsidiary’s equity interest in such Subsidiary) of the Fair Market Value of
the net assets of any Subsidiary of Arch Coal at the time that such Subsidiary is designated an
Unrestricted Subsidiary; provided, however, that upon a redesignation of such Subsidiary as a
Restricted Subsidiary, Arch Coal shall be deemed to continue to have a permanent “Investment” in an
Unrestricted Subsidiary of an amount (if positive) equal to:

          (a) Arch Coal’s “Investment” in such Subsidiary at the time of such redesignation, less

          (b) the portion (proportionate to Arch Coal’s or a Restricted Subsidiary’s equity
interest in such Subsidiary) of the Fair Market Value of the net assets of such Subsidiary at
the time of such redesignation.

In determining the amount of any Investment made by transfer of any Property other than cash, such
Property shall be valued at its Fair Market Value at the time of such Investment.

          “Investment Grade Rating” means a rating equal to or higher than Baa3 (or the equivalent) by
Moody’s and BBB- (or the equivalent) by S&P.

          “Issue Date” means the date on which the Notes are initially issued.

          “Issuer Order” means a written order signed in the name of Arch Coal by any Person authorized
by a resolution of the directors, Officers or shareholders of Arch Coal or such other similar
governing body or Person of Arch Coal.

          “Lien” means, with respect to any Property of any Person, any mortgage or deed of trust,
pledge, hypothecation, assignment, deposit arrangement, security interest, lien, charge, easement
(other than any easement not materially impairing usefulness or marketability), encumbrance,
preference, priority or other security agreement or preferential arrangement of any kind or nature
whatsoever on or with respect to such Property (including any Capital Lease Obligation, conditional
sale or other title retention agreement having substantially the same economic effect as any of the
foregoing or any Sale and Leaseback Transaction).

          “LLC Agreement” means the Limited Liability Company Agreement of Arch Western Resources, LLC,
dated as of June 1, 1998 between Arch Western Acquisition Corporation and Delta Housing, Inc.

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          “Maturity” means, with respect to any indebtedness, the date on which any principal of such
indebtedness becomes due and payable as therein or herein provided, whether at the Stated Maturity
with respect to such principal or by declaration of acceleration, call for redemption or purchase
or otherwise.

          “Moody’s” means Moody’s Investors Service, Inc. or any successor to the rating agency business
thereof.

          “Net Available Cash” from any Asset Sale means cash payments received therefrom (including any
cash payments received by way of deferred payment of principal pursuant to a note or installment
receivable or otherwise, but only as and when received, but excluding any other consideration
received in the form of assumption by the acquiring Person of Debt or other obligations relating to
the Property that is the subject of such Asset Sale or received in any other non-cash form), in
each case net of:

          (a) all legal, title and recording tax expenses, commissions and other fees and expenses
incurred, and all Federal, state, provincial, foreign and local taxes required to be accrued
as a liability under GAAP, as a consequence of such Asset Sale;

          (b) all payments made on or in respect of any Debt that is secured by any Property
subject to such Asset Sale, in accordance with the terms of any Lien upon such Property, or
which must by its terms, or in order to obtain a necessary consent to such Asset Sale, or by
applicable law, be repaid out of the proceeds from such Asset Sale;

          (c) all distributions and other payments required to be made to minority interest Holders
in Subsidiaries or joint ventures as a result of such Asset Sale; and

          (d) the deduction of appropriate amounts provided by the seller as a reserve, in
accordance with GAAP, against any liabilities associated with the Property disposed of in such
Asset Sale and retained by Arch Coal or any Restricted Subsidiary after such Asset Sale.

          “Note Guarantees” means a Guarantee by a Guarantor of all of Arch Coal’s obligations with
respect to the Notes.

          “Officer” means the Chief Executive Officer, the President, the Chief Financial Officer or any
Senior Vice President of Arch Coal.

          “Officers’ Certificate” means a certificate signed by two Officers, at least one of whom shall
be the principal executive officer or principal financial officer, and delivered to the Trustee.

          “Opinion of Counsel” means a written opinion from legal counsel who is acceptable to the
Trustee. The counsel may be an employee of or counsel to Arch Coal or the Trustee.

          “Permitted Business” means the business conducted by Arch Coal on the Issue Date, any business
that is related, ancillary or complementary to the businesses of Arch Coal and its Restricted
Subsidiaries on the Issue Date and any business of a nature that is or shall have become (i)
related to the extraction, processing, storage, distribution or use of fuels or minerals,

19

 

including, without limitation, coal gasification, coal liquefaction, natural gas, liquefied
natural gas, coalbed or coal mine methane gas and bitumen from tar sands, as well as the production
electricity or other sources of power, such as coal- or natural gas-fueled power generation
facilities, wind, solar or hydroelectric power generation facilities or similar activities or (ii)
customary in the coal production industry.

          “Permitted Investment” means any Investment by Arch Coal or any Restricted Subsidiary in:

          (a) Arch Coal or any Restricted Subsidiary;

          (b) any Person that will, upon the making of such Investment, become a Restricted
Subsidiary;

          (c) any Person if as a result of such Investment such Person is merged or consolidated
with or into, or transfers or conveys all or substantially all its Property to, Arch Coal or
its Restricted Subsidiary, provided that such Person’s primary business is a Permitted
Business;

          (d) Cash Equivalents;

          (e) receivables owing to Arch Coal or its Restricted Subsidiary, if created or acquired
in the ordinary course of business and payable or dischargeable in accordance with customary
trade terms; provided, however, that such trade terms may include such concessionary trade
terms as Arch Coal or such Restricted Subsidiary deems reasonable under the circumstances;

          (f) payroll, travel and similar advances to cover matters that are expected at the time
of such advances ultimately to be treated as expenses for accounting purposes and that are
made in the ordinary course of business;

          (g) loans and advances to employees made in the ordinary course of business permitted by
law of Arch Coal or such Restricted Subsidiary, as the case may be; provided that such loans
and advances do not exceed $5.0 million in the aggregate at any one time outstanding;

          (h) stock, obligations or other securities received in settlement of debts created in the
ordinary course of business and owing to Arch Coal or a Restricted Subsidiary or in
satisfaction of judgments;

          (i) any Person to the extent such Investment represents the non-cash portion of the
consideration received in connection with an Asset Sale consummated in compliance with the
covenant described under Section 4.09 of this Indenture, or any non-cash consideration
received in connection with a disposition of Property excluded from the definition of Asset
Sale;

          (j) Investments in an aggregate amount, together with all other Investments made pursuant
to this clause (j), not to exceed 5.0% of Consolidated Net Tangible Assets (with

20

 

the Fair Market Value being measured at the time made and without giving effect to
subsequent changes in value);

          (k) other Investments made for Fair Market Value that do not exceed $100.0 million in the
aggregate outstanding at any one time (with the Fair Market Value being measured at the time
made and without giving effect to subsequent changes in value);

          (l) Hedging Obligations that constitute Permitted Debt;

          (m) Investments in connection with a Receivables Facility and

          (n) Investments in Permitted Joint Ventures in an aggregate amount, together with all
other Investments made pursuant to this clause (n), not to exceed 5.0% of Consolidated Net
Tangible Assets (with the Fair Market Value being measured at the time and without giving
effect to subsequent changes in value).

          “Permitted Joint Ventures” means any agreement, contract or other arrangement between Arch
Coal or any Restricted Subsidiary and any Person engaged principally in a Permitted Business that
permits one party to share risks or costs, comply with regulatory requirements or satisfy other
business objectives customarily achieved through the conduct of such Permitted Business jointly
with third parties.

          “Permitted Liens” means:

          (a) Liens to secure Debt under Credit Facilities (including Guarantees thereof) in an
aggregate amount at any one time outstanding not to exceed the amount of Debt permitted to be
Incurred under clause (a) of the second paragraph of the covenant described in Section 4.06 of
this Indenture;

          (b) Liens to secure Debt permitted to be Incurred under clause (d) of the second
paragraph of the covenant described in Section 4.06 of this Indenture and other purchase money
Liens to finance Property of Arch Coal or any of its Restricted Subsidiaries; provided that
any such Lien may not extend to any Property of Arch Coal or any Restricted Subsidiary, other
than the Property acquired, constructed or leased and any improvements or accessions to such
Property (including, in the case of the acquisition of Capital Stock of a Person that becomes
a Restricted Subsidiary, Liens on the Property of the Person whose Capital Stock was
acquired);

          (c) Liens for taxes, assessments or governmental charges or levies on the Property of
Arch Coal or any Restricted Subsidiary if the same shall not at the time be delinquent or
thereafter can be paid without penalty, or are being contested in good faith and by
appropriate proceedings promptly instituted and diligently concluded, provided that any
reserve or other appropriate provision that shall be required in conformity with GAAP shall
have been made therefor;

          (d) Liens imposed by law, such as carriers’, warehousemen’s and mechanics’ Liens and
other similar Liens, on the Property of Arch Coal or any Restricted Subsidiary arising

21

 

in the ordinary course of business and securing payment of obligations that are not more
than 60 days past due or are being contested in good faith and by appropriate proceedings;

          (e) Liens on the Property of Arch Coal or any Restricted Subsidiary Incurred in the
ordinary course of business to secure performance of obligations with respect to statutory or
regulatory requirements, performance or return-of-money bonds, surety bonds or other
obligations of a like nature and Incurred in a manner consistent with industry practice, in
each case which are not Incurred in connection with the borrowing of money, the obtaining of
advances or credit or the payment of the deferred purchase price of Property and which do not
in the aggregate impair in any material respect the use of Property in the operation of the
business of Arch Coal and the Restricted Subsidiaries taken as a whole;

          (f) Liens on Property at the time Arch Coal or any Restricted Subsidiary acquired such
Property, including any acquisition by means of a merger or consolidation with or into Arch
Coal or any Restricted Subsidiary; provided, however, that any such Lien may not extend to any
other Property of Arch Coal or any Restricted Subsidiary; provided further, however, that such
Liens shall not have been Incurred in anticipation of or in connection with the transaction or
series of transactions pursuant to which such Property was acquired by Arch Coal or any
Restricted Subsidiary;

          (g) Liens on the Property of a Person at the time such Person becomes a Restricted
Subsidiary; provided, however, that any such Lien may not extend to any other Property of Arch
Coal or any other Restricted Subsidiary that is not a direct Subsidiary of such Person;
provided further, however, that any such Lien was not Incurred in anticipation of or in
connection with the transaction or series of transactions pursuant to which such Person became
a Restricted Subsidiary;

          (h) pledges or deposits by Arch Coal or any Restricted Subsidiary under workers’
compensation laws, unemployment insurance laws or similar legislation, or good faith deposits
in connection with bids, tenders, contracts (other than for the payment of Debt) or leases to
which Arch Coal or any Restricted Subsidiary is party, or deposits to secure public or
statutory obligations of Arch Coal, or deposits for the payment of rent, in each case Incurred
in the ordinary course of business;

          (i) utility easements, building restrictions and such other encumbrances or charges
against real Property as are of a nature generally existing with respect to properties of a
similar character;

          (j) Liens existing on the Issue Date not otherwise described in clauses (a) through (i)
above or (k) through (t) below;

          (k) Liens on the Property of Arch Coal or any Restricted Subsidiary to secure any
Refinancing, in whole or in part, of any Debt secured by Liens referred to in clause (b), (f),
(g) or (j) above; provided, however, that any such Lien shall be limited to all or part of the
same Property that secured the original Lien (together with improvements and accessions to
such Property), and the aggregate principal amount of Debt that is secured by such Lien shall
not be increased to an amount greater than the sum of:

22

 

               (1) the outstanding principal amount, or, if greater, the committed amount, of the
Debt secured by Liens described under clause (b), (f), (g) or (j) above, as the case may
be, at the time the original Lien became a Permitted Lien under the Indenture, and

               (2) an amount necessary to pay any fees and expenses, including premiums and
defeasance costs, incurred by Arch Coal or such Restricted Subsidiary in connection with
such Refinancing;

               (l) Liens on the Arch Coal Notes to secure the Arch Western Notes and any Permitted
Refinancing Debt Incurred in respect thereof;

               (m) Liens on Property used to defease or to satisfy and discharge Debt; provided that (a)
the Incurrence of such Debt was not prohibited by the Indenture and (b) such defeasance or
satisfaction and discharge is not prohibited by the Indenture;

               (n) Liens in favor of Arch Coal or any Restricted Subsidiary;

               (o) judgment Liens not giving rise to an Event of Default, that are being contested in
good faith by appropriate legal proceedings and for which adequate reserves have been made;

               (p) Liens on accounts receivable and related assets in connection with a Receivables
Facility;

               (q) rights of banks to set off deposits against debts owed to said bank;

               (r) contract mining agreements and leases or subleases granted to others that do not
materially interfere with the ordinary conduct of business of Arch Coal or any of its
Restricted Subsidiaries;

               (s) Liens on Capital Stock of an Unrestricted Subsidiary that secure Debt or other
obligations of such Unrestricted Subsidiary; and

               (t) Liens not otherwise permitted by clauses (a) through (s) above encumbering Property
having an aggregate Fair Market Value not in excess of 10.0% of Consolidated Net Tangible
Assets.

          “Permitted Refinancing Debt” means any Debt that Refinances any other Debt, including any
successive Refinancings, so long as:

               (a) such Debt is in an aggregate principal amount (or if Incurred with original issue
discount, an aggregate issue price) not in excess of the sum of:

               (1) the aggregate principal amount (or if Incurred with original issue discount, the
aggregate accreted value) then outstanding of the Debt being Refinanced; and

               (2) an amount necessary to pay any fees and expenses, including premiums and
defeasance costs, related to such Refinancing;

23

 

          (b) the Average Life of such Debt is equal to or greater than the Average Life of the
Debt being Refinanced; and

          (c) the new Debt shall not be senior in right of payment to the Debt that is being
Refinanced;

provided, however, that Permitted Refinancing Debt shall not include:

          (x) Debt of a Subsidiary of Arch Coal that is not a Guarantor that Refinances
Debt of Arch Coal or a Guarantor, or

          (y) Debt of Arch Coal or a Restricted Subsidiary that Refinances Debt of an
Unrestricted Subsidiary.

          “Person” means any individual, corporation, company (including any limited liability company),
association, partnership, joint venture, trust, unincorporated organization, government or any
agency or political subdivision thereof or any other entity.

          “Preferred Stock” means any Capital Stock of a Person, however designated, which entitles the
holder thereof to a preference with respect to the payment of dividends, or as to the distribution
of assets upon any voluntary or involuntary liquidation or dissolution of such Person, over shares
of any other class of Capital Stock issued by such Person.

          “Preferred Stock Dividends” of a Person means all dividends with respect to Preferred Stock of
Restricted Subsidiaries of such Person (other than dividends paid in Capital Stock (except
Disqualified Stock) of Arch Coal) held by Persons other than such Person or a Wholly Owned
Restricted Subsidiary of such Person. The amount of any such dividend shall be equal to the
quotient of such dividend divided by the difference between one and the maximum statutory federal
income rate (expressed as a decimal number between 1 and 0) then applicable to the issuer of such
Preferred Stock.

          “pro forma” means, with respect to any calculation made or required to be made pursuant to the
terms hereof, a calculation performed in accordance with Article 11 of Regulation S-X promulgated
under the Securities Act, as interpreted in good faith by the Board of Directors after consultation
with the independent certified public accountants of Arch Coal, or otherwise a calculation made in
good faith by the Board of Directors after consultation with the independent certified public
accountants of Arch Coal, as the case may be.

          “Property” means, with respect to any Person, any interest of such Person in any kind of
property or asset, whether real, personal or mixed, or tangible or intangible, including Capital
Stock in, and other securities of, any other Person. For purposes of any calculation required
pursuant to this Indenture, the value of any Property shall be its Fair Market Value.

          “Public Equity Offering” means an underwritten public offering of common Capital Stock (other
than Disqualified Stock) of Arch Coal pursuant to an effective registration statement under the
Securities Act.

          “Purchase Money Debt” means Debt:

24

 

          (a) consisting of the deferred purchase price of Property, conditional sale obligations,
obligations under any title retention agreement, other purchase money obligations and
obligations in respect of industrial revenue bonds, in each case where the maturity of such
Debt does not exceed the anticipated useful life of the Property being financed; and

          (b) Incurred to finance the acquisition, construction or lease by Arch Coal or a
Restricted Subsidiary of such Property, including additions and improvements thereto;

provided, however, that such Debt is Incurred within 180 days after the acquisition, construction
or lease of such Property by Arch Coal or such Restricted Subsidiary.

          “QIB” means a “Qualified Institutional Buyer” as defined under Rule 144A.

          “Rating Agencies” means Moody’s and S&P.

          “Receivables Facility” means one or more receivables financing facilities or arrangements, as
amended or modified from time to time, pursuant to which Arch Coal or any Subsidiary sells
(including a sale in exchange for a promissory note or Capital Stock of a Receivables Subsidiary)
its accounts receivable to a Receivables Subsidiary or a Receivables Subsidiary sells accounts
receivables to any other Person; provided such transaction is on market terms at the time Arch Coal
or such Subsidiary enters into such transaction.

          “Receivables Subsidiary” means a Subsidiary of Arch Coal which engages in no activities other
than those reasonably related to or in connection with the entering into of receivables
securitization transactions and which is designated by the Board of Directors (as provided below)
as a Receivables Subsidiary and

     (1) no portion of the Debt or any other obligations (contingent or otherwise) of
which:

	 	(A)	 	is guaranteed by Arch Coal or any Restricted
Subsidiary (excluding Guarantees (other than the principal of, and
interest on, Debt) pursuant to Standard Securitization Undertakings);
	 
	 	(B)	 	is recourse to or obligates Arch Coal or any
Restricted Subsidiary in any way other than pursuant to Standard
Securitization Undertakings; or
	 
	 	(C)	 	subjects any Property of Arch Coal or any
Restricted Subsidiary, directly or indirectly, contingently or
otherwise, to the satisfaction thereof, other than pursuant to Standard
Securitization Undertakings;

     (2) with which neither Arch Coal nor any Restricted Subsidiary has any material
contract, agreement, arrangement or understanding other than on terms no less favorable
to Arch Coal or such Restricted Subsidiary than those that might be obtained at the time
from Persons that are not Affiliates of Arch Coal, other than fees

25

 

payable in the ordinary course of business in connection with servicing accounts
receivable of such entity; and

     (3) to which neither Arch Coal nor any Restricted Subsidiary has any obligation to
maintain or preserve such entity’s financial condition or cause such entity to achieve
certain levels of operating results other than pursuant to Standard Securitization
Undertakings.

Any designation of a Subsidiary as a Receivable Subsidiary shall be evidenced to the Trustee by
filing with the Trustee a certified copy of the resolution of the Board of Directors giving effect
to the designation and an Officers’ Certificate certifying that the designation complied with the
preceding conditions and was permitted by this Indenture.

          “Record Date” for the interest payable on any Interest Payment Date means January 15 or July
15 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date.

          “Redemption Date,” when used with respect to any Note to be redeemed, in whole or in part,
means the date fixed for such redemption by or pursuant to this Indenture.

          “Redemption Price,” when used with respect to any Note to be redeemed, means the price at
which it is to be redeemed pursuant to this Indenture.

          “Refinance” means, in respect of any Debt, to refinance, extend, renew, refund or Repay, or to
issue other Debt, in exchange or replacement for, such Debt. “Refinanced” and “Refinancing” shall
have correlative meanings.

          “Registration Rights Agreement” means the Registration Rights Agreement relating to the Notes
dated July 31, 2009, among Arch Coal, the Guarantors and the Initial Purchasers.

          “Regulation S” means Regulation S under the Securities Act (including any successor regulation
thereto), as it may be amended from time to time.

          “Repay” means, in respect of any Debt, to repay, prepay, repurchase, redeem, legally defease
or otherwise retire such Debt. “Repayment” and “Repaid” shall have correlative meanings. For
purposes of the covenant described under Section 4.09 of this Indenture and the definition of
“Consolidated Interest Coverage Ratio,” Debt shall be considered to have been Repaid only to the
extent the related loan commitment, if any, shall have been permanently reduced in connection
therewith.

          “Restricted Payment” means:

          (a) any dividend or distribution (whether made in cash, securities or other Property)
declared or paid, on or with respect to any shares of Capital Stock of Arch Coal or any
Restricted Subsidiary (including any payment in connection with any merger or consolidation
with or into Arch Coal or any Restricted Subsidiary), except for any dividend or distribution
that is made solely to Arch Coal or a Restricted Subsidiary (and, if such Restricted
Subsidiary is not a Wholly Owned Restricted Subsidiary, to the other

26

 

shareholders or members of such Restricted Subsidiary on a pro rata basis or on a basis
that results in the receipt by Arch Coal or a Restricted Subsidiary of dividends or
distributions equal to or greater value than it would receive on a pro rata basis) or any
dividend or distribution payable solely in shares of Capital Stock (other than Disqualified
Stock) of Arch Coal;

          (b) the purchase, repurchase, redemption, acquisition or retirement for value of any
Capital Stock of Arch Coal (other than from Arch Coal or a Restricted Subsidiary);

          (c) the purchase, repurchase, redemption, acquisition or retirement for value, prior to
the date for any scheduled maturity, sinking fund or amortization or other installment
payment, of any Subordinated Obligation (other than (i) Debt permitted under clause (g) of the
second paragraph of the covenant described in Section 4.06 of this Indenture or (ii) the
purchase, repurchase or other acquisition of any Subordinated Obligation purchased in
anticipation of satisfying a scheduled maturity, sinking fund or amortization or other
installment obligation, in each case due within one year of the date of acquisition);

          (d) any Investment (other than Permitted Investments) in any Person; or

          (e) the issuance, sale or other disposition of Capital Stock of any Restricted Subsidiary
to a Person other than Arch Coal or another Restricted Subsidiary if the result thereof is
that such Restricted Subsidiary shall cease to be a Restricted Subsidiary, in which event the
amount of such “Restricted Payment” shall be the Fair Market Value of the remaining interest,
if any, in such former Restricted Subsidiary held by Arch Coal and the other Restricted
Subsidiaries.

          “Restricted Subsidiary” means any Subsidiary of Arch Coal other than an Unrestricted
Subsidiary.

          “Rule 144” means Rule 144 under the Securities Act (including any successor regulation
thereto), as it may be amended from time to time.

          “Rule 144A” means Rule 144A under the Securities Act (including any successor regulation
thereto), as it may be amended from time to time.

          “S&P” means Standard & Poor’s Ratings Services or any successor to the rating agency business
thereof.

          “Sale and Leaseback Transaction” means any direct or indirect arrangement relating to Property
now owned or hereafter acquired whereby Arch Coal or a Restricted Subsidiary transfers such
Property to another Person and Arch Coal or a Restricted Subsidiary leases it from such Person.

          “Securities Act” means the Securities Act of 1933, as amended.

          “Shelf Registration Statement” means the Shelf Registration Statement as defined in the
Registration Rights Agreement.

27

 

          “Significant Subsidiary” means any Subsidiary that would be a “significant subsidiary” of Arch
Coal within the meaning of Rule 1-02 under Regulation S-X promulgated by the Commission.

          “Special Interest” has the meaning set forth in Exhibit A.

          “Standard Securitization Undertakings” means representations, warranties, covenants and
indemnities entered into by Arch Coal or any Restricted Subsidiary that are reasonably customary in
receivables financing facilities, including, without limitation, servicing of the obligations
thereunder.

          “Stated Maturity” means, with respect to any security, the date specified in such security as
the fixed date on which the payment of principal of such security is due and payable, including
pursuant to any mandatory redemption provision (but excluding any provision providing for the
repurchase of such security at the option of the holder thereof upon the happening of any
contingency beyond the control of the issuer unless such contingency has occurred).

          “Subordinated Obligation” means any Debt of Arch Coal or a Guarantor (whether outstanding on
the Issue Date or thereafter Incurred) that is subordinate or junior in right of payment to the
Notes or the Note Guarantees pursuant to a written agreement to that effect.

          “Subsidiary” means, in respect of any Person, any corporation, company (including any limited
liability company), association, partnership, joint venture or other business entity of which at
least a majority of the total voting power of the Voting Stock is at the time owned or controlled,
directly or indirectly, by:

          (a) such Person;

          (b) such Person and one or more Subsidiaries of such Person; or

          (c) one or more Subsidiaries of such Person.

          “Surviving Person” means the surviving Person formed by a merger, consolidation or
amalgamation and, for purposes of the covenant described under Section 5.01 of this Indenture, a
Person to whom all or substantially all of the Property of Arch Coal or a Guarantor is sold,
transferred, assigned, leased, conveyed or otherwise disposed.

          “Tax Amount” means the portion of the Hypothetical Income Tax Amount (as defined in the LLC
Agreement as in effect on the Issue Date) allocated to the members of Arch Western, other than Arch
Coal or any of its Affiliates.

          “Tax Distribution” means a distribution in respect of taxes pursuant to clause (e) of the
second paragraph of Section 4.08 of this Indenture.

          “TIA” means the United States Trust Indenture Act of 1939 as in effect on the date hereof;
provided, however, that in the event the Trust Indenture Act of 1939 is amended after

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 such date, “TIA” means, to the extent required by any such amendment, the Trust Indenture Act
of 1939, as so amended.

          “Treasury Rate” means, as of any redemption date, the yield to maturity as of such redemption
date of United States Treasury securities with a constant maturity (as compiled and published in
the most recent Federal Reserve Statistical Release H.15 (519) that has become publicly available
at least two business days prior to the redemption date (or, if such Statistical Release is no
longer published, any publicly available source of similar market data)) most nearly equal to the
period from the redemption date to August 1, 2013; provided, however, that if the period from the
redemption date to August 1, 2013 is less than one year, the weekly average yield on actually
traded United States Treasury securities adjusted to a constant maturity of one year will be used.

          “Trustee” means the party named as such in this Indenture until a successor replaces it in
accordance with the provisions of this Indenture and, thereafter, means the successor.

          “Trust Officer” means, when used with respect to the Trustee, any vice president, assistant
vice president, assistant treasurer or trust officer within the Corporate Trust Department of the
Trustee (or any successor unit, department or division of the Trustee) located at the Corporate
Trust Office of the Trustee who has direct responsibility for the administration of this Indenture
and, for the purposes of Sections 7.01(c)(2) and the second sentence of Section 6.01(b) shall also
include any other officer of the Trustee to whom any corporate trust matter is referred because of
his or her knowledge of and familiarity with the particular subject.

          “Unrestricted Subsidiary” means:

          (a) any Subsidiary of Arch Coal that is designated after the Issue Date as an
Unrestricted Subsidiary as permitted or required pursuant to the covenant described under
Section 4.15 of this Indenture and is not thereafter redesignated as a Restricted Subsidiary
as permitted pursuant thereto; and

          (b) any Subsidiary of an Unrestricted Subsidiary.

After the termination of the covenants upon the Notes obtaining Investment Grade Ratings, pursuant
to Section 4.21 of this Indenture, all Unrestricted Subsidiaries shall be Restricted Subsidiaries.

          “U.S. Government Obligations” means direct obligations (or certificates representing an
ownership interest in such obligations) of the United States of America (including any agency or
instrumentality thereof) for the payment of which the full faith and credit of the United States of
America is pledged and which are not callable or redeemable at the issuer’s option.

          “Voting Stock” of any Person means all classes of Capital Stock or other interests (including
partnership interests) of such Person then outstanding and normally entitled (without regard to the
occurrence of any contingency) to vote in the election of directors, managers or trustees thereof.

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          “Wholly Owned Restricted Subsidiary” of a Person means, at any time, a Restricted Subsidiary
all the Voting Stock of which (except directors’ qualifying shares) is at such time owned, directly
or indirectly, by such Person and its other Wholly Owned Subsidiaries.

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               SECTION 1.02. Other Definitions.

			
	Term	 	Defined in Section
	“Additional Notes”
	 	Recitals
	“Affiliate Transaction”
	 	4.10
	“Allocable Excess Proceeds”
	 	4.09
	“Change of Control Offer”
	 	4.11
	“Change of Control Purchase Price”
	 	4.11
	“Defaulted Interest”
	 	2.12
	“Event of Default”
	 	6.01
	“Excess Proceeds”
	 	4.09(b)
	“Exchange Global Note”
	 	2.01(b)
	“Global Notes”
	 	2.01(c)
	“incorporated provision”
	 	12.01
	“Notice of Default”
	 	6.01(a)(4)
	“Obligations”
	 	10.01(a)
	“Original Notes”
	 	Recitals
	“Notes”
	 	Recitals
	“Participants”
	 	2.01(d)
	“Paying Agent”
	 	2.03
	“Permitted Debt”
	 	4.06
	“Prepayment Offer
	 	4.09
	“Registrar”
	 	2.03
	“Regulation S Global Note”
	 	2.01(b)
	“Restricted Global Note”
	 	2.01(b)
	“Security Register”
	 	2.03
	“Transfer Agent”
	 	2.03

               SECTION 1.03. Incorporation by Reference of Trust Indenture Act. The mandatory
provisions of the TIA that are required to be a part of and govern indentures qualified under the
TIA are incorporated by reference in and are a part of this Indenture, whether or not this
Indenture is so qualified. The following TIA terms have the following meanings as used in this
Indenture:

     “Commission” means the SEC.

     “indenture securities” means the Notes.

     “indenture securities holder” means a Holder.

     “indenture to be qualified” means this Indenture.

     “indenture trustee” or “institutional trustee” means the Trustee.

     “obligor” on the “indenture securities” means Arch Coal and the Guarantors.

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     All other TIA terms used in this Indenture that are defined by the TIA, defined by TIA
reference to another statute or defined by the Commission rule under the TIA have the meanings
assigned to them by such definitions.

               SECTION 1.04. Rules of Construction. (a) Unless the context otherwise requires:

          (i) a term has the meaning assigned to it;

          (ii) an accounting term not otherwise defined has the meaning assigned to it in
accordance with GAAP;

          (iii) “or” is not exclusive;

          (iv) “including” or “include” means including or include without limitation;

          (v) words in the singular include the plural and words in the plural include the
singular;

          (vi) “interest” shall include Special Interest, if any;

     (vii) the words “herein,” “hereof” and “hereunder” and other words of similar import
refer to this Indenture as a whole and not to any particular Article, Section, clause or
other subdivision

     (viii) unless otherwise specified herein, all accounting terms used herein shall be
interpreted, all accounting determinations hereunder shall be made, and all financial
statements required to be delivered hereunder shall be prepared in accordance with GAAP as
in effect from time to time, applied on a basis consistent with the most recent audited
consolidated financial statements of the Company;

     (ix) “$,” “U.S. Dollars” and “United States Dollars” each refer to United States
dollars, or such other money of the United States that at the time of payment is legal
tender for payment of public and private debts; and

     (x) whenever in this Indenture there is mentioned, in any context, principal, interest
or any other amount payable under or with respect to any Note, such mention shall be deemed
to include mention of the payment of Special Interest to the extent that, in such context,
Special Interest is, was or would be payable in respect thereof.

ARTICLE TWO

THE NOTES

               SECTION 2.01. The Notes. (a) The Trustee shall initially authenticate Notes for
original issue on the Issue Date in an aggregate principal amount of $600,000,000 upon a written
order of Arch Coal in the form of an Officers’ Certificate of the Company (other than as provided
in Section 2.07). The Company may, as long as permitted under this Indenture, issue and the
Trustee shall authenticate (1) the Exchange Notes and (2) Additional Notes after

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the Issue Date in unlimited amount for original issue upon a written order of the Company in
the form of an Officers’ Certificate in aggregate principal amount as specified in such order.
Each such written order shall specify the amount of Notes to be authenticated and the date on which
such Notes are to be authenticated.

          (b) Form and Dating. The Notes and the Trustee’s certificate of authentication
shall be substantially in the form of Exhibit A hereto with such appropriate insertions,
omissions, substitutions and other variations as are required or permitted by this Indenture.
The Notes may have notations, legends or endorsements required by law, the rules of any
securities exchange or usage. Arch Coal shall approve the form of the Notes. Each Note shall
be dated the date of its authentication. The terms and provisions contained in the form of
the Notes shall constitute and are hereby expressly made a part of this Indenture. The Notes
shall be issued only in registered form without coupons and only in minimum denominations of
$2,000 in principal amount and any integral multiples of $1,000 in excess thereof.

          (c) Global Notes. Notes offered and sold to QIBs in reliance on Rule 144A as
provided in the Purchase Agreement shall be issued initially in the form of one or more Global
Notes substantially in the form of Exhibit A hereto, with such applicable legends as are
provided in Exhibit A hereto, except as otherwise permitted herein (the “Restricted Global
Note”), which shall be deposited on behalf of the purchasers of the Notes represented
thereby with the Depositary, and registered in the name of the Depositary or its nominee, as
the case may be, duly executed by Arch Coal and authenticated by the Trustee (or its agent in
accordance with Section 2.02) as hereinafter provided. The aggregate principal amount of the
Restricted Global Note may from time to time be increased or decreased by adjustments made by
the Registrar on Schedule A to the Restricted Global Note and recorded in the Security
Register, as hereinafter provided. Notes offered and sold in reliance on Regulation S shall
be issued initially in the form of one or more Global Notes substantially in the form of
Exhibit A hereto, with such applicable legends as are provided in Exhibit A hereto, except as
otherwise permitted herein (the “Regulation S Global Note”), which shall be deposited
on behalf of the purchasers of the Notes represented thereby with the Depositary, and
registered in the name of the Depositary or its nominee, as the case may be, duly executed by
Arch Coal and authenticated by the Trustee (or an authenticating agent appointed by the
Trustee in accordance with Section 2.02) as hereinafter provided. The aggregate principal
amount of the Regulation S Global Note may from time to time be increased or decreased by
adjustments made by the Registrar on Schedule A to the Regulation S Global Note and recorded
in the Security Register, as hereinafter provided.

          If and when issued, Exchange Notes offered to Holders, as provided in the Registration Rights
Agreement, shall be issued initially in the form of one or more Global Notes substantially in the
form of Exhibit A hereto, with such applicable omissions and legends as are provided in Exhibit A
hereto, except as otherwise permitted herein (the “Exchange Global Note”), which shall be
deposited on behalf of the Holders of the Exchange Notes represented thereby with the Depositary,
and registered in the name of the Depositary or its nominee, as the case may be, duly executed by
Arch Coal and authenticated by the Trustee (or an authenticating agent appointed by the Trustee in
accordance with Section 2.02) as hereinafter provided. The aggregate principal amount of the
Exchange Global Note may from time to time be increased or decreased by

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adjustments made by the Registrar on Schedule A to the Exchange Global Note and recorded in
the Security Register, as hereinafter provided.

          Upon the transfer, exchange or replacement of any Original Note remaining outstanding after
the consummation of an Exchange Offer, the Registrar shall deliver such new Original Note only in
global form, subject to Section 2.10, and such new Original Note shall continue to bear the
applicable legends set forth in Exhibit A hereto. In the case of a Restricted Global Note, such
legends shall include the private placement legend unless (x) the appropriate period referred to in
Rule 144 under the Securities Act has elapsed or (y) there is delivered to the Registrar an opinion
of counsel reasonably satisfactory to Arch Coal and the Trustee to the effect that neither such
legend nor the related restrictions on transfer are required in order to maintain compliance with
the Securities Act.

          Upon the transfer, exchange or replacement of any Note pursuant to a Shelf Registration
Statement, the Registrar shall deliver such new Note only in global form, subject to Section 2.10,
and such new Note shall continue to bear the applicable legends set forth in Exhibit A hereto;
provided, however, that such new Note shall not be required to bear the private placement legend
set forth in Exhibit A hereto. Beneficial interests in any such new Note shall be reflected in the
Exchange Global Note.

          (d) Book-Entry Provisions. This Section 2.01(d) shall apply to the Restricted
Global Note, the Regulation S Global Note, and, if and when issued, the Exchange Global Note
(collectively, the “Global Notes”) deposited with or on behalf of the Depositary.

          Members of, or participants and account holders in, DTC (“Participants”) shall have no rights
under this Indenture with respect to any Global Note held on their behalf by the Depositary, or by
the Trustee or any custodian of the Depositary or under such Global Note, and the Depositary or its
nominee may be treated by Arch Coal, a Guarantor, the Trustee and any agent of Arch Coal, a
Guarantor or the Trustee as the sole owner of such Global Note for all purposes whatsoever.
Notwithstanding the foregoing, nothing herein shall prevent Arch Coal, a Guarantor, the Trustee or
any agent of Arch Coal, a Guarantor or the Trustee from giving effect to any written certification,
proxy or other authorization furnished by the Depositary or impair, as between the Depositary and
their Participants, the operation of customary practices of such persons governing the exercise of
the rights of a Holder of a beneficial interest in any Global Note.

          Subject to the provisions of Section 2.10(b), the registered Holder of a Global Note may grant
proxies and otherwise authorize any Person, including Participants and Persons that may hold
interests through Participants, to take any action that a Holder is entitled to take under this
Indenture or the Notes.

          Except as provided in Section 2.10, owners of a beneficial interest in Global Notes will not
be entitled to receive physical delivery of certificated Notes.

               SECTION 2.02. Execution and Authentication. An authorized officer shall sign the
Notes for Arch Coal by manual or facsimile signature.

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          If an authorized officer whose signature is on a Note no longer holds that office at the time
the Trustee authenticates the Note, the Note shall be valid nevertheless.

          A Note shall not be valid or obligatory for any purpose until an authorized signatory of the
Trustee manually signs the certificate of authentication on the Note. The signature shall be
conclusive evidence that the Note has been authenticated under this Indenture.

          Pursuant to an Issuer Order, Arch Coal shall execute and the Trustee shall authenticate (a)
Original Notes for original issue up to an aggregate principal amount of $600,000,000, and (b)
Additional Notes subject to compliance at the time of issuance of such Additional Notes with the
provisions of this Indenture in an unlimited amount and Exchange Notes for issue only in an
Exchange Offer, pursuant to the Registration Rights Agreement, for Notes up to an aggregate
principal amount of Original Notes and Additional Notes exchanged in such Exchange Offer.

          The Trustee may appoint an authenticating agent reasonably acceptable to Arch Coal to
authenticate the Notes. Unless limited by the terms of such appointment, any such authenticating
agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by any such agent. An authenticating agent
has the same rights as any Registrar, co-Registrar Transfer Agent or Paying Agent to deal with Arch
Coal or an Affiliate of Arch Coal.

          The Trustee shall have the right to decline to authenticate and deliver any Notes under this
Section 2.02 if the Trustee, being advised by counsel, determines that such action may not lawfully
be taken or if the Trustee in good faith shall determine that such action would expose the Trustee
to personal liability to existing Holders.

               SECTION 2.03. Registrar, Transfer Agent and Paying Agent. Arch Coal shall maintain an
office or agency for the registration of the Notes and of their transfer or exchange (the
“Registrar”), an office or agency where Notes may be transferred or exchanged (the
“Transfer Agent”), an office or agency where the Notes may be presented for payment (the
“Paying Agent”) and an office or agency where notices or demands to or upon Arch Coal in
respect of the Notes may be served. Arch Coal may appoint one or more Transfer Agents, one or more
co-Registrars and one or more additional Paying Agents.

          Arch Coal or any its Affiliates may act as Transfer Agent, Registrar, co-Registrar, Paying
Agent and agent for service of notices and demands in connection with the Notes; provided, however,
that neither Arch Coal nor any of its Affiliates shall act as Paying Agent for the purposes of
Articles Three and Eight and Sections 4.09 and 4.11.

          Arch Coal hereby initially appoints the Trustee, at the address set forth in Section 12.02(a)
as Registrar and as Transfer Agent and Paying Agent.

          Subject to any applicable laws and regulations, Arch Coal shall cause the Registrar to keep a
register (the “Security Register”) at its corporate trust office in which, subject to such
reasonable regulations it may prescribe, Arch Coal shall provide for the registration of ownership,
exchange, and transfer of the Notes. Such registration in the Security Register shall be
conclusive evidence of the ownership of Notes. Included in the books and records for the Notes
shall be notations as to whether such Notes have been paid, exchanged or transferred,

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canceled, lost, stolen, mutilated or destroyed and whether such Notes have been replaced. In
the case of the replacement of any of the Notes, the Registrar shall keep a record of the Note so
replaced and the Note issued in replacement thereof. In the case of the cancellation of any of the
Notes, the Registrar shall keep a record of the Note so canceled and the date on which such Note
was canceled.

          Arch Coal shall enter into an appropriate agency agreement with any Paying Agent or
co-Registrar not a party to this Indenture, which, following the effectiveness of a Registration
Statement pursuant to the Registration Rights Agreement, shall incorporate the terms of the TIA.
The agreement shall implement the provisions of this Indenture that relate to such agent. Arch
Coal shall notify the Trustee of the name and address of any such agent. If Arch Coal fails to
maintain a Registrar or Paying Agent, the Trustee shall act as such and shall be entitled to
appropriate compensation therefor pursuant to Section 7.07 of this Indenture.

               SECTION 2.04. Paying Agent to Hold Money in Trust. Not later than 10:00 am (Central
time) on each due date of the principal, premium, if any, and interest on any Notes, Arch Coal
shall deposit with the Paying Agent money in immediately available funds sufficient to pay such
principal, premium, if any, and interest so becoming due on the due date for payment under the
Notes. Arch Coal shall require each Paying Agent other than the Trustee to agree in writing that
such Paying Agent shall hold in trust for the benefit of the Holders or the Trustee all money held
by the Paying Agent for the payment of principal of, premium, if any, and interest on the Notes
(whether such money has been paid to it by Arch Coal or any other obligor on the Notes), and such
Paying Agent shall promptly notify the Trustee of any default by Arch Coal (or any other obligor on
the Notes) in making any such payment. Arch Coal at any time may require a Paying Agent to pay all
money held by it to the Trustee and account for any funds disbursed, and the Trustee may at any
time during the continuance of any payment default, upon written request to a Paying Agent, require
such Paying Agent to pay all money held by it to the Trustee and to account for any funds
disbursed. Upon doing so, the Paying Agent shall have no further liability for the money so paid
over to the Trustee. If Arch Coal or any Affiliate of Arch Coal acts as Paying Agent, it will, on
or before each due date of any principal, premium, if any, or interest on the Notes, segregate and
hold in a separate trust fund for the benefit of the Holders a sum of money sufficient to pay such
principal, premium, if any, or interest so becoming due until such sum of money shall be paid to
such Holders or otherwise disposed of as provided in this Indenture, and will promptly notify the
Trustee of its action or failure to act.

               SECTION 2.05. Holder Lists and Registration Rights Agreements. (a) The Registrar
shall preserve in as current a form as is reasonably practicable the most recent list available to
it of the names and addresses of Holders and shall otherwise comply with TIA Section 312(a). If
the Trustee is not the Registrar, Arch Coal shall furnish to the Trustee, in writing no later than
the Record Date for each Interest Payment Date and at such other times as the Trustee may request
in writing, a list in such form and as of such Record Date as the Trustee may reasonably require of
the names and addresses of Holders, including the aggregate principal amount of Notes held by each
Holder.

          (b) The Trustee shall maintain copies of the Registration Rights Agreement available for
inspection by Holders during normal business hours at its Corporate Trust

36

 

Office for so long as there are Notes outstanding that are subject to registration under
the Registration Rights Agreement.

               SECTION 2.06. Transfer and Exchange. (a) Where Notes are presented to the
Registrar or a co-Registrar with a request to register a transfer or to exchange them for an equal
principal amount of Notes of other denominations, the Registrar shall register the transfer or make
the exchange in accordance with the requirements of this Section 2.06. To permit registrations of
transfers and exchanges, Arch Coal shall execute and the Trustee shall authenticate and deliver, in
the name of the designated transferee or transferees, one or more new Notes, of any authorized
denominations and of a like aggregate principal amount, at the Registrar’s request. No service
charge shall be made for any registration of transfer or exchange of Notes (except as otherwise
expressly permitted herein), but Arch Coal may require payment of a sum sufficient to cover any
agency fee or similar charge payable in connection with any such registration of transfer or
exchange of Notes (other than any agency fee or similar charge payable upon exchanges pursuant to
Sections 2.10, 3.08 or 9.05) or in accordance with a Prepayment Offer pursuant to Section 4.09 or
Change of Control Offer pursuant to Section 4.11, not involving a transfer.

          Upon presentation for exchange or transfer of any Note as permitted by the terms of this
Indenture and by any legend appearing on such Note, such Note shall be exchanged or transferred
upon the Security Register and one or more new Notes shall be authenticated and issued in the name
of the Holder (in the case of exchanges only) or the transferee, as the case may be. No exchange
or transfer of a Note shall be effective under this Indenture unless and until such Note has been
registered in the name of such Person in the Security Register. Furthermore, the exchange or
transfer of any Note shall not be effective under this Indenture unless the request for such
exchange or transfer is made by the Holder or by a duly authorized attorney-in-fact at the office
of the Registrar.

          Every Note presented or surrendered for registration of transfer or for exchange shall (if so
required by Arch Coal or the Registrar) be duly endorsed, or be accompanied by a written instrument
or transfer, in form satisfactory to Arch Coal and the Registrar, duly executed by the Holder
thereof or his attorney duly authorized in writing.

          All Notes issued upon any registration of transfer or exchange of Notes shall be the valid
obligations of Arch Coal evidencing the same indebtedness, and entitled to the same benefits under
this Indenture, as the Notes surrendered upon such registration of transfer or exchange.

          In the event that Arch Coal delivers to the Trustee a copy of an Officers’ Certificate
certifying that a registration statement under the Securities Act with respect to the Exchange
Offer, or a Shelf Registration Statement, as the case may be, has been declared effective by the
Commission, and that Arch Coal has offered Exchange Notes to the Holders in accordance with the
Exchange Offer or that Notes have been offered pursuant to such Shelf Registration Statement, the
Trustee shall exchange or issue upon transfer, as the case may be, upon request of any Holder, such
Holder’s Notes for (i) in the case of an Exchange Offer, Exchange Notes upon the terms set forth in
the Exchange Offer or (ii) in the case of a transfer pursuant to a Shelf Registration Statement,
Notes that comply with the requirements applicable following such a transfer as set forth in
Section 2.01(c).

37

 

          Arch Coal shall not be required (i) to issue, register the transfer of, or exchange any Note
during a period beginning at the opening of 15 Business Days before the day of the mailing of a
notice of redemption of Notes selected for redemption under Section 3.02 and ending at the close of
business on the day of such mailing, or (ii) to register the transfer of or exchange any Note so
selected for redemption in whole or in part, except the unredeemed portion of any Note being
redeemed in part.

          (b) Notwithstanding any provision to the contrary herein, so long as a Global Note
remains outstanding and is held by or on behalf of the Depositary, transfers of a Global Note,
in whole or in part, or of any beneficial interest therein, shall only be made in accordance
with Section 2.01(d), Section 2.06(a) and this Section 2.06(b); provided, however, that a
beneficial interest in a Global Note may be transferred to Persons who take delivery thereof
in the form of a beneficial interest in the same Global Note in accordance with the transfer
restrictions set forth in the restricted Note legend on the Note, if any.

               (i) Except for transfers or exchanges made in accordance with any of clauses (ii),
(iii), (iv) or (v) of this Section 2.06(b), transfers of a Global Note shall be limited to
transfers of such Global Note in whole, but not in part, to nominees of the Depositary or to
a successor of the Depositary or such successor’s nominee.

               (ii) Restricted Global Note to Regulation S Global Note. If the Holder of a
beneficial interest in the Restricted Global Note at any time wishes to exchange its
interest in such Restricted Global Note for an interest in the Regulation S Global Note, or
to transfer its interest in such Restricted Global Note to a Person who wishes to take
delivery thereof in the form of a beneficial interest in the Regulation S Global Note, such
transfer or exchange may be effected, only in accordance with this clause (ii) and the rules
and procedures of the Depositary. Upon receipt by the Registrar from the Transfer Agent of
(A) instructions directing the Registrar to credit or cause to be credited an interest in
the Regulation S Global Note in a specified principal amount and to cause to be debited an
interest in the Restricted Global Note in such specified principal amount, and (B) a
certificate in the form of Exhibit B attached hereto given by the Holder of such beneficial
interest stating that the transfer of such interest has been made in compliance with the
transfer restrictions applicable to the Global Notes and (x) pursuant to and in accordance
with Regulation S or (y) that the Note being transferred is being transferred in a
transaction permitted by Rule 144, then the Registrar shall instruct the Depositary to
reduce or cause to be reduced the principal amount of the Restricted Global Note and to
increase or cause to be increased the principal amount of the Regulation S Global Note by
the aggregate principal amount of the interest in the Restricted Global Note to be
exchanged.

               (iii) Regulation S Global Note to Restricted Global Note. If the Holder of a
beneficial interest in the Regulation S Global Note at any time wishes to transfer such
interest to a Person who wishes to take delivery thereof in the form of a beneficial
interest in the Restricted Global Note, such transfer may be effected only in accordance
with this clause (iii) and the rules and procedures of the Depositary. Upon receipt by the
Registrar from the Transfer Agent of (A) instructions directing the Registrar to credit or
cause to be credited an interest in the Restricted Global Note in a specified principal
amount and to

38

 

cause to be debited an interest in the Regulation S Global Note in such specified
principal amount, and (B) a certificate in the form of Exhibit C attached hereto given by
the Holder of such beneficial interest stating that the transfer of such interest has been
made in compliance with the transfer restrictions applicable to the Global Notes and stating
that (x) the Person transferring such Interest reasonably believes that the Person acquiring
such interest is a QIB and is obtaining such interest in a transaction meeting the
requirements of Rule 144A and any applicable securities laws of any state of the United
States or (y) that the Person transferring such interest is relying on an exemption other
than Rule 144A from the registration requirements of the Securities Act and, in such
circumstances, such Opinion of Counsel as Arch Coal or the Trustee may reasonably request to
ensure that the requested transfer or exchange is being made pursuant to an exemption from,
or in a transaction not subject to, the registration requirements of the Securities Act,
then the Registrar shall instruct the Depositary to reduce or cause to be reduced the
principal amount of the Regulation S Global Note and to increase or cause to be increased
the principal amount of the Restricted Global Note by the aggregate principal amount of the
interest in the Regulation S Global Note to be exchanged or transferred.

               (iv) Restricted Global Note to Exchange Global Note. Following the earlier of
the consummation of the Exchange Offer or the transfer of a Note pursuant to a Shelf
Registration Statement that results in beneficial interests in such Note being reflected in
the Exchange Global Note, if the Holder of a beneficial interest in the Restricted Global
Note at any time wishes to exchange its interest in such Restricted Global Note for an
interest in the Exchange Global Note, or to transfer its interest in such Restricted Global
Note to a Person who wishes to take delivery thereof in the form of a beneficial interest in
the Regulation S Global Note, such transfer or exchange, if not effected pursuant to Section
2.06(a) may be effected only in accordance with this clause (iv) and the rules and
procedures of the Depositary. Upon receipt by the Registrar from the Transfer Agent of (A)
instructions directing the Registrar to credit or cause to be credited an interest in the
Exchange Global Note in a specified principal amount and to cause to be debited an interest
in the Restricted Global Note in such specified principal amount, and (B) a certificate in
the form of Exhibit B attached hereto given by the Holder of such beneficial interest
stating that the transfer of such interest has been made in compliance with the transfer
restrictions applicable to the Global Notes and (x) pursuant to and in accordance with
Regulation S or (y) that the Note being transferred is being transferred in a transaction
permitted by Rule 144, then the Registrar shall instruct the Depositary to reduce or cause
to be reduced the principal amount of the Restricted Global Note and to increase or cause to
be increased the principal amount of the Regulation S Global Note by the aggregate principal
amount of the interest in the Restricted Global Note to be exchanged or transferred.

               (v) Regulation S Global Note to Exchange Global Note. Following the earlier of
the consummation of the Exchange Offer or the transfer of a Note pursuant to a Shelf
Registration Statement that results in beneficial interests in such Note being reflected in
the Exchange Global Note, if the Holder of a beneficial interest in the Regulation S Global
Note at any time wishes to exchange its interest in such Regulation S Global Note for an
interest in the Exchange Global Note, or to transfer its interest in such Regulation

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S Global Note to a Person who wishes to take delivery thereof in the form of a
beneficial interest in the Exchange Global Note, such transfer or exchange, if not effected
pursuant to an Exchange Offer or a Shelf Registration Statement in accordance with Section
2.06(a) may be effected only in accordance with this clause (v) and the rules and procedures
of the Depositary. Upon receipt by the Registrar from the Transfer Agent of instructions
directing the Registrar to credit or cause to be credited an interest in the Exchange Global
Note in a specified principal amount and to cause to be debited an interest in the
Regulation S Global Note in such specified principal amount, then the Registrar shall
instruct the Depositary to reduce or cause to be reduced the principal amount of the
Regulation S Global Note and to increase or cause to be increased the principal amount of
the Exchange Global Note by the aggregate principal amount of the interest in the Regulation
S Global Note to be exchanged or transferred.

               (vi) Global Notes to Certificated Notes. In the event that a Global Note is
exchanged for Notes in certificated, registered form pursuant to Section 2.10, the
effectiveness of a Shelf Registration Statement with respect to such Notes, such Notes may
be exchanged only in accordance with Section 2.10 and such procedures as are substantially
consistent with the provisions of clauses (ii) and (iii) above (including the certification
requirements intended to ensure that such transfers comply with Rule 144A or Regulation S
under the Securities Act, as the case may be) and such other procedures as may from time to
time be adopted by Arch Coal and the Trustee.

          (c) Except in connection with an Exchange Offer or a Shelf Registration Statement
contemplated by and in accordance with the terms of the Registration Rights Agreement, if
Notes are issued upon the transfer, exchange or replacement of Notes bearing the restricted
Notes legends set forth in Exhibit A hereto, the Notes so issued shall bear the restricted
Notes legends, and a request to remove such restricted Notes legends from Notes will not be
honored unless there is delivered to Arch Coal such satisfactory evidence, which may include
an Opinion of Counsel licensed to practice law in the State of New York, as may be reasonably
required by Arch Coal, that neither the legend nor the restrictions on transfer set forth
therein are required to ensure that transfers thereof comply with the provisions of Rule 144A
or Rule 144 under the Securities Act. Upon provision of such satisfactory evidence, the
Trustee, at the direction of Arch Coal, shall authenticate and deliver Notes that do not bear
the legend.

          (d) The Trustee shall have no responsibility for any actions taken or not taken by the
Depositary, for any Depositary records or beneficial ownership interests or for any
transactions between the Depositary and any Agent Member or between or among the Depositary, a
participant and/or any holder or owner of a beneficial interest in a Global Note.

          (e) The Trustee shall have no obligation or duty to monitor, determine or inquire as to
compliance with any restrictions on transfer imposed under this Indenture or under applicable
law with respect to any transfer of any interest in any Notes (including any transfers between
or among the Depositary’s participants or beneficial owners of interests in any Global Note)
other than to require delivery of such certificates and other documentation, including
delivery of Opinions of Counsel, as is expressly required by, and

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to do so if and when expressly required by, the terms of this Indenture and to examine
the same to determine substantial compliance as to form with the express requirements hereof.

               SECTION 2.07. Replacement Notes. If a mutilated certificated Note is surrendered to
the Registrar or if the Holder claims that the Note has been lost, destroyed or wrongfully taken,
Arch Coal shall issue and the Trustee shall authenticate a replacement Note in such form as the
Note mutilated, lost, destroyed or wrongfully taken if the Holder satisfies any other reasonable
requirements of the Trustee or Arch Coal. If required by the Trustee or Arch Coal, such Holder
shall furnish an indemnity or indemnity bond sufficient in the judgment of Arch Coal and the
Trustee to protect Arch Coal, the Trustee, the Paying Agent, the Transfer Agent, the Registrar and
any co-Registrar, and any authenticating agent from any loss that any of them may suffer if a Note
is replaced. Arch Coal and the Trustee may charge the Holder for their expenses in replacing a
Note.

          Every replacement Note shall be an additional obligation of Arch Coal.

               SECTION 2.08. Outstanding Notes. Notes outstanding at any time are all Notes
authenticated by the Trustee except for those cancelled by it, those delivered to it for
cancellation and those described in this Section 2.08 as not outstanding. A Note does not cease to
be outstanding because Arch Coal or an Affiliate of Arch Coal holds the Note.

          If a Note is replaced pursuant to Section 2.07, it ceases to be outstanding unless the Trustee
and Arch Coal receive proof satisfactory to them that the Note which has been replaced is held by a
bona fide purchaser.

          If the Paying Agent segregates and holds in trust, in accordance with this Indenture, on a
Redemption Date or maturity date money sufficient to pay all principal, premium, if any, interest
payable on that date with respect to the Notes (or portions thereof) to be redeemed or maturing, as
the case may be, and the Paying Agent is not prohibited from paying such money to the Holders on
that date pursuant to the terms of this Indenture, then on and after that date such Notes (or
portions thereof) cease to be outstanding and interest on them ceases to accrue.

               SECTION 2.09. Notes Held by Arch Coal. In determining whether the Holders of the
required principal amount of Notes have concurred in any direction or consent or any amendment,
modification or other change to this Indenture, Notes owned by Arch Coal or by an Affiliate of Arch
Coal shall be disregarded and treated as if they were not outstanding, except that for the purposes
of determining whether the Trustee shall be protected in relying on any such direction, waiver or
consent or any amendment, modification or other change to this Indenture, only Notes which a Trust
Officer of the Trustee actually knows are so owned shall be so disregarded. Notes so owned which
have been pledged in good faith shall not be disregarded if the pledgee establishes to the
satisfaction of the Trustee the pledgee’s right so to act with respect to the Notes and that the
pledgee is not Arch Coal or an Affiliate of Arch Coal.

               SECTION 2.10. Certificated Notes. (a) A Global Note deposited with the Depositary
or other custodian for the Depositary pursuant to Section 2.01 shall be transferred to the
beneficial owners thereof in the form of certificated Notes only if such transfer complies with
Section 2.06 and (i) the Depositary notifies Arch Coal that it is unwilling or unable to continue
as

41

 

the Depositary for such Global Note, or if at any time the Depositary ceases to be a “clearing
agency” registered under the Exchange Act and a successor depositary is not appointed by Arch Coal
within 90 days of such notice, or (ii) Arch Coal, at its option, executes and delivers to the
Trustee a notice that such Global Note be so transferable, registrable and exchangeable, or (iii)
an Event of Default, or an event which after notice or lapse of time or both would be an Event of
Default, has occurred and is continuing with respect to the Notes or (iv) the issuance of such
certificated Notes is necessary in order for a Holder or beneficial owner to present its Note or
Notes to a Paying Agent in order to avoid any tax that is imposed on or with respect to a payment
made to such Holder or beneficial owner. Notice of any such transfer shall be given by Arch Coal
in accordance with the provisions of Section 12.02(a).

          (b) Any Global Note that is transferable to the beneficial owners thereof in the form of
certificated Notes pursuant to this Section 2.10 shall be surrendered by the Depositary to the
Transfer Agent, to be so transferred, in whole or from time to time in part, without charge,
and the Trustee shall authenticate and deliver, upon such transfer of each portion of such
Global Note, an equal aggregate principal amount at maturity of Notes of authorized
denominations in the form of certificated Notes. Any portion of a Global Note transferred or
exchanged pursuant to this Section 2.10 shall be executed, authenticated and delivered only in
registered form in denominations of $2,000 and any integral multiples of $1,000 in excess
thereof and registered in such names as the Depositary shall direct. Subject to the
foregoing, a Global Note is not exchangeable except for a Global Note of like denomination to
be registered in the name of the Depositary or its nominee. In the event that a Global Note
becomes exchangeable for certificated Notes, payment of principal, premium, if any, and
interest on the certificated Notes will be payable, and the transfer of the certificated Notes
will be registrable, at the office or agency of Arch Coal maintained for such purposes in
accordance with Section 2.03. Such certificated Notes shall bear the applicable legends set
forth in Exhibit A hereto.

          (c) In the event of the occurrence of any of the events specified in Section 2.10, Arch
Coal will promptly make available to the Trustee a reasonable supply of certificated Notes in
definitive, fully registered form without interest coupons.

               SECTION 2.11. Cancellation. Arch Coal at any time may deliver Notes to the Trustee
for cancellation. The Registrar and the Paying Agent shall forward to the Trustee any Notes
surrendered to them for registration of transfer, exchange or payment. The Trustee, in accordance
with its customary procedures, and no one else shall cancel (subject to the record retention
requirements of the Exchange Act and the Trustee’s retention policy) all Notes surrendered for
registration of transfer, exchange, payment or cancellation and dispose of such cancelled Notes in
its customary manner. Except as otherwise provided in this Indenture Arch Coal may not issue new
Notes to replace Notes it has redeemed, paid or delivered to the Trustee for cancellation.

               SECTION 2.12. Defaulted Interest. Any interest on any Note that is payable, but is
not punctually paid or duly provided for, on the dates and in the manner provided in the Notes and
this Indenture (all such interest herein called “Defaulted Interest”) shall forthwith cease
to be payable to the Holder on the relevant Record Date by virtue of having been

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such Holder, and such Defaulted Interest may be paid by Arch Coal, at its election in each
case, as provided in clause (a) or (b) below:

          (a) Arch Coal may elect to make payment of any Defaulted Interest to the Persons in whose
names the Notes are registered at the close of business on a special Record Date for the
payment of such Defaulted Interest, which shall be fixed in the following manner. Arch Coal
shall notify the Trustee in writing of the amount of Defaulted Interest proposed to be paid on
each Note and the date of the proposed payment, and at the same time Arch Coal may deposit
with the Trustee an amount of money equal to the aggregate amount proposed to be paid in
respect of such Defaulted Interest; or shall make arrangements satisfactory to the Trustee for
such deposit prior to the date of the proposed payment, such money when deposited to be held
in trust for the benefit of the Persons entitled to such Defaulted Interest as in this clause
provided. In addition, Arch Coal shall fix a special Record Date for the payment of such
Defaulted Interest, such date to be not more than 15 days and not less than 10 days prior to
the proposed payment date and not less than 15 days after the receipt by the Trustee of the
notice of the proposed payment date. Arch Coal shall promptly but, in any event, not less
than 15 days prior to the special Record Date, notify the Trustee of such special Record Date
and, in the name and at the expense of Arch Coal, the Trustee shall cause notice of the
proposed payment date of such Defaulted Interest and the special Record Date therefor to be
mailed first-class, postage prepaid to each Holder as such Holder’s address appears in the
Security Register, not less than 10 days prior to such special Record Date. Notice of the
proposed payment date of such Defaulted Interest and the special Record Date therefor having
been so mailed, such Defaulted Interest shall be paid to the Persons in whose names the Notes
are registered at the close of business on such special Record Date and shall no longer be
payable pursuant to clause (b) below.

          (b) Arch Coal may make payment of any Defaulted Interest on the Notes in any other lawful
manner not inconsistent with the requirements of any securities exchange on which the Notes
may be listed, and upon such notice as may be required by such exchange, if, after notice
given by Arch Coal to the Trustee of the proposed payment date pursuant to this clause, such
manner of payment shall be deemed reasonably practicable.

          Subject to the foregoing provisions of this Section 2.12, each Note delivered under this
Indenture upon registration of transfer of or in exchange for or in lieu of any other Note shall
carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other
Note.

               SECTION 2.13. Computation of Interest. Interest on the Notes shall be computed on the
basis of a 360-day year comprised of twelve 30-day months.

               SECTION 2.14. CUSIP, ISIN and Common Code Numbers. Arch Coal in issuing the Notes may
use CUSIP, ISIN and Common Code numbers (if then generally in use), and, if so, the Trustee shall
use CUSIP, ISIN and Common Code numbers, as appropriate, in notices of redemption as a convenience
to Holders; provided, however, that any such notice may state that no representation is made as to
the correctness of such numbers or codes either as printed on the Notes or as contained in any
notice of a redemption and that reliance may be

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placed only on the other identification numbers
printed on the Notes, and any such redemption
shall not be affected by any defect in or omission of such numbers. Arch Coal will promptly
notify the Trustee of any change in the CUSIP, ISIN or Common Code numbers.

               SECTION 2.15. Issuance of Additional Notes and Exchange Notes. Arch Coal may, subject
to Section 4.06 of this Indenture, issue Additional Notes under this Indenture in accordance with
the procedures of Section 2.02. The Original Notes issued on the date of this Indenture and any
Additional Notes subsequently issued shall be treated as a single class for all purposes under this
Indenture.

ARTICLE THREE

REDEMPTION; OFFERS TO PURCHASE

               SECTION 3.01. Optional Redemption. Except as set forth in the next two paragraphs,
the Notes will not be redeemable at the option of Arch Coal prior to August 1, 2013. Starting on
that date, Arch Coal may redeem all or any portion of the Notes, at once or over time, after giving
the required notice under this Indenture. The Notes may be redeemed at the redemption prices set
forth below, plus accrued and unpaid interest to the redemption date (subject to the right of
Holders of record on the relevant Record Date to receive interest, if any, due on the relevant
interest payment date). The following prices are for Notes redeemed during the 12-month period
commencing on August 1, 2013 of the years set forth below, and are expressed as percentages of
principal amount:

	 	 	 	 	 
	 	 	Redemption
	Year	 	Price
	2013

	 	 	104.375	%
	2014

	 	 	102.188	%
	2015 and thereafter

	 	 	100.000	%

          In addition, at any time and from time to time, prior to August 1, 2012, Arch Coal may redeem
up to a maximum of 35% of the original aggregate principal amount of the Notes (calculated giving
effect to any issuance of Additional Notes) with the proceeds of one or more Public Equity
Offerings, at a redemption price equal to 108.750% of the principal amount thereof, plus accrued
and unpaid interest to the redemption date (subject to the right of Holders of record on the
relevant Record Date to receive interest due on the relevant interest payment date); provided,
however, that after giving effect to any such redemption, at least 65% of the original aggregate
principal amount of the Notes (calculated giving effect to any issuance of Additional Notes)
remains outstanding immediately after the occurrence of such redemption (excluding Notes held by
Arch Coal or any of its Subsidiaries). Any such redemption shall be made within 90 days after the
date of the closing of such Public Equity Offering upon not less than 30 nor more than 60 days’
prior notice.

          At any time prior to August 1, 2013, Arch Coal may, at its option, on one or more occasions
redeem all or a part of the Notes, upon not less than 30 nor more than 60 days’ prior notice, at a
redemption price equal to 100% of the principal amount of the Notes redeemed plus the Applicable
Premium as of the date of redemption, and, without duplication, accrued and

44

 

unpaid interest, if any, to the redemption date (subject to the rights of Holders of record on
the relevant record date to receive interest due on the relevant interest payment date).

          Any redemption pursuant to this Section 3.01 shall be made pursuant to the provisions of this
Article Three.

               SECTION 3.02. Notices to Trustee. If Arch Coal elects to redeem Notes pursuant to
Section 3.01, it shall notify the Trustee in writing of the Redemption Date, the principal amount
of Notes to be redeemed and the paragraph of the Notes pursuant to which the redemption will occur.

          Arch Coal shall give each notice to the Trustee provided for in this Section 3.02 in writing
at least 45 days before the date notice is mailed to the Holders pursuant to Section 3.04 unless
the Trustee consents to a shorter period. Such notice shall be accompanied by an Officers’
Certificate from Arch Coal to the effect that such redemption will comply with the conditions
herein. If fewer than all the Notes are to be redeemed, the Record Date relating to such
redemption shall be selected by Arch Coal and given to the Trustee, which Record Date shall be not
less than 15 days after the date of notice to the Trustee.

          Except as otherwise provided herein, no notice or communication to the Trustee shall be deemed
effectively given unless it is actually received by a Trust Officer at its Corporate Trust Office.

               SECTION 3.03. Selection of Notes to be Redeemed. If less than all of the Notes are to
be redeemed, the Trustee shall select the Notes to be redeemed in compliance with the requirements,
as certified to it by Arch Coal, of the principal national securities exchange or automated
quotation system, if any, on which the Notes are listed or, if the Notes are not listed on a
national securities exchange or automated quotation system, by lot or by such other method as the
Trustee in its sole discretion shall deem fair and appropriate; provided, however, that no such
partial redemption shall reduce the portion of the principal amount of a Note not redeemed to less
than $2,000.

          The Trustee shall make the selection from the Notes outstanding and not previously called for
redemption. The Trustee may select for redemption portions equal to $2,000 in principal amount or
any integral multiple of $1,000. Provisions of this Indenture that apply to Notes called for
redemption also apply to portions of Notes called for redemption. The Trustee shall notify Arch
Coal and the Registrar promptly in writing of the Notes or portions of Notes to be called for
redemption.

               SECTION 3.04. Notice of Redemption. (a) At least 30 days but not more than 60 days
before a date for redemption of Notes, Arch Coal shall deliver a notice of redemption to each
Holder to be redeemed and shall comply with the provisions of Section 12.02(b).

          (b) The notice shall identify the Notes to be redeemed (including CUSIP, ISIN and Common
Code numbers) and shall state:

          (i) the Redemption Date;

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     (ii) the Redemption Price and the amount of accrued interest, if any to be paid;

     (iii) the name and address of the Paying Agent;

     (iv) that Notes called for redemption must be surrendered to the Paying Agent to
collect the Redemption Price plus accrued interest, if any;

     (v) that, if any Note is being redeemed in part, the portion of the principal amount
(equal to $1,000 in principal amount or any integral multiple thereof) of such Note to be
redeemed and that, on and after the Redemption Date, upon surrender of such Note, a new Note
or Notes in principal amount equal to the unredeemed portion thereof will be reissued;

     (vi) that, if any Note contains a CUSIP, ISIN or Common Code number, no representation
is being made as to the correctness of such CUSIP, ISIN or Common Code number either as
printed on the Notes or as contained in the notice of redemption and that reliance may be
placed only on the other identification numbers printed on the Notes;

     (vii) that, unless Arch Coal defaults in making such redemption payment, interest on
the Notes (or portion thereof) called for redemption shall cease to accrue on and after the
Redemption Date; and

     (viii) the paragraph of the Notes pursuant to which the Notes called for redemption are
being redeemed.

          At Arch Coal’s written request, the Trustee may give a notice of redemption in Arch Coal’s
name and at Arch Coal’s expense. In such event, Arch Coal shall provide the Trustee with the
notice and the other information required by this Section 3.04.

               SECTION 3.05. Effect of Notice of Redemption. Once a notice of redemption is mailed,
Notes called for redemption become due and payable on the Redemption Date and at the Redemption
Price stated in the notice. Upon surrender of any Notes to the Paying Agent, such Notes shall be
paid at the Redemption Price stated in the notice, plus accrued interest, if any, to the Redemption
Date. In any event, failure to give such notice, or any defect therein, shall not effect the
validity of the proceedings for the redemption of Notes held by Holders to whom such notice was
properly given.

               Notice of redemption shall be deemed to be given when mailed, whether or not the Holder
receives the notice. In any event, failure to give such notice, or any defect therein, shall not
affect the validity of the proceedings for the redemption of Notes held by Holders to whom such
notice was properly given.

               SECTION 3.06. Deposit of Redemption Price. On or prior to any Redemption Date, Arch
Coal shall deposit or cause to be deposited with the Paying Agent a sum in same day funds
sufficient to pay the Redemption Price of and accrued interest on all Notes to be redeemed on that
date other than Notes or portions of Notes called for redemption that have previously been
delivered by Arch Coal to the Trustee for cancellation. The Paying Agent shall return to Arch Coal
any money so deposited that is not required for that purpose.

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               SECTION 3.07. Payment of Notes Called for Redemption. If notice of redemption has
been given in the manner provided above, the Notes or portion of Notes specified in such notice to
be redeemed shall become due and payable on the Redemption Date at the Redemption Price stated
therein, together with accrued interest to such Redemption Date, and on and after such date (unless
Arch Coal shall default in the payment of such Notes at the Redemption Price and accrued interest
to the Redemption Date, in which case the principal, until paid, shall bear interest from the
Redemption Date at the rate prescribed in the Notes), such Notes shall cease to accrue interest.
Upon surrender of any Note for redemption in accordance with a notice of redemption, such Note
shall be paid and redeemed by Arch Coal at the Redemption Price, together with accrued interest, if
any, to the Redemption Date; provided, however, that installments of interest whose Stated Maturity
is on or prior to the Redemption Date shall be payable to the Holders registered as such at the
close of business on the relevant Record Date.

               SECTION 3.08. Notes Redeemed in Part. (a) Upon surrender of a Global Note that is
redeemed in part, the Paying Agent shall forward such Global Note to the Trustee who shall make a
notation on the Security Register to reduce the principal amount of such Global Note to an amount
equal to the unredeemed portion of the Global Note surrendered; provided, however, that each such
Global Note shall be in a principal amount at final Stated Maturity of $1,000 or an integral
multiple thereof.

          (b) Upon surrender and cancellation of a certificated Note that is redeemed in part, Arch
Coal shall execute and the Trustee shall authenticate for the Holder (at Arch Coal’s expense)
a new Note equal in principal amount to the unredeemed portion of the Note surrendered and
canceled; provided, however, that each such certificated Note shall be in a principal amount
at final Stated Maturity of $1,000 or an integral multiple thereof.

ARTICLE FOUR

COVENANTS

          SECTION 4.01. Payment of Notes. Each of Arch Coal and the Guarantors covenants and
agrees for the benefit of the Holders that it shall duly and punctually pay the principal of,
premium, if any, and interest on the Notes on the dates and in the manner provided in the Notes and
in this Indenture. Principal, premium, if any, and interest shall be considered paid on the date
due if on such date the Trustee or the Paying Agent (other than Arch Coal or any of its Affiliates)
holds, in accordance with this Indenture, money sufficient to pay all principal, premium, if any,
and interest then due. If Arch Coal or any of its Affiliates acts as Paying Agent, principal,
premium, if any, and interest shall be considered paid on the due date if the entity acting as
Paying Agent complies with Section 2.04.

          Each of Arch Coal or the Guarantors shall pay interest on overdue principal at the rate
specified therefor in the Notes. Arch Coal or the Guarantors shall pay interest on overdue
installments of interest at the same rate to the extent lawful.

               SECTION 4.02. Corporate Existence. Subject to Article Five, Arch Coal and each
Restricted Subsidiary shall do or cause to be done all things necessary to preserve and keep in
full force and effect their corporate, partnership, limited liability company or other

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existence and the rights (charter and statutory), licenses and franchises of Arch Coal and
each Restricted Subsidiary; provided, however, that Arch Coal shall not be required to preserve any
such right, licence or franchise if the Board of Directors of Arch Coal shall determine that the
preservation thereof is no longer desirable in the conduct of the business of Arch Coal and the
Restricted Subsidiaries as a whole and that the loss thereof is not disadvantageous in any material
respect to the Holders.

     SECTION 4.03. Maintenance of Properties. Arch Coal shall cause all properties owned
by it or any of its Subsidiaries or used or held for use in the conduct of its business or the
business of Arch Coal or any of its Subsidiaries to be maintained and kept in good condition,
repair and working order and supplied with all necessary equipment and shall cause to be made all
necessary repairs, renewals, replacements, betterments and improvements thereof, all as, in the
judgment of Arch Coal, may be necessary so that the business carried on in connection therewith may
be properly and advantageously conducted at all times; provided, however, that nothing in this
Section 4.03 shall prevent Arch Coal from discontinuing the maintenance of any such properties if
such discontinuance is, in the judgment of Arch Coal, desirable in the conduct of the business of
Arch Coal and its Subsidiaries as a whole and not disadvantageous in any material respect to the
Holders.

     SECTION 4.04. Insurance. Arch Coal shall maintain, and shall cause its Subsidiaries
to maintain, insurance with carriers believed by Arch Coal to be responsible, against such risks
and in such amounts, and with such deductibles, retentions, self-insured amounts and coinsurance
provisions, as Arch Coal believes are customarily carried by businesses similarly situated and
owning like properties, including as appropriate general liability, property and casualty loss and
interruption of business insurance.

     SECTION 4.05. Statement as to Compliance. (a) Arch Coal shall deliver to the
Trustee, within 90 days after the end of each fiscal year, an Officers’ Certificate stating that in
the course of the performance by the signer of its duties as an officer of Arch Coal he would
normally have knowledge of any Default and whether or not the signer knows of any Default that
occurred during such period and if any specifying such Default, its status and what action Arch
Coal is taking or proposed to take with respect thereto. For purposes of this Section 4.05(a),
such compliance shall be determined without regard to any period of grace or requirement of notice
under this Indenture.

     Arch Coal shall comply with TIA Section 314(a)(4). Arch Coal’s delivery to the Trustee of the
reports, information and documents required by said Section 314(a)(4) is for informational purposes
only and the Trustee’s receipt of such shall not constitute constructive notice of any information
contained therein or determinable from information contained therein, including Arch Coal’s
compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely
exclusively on Officers’ Certificates).

          (b) When any Default has occurred and is continuing under this Indenture, or if the
trustee of, or the holder of, any other evidence of Debt of Arch Coal or any Subsidiary
outstanding in a principal amount of $40,000,000 or more gives any notice stating that it is a
Notice of Default or takes any other action to accelerate such Debt or enforce any Note
therefor, Arch Coal shall deliver to the Trustee within five Business Days by registered or

48

 

certified mail or facsimile transmission an Officers’ Certificate specifying such
event, notice or other action, its status and what action Arch Coal is taking or proposes to
take with respect thereto.

               SECTION 4.06. Limitation on Debt. Arch Coal shall not, and shall not permit any
Restricted Subsidiary to, Incur, directly or indirectly, any Debt unless, after giving effect to
the application of the proceeds thereof, no Default or Event of Default would occur as a
consequence of such Incurrence or be continuing following such Incurrence and either:

          (1) such Debt is Debt of Arch Coal or a Guarantor, and, after giving effect to the
Incurrence of such Debt and the application of the proceeds thereof, Consolidated
Interest Coverage Ratio of Arch Coal would be at least 2.0 to 1.0, or

          (2) such Debt is Permitted Debt.

The term “Permitted Debt” is defined to include the following:

       (a) Debt under Credit Facilities (including, without limitation, the Incurrence of
Guarantees thereof) in an aggregate amount at any one time outstanding pursuant to this
clause (a) not to exceed the greater of (i) $800.0 million, less the aggregate amount of all
Net Available Cash from Asset Sales applied by Arch Coal or any Restricted Subsidiary to Repay
any such Debt pursuant to Section 4.09 of the Indenture and (ii) 20% of Consolidated Net
Tangible Assets;

       (b) Debt of Arch Coal evidenced by the Notes issued on the Issue Date and the Note
Guarantees thereof and any Notes issued pursuant to the Registration Rights Agreement in
exchange for the Notes and any Note Guarantees related thereto;

       (c) Debt of Arch Western evidenced by the Arch Western Notes in an aggregate principal
amount not to exceed $950.0 million and the Guarantees thereof by Arch Western and its
Subsidiaries;

       (d) Debt of Arch Coal or a Restricted Subsidiary in respect of Capital Lease Obligations
and Purchase Money Debt; provided that the aggregate principal amount of all Debt Incurred and
then outstanding pursuant to this clause (d) (together with all Permitted Refinancing Debt
Incurred and then outstanding in respect of Debt previously Incurred pursuant to this
clause (d)) does not exceed, at any one time outstanding, 7% of Consolidated Net Tangible
Assets;

       (e) Debt of Arch Coal owing to and held by any Restricted Subsidiary and Debt of a
Restricted Subsidiary owing to and held by Arch Coal or any Restricted Subsidiary; provided,
however, that any subsequent issue or transfer of Capital Stock that results in any such
Restricted Subsidiary ceasing to be a Restricted Subsidiary or any subsequent transfer of any
such Debt (except the Arch Coal Notes, to Arch Coal or a Restricted Subsidiary or any pledge
of such Debt constituting a Permitted Lien) shall be deemed, in each case, to constitute the
Incurrence of such Debt by the issuer thereof;

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       (f) Debt under Interest Rate Agreements entered into by Arch Coal or a Restricted
Subsidiary in the ordinary course of business;

       (g) Debt under Currency Exchange Protection Agreements entered into by Arch Coal or a
Restricted Subsidiary in the ordinary course of business;

       (h) Debt under Commodity Price Protection Agreements entered into by Arch Coal or a
Restricted Subsidiary in the ordinary course of business;

       (i) Debt in connection with one or more standby letters of credit, performance bonds, bid
bonds, appeal bonds, bankers acceptances, insurance obligations, surety bonds, completion
guarantees or other similar bonds and obligations, including self-bonding arrangements, issued
by Arch Coal or a Restricted Subsidiary in the ordinary course of business or pursuant to
self-insurance obligations and not in connection with the borrowing of money or the obtaining
of advances;

       (j) Debt of Arch Coal or any Restricted Subsidiary under one or more unsecured commercial
paper facilities in an aggregate amount pursuant to this clause (j) (including all Permitted
Refinancing Debt Incurred and then outstanding in respect of Debt previously Incurred pursuant
to this clause (j)) not to exceed $100.0 million at any one time outstanding;

       (k) Debt of Arch Coal or a Restricted Subsidiary outstanding on the Issue Date not
otherwise described in clauses (a) through (j) above or (l) through (s) below;

       (l) other Debt of Arch Coal or any Restricted Subsidiary in an aggregate principal amount
outstanding at any one time not to exceed $175.0 million;

       (m) Permitted Refinancing Debt Incurred in respect of Debt Incurred pursuant to
clause (1) of the first paragraph of this covenant and clauses (b), (c), (d), (j), (k), and
this clause (m);

       (n) Debt consisting of installment payment obligations to any federal or state
governmental agency in connection with the acquisition of coal leases or oil, gas or other
real property interests in the ordinary course of business;

       (o) Debt Incurred by Arch Coal or any of its Restricted Subsidiaries arising from
agreements providing for indemnification, adjustment of purchase price or similar obligations,
or guarantees or letters of credit, surety bonds or performance bonds securing any obligations
of Arch Coal or any of its Restricted Subsidiaries pursuant to such agreements, in any case
Incurred in connection with the disposition of any business, assets or Capital Stock of a
Restricted Subsidiary (other than Guarantees of Debt Incurred by any Person acquiring all or
any portion of such business, assets or Capital Stock of a Restricted Subsidiary for the
purpose of financing such acquisition), so long as the amount does not exceed the gross
proceeds actually received by Arch Coal or any Restricted Subsidiary thereof in connection
with such disposition;

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       (p) Debt Incurred by Arch Coal or any of its Restricted Subsidiaries arising from the
honoring by a bank or other financial institution of a check, draft or similar instrument
drawn against insufficient funds in the ordinary course of business, provided, however, that
such Debt is extinguished within five business days of its Incurrence;

       (q) Debt Incurred by Arch Coal to the extent that the net proceeds thereof are promptly
deposited to defease or to satisfy and discharge the Notes;

       (r) Debt of a Receivables Subsidiary in respect of a Receivables Facility, which is
non-recourse to Arch Coal or any other Restricted Subsidiary in any way other than Standard
Securitization Undertakings;

       (s) Debt of Persons that are acquired by Arch Coal or any of its Restricted Subsidiaries
or merged into a Restricted Subsidiary in accordance with the terms of the Indenture;
provided, however, that such Debt is not Incurred in contemplation of such acquisition or
merger or to provide all or a portion of the funds or credit support required to consummate
such acquisition or merger; provided further, that, after giving effect to such acquisition
and the Incurrence of such Debt, Arch Coal would be permitted to Incur at least $1.00 of
additional Debt pursuant to clause (1) of the first paragraph of this Section 4.06.

         Notwithstanding anything to the contrary contained in this Section 4.06, accrual of interest,
accretion or amortization of original issue discount and the payment of interest or dividends in
the form of additional Debt, will be deemed not to be an Incurrence of Debt for purposes of this
covenant.

         For purposes of determining compliance with this Section 4.06 in the event that an item of
Debt meets the criteria of more than one of the categories of Permitted Debt described in clauses
(a) through (s) above or is entitled to be incurred pursuant to clause (1) of the first paragraph
of this Section 4.06, Arch Coal shall, in its sole discretion classify, and may later reclassify,
such item of Debt in any manner that complies with this Section 4.06. Notwithstanding the
foregoing, Debt under the Credit Agreement outstanding on the Issue Date will be deemed to have
been Incurred on such date in reliance on the exception provided by clause (a) of the definition of
Permitted Debt and Debt under Arch Western’s existing commercial paper facility outstanding on the
Closing Date will be deemed to have been Incurred on such date in reliance on the exception
provided by clause (j) of the definition of Permitted Debt.

               SECTION 4.07. Limitation on Liens.  

         Arch Coal shall not, and shall not permit any Restricted Subsidiary to, directly or
indirectly, Incur or suffer to exist, any Lien (other than Permitted Liens) upon any of its
Property (including Capital Stock of a Restricted Subsidiary), whether owned at the Issue Date or
thereafter acquired, or any interest therein or any income or profits therefrom, unless it has made
or will make effective provision whereby the Notes or any Note Guarantee will be secured by such
Lien equally and ratably with all other Debt of Arch Coal or any Restricted Subsidiary secured by
such Lien for so long as such other Debt is secured by such Lien; provided, however, that if such
Debt is expressly subordinated to the Notes or any Note Guarantee, the Lien securing

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such Debt will be subordinated and junior to the Lien securing the Notes or such Note
Guarantee, as the case may be, with the same relative priority as such Debt has with respect to the
Notes or such Note Guarantee.

               SECTION 4.08. Limitation on Restricted Payments. Arch Coal shall not make, and shall
not permit any Restricted Subsidiary to make, directly or indirectly, any Restricted Payment if at
the time of, and after giving effect to, such proposed Restricted Payment,

     (a) a Default or Event of Default shall have occurred and be continuing;

     (b) Arch Coal could not Incur at least $1.00 of additional Debt pursuant to clause (1) of
the first paragraph of Section 4.06 of this Indenture; or

     (c) the aggregate amount of such Restricted Payment and all other Restricted Payments
declared or made since the Issue Date (the amount of any Restricted Payment, if made other
than in cash, to be based upon Fair Market Value at the time of such Restricted Payment) would
exceed an amount equal to the sum of:

          (1) 50% of the aggregate amount of Consolidated Net Income of Arch Coal accrued
during the period (treated as one accounting period) from the beginning of the fiscal
quarter during which the Issue Date occurs to the end of the most recent fiscal quarter
for which internal financial statements are available at the time of such Restricted
Payment (or if the aggregate amount of Consolidated Net Income of Arch Coal for such
period shall be a deficit, minus 100% of such deficit), plus

          (2) 100% of the Capital Stock Sale Proceeds, plus

          (3) the sum of:

	 	(A)	 	the aggregate net cash proceeds received by
Arch Coal or any Restricted Subsidiary from the issuance or sale after
the Issue Date of convertible or exchangeable Debt that has been
converted into or exchanged for Capital Stock (other than Disqualified
Stock) of Arch Coal, and
	 
	 	(B)	 	the aggregate net cash proceeds received by
Arch Coal from the issuance and sale after the Issue Date of Debt of
Arch Coal or any Restricted Subsidiary that has been converted or
exchanged for Capital Stock (other than Disqualified Stock) of Arch
Coal,

excluding, in the case of clause (A) or (B):

     (x) any such Debt issued or sold to Arch Coal or a Subsidiary of Arch Coal or
an employee stock ownership plan or trust established by Arch Coal or any such
Subsidiary for the benefit of their employees, and

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     (y) the aggregate amount of any cash or other Property distributed by Arch Coal
or any Restricted Subsidiary upon any such conversion or exchange,

     plus

     (4) an amount equal to the sum of:

	 	(A)	 	the net reduction in Investments in any Person
other than Arch Coal or a Restricted Subsidiary resulting from
dividends, repayments of loans or advances or other transfers of
Property, in each case to Arch Coal or any Restricted Subsidiary from
such Person, and
	 
	 	(B)	 	the portion (proportionate to Arch Coal’s
equity interest in such Unrestricted Subsidiary) of the Fair Market
Value of the net assets of an Unrestricted Subsidiary of Arch Coal at
the time such Unrestricted Subsidiary is designated a Restricted
Subsidiary;

provided, however, that the foregoing sum shall not exceed, in the case of any Person, the
amount of Investments previously made (and treated as a Restricted Payment) by Arch Coal or
any Restricted Subsidiary in such Person.

Notwithstanding the foregoing limitation, Arch Coal may:

       (a) pay dividends on its Capital Stock within 60 days of the declaration thereof if, on
the declaration date, such dividends could have been paid in compliance with the Indenture;
provided, however, that such dividend shall be included in the calculation of the amount of
Restricted Payments;

       (b) make Restricted Payments in exchange for, or out of the proceeds of the substantially
concurrent sale of, Capital Stock of Arch Coal (other than Disqualified Stock and other than
Capital Stock issued or sold to a Subsidiary of Arch Coal or an employee stock ownership plan
or trust established by Arch Coal or any such Subsidiary for the benefit of their employees);
provided, however; that

     (1) such purchase, repurchase, redemption, legal defeasance, acquisition or
retirement shall be excluded in the calculation of the amount of Restricted Payments and

     (2) the Capital Stock Sale Proceeds from such exchange or sale shall be excluded
from the calculation pursuant to clause (c) above;

       (c) purchase, repurchase, redeem, legally defease, acquire or retire for value any
Subordinated Obligations in exchange for, or out of the proceeds of the substantially
concurrent sale of, Permitted Refinancing Debt; provided, however, that such purchase,
repurchase, redemption, legal defeasance, acquisition or retirement shall be excluded in the
calculation of the amount of Restricted Payments;

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     (d) repurchase shares of, or options to purchase shares of, common stock of Arch Coal or
any of its Subsidiaries from current or former Officers, directors or employees of Arch Coal
or any of its Subsidiaries (or permitted transferees of such current or former Officers,
directors or employees), pursuant to the terms of agreements (including employment agreements)
or plans (or amendments thereto) approved by the Board of Directors under which such
individuals purchase or sell, or are granted the option to purchase or sell, shares of such
common stock; provided, however, that: (1) the aggregate amount of such repurchases shall not
exceed $5.0 million in any calendar year (with unused amounts in any calendar year being
carried over to succeeding years subject to a maximum of $10.0 million in any calendar year)
and (2) at the time of such repurchase, no other Default or Event of Default shall have
occurred and be continuing (or result therefrom); provided further, however, that such
repurchases shall be included in the calculation of the amount of Restricted Payments;

     (e) so long as no Default or Event of Default has occurred and is continuing and Arch
Western is a limited liability company, make distributions to the ARCO Member (as defined in
the LLC Agreement), with respect to any period after June 30, 2009, not to exceed the Tax
Amount allocated to such member under the LLC Agreement for such period; provided, however,
that such distributions shall be excluded in the calculation of the amount of Restricted
Payments;

     (f) so long as no Default or Event of Default has occurred and is continuing, make
distributions of the Preferred Return (as defined in the LLC Agreement) to the ARCO Member (as
defined in the LLC Agreement) pursuant to the LLC Agreement in effect on the Issue Date;
provided, however, that such distribution pursuant to this clause (f) shall not exceed
$100,000 per year and shall be excluded in the calculation of the amount of Restricted
Payments;

     (g) pay cash in lieu of fractional Capital Stock pursuant to the exchange or conversion
of any exchangeable or convertible securities; provided, however, that such payment shall not
be for the purpose of evading the limitation of this covenant (as determined by the Board of
Director in good faith); provided further, however, that such payments will be included in the
calculation of the amount of Restricted Payments;

     (h) repurchase of Capital Stock deemed to occur upon the exercise of options, warrants or
other securities convertible into or exchangeable for Capital Stock of Arch Coal to the extent
that such Capital Stock represents all or a portion of the exercise price thereof; provided,
however, that such repurchase will be excluded in the calculation of the amount of Restricted
Payments;

     (i) declare and pay dividends to holders of any class or series of Disqualified Stock of
Arch Coal or any Restricted Subsidiary, or Preferred Stock of a Restricted Subsidiary, in each
case issued in accordance with the covenant described in Section 4.06 of this Indenture;
provided, however, that 50% of such dividends shall be included in the calculation of the
amount of Restricted Payments;

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     (j) declare and pay dividends on Arch Coal’s common stock not to exceed an annual rate of
$0.36 per share (such amount to be appropriately adjusted to reflect any stock split, reverse
stock split, stock dividend or similar transaction occurring after the Issue Date so that the
aggregate amount of dividends permitted after such transaction is the same as the amount
permitted immediately prior to such transaction); provided however, that that such dividends
shall be excluded in the calculation of the amount of Restricted Payments; and

     (k) so long as no Default or Event of Default has occurred and is continuing, other
Restricted Payments in an aggregate amount not to exceed $25.0 million; provided, however,
that such Restricted Payments shall be excluded in the calculation of the amount of Restricted
Payments.

       For purposes of determining compliance with this Section 4.08, if a Restricted Payment meets
the criteria of more than one of the types of Restricted Payments described in clauses (a) through
(k) above, Arch Coal may, in its sole discretion, classify such Restricted Payment in any manner
that complies with this covenant.

               SECTION 4.09. Limitation on Asset Sales. Arch Coal shall not, and shall not permit
any Restricted Subsidiary to, directly or indirectly, consummate any Asset Sale unless:

     (a) Arch Coal or such Restricted Subsidiary receives consideration at the time of such
Asset Sale at least equal to the Fair Market Value of the Property subject to such Asset Sale;

     (b) at least 75% of the consideration paid to Arch Coal or such Restricted Subsidiary in
connection with such Asset Sale is in the form of cash, Cash Equivalents or Additional Assets
or a combination thereof. For purposes of this provision, each of the following will be
deemed to be cash:

     (1) any liabilities of Arch Coal or any Restricted Subsidiary (other than contingent
liabilities, liabilities that are by their terms subordinated to the Notes or the Note
Guarantees or liabilities to the extent owed to Arch Coal or any Subsidiary of Arch Coal)
that are assumed by the transferee of any Property or Capital Stock, as applicable, to
the extent that Arch Coal and the Restricted Subsidiaries are no longer obligated with
respect to such liabilities; and

     (2) any securities, notes or other obligations received by Arch Coal or any such
Restricted Subsidiary from such transferee that are converted by Arch Coal or such
Restricted Subsidiary into cash within 180 days of receipt (to the extent of the cash
received in that conversion).

      The Net Available Cash (or any portion thereof) from Asset Sales may be applied by Arch Coal
or a Restricted Subsidiary to the extent Arch Coal or such Restricted Subsidiary elects (or is
required by the terms of any Debt) to:

55

 

     (a) repay any secured Debt of the Company or a Restricted Subsidiary (other than
Subordinated Obligations), any Debt of a Restricted Subsidiary that is not a Guarantor (other
than Debt owed to Arch Coal or another Restricted Subsidiary) or any Debt under the Credit
Agreement; or

     (b) make a capital expenditure or reinvest in Additional Assets (including by means of an
Investment in Additional Assets by a Restricted Subsidiary with Net Available Cash received by
Arch Coal or another Restricted Subsidiary).

       Any Net Available Cash from an Asset Sale (other than an Asset Sale consisting of all of the
Capital Stock of Canyon Fuel or Mountain Coal Company, L.L.C.) not applied in accordance with the
preceding paragraph within 365 days from the date of the receipt of such Net Available Cash
(provided that such 365 day period shall be extended with respect to Net Available Cash received by
Arch Western or its Restricted Subsidiaries until the consummation of any asset sale prepayment
offer required to be made pursuant to the Arch Western Notes Indenture or any agreement governing
Permitted Refinancing Debt in respect thereof) or that is not segregated from the general funds of
Arch Coal for investment in identified Additional Assets in respect of a project that shall have
been commenced, and for which binding contractual commitments have been entered into, prior to the
end of such 365-day period and that shall not have been completed or abandoned shall constitute
“Excess Proceeds;” provided, however, that the amount of any Net Available Cash that ceases to be
so segregated as contemplated above and any Net Available Cash that is segregated in respect of a
project that is abandoned or completed shall also constitute “Excess Proceeds” at the time any such
Net Available Cash ceases to be so segregated or at the time the relevant project is so abandoned
or completed, as applicable; provided further, however, that the amount of any Net Available Cash
that continues to be segregated for investment and that is not actually reinvested within
twenty-four months from the date of the receipt of such Net Available Cash shall also constitute
“Excess Proceeds.” Any Net Available Cash from an Asset Sale consisting of all of the Capital
Stock of Canyon Fuel Company, LLC or Mountain Coal Company, L.L.C. not applied in accordance with
the preceding paragraph within 365 days from the date of the receipt of such Net Available Cash
shall be segregated from the general funds of Arch Coal and invested in cash or Cash Equivalents
pending application in accordance with the preceding paragraph. Subject to the foregoing, Arch
Coal or such Restricted Subsidiary may apply the Net Available Cash to temporarily reduce Debt
outstanding under a revolving credit facility or otherwise invest such Net Available Cash in any
manner not prohibited by the Indenture pending the final application of the Net Available Cash
pursuant to this covenant.

       When the aggregate amount of Excess Proceeds (including income earned on such Excess Proceeds)
exceeds $50.0 million (or earlier at Arch Coal’s option, in which case Excess Proceeds shall be
deemed to include any Net Available Cash Arch Coal elects to include in such repurchase offer),
Arch Coal will be required to make an offer to repurchase (the “Prepayment Offer”) the
Notes, which offer shall be in the amount of the Allocable Excess Proceeds (rounded to the nearest
$1,000), on a pro rata basis according to principal amount, at a purchase price equal to 100% of
the principal amount thereof, plus accrued and unpaid interest to the repurchase date (subject to
the right of Holders of record on the relevant Record Date to receive interest due on the relevant
interest payment date), in accordance with the procedures (including prorating in the event of
oversubscription) set forth in the Indenture. To the extent that any portion of the amount of Net
Available Cash remains after compliance with the preceding sentence and

56

 

provided that all Holders of Notes have been given the opportunity to tender their Notes for
repurchase in accordance with the Indenture, Arch Coal or such Restricted Subsidiary may use such
remaining amount for any purpose permitted by the Indenture, and the amount of Excess Proceeds will
be reset to zero.

       The term “Allocable Excess Proceeds” shall mean the product of:

     (a) the Excess Proceeds and

     (b) a fraction,

     (1) the numerator of which is the aggregate principal amount of the Notes
outstanding on the date of the Prepayment Offer, and

     (2) the denominator of which is the sum of the aggregate principal amount of the
Notes outstanding on the date of the Prepayment Offer and the aggregate principal amount
of other Debt of Arch Coal outstanding on the date of the Prepayment Offer that is pari
passu in right of payment with the Notes and subject to terms and conditions in respect
of Asset Sales similar in all material respects to this covenant and requiring Arch Coal
to make an offer to repurchase such Debt at substantially the same time as the Prepayment
Offer.

       Within five business days after Arch Coal is obligated to make a Prepayment Offer as described
in the preceding paragraph, Arch Coal shall send a written notice, by first-class mail, to the
Holders of Notes, accompanied by such information regarding Arch Coal and its Subsidiaries as Arch
Coal in good faith believes will enable such Holders to make an informed decision with respect to
such Prepayment Offer. Such notice shall state, among other things, the purchase price and the
repurchase date, which shall be, subject to any contrary requirements of applicable law, a business
day no earlier than 30 days nor later than 60 days from the date such notice is mailed.

       Arch Coal will comply, to the extent applicable, with the requirements of Section 14(e) of the
Exchange Act and any other securities laws or regulations in connection with the repurchase of
Notes pursuant to this covenant. To the extent that the provisions of any securities laws or
regulations conflict with provisions of this covenant, Arch Coal will comply with the applicable
securities laws and regulations and will not be deemed to have breached its obligations under this
covenant by virtue thereof.

               SECTION 4.10. Limitation on Transactions with Affiliates. Arch Coal shall not, and
shall not permit any Restricted Subsidiary to, directly or indirectly, enter into or suffer to
exist any transaction or series of transactions (including the purchase, sale, transfer,
assignment, lease, conveyance or exchange of any Property or the rendering of any service) with, or
for the benefit of, any Affiliate of Arch Coal (an “Affiliate Transaction”), unless:

     (a) the terms of such Affiliate Transaction are not materially less favorable to Arch
Coal or such Restricted Subsidiary, as the case may be, than those that could be obtained in a
comparable arm’s-length transaction with a Person that is not an Affiliate of Arch Coal;

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     (b) if such Affiliate Transaction involves aggregate payments or value in excess of $25.0
million, the Board of Directors (including at least a majority of the disinterested members of
the Board of Directors) approves such Affiliate Transaction and, in its good faith judgment,
believes that such Affiliate Transaction complies with clauses (a) of this paragraph as
evidenced by a Board Resolution promptly delivered to the Trustee; provided, however, if there
are no disinterested members of the Board of Directors, Arch Coal shall receive a written
opinion from an Independent Financial Advisor described in clause (c) below; and

     (c) if such Affiliate Transaction involves aggregate payments or value in excess of
$100.0 million, Arch Coal obtains a written opinion from an Independent Financial Advisor to
the effect that the consideration to be paid or received in connection with such Affiliate
Transaction is fair, from a financial point of view, to Arch Coal or such Restricted
Subsidiary or that such Affiliate Transaction is not materially less favorable to Arch Coal or
such Restricted Subsidiary, as the case may be, than those that could be obtained in a
comparable arm’s length transaction with a Person that is not an Affiliate of Arch Coal.

       Notwithstanding the foregoing limitation, Arch Coal or any Restricted Subsidiary may enter
into or suffer to exist the following:

     (a) any transaction or series of transactions between Arch Coal and one or more
Restricted Subsidiaries, or among Restricted Subsidiaries;

     (b) any Restricted Payment permitted to be made pursuant to the first paragraph of the
covenant described under Section 4.08 of this Indenture or Permitted Investments (other than
pursuant to clause (b), (c), (j) or (k) of such definition);

     (c) the payment of compensation (including amounts paid pursuant to employment and
related agreements and employee benefit plans) for the personal services of officers,
directors and employees of Arch Coal or any of its Restricted Subsidiaries;

     (d) loans and advances to employees made in the ordinary course of business permitted by
law and consistent with the past practices of Arch Coal or such Restricted Subsidiary;

     (e) indemnities of Officers, directors and employees of the Company or any Restricted
Subsidiary consistent with applicable charter, bylaw or statutory provisions;

     (f) agreements in effect on the Issue Date and any modifications, extensions or renewals
thereto that are not materially less favorable to Arch Coal or any Restricted Subsidiary than
such agreements as in effect on the Issue Date;

     (g) pledges of Capital Stock of Unrestricted Subsidiaries for the benefit of lenders to
such Unrestricted Subsidiaries; and

     (h) any transaction with a Receivables Subsidiary as part of a Receivables Facility and
otherwise in compliance with the Indenture that are fair to Arch Coal or its Restricted
Subsidiaries or not less favorable to Arch Coal or its Restricted Subsidiaries than those that

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might be obtained at the time with Persons that are not Affiliates of Arch Coal (as
determined in good faith by the Board of Directors).

               SECTION 4.11. Change of Control. Upon the occurrence of a Change of Control, each
holder of Notes shall have the right to require Arch Coal to repurchase all or any part of such
holder’s Notes pursuant to the offer described below (the “Change of Control Offer”) at a
purchase price (the “Change of Control Purchase Price”) equal to 101% of the principal
amount thereof, plus accrued and unpaid interest to the repurchase date (subject to the right of
Holders of record on the relevant Record Date to receive interest due on the relevant interest
payment date). If the repurchase date is after a Record Date and on or before the relevant
interest payment date, the accrued and unpaid interest, if any, will be paid to the person or
entity in whose name the Note is registered at the close of business on that Record Date, and no
additional interest will be payable to Holders whose Notes shall be subject to redemption.

        Within 30 days following any Change of Control, Arch Coal shall:

          (a) cause a notice of the Change of Control Offer to be sent at least once to the Dow
Jones News Service or similar business news service in the United States; and

          (b) send, by first-class mail, with a copy to the Trustee, to each Holder of Notes, at
such Holder’s address appearing in the Security Register, a notice stating:

          (1) that a Change of Control has occurred and a Change of Control Offer is being
made pursuant to this Section 4.11 of the Indenture and that all Notes timely tendered
will be accepted for payment;

          (2) the Change of Control Purchase Price and the repurchase date, which shall be,
subject to any contrary requirements of applicable law, a business day no earlier than 30
days nor later than 60 days from the date such notice is mailed;

          (3) the circumstances and relevant facts regarding the Change of Control (including
information with respect to pro forma historical income, cash flow and capitalization
after giving effect to the Change of Control); and

          (4) the procedures that Holders of Notes must follow in order to tender their Notes
(or portions thereof) for payment, and the procedures that Holders of Notes must follow
in order to withdraw an election to tender Notes (or portions thereof) for payment.

        Arch Coal will not be required to make a Change of Control Offer following a Change of Control
if a third party makes the Change of Control Offer in the manner, at the times and otherwise in
compliance with the requirements set forth in this Indenture applicable to a Change of Control
Offer made by Arch Coal and purchases all Notes validly tendered and not withdrawn under such
Change of Control Offer.

        Arch Coal will comply, to the extent applicable, with the requirements of Section 14(e) of the
Exchange Act and any other securities laws or regulations in connection with the repurchase of
Notes pursuant to a Change of Control Offer. To the extent that the provisions of any

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securities laws or regulations conflict with the provisions of this covenant, Arch Coal will
comply with the applicable securities laws and regulations and will not be deemed to have breached
its obligations under this covenant by virtue of such compliance.

               SECTION 4.12. Limitation on Sale and Leaseback Transactions. Arch Coal shall not, and
shall not permit any of its Restricted Subsidiaries to, enter into any Sale and Leaseback
Transaction with respect to any Property unless:

       (a) Arch Coal or such Restricted Subsidiary would be entitled to:

        (i) Incur Debt in an amount equal to the Attributable Debt with respect to such Sale
and Leaseback Transaction pursuant to Section 4.06 of this Indenture, and

        (ii) create a Lien on such Property securing such Attributable Debt without also
securing the Notes or the applicable Note Guarantee pursuant to Section 4.07 of this
Indenture, and

       (b) such Sale and Leaseback Transaction is effected in compliance with Section 4.09 of
this Indenture.

               SECTION 4.13. Guarantees by Restricted Subsidiaries. If Arch Coal acquires or creates
another Domestic Subsidiary after the Issue Date, then that newly acquired or created Subsidiary
will become a Guarantor and execute a supplemental indenture within 10 days of the date on which it
was created or acquired or became a Subsidiary; provided, however, that all Subsidiaries that have
been properly designated as Unrestricted Subsidiaries in accordance with this Indenture for so
long as they continue to constitute Unrestricted Subsidiaries will not have to become a Guarantor
pursuant to this Section 4.13. In addition, Arch Coal shall not permit any Restricted Subsidiary
that is not a Guarantor, directly or indirectly, to Guarantee or secure the payment of any other
Debt of Arch Coal or any other Guarantor unless such Restricted Subsidiary simultaneously executes
and delivers a supplemental indenture to the Indenture providing for a Note Guarantee of the
payment of the Notes by such Restricted Subsidiary; provided that this paragraph shall not be
applicable to:

        (i) any Guarantee of any Restricted Subsidiary that existed at the time such Person
became a Restricted Subsidiary and was not incurred in connection with, or in contemplation
of, such Person becoming a Restricted Subsidiary;

        (ii) any Guarantee arising under or in connection with performance bonds, indemnity
bonds, surety bonds or letters of credit or bankers’ acceptances or coal sales contracts; or

        (iii) Permitted Liens.

        If the Guaranteed Debt is a Subordinated Obligation, the Guarantee of such Guaranteed Debt
must be subordinated in right of payment to the Note Guarantee to at least the extent that the
Guaranteed Debt is subordinated to the Notes or the applicable Note Guarantee.

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               SECTION 4.14. Limitation on Restrictions on Distributions from Restricted
Subsidiaries. Arch Coal shall not, and shall not permit any Restricted Subsidiary to, directly
or indirectly, create or otherwise cause or suffer to exist any consensual restriction on the right
of any Restricted Subsidiary to:

     (a) pay dividends, in cash or otherwise, or make any other distributions on or in respect
of its Capital Stock, or pay any Debt or other obligation owed, to Arch Coal or any other
Restricted Subsidiary;

     (b) make any loans or advances to Arch Coal or any other Restricted Subsidiary; or

     (c) transfer any of its Property to Arch Coal or any other Restricted Subsidiary.

     (d) The foregoing limitations will not apply:

          (1) with respect to clauses (a), (b) and (c), to restrictions:

	 	(A)	 	in effect on the Issue Date (including, without
limitation, restrictions pursuant to the Arch Western Notes and the
Arch Western Notes Indenture, the LLC Agreement, the Credit Agreement,
the Notes and the Indenture);
	 
	 	(B)	 	relating to Debt of a Restricted Subsidiary of
Arch Coal and existing at the time it became a Restricted Subsidiary if
such restriction was not created in connection with or in anticipation
of the transaction or series of transactions pursuant to which such
Restricted Subsidiary became a Restricted Subsidiary or was acquired by
Arch Coal;
	 
	 	(C)	 	that result from any amendment, restatement,
renewal or replacement of an agreement referred to in clause (1)(A) or
(B) above or in clause (2)(A) or (B) below, provided such restrictions
are not materially more restrictive, taken as a whole, than those under
the agreement evidencing the Debt so Refinanced;
	 
	 	(D)	 	existing under, or by reason of or with respect
to applicable law, rule, regulation or order of any governmental
authority;
	 
	 	(E)	 	on cash or other deposits or net worth imposed
by customers or required by insurance surety or bonding companies, in
each case, under contracts entered into in the ordinary course of
business;
	 
	 	(F)	 	relating to Debt of a Receivables Subsidiary or
other contractual requirements of a Receivables Subsidiary in
connection with a Receivables Facility; provided that such restrictions
only apply to such Receivables Subsidiary or the receivables which are
subject to the Receivables Facility;

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	 	(G)	 	with respect to any Person or the Property of a
Person acquired by Arch Coal or any of its Restricted Subsidiaries
existing at the time of such acquisition and not incurred in connection
with or in anticipation of such acquisition, which restriction is not
applicable to any Person or the Property of any Person, other than the
Person, or the Property of the Person, so acquired and any amendments,
modifications, restatements, renewals, extensions, supplements,
refundings, replacements or refinancings thereof, provided that the
restrictions in any such amendments, modifications, restatements,
renewals, extensions, supplements, refundings, replacements or
refinancings are not materially more restrictive, taken as a whole,
than those in effect on the date of the acquisition;
	 
	 	(H)	 	contained in customary provisions in asset sale
agreements limiting the transfer of such Property or distributions or
loans from the Property to be sold pending the closing of such sale;
	 
	 	(I)	 	contained in customary provisions in
partnership agreements, limited liability company organizational
governance documents, joint venture agreements and other similar
agreements that restrict the transfer of ownership interest in, or
assets of, such partnership, limited liability company, joint venture
or similar Person; and
	 
	 	(J)	 	contained in agreements or instruments
governing the Debt of a Restricted Subsidiary; provided that such
restrictions contained in any agreement or instrument will not
materially affect the Arch Coal’s ability to make anticipated principal
or interest payments on the Notes (as determined in good faith by the
Board of Directors or the senior management of Arch Coal); and

          (2) with respect to clause (c) only, to restrictions:

	 	(A)	 	relating to Debt that is permitted to be
Incurred and secured without also securing the Notes pursuant to
Section 4.06 and 4.07 of this Indenture that limit the right of the
debtor to dispose of the Property securing such Debt;
	 
	 	(B)	 	resulting from customary provisions restricting
subletting, assignment or transfer of any property or asset that is
subject to a lease, license, sub-license or similar contract or
customary provisions in other agreements that restrict assignment or
transfer of such agreements or rights thereunder; or
	 
	 	(C)	 	customary restrictions contained in asset sale
agreements limiting the transfer of such Property pending the closing
of such sale.

               SECTION 4.15. Designation of Restricted and Unrestricted Subsidiaries. The Board of
Directors may designate any Restricted Subsidiary to be an Unrestricted Subsidiary

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if that designation (which would constitute an Investment in such Subsidiary) would not result
in a breach of Section 4.08 of this Indenture or otherwise cause a Default. If a Restricted
Subsidiary is designated as an Unrestricted Subsidiary, the aggregate Fair Market Value of all
outstanding Investments owned by Arch Coal and its Restricted Subsidiaries in the Subsidiary
properly designated will be deemed to be an Investment made as of the time of the designation as
set forth under the definition of “Investment” and will reduce the amount available for Restricted
Payments under the first paragraph of Section 4.08 of this Indenture or Permitted Investments, as
determined by Arch Coal. That designation will only be permitted if the Investment would be
permitted at that time and if the Restricted Subsidiary otherwise meets the definition of an
Unrestricted Subsidiary.

       The Board of Directors may also designate any Subsidiary of Arch Coal to be an Unrestricted
Subsidiary if:

       (a) the Subsidiary to be so designated does not own any Capital Stock or Debt of, or own
or hold any Lien on any Property of, Arch Coal or any other Restricted Subsidiary and is not
required to be a Guarantor pursuant to the Indenture; and

       (b) either:

     (1) the Subsidiary to be so designated has total assets of $1,000,000 or less; or

     (2) such designation is effective immediately upon such entity becoming a Subsidiary
of Arch Coal.

       Unless so designated as an Unrestricted Subsidiary, any Person that becomes a Subsidiary of
Arch Coal will be classified as a Restricted Subsidiary; provided, however, that such Subsidiary
shall not be designated a Restricted Subsidiary and shall be automatically classified as an
Unrestricted Subsidiary if either of the requirements set forth in clauses (x) and (y) of the
second immediately following paragraph will not be satisfied after giving pro forma effect to such
classification or if such Person is a Subsidiary of an Unrestricted Subsidiary.

       In addition, neither Arch Coal nor any of its Restricted Subsidiaries shall at any time be
directly or indirectly liable for any Debt that provides that the holder thereof may (with the
passage of time or notice or both) declare a default thereon or cause the payment thereof to be
accelerated or payable prior to its Stated Maturity upon the occurrence of a default with respect
to any Debt, Lien or other obligation of any Unrestricted Subsidiary (including any right to take
enforcement action against such Unrestricted Subsidiary) except for a pledge of the Capital Stock
of any Unrestricted Subsidiary for the benefit of such holders.

       The Board of Directors may designate any Unrestricted Subsidiary to be a Restricted Subsidiary
if, immediately after giving pro forma effect to such designation,

(x) Arch Coal could Incur at least $1.00 of additional Debt pursuant to clause (1)
of the first paragraph of Section 4.06 of this Indenture and

(y) no Default or Event of Default shall have occurred and be continuing or would
result therefrom.

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       Any such designation or redesignation by the Board of Directors will be evidenced by filing
with the Trustee a Board Resolution giving effect to such designation or redesignation and an
Officers’ Certificate that:

     (a) certifies that such designation or redesignation complies with the foregoing
provisions; and

     (b) gives the effective date of such designation or redesignation,

such filing with the Trustee to occur within 45 days after the end of the fiscal quarter of Arch
Coal in which such designation or redesignation is made (or, in the case of a designation or
redesignation made during the last fiscal quarter of Arch Coal’s fiscal year, within 90 days after
the end of such fiscal year).

               SECTION 4.16. Payment of Taxes and Other Claims. Arch Coal will pay or discharge and
shall cause each of the Subsidiaries to pay or discharge, or cause to be paid or discharged, before
the same shall become delinquent (a) all material taxes, assessments and governmental charges
levied or imposed upon (i) Arch Coal or any such Subsidiary, (ii) the income or profits of any such
Subsidiary which is a corporation or (iii) the property of Arch Coal or any such Subsidiary and
(b) all material lawful claims for labor, materials and supplies that, if unpaid, might by law
become a Lien upon the property of Arch Coal or any such Subsidiary; provided, however, that Arch
Coal shall not be required to pay or discharge, or cause to be paid or discharged, any such tax,
assessment, charge or claim the amount, applicability or validity of which is being contested in
good faith by appropriate proceedings and for which adequate reserves have been established.

               SECTION 4.17. Reports to Holders. Notwithstanding that Arch Coal may not be subject
to the reporting requirements of Section 13 or 15(d) of the Exchange Act, Arch Coal shall file with
the Commission and provide the Trustee and Holders of Notes with such annual reports and such
information, documents and other reports as are specified in Sections 13 and 15(d) of the Exchange
Act and applicable to a U.S. corporation subject to such Sections, such information, documents and
reports to be so filed with the Commission and provided at the times specified for the filing of
such information, documents and reports under such Sections; provided, however, that Arch Coal
shall not be so obligated to file such information, documents and reports with the Commission if
the Commission does not permit such filings; provided further, however, that Arch Coal will be
required to provide to the Trustee and the Holders of Notes any such information, documents or
reports that are not are so filed.

               SECTION 4.18. Legal Existence. Subject to Article Five, Arch Coal shall do or cause
to be done all things necessary to preserve and keep in full force and effect its corporate
existence, and the corporate, partnership or other existence of each Restricted Subsidiary, in
accordance with the respective organizational documents (as the same may be amended from time to
time) of each Restricted Subsidiary and the material rights (charter and statutory) and franchises
of Arch Coal and the Restricted Subsidiaries; provided that Arch Western shall not be required to
preserve any such right, franchise, or the corporate, partnership or other existence of any of its
Restricted Subsidiaries if the preservation thereof is no longer

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desirable in the conduct of the business of Arch Coal and its Restricted Subsidiaries taken as
a whole and that the loss thereof is not adverse in any material respect to the Holders.

               SECTION 4.19. Waiver of Stay, Extension or Usury Laws. Arch Coal and each of the
Guarantors covenants (to the extent that it may lawfully do so) that it shall not at any time
insist upon, or plead (as a defense or otherwise) or in any manner whatsoever claim or take the
benefit or advantage of, any stay or extension law or any usury law or other law which would
prohibit or forgive any of Arch Coal and the Guarantors from paying all or any portion of the
principal of, premium, if any, and/or interest on the Notes or the Note Guarantees as contemplated
herein, wherever enacted, now or at any time hereafter in force, or which may affect the covenants
or the performance of this Indenture; and (to the extent that they may lawfully do so) each of Arch
Coal and the Guarantors hereby expressly waives all benefit or advantage of any such law, and
covenants that it will not hinder, delay or impede the execution of any power herein granted to the
Trustee, but will suffer and permit the execution of every such power as though no such law had
been enacted.

               SECTION 4.20. Further Instruments and Acts. Upon request of the Trustee (but without
imposing any duty or obligation of any kind on the Trustee to make any such request), Arch Coal and
the Guarantors shall execute and deliver such further instruments and do such further acts as may
be reasonably necessary or proper to carry out more effectively the purpose of this Indenture.

               SECTION 4.21. Covenant Termination. Upon the first date that (a) the Notes have
Investment Grade Ratings from both Ratings Agencies and (b) no Default has occurred and is
continuing hereunder, Arch Western and its Restricted Subsidiaries will not be subject to the
provisions of this Indenture described under Sections 4.06, 4.08, 4.09, 4.10, clause (a) and (b) of
Section 4.12, 4.14, 4.15 and clause (a)(2) of Section 5.01 hereof.

ARTICLE FIVE

CONSOLIDATION, MERGER OR SALE OF ASSETS

               SECTION 5.01. Consolidation, Merger or Sale of Assets. (a) Arch Coal shall not:

          (1) merge, consolidate or amalgamate with or into any Person (other than a merger of
a Wholly Restricted Subsidiary of Arch Coal into Arch Coal); or

          (2) in a single transaction or through a series of transactions, sell, assign,
convey, transfer, lease or otherwise dispose of all or substantially all of its
properties and assets to any Person or Persons, if such transaction or series of
transactions, in the aggregate, would result in the sale, assignment, conveyance,
transfer, lease or other disposition of all or substantially all of the Property of Arch
Coal to any other Person or Persons.

(b) Section (a) above shall not apply to Arch Coal if:

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     (1) at the time and immediately after giving effect to any such consolidation,
merger, transaction or series of transactions, either Arch Coal shall be the Surviving
Person or the Person (if other than Arch Coal) formed by such consolidation or into which
Arch Coal is merged or the Person that acquires by sale, assignment, conveyance,
transfer, lease or other disposition all or substantially all of Arch Coal’s Property:

	 	(A)	 	shall be a corporation, partnership or limited
liability company or a corporation duly organized and validly existing
under the laws of the United States of America, any state thereof or
the District of Columbia; provided that at any time the Surviving
Person is a partnership or a limited liability company, there shall be
a co-issuer of the Notes that is a corporation that also satisfies the
requirements of this covenant; and
	 
	 	(B)	 	expressly assumes (if other than Arch Coal), by
a supplemental indenture in form satisfactory to the Trustee, Arch
Coal’s obligations under the Notes, this Indenture, and the
Registration Rights Agreement, and the Notes, this Indenture, and the
Registration Rights Agreement remain in full force and effect as so
supplemented;

     (2) in the case of a sale, transfer, assignment, lease, conveyance or other
disposition of all or substantially all the Property, such Property shall have been
transferred as an entirety or virtually as an entirety to one Person;

     (3) immediately after giving effect to such transaction or series of transactions on
a pro forma basis (and treating, for purposes of this clause (3) and clause (4) below any
Debt that becomes, or is anticipated to become, an obligation of the Surviving Person or
any Restricted Subsidiary as a result of such transaction or series of transactions as
having been Incurred by the Surviving Person or such Restricted Subsidiary at the time of
such transaction or series of transactions), no Default or Event of Default shall have
occurred and be continuing;

     (4) immediately after giving effect to any such consolidation, merger, transaction
or series of transactions on a pro forma basis (on the assumption that the transaction or
series of transactions occurred on the first day of the four-quarter period immediately
prior to the consummation of such transaction or series of transactions with the
appropriate adjustments with respect to the transaction or series of transactions being
included in such pro forma calculation), the Surviving Person could incur at least $1.00
of additional Debt (other than Permitted Debt) in accordance with Section 4.06 hereto;

     (5) at the time of any such consolidation, merger, transaction or series of
transactions, Arch Coal or the Surviving Person shall have delivered to the Trustee, in
form and substance satisfactory to the Trustee, an Officers’ Certificate (attaching the
authentic computations to demonstrate compliance with clause (4 above) and an

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Opinion of Counsel, each stating that such consolidation, merger, sale, assignment,
conveyance, transfer, lease or other disposition, and if a supplemental indenture is
required in connection with such transaction, such supplemental indenture, comply with
the requirements of this Indenture and that all conditions precedent therein relating to
such transaction have been complied with and that this Indenture and the Guarantees
constitute legal, valid and binding obligations of the continuing person, enforceable in
accordance with their terms; and

     (6) Arch Coal shall have delivered to the Trustee an Opinion of Counsel to the
effect that the Holders will not recognize income, gain or loss for Federal income tax
purposes as a result of such transaction and will be subject to Federal income tax on the
same amounts, in the same manner and at the same times as would have been the case if
such consolidation, merger, transaction or series of transactions had not occurred.

     (c) Arch Coal shall not permit any Guarantor to consolidate with or merge with or into
any Person or sell, assign, transfer, convey or otherwise dispose of, all or substantially all
of its assets, in one or more related transactions, to any Person unless Arch Coal has
delivered to the Trustee an Officers’ Certificate and Opinion of Counsel stating that such
consolidation, merger, transaction or series of transactions complies with the following
conditions and each of the following conditions is satisfied:

     (1) the other Person is Arch Coal or any Wholly Owned Restricted Subsidiary that is
a Guarantor or becomes a Guarantor concurrently with the transaction; or

     (2) (A) either (x) the Guarantor shall be the Surviving Person or (y) the entity
formed by such consolidation or into which the Guarantor is merged, expressly assumes, by
a Guarantee or a supplemental indenture in form satisfactory to the Trustee, executed and
delivered to the Trustee by such surviving Person the due and punctual performance and
observance of all the obligations of such Guarantor under the Note Guarantee; and

	 	(B)	 	the Surviving Person, if other than the
Guarantor, is a corporation or limited liability company organized
under the laws of the United States, any state thereof or the District
of Columbia and immediately after giving effect to the transaction and
any related Incurrence of Debt of, no Default or Event of Default shall
have occurred and be continuing; or

     (3) the transaction constitutes a sale or other disposition (including by way of
consolidation or merger) of the Guarantor or the sale or disposition of all or
substantially all the assets of the Guarantor (in each case other than to another
Guarantor) and at the time of such transaction after giving pro forma effect thereto, the
provisions of clause (b)(4) of this covenant would be satisfied, the transaction is
otherwise permitted by this Indenture and the Guarantor is released from its Guarantee at
the time of such transaction in accordance with this Indenture.

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               SECTION 5.02. Successor Substituted. Upon any consolidation or merger, or any sale,
conveyance, transfer, lease or other disposition of all or substantially all of the property and
assets of Arch Coal in accordance with Section 5.01 of this Indenture, any Surviving Person formed
by such consolidation or into which Arch Coal is merged or to which such sale, conveyance,
transfer, lease or other disposition is made shall succeed to, and be substituted for, and may
exercise every right and power of, Arch Coal under this Indenture (or of the Guarantor under the
Note Guarantee, as the case may be) with the same effect as if such Surviving Person had been named
as Arch Coal (or such Guarantor) herein; provided, however, that Arch Coal shall not be released
from its obligation or covenants under this Indenture in the case of a sale, transfer, assignment,
conveyance or other disposition (unless such sale, transfer, assignment, conveyance or other
disposition is of all the assets of Arch Coal as an or virtually as an entirety) or a lease.

ARTICLE SIX

DEFAULTS AND REMEDIES

               SECTION 6.01. Events of Default. (a) “Event of Default”, wherever used
herein, means any one of the following events (whatever the reason for such Event of Default and
whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any
judgment, decree or order of any court or any order, rule or regulation of any administrative or
governmental body):

     (i) the failure to make the payment of any interest (including Special Interest) on the
Notes when the same becomes due and payable, and such default shall continue for a period of
30 days; or

     (ii) the failure to make the payment of principal of, or premium, if any, on any of the
Notes when the same becomes due and payable at its Stated Maturity, upon acceleration,
redemption, optional redemption, required repurchase or otherwise; or

     (iii) a default in the performance, or breach, of any covenant or agreement of Arch
Coal or any Guarantor under Sections 4.09, 4.11 and 5.01; or

     (iv) a default in the performance, or breach, of any covenant or agreement of Arch Coal
or any Guarantor under this Indenture or the Guarantees (other than a default in the
performance, or breach, of a covenant or agreement which is specifically dealt with
elsewhere in this Section 6.01) and such default or breach shall continue for a period of 60
days after written notice (the “Notice of Default”) has been given, by registered or
certified mail, (x) to Arch Coal by the Trustee or (y) to Arch Coal and the Trustee by the
Holders of at least 25% in aggregate principal amount of the outstanding Notes; Arch Coal
shall deliver to the Trustee, within 30 days after the occurrence thereof, written notice in
the form of an Officers’ Certificate of any event that with the giving of notice or the
lapse of time or both would become an Event of Default, its status and what action is being
taken or proposed to be taken with respect thereto; or

     (v) a default under any Debt by Arch Coal or any Restricted Subsidiary that results in
acceleration of the maturity of such Debt, or failure to pay any such Debt at

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maturity, in an aggregate amount greater than $40.0 million or its foreign currency
equivalent at the time; or

     (vi) any judgment or judgments for the payment of money in an aggregate amount in
excess of $40.0 million (or its foreign currency equivalent at the time) that shall be
rendered against Arch Coal or any Restricted Subsidiary and that shall not be waived,
satisfied or discharged for any period of 30 consecutive days during which a stay of
enforcement shall not be in effect; or

     (vii) the entry by a court of competent jurisdiction of (A) a decree or order for
relief in respect of Arch Coal, any Guarantor or any other Significant Subsidiary in an
involuntary case or proceeding under any applicable Bankruptcy Law or (B) a decree or order
adjudging Arch Coal, any Guarantor or any other Significant Subsidiary bankrupt or
insolvent, or seeking reorganization, arrangement, adjustment or composition of or in
respect of Arch Coal, any Guarantor or any other Significant Subsidiary under any applicable
law, or appointing a custodian, receiver, liquidator, assignee, trustee, sequestrator (or
other similar official) of Arch Coal, any Guarantor or any other Significant Subsidiary or
of any substantial part of their respective properties or ordering the winding up or
liquidation of their affairs, and any such decree, order or appointment pursuant to any
Bankruptcy Law for relief shall continue to be in effect, or any such other decree,
appointment or order shall be unstayed and in effect, for a period of 60 consecutive days;
or

     (viii) (A) Arch Coal, any Guarantor or any other Significant Subsidiary (x) commences a
voluntary case or proceeding under any applicable Bankruptcy Law or any other case or
proceeding to be adjudicated bankrupt or insolvent or (y) consents to the filing of a
petition, application, answer or consent seeking reorganization or relief under any
applicable Bankruptcy Law, (B) Arch Coal, any Guarantor or any other Significant Subsidiary
consents to the entry of a decree or order for relief in respect of Arch Coal, any Guarantor
or any other Significant Subsidiary in an involuntary case or proceeding under any
applicable Bankruptcy Law or to the commencement of any bankruptcy or insolvency case or
proceeding against it or, (C) Arch Coal, any Guarantor or any other Significant Subsidiary
(x) consents to the appointment of, or taking possession by, a custodian, receiver,
liquidator, administrator, supervisor, assignee, trustee, sequestrator or similar official
of Arch Coal, any Guarantor or any other Significant Subsidiary or of any substantial part
of their respective properties, (y) makes an assignment for the benefit of creditors or
(z) admits in writing its inability to pay its debts generally as they become due; or

     (ix) any Note Guarantee shall be held in any judicial proceeding to be unenforceable or
invalid or shall cease for any reason to be in full force and effect or any Guarantor, or
any Person acting on behalf of any Guarantor, shall deny or disaffirm its obligations under
any Note Guarantee; or

        (b) If a Default or an Event of Default occurs and is continuing and is known to a Trust
Officer of the Trustee, the Trustee shall mail to each Holder notice of the Default or Event
of Default within five business days after its occurrence. Except in the case of a

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Default or an Event of Default in payment of principal of, premium, if any, on the Notes
or interest, if any, on any Note, the Trustee may withhold the notice to the Holders if and so
long as a committee of its Trust Officers in good faith determines that withholding the notice
is in the interests of the Holders. Arch Coal shall also notify the Trustee within five
Business Days of the occurrence of any Event of Default.

               SECTION 6.02. Acceleration. (a) If an Event of Default with respect to the Notes
(other than an Event of Default specified in Section 6.01(vii) or (viii) above) occurs and is
continuing, then and in every such case the Trustee or the Holders of not less than 25% in
aggregate principal amount of the Notes then outstanding by written notice to Arch Coal (and to the
Trustee if such notice is given by the Holders) may and the Trustee, upon the written request of
such Holders shall, declare the principal amount of all of the outstanding Notes immediately due
and payable, and upon any such declaration such principal amount in respect of the Notes shall
become immediately due and payable.

     (b) If an Event of Default specified in Section 6.01(vii) or (viii) above
occurs and is continuing, then the principal amount of all of the outstanding Notes shall ipso
facto become and be immediately due and payable without any declaration or other act on the
part of the Trustee or any Holder.

     (c) At any time after a declaration of acceleration under this Indenture, but before a
judgment or decree for payment of the money due has been obtained by the Trustee, the Holders
of a majority in aggregate principal amount of the outstanding Notes, by written notice to
Arch Coal and the Trustee, may waive all past Defaults and rescind and annul such declaration
of acceleration and its consequences if:

     (1) Arch Coal or the Guarantors have paid or deposited with the Trustee a sum
sufficient to pay:

	 	(A)	 	all overdue interest, if any, on all Notes then
outstanding;
	 
	 	(B)	 	all unpaid principal of and premium, if any, on
any outstanding Notes that has become due otherwise than by such
declaration of acceleration and interest thereon at the rate borne by
the Notes;
	 
	 	(C)	 	to the extent that payment of such interest is
lawful, interest upon overdue interest, if any, at the rate borne by
the Notes; and
	 
	 	(D)	 	all sums paid or advanced by the Trustee under
this Indenture and the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and counsel;

     (2) the rescission would not conflict with any judgment or decree of a court of
competent jurisdiction; and

     (3) all Events of Default, other than the non-payment of amounts of principal of,
premium, if any, and interest, if any, on the Notes that has become due solely by
such declaration of acceleration, have been cured or waived as provided in
Section 6.04.

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       No such rescission shall affect any subsequent default or impair any right consequent thereon.

      (d) Notwithstanding Section 6.02(c) above, in the event of a declaration of acceleration
in respect of the Notes because of an Event of Default specified in Section 6.01(a)(v) shall
have occurred and be continuing, such declaration of acceleration shall be automatically
annulled if the Indebtedness that is the subject of such Event of Default has been discharged
or the Holders thereof have rescinded their declaration of acceleration in respect of such
Indebtedness, and written notice of such discharge or rescission, as the case may be, shall
have been given to the Trustee by Arch Coal and countersigned by the Holders of such
Indebtedness or a trustee, fiduciary or agent for such Holders, within 30 days after such
declaration of acceleration in respect of the Notes, and no other Event of Default has
occurred during such 30-day period which has not been cured or waived during such period.

      (e) Subject to the Article Seven this Indenture relating to the duties of the Trustee, in
case an Event of Default shall occur and be continuing, the Trustee will be under no
obligation to exercise any of its rights or powers under this Indenture at the request or
direction of any of the Holders, unless such Holders shall have offered to the Trustee
reasonable indemnity. Subject to such provisions for the indemnification of the Trustee, the
Holders of at least a majority in aggregate principal amount of the Notes then outstanding
will have the right to direct the time, method and place of conducting any proceeding for any
remedy available to the Trustee or exercising any trust or power conferred on the Trustee with
respect to the Notes.

      No holder of Notes will have any right to institute any proceeding with respect to this
Indenture, or for the appointment of a receiver or trustee, or for any remedy thereunder, unless:

     (1) such holder has previously given to the Trustee written notice of a continuing
Event of Default;

     (2) the registered Holders of at least 25% in aggregate principal amount of the
Notes then outstanding have made a written request and offered reasonable indemnity to
the Trustee to institute such proceeding as Trustee; and

     (3) the Trustee shall not have received from the registered Holders of at least a
majority in aggregate principal amount of the Notes then outstanding a direction
inconsistent with such request and shall have failed to institute such proceeding within
60 days.

However, such limitations do not apply to a suit instituted by a holder of any Note for enforcement
of payment of the principal of, and premium, if any, or interest on, such Note on or after the
respective due dates expressed in such Note.

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               SECTION 6.03. Other Remedies. If an Event of Default occurs and is continuing, the
Trustee may in its discretion proceed to protect and enforce its rights and the rights of the
Holders by such appropriate judicial proceedings as the Trustee shall deem most effectual to
protect and enforce any such rights, whether for the specific enforcement of any covenant or
agreement in this Indenture or in aid of the exercise of any power granted herein, or to enforce
any other proper remedy.

       All rights of action and claims under this Indenture or the Notes may be prosecuted and
enforced by the Trustee without the possession of any of the Notes or the production thereof in any
proceeding relating thereto, and any such proceeding instituted by the Trustee shall be brought in
its own name and as trustee of an express trust, and any recovery of judgment shall, after
provision for the payment of the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel, be for the ratable benefit of the Holders in respect of which
such judgment has been recovered.

               SECTION 6.04. Waiver of Past Defaults. The Holders of not less than a majority in
principal amount of the outstanding Notes may on behalf of the Holders of all the Notes waive any
past Default hereunder and its consequences, except a Default:

     (a) in respect of the payment of the principal of (or premium, if any), or interest on,
any Note, or

     (b) in respect of a covenant or provision hereof which under Article Nine cannot be
modified or amended without the consent of the Holder of each outstanding Note affected.

       Upon any such waiver, such Default shall cease to exist, and any Event of Default arising
therefrom shall be deemed to have been cured, for every purpose of this Indenture; but no such
waiver shall extend to any subsequent or other Default or Event of Default or impair any right
consequent thereon.

               SECTION 6.05. Control by Majority. The Holders of not less than a majority in
aggregate principal amount of the Notes may direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or of exercising any trust or power conferred on
the Trustee under this Indenture; provided that:

     (a) the Trustee may refuse to follow any direction that conflicts with law, this
Indenture or that the Trustee determines in good faith may be unduly prejudicial to the rights
of Holders not joining in the giving of such direction;

     (b) the Trustee may refuse to follow any direction that the Trustee determines is unduly
prejudicial to the rights of other Holders or would involve the Trustee in personal liability;
and

     (c) the Trustee may take any other action deemed proper by the Trustee that is not
inconsistent with such direction.

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       Prior to taking or not taking any action hereunder, the Trustee shall be entitled to
indemnification satisfactory to it in its sole discretion against all losses and expenses caused by
taking or not taking such action.

               SECTION 6.06. Limitation on Suits. A Holder may not pursue any remedy with respect to
this Indenture or the Notes unless:

     (a) the Holder has previously given the Trustee written notice of a continuing Event of
Default;

     (b) the Holders of at least 25% in aggregate principal amount of outstanding Notes shall
have made a written request to the Trustee to pursue such remedy;

     (c) such Holder or Holders offer the Trustee indemnity reasonably satisfactory to the
Trustee against any costs, liability or expense;

     (d) the Trustee does not comply with the request within 60 days after receipt of the
request and the offer of indemnity; and

     (e) during such 60-day period, the Holders of a majority in aggregate principal amount of
the outstanding Notes do not give the Trustee a direction that is inconsistent with the
request.

       The limitations in the foregoing provisions of this Section 6.06, however, do not apply to a
suit instituted by a Holder for the enforcement of the payment of the principal of, premium, if
any, or interest, if any, on such Note on or after the respective due dates expressed in such Note.

       A Holder may not use this Indenture to prejudice the rights of any other Holder or to obtain a
preference or priority over another Holder.

               SECTION 6.07. Unconditional Right of Holders to Receive Payment. Notwithstanding any
other provision of this Indenture, the right of any Holder to receive payment of principal of,
premium, if any, and interest, if any, on the Notes held by such Holder, on or after the respective
due dates expressed in the Notes, or to bring suit for the enforcement of any such payment on or
after such respective dates, shall not be impaired or affected without the consent of such Holder.

               SECTION 6.08. Collection Suit by Trustee. Arch Coal covenants that if default is made
in the payment of:

     (a) any installment of interest on any Note when such interest becomes due and payable
and such default continues for a period of 30 days, or

     (b) the principal of (or premium, if any, on) any Note at the Maturity thereof,

Arch Coal shall, upon demand of the Trustee, pay to the Trustee for the benefit of the Holders of
such Notes, the whole amount then due and payable on such Notes for principal (and premium, if
any), and interest, and interest on any overdue principal (and premium, if any) and, to the extent

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that payment of such interest shall be legally enforceable, upon any overdue installment of
interest, at the rate borne by the Notes, and, in addition thereto, such further amount as shall be
sufficient to cover the amounts provided for in Section 7.07 and such further amount as shall be
sufficient to cover the costs and expenses of collection, including the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel.

     (c) If Arch Coal fails to pay such amounts forthwith upon such demand, the Trustee, in
its own name as trustee of an express trust, may institute a judicial proceeding for the
collection of the sums so due and unpaid, may prosecute such proceeding to judgment or final
decree and may enforce the same against Arch Coal or any other obligor upon the Notes and
collect the moneys adjudged or decreed to be payable in the manner provided by law out of the
property of Arch Coal or any other obligor upon the Notes, wherever situated.

               SECTION 6.09. Trustee May File Proofs of Claim. The Trustee may file such proofs of
claim and other papers or documents as may be necessary or advisable in order to have the claims of
the Trustee (including any claim for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.07) and the Holders allowed in any judicial proceedings relative to Arch Coal or any
Guarantor, their creditors or their property and, unless prohibited by law or applicable
regulations, may vote on behalf of the Holders at their direction in any election of a trustee in
bankruptcy or other Person performing similar functions, and any Custodian in any such judicial
proceeding is hereby authorized by each Holder to make payments to the Trustee and, in the event
that the Trustee shall consent to the making of such payments directly to the Holders, to pay to
the Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances
of the Trustee, its agents and its counsel, and any other amounts due the Trustee under
Section 7.07.

       Nothing herein contained shall be deemed to empower the Trustee to authorize or consent to, or
accept or adopt on behalf of any Holder, any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder thereof, or to authorize the Trustee to
vote in respect of the claim of any Holder in any such proceeding.

               SECTION 6.10. Application of Money Collected. If the Trustee collects any money or
other property (or the same is distributed) pursuant to this Article Six, it shall pay out the
money or property in the following order:

	 	FIRST:	 	to the Trustee (including any predecessor Trustee) for amounts due under
Section 7.07;
	 
	 	SECOND:	 	to Holders for amounts due and unpaid on the Notes for principal of, premium, if
any, and interest, if any, ratably, without preference or priority of any kind,
according to the amounts due and payable on the Notes for principal, premium, if any,
and interest, if any, respectively; and
	 
	 	THIRD:	 	to Arch Coal, any Guarantor or any other obligors of the Notes, as their interests
may appear, or as a court of competent jurisdiction may direct.

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       The Trustee may fix a Record Date and payment date for any payment to Holders pursuant to this
Section 6.10. At least 15 days before such Record Date, Arch Coal shall mail to each Holder and
the Trustee a notice that states the Record Date, the payment date and amount to be paid.

               SECTION 6.11. Undertaking for Costs. A court may in its discretion require, in any
suit for the enforcement of any right or remedy under this Indenture or in any suit against the
Trustee for any action taken or omitted by it as Trustee, the filing by any party litigant in the
suit of an undertaking to pay the costs of such suit, and such court may in its discretion assess
reasonable costs, including reasonable attorneys’ fees, against any party litigant in such suit,
having due regard to the merits and good faith of the claims or defenses made by the party
litigant. This Section 6.11 does not apply to a suit by the Trustee, a suit by Holders of more
than 10% in aggregate principal amount of the outstanding Notes or to any suit by any Holder
pursuant to Section 6.07.

               SECTION 6.12. Restoration of Rights and Remedies. If the Trustee or any Holder has
instituted any proceeding to enforce any right or remedy under this Indenture and such proceeding
has been discontinued or abandoned for any reason, or has been determined adversely to the Trustee
or to such Holder, then and in every such case, subject to any determination in such proceeding,
Arch Coal, any Guarantor, the Trustee and the Holders shall be restored severally and respectively
to their former positions hereunder and thereafter all rights and remedies of the Trustee and the
Holders shall continue as though no such proceeding had been instituted.

               SECTION 6.13. Rights and Remedies Cumulative. Except as otherwise provided with
respect to the replacement or payment of mutilated, destroyed, lost or stolen Notes in
Section 2.07, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders
is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the
extent permitted by law, be cumulative and in addition to every other right and remedy given
hereunder or now or hereafter existing at law or in equity or otherwise. The assertion of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment
of any other appropriate right or remedy.

               SECTION 6.14. Delay or Omission Not Waiver. No delay or omission of the Trustee or of
any Holder of any Note to exercise any right or remedy accruing upon any Event of Default shall
impair any such right or remedy or constitute a waiver of any such Event of Default or an
acquiescence therein. Every right and remedy given by this Article Six or by law to the Trustee or
to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the
Trustee or by the Holders, as the case may be.

               SECTION 6.15. Record Date. Arch Coal may set a Record Date for purposes of
determining the identity of Holders entitled to vote or to consent to any action by vote or consent
authorized or permitted by Sections 6.04, 6.05 and 11.04. Unless this Indenture provides
otherwise, such Record Date shall be the later of 30 days prior to the first solicitation of such
consent or the date of the most recent list of Holders furnished to the Trustee pursuant to
Section 2.05 prior to such solicitation.

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               SECTION 6.16. Waiver of Stay or Extension Laws. Arch Coal covenants (to the extent
that it may lawfully do so) that it shall not at any time insist upon, or plead, or in any manner
whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted,
now or at any time hereafter in force, which may affect the covenants or the performance of this
Indenture; and Arch Coal (to the extent that it may lawfully do so) hereby expressly waives all
benefit or advantage of any such law and covenants that it shall not hinder, delay or impede the
execution of any power herein granted to the Trustee, but shall suffer and permit the execution of
every such power as though no such law had been enacted.

ARTICLE SEVEN

TRUSTEE

               SECTION 7.01. Duties of Trustee. (a) If an Event of Default has occurred and is
continuing of which a Trust Officer of the Trustee has actual knowledge, the Trustee shall exercise
such of the rights and powers vested in it by this Indenture, and use the same degree of care and
skill in their exercise as a prudent person would exercise or use under the circumstances in the
conduct of such person’s own affairs;

     (b) except during the continuance of an Event of Default of which a Trust Officer of the
Trustee has actual knowledge: (i) the Trustee undertakes to perform such duties and only such
duties as are specifically set forth in this Indenture and no others and no implied covenants
or obligations shall be read into this Indenture against the Trustee; and (ii) in the absence
of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements
and the correctness of the opinions expressed therein, upon certificates or opinions furnished
to the Trustee and conforming to the requirements of this Indenture. In the case of any such
certificates or opinions which by any provisions hereof are specifically required to be
furnished to the Trustee, the Trustee shall examine same to determine whether they conform to
the requirements of this Indenture (but need not confirm or investigate the accuracy of
mathematical calculations or other facts stated therein);

     (c) the Trustee shall not be relieved from liability for its own negligent action, its
own negligent failure to act or its own willful misconduct, except that:

          (1) this paragraph does not limit the effect of paragraph (b) of this Section 7.01;

          (2) the Trustee shall not be liable for any error of judgment made in good faith by
a Trust Officer unless it is proved that the Trustee was negligent in ascertaining the
pertinent facts; and

          (3) the Trustee shall not be liable with respect to any action it takes or omits to
take in good faith in accordance with a direction received by it pursuant to
Section 6.05;

     (d) the Trustee shall not be liable for interest on any money received by it except as
the Trustee may agree in writing with Arch Coal or any Guarantor. Money held in trust by the
Trustee need not be segregated from other funds except to the extent required by law;

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     (e) no provision of this Indenture shall require the Trustee to expend or risk its own
funds or otherwise incur financial liability in the performance of any of its duties hereunder
or in the exercise of any of its rights or powers, if it shall have reasonable grounds to
believe that repayment of such funds or adequate indemnity against such risk or liability is
not reasonably assured to it; and

     (f) whether or not therein expressly so provided, every provision of this Indenture
relating to the conduct or affecting the liability of or affording protection to the Trustee
shall be subject to the provisions of this Section 7.01 and to the provisions of the TIA.

               SECTION 7.02. Certain Rights of Trustee. (a) Subject to Section 7.01:

          (1) the Trustee may rely, and shall be protected in acting or refraining from
acting, upon any resolution, certificate, statement, instrument, opinion, report, notice,
request, direction, consent, order, bond, debenture, note, other evidence of indebtedness
or other paper or document believed by it to be genuine and to have been signed or
presented by the proper person;

          (2) before the Trustee acts or refrains from acting, it may require an Officers’
Certificate or an Opinion of Counsel, which shall conform to Section 12.05. The Trustee
shall not be liable for any action it takes or omits to take in good faith in reliance on
such certificate or opinion;

          (3) the Trustee may act through its attorneys and agents and shall not be
responsible for the misconduct or negligence of any attorney or agent appointed with due
care by it hereunder;

          (4) the Trustee shall be under no obligation to exercise any of the rights or powers
vested in it by this Indenture at the request or direction of any of the Holders, unless
such Holders shall have offered to the Trustee reasonable security or indemnity against
the costs, expenses and liabilities that might be incurred by it in compliance with such
request or direction;

          (5) the Trustee shall not be liable for any action it takes or omits to take in good
faith that it believes to be authorized or within its rights or powers, provided that the
Trustee’s conduct does not constitute negligence or bad faith;

          (6) whenever in the administration of this Indenture the Trustee shall deem it
desirable that a matter be proved or established prior to taking, suffering or omitting
any action hereunder, the Trustee (unless other evidence be herein specifically
prescribed) may, in the absence of bad faith on its part, rely upon an Officers’
Certificate;

          (7) the Trustee shall not be bound to make any investigation into the facts or
matters stated in any resolution, certificate, statement, instrument, opinion, report,
notice, request, direction, consent, order, bond, debenture, note, other evidence of
indebtedness or other paper or document, but the Trustee, in its discretion, may make
such further inquiry or investigation into such facts or matters as it may see fit, and,
if

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the Trustee shall determine to make such further inquiry or investigation, it shall
be entitled to examine the books, records and premises of Arch Coal personally or by
agent or attorney;

          (8) the rights, privileges, protections, immunities and benefits given to the
Trustee, including, without limitation, its right to be indemnified, are extended to, and
shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent,
custodian and other Person employed to act hereunder; and the permissive right of the
Trustee to take any action under this Indenture or under any other agreement in
connection herewith shall not be construed as a duty;

          (9) each Guarantor shall pay on demand to the Trustee any and all costs, fees and
expenses (including without limitation, reasonable legal fees of counsel) incurred by the
Trustee in enforcing any rights under any Guarantee;

          (10) the Trustee shall not be deemed to have notice of any Default or Event of
Default unless a Trust Officer of the Trustee has actual knowledge thereof or unless
written notice of any event which is in fact such a default is received by the Trustee at
the Corporate Trust Office of the Trustee, and such notice references the Notes and this
Indenture;

          (11) the permissive right of the Trustee to take any action under this Indenture or
under any other agreement in connection herewith shall not be construed as a duty;

          (12) unless otherwise specifically provided in this Indenture, any demand, request,
direction or notice from Arch Coal shall be sufficient if signed by an Officer of Arch
Coal; and

          (13) the trustee may consult with counsel and the advice of such counsel or any
Opinion of Counsel shall be full and complete authorization and protection from liability
in respect of any action taken, suffered or omitted by it hereunder in good faith and in
reliance thereon.

     (b) The Trustee may request that Arch Coal deliver an Officers’ Certificate setting forth
the names of the individuals and/or titles of officers authorized at such time to take
specified actions pursuant to this Indenture, which Officers’ Certificate may be signed by any
person authorized to sign an Officers’ Certificate, including any person specified as so
authorized in any such certificate previously delivered and not superseded.

               SECTION 7.03. Individual Rights of Trustee. The Trustee, any Paying Agent, any
Registrar or any other agent of Arch Coal or of the Trustee, in its individual or any other
capacity, may become the owner or pledgee of Notes and, subject to TIA Sections 310(b) and 311, may
otherwise deal with Arch Coal with the same rights it would have if it were not Trustee, Paying
Agent, Registrar or such other agent.

               SECTION 7.04. Trustee’s Disclaimer. The recitals contained herein and in the Notes,
except for the Trustees certificates of authentication, shall be taken as the statements of Arch
Coal, and the Trustee assumes no responsibility for their correctness. The Trustee

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makes no representations as to the validity or sufficiency of this Indenture or of the Notes,
except that the Trustee represents that it is duly authorized to execute and deliver this
Indenture, authenticate the Notes and perform its obligations hereunder and agrees that the
statements made by it in a Statement of Eligibility on Form T-1 supplied to Arch Coal will be true
and accurate, subject to the qualifications set forth therein. The Trustee shall not be
accountable for the use or application by Arch Coal of Notes or the proceeds thereof. It shall not
be responsible for the use or application of any money received by any Paying Agent other than the
Trustee, and it shall not be responsible for any statement or recital herein or any statement in
the Notes or any other document in connection with the issuance or sale of the Notes or pursuant to
this Indenture other than its certificate of authentication.

               SECTION 7.05. Notice of Defaults. If any Default or any Event of Default occurs and
is continuing and if such Default or Event of Default is known to the Trustee, the Trustee shall
mail to each Holder in the manner and to the extent provided in TIA Section 313(c) notice of the
Default or Event of Default within 45 days after it occurs, unless such Default or Event of Default
has been cured; provided, however, that, except in the case of a default in the payment of the
principal of, premium, if any, or interest on any Note, the Trustee shall be protected in
withholding such notice if and so long as a committee of its Trust Officers in good faith determine
that the withholding of such notice is in the interest of the Holders.

       The Trustee shall not be deemed to have knowledge of a Default unless a Trust Officer has
actual knowledge of such Default or written notice of such Default has been received by the Trustee
at the Corporate Trust Office, and such notice references the Notes and this Indenture.

               SECTION 7.06. Reports by Trustee to Holders. Within 60 days after January 1 of each
year commencing with the first January 1 after the Issue Date, the Trustee shall transmit to the
Holders, in the manner and to the extent provided in TIA Section 313(c), a brief report dated as of
such date that complies with TIA Section 313(a). The Trustee also shall comply with TIA
Section 313(b) and (c).

       Arch Coal shall promptly notify the Trustee whenever the Notes become listed on any securities
exchange and of any delisting thereof and the Trustee shall comply with TIA Section 313(d).

               SECTION 7.07. Compensation and Indemnity. Arch Coal, failing which each Guarantor,
shall pay to the Trustee such compensation as shall be agreed in writing for its services
hereunder. The Trustee’s compensation shall not be limited by any law on compensation of a trustee
of an express trust. Arch Coal, failing which each Guarantor, shall reimburse the Trustee upon
request for all reasonable out-of-pocket expenses incurred or made by it, including costs of
collection, in addition to the compensation for its services. Such expenses shall include the
reasonable compensation and out-of-pocket expenses of the Trustee’s agents and counsel.

       Arch Coal, failing which each Guarantor, shall indemnify the Trustee (in any of its capacities
in connection with any of the transactions contemplated hereby, including, without limitation,
under this Indenture) and its officers, directors, employees and agents for, and hold it and them
harmless from and against any and all loss, liability or expense (including attorneys’

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fees and expenses) incurred by it or any of them without willful misconduct or negligence on
its part arising out of or in connection with the administration of this trust and the performance
of its duties hereunder (including the costs and expenses of enforcing this Indenture including
this Section 7.07 and of defending itself against any claim, whether asserted by Arch Coal, the
Guarantors, any Holder or any other Person). The Trustee shall notify Arch Coal promptly of any
claim for which it may seek indemnity. Failure by the Trustee to so notify Arch Coal shall not
relieve Arch Coal or the Guarantors of their obligations hereunder. Arch Coal shall defend the
claim and the Trustee shall cooperate in such defense. The Trustee may have separate counsel and
Arch Coal shall pay the fees and expenses of such counsel. Arch Coal need not pay for any
settlement made without its consent, which consent may not be unreasonably withheld. Arch Coal
shall not reimburse any expense or indemnify against any loss, liability or expense incurred by the
Trustee through the Trustee’s own willful misconduct or negligence.

     To secure Arch Coal’s and each of the Guarantor’s payment obligations in this Section 7.07,
the Trustee shall have a Lien prior to the Notes upon the Collateral and on all money or property
held or collected by the Trustee, hereunder, in its capacity as Trustee, except money or property
held in trust to pay principal of, premium, if any, and interest on particular Notes.

     When the Trustee incurs expenses after the occurrence of a Default specified in
Section 6.01(a)(vii) or (viii) with respect to Arch Coal, the Guarantors, or any Restricted
Subsidiary, the expenses are intended to constitute expenses of administration under Bankruptcy
Law.

     Arch Coal’s and each of the Guarantor’s obligations under this Section 7.07, including the
Lien and claim of the Trustee, and any claim arising hereunder shall survive the resignation or
removal of any Trustee, the satisfaction and discharge of Arch Coal’s or Guarantor’s obligations
pursuant to Article Eight and any rejection or termination under any Bankruptcy Law, and the
termination of this Indenture for any reason, and shall apply with equal force and effect to the
Trustee in each of its capacities hereunder and each agent, custodian and other Person employed to
act hereunder.

     “Trustee” for purposes of this Section 7.07 shall include any predecessor Trustee; provided,
however, that the negligence or willful misconduct of any Trustee hereunder shall not affect the
rights of any other Trustee hereunder.

               SECTION 7.08. Replacement of Trustee. A resignation or removal of the Trustee and
appointment of a successor Trustee shall become effective only upon the successor Trustee’s
acceptance of appointment as provided in this Section 7.08.

     The Trustee may resign at any time by so notifying Arch Coal. The Holders of a majority in
outstanding principal amount of the outstanding Notes may remove the Trustee by so notifying the
Trustee and Arch Coal. Arch Coal shall remove the Trustee if:

     (a) the Trustee fails to comply with Section 7.10;

     (b) the Trustee is adjudged bankrupt or insolvent;

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     (c) a receiver or other public officer takes charge of the Trustee or its property; or

     (d) the Trustee otherwise becomes incapable of acting.

       If the Trustee resigns or is removed, or if a vacancy exists in the office of Trustee for any
reason, Arch Coal shall promptly appoint a successor Trustee. Within one year after the successor
Trustee takes office, the Holders of a majority in principal amount of the outstanding Notes may
appoint a successor Trustee to replace the successor Trustee appointed by Arch Coal. If the
successor Trustee does not deliver its written acceptance required by the next succeeding paragraph
of this Section 7.08 within 30 days after the retiring Trustee resigns or is removed, the retiring
Trustee, Arch Coal or the Holders of a majority in principal amount of the outstanding Notes may,
at the expense of Arch Coal, petition any court of competent jurisdiction for the appointment of a
successor Trustee.

       A successor Trustee shall deliver a written acceptance of its appointment to the retiring
Trustee and to Arch Coal. Thereupon the resignation or removal of the retiring Trustee shall
become effective, and the successor Trustee shall have all the rights, powers and duties of the
Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to
Holders. The retiring Trustee shall promptly transfer all property held by it as Trustee to the
successor Trustee.

       If a successor Trustee does not take office within 60 days after the retiring Trustee resigns
or is removed, the retiring Trustee, Arch Coal or the Holders of at least 25% in outstanding
principal amount of the Notes may, at Arch Coal’s expense, petition any court of competent
jurisdiction for the appointment of a successor Trustee at the expense of Arch Coal.

       If the Trustee fails to comply with Section 7.10, any Holder may petition any court of
competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

       The retiring Trustee shall promptly transfer all property held by it as Trustee to the
successor Trustee, provided that all sums owing to the retiring Trustee hereunder have been paid
and subject to the lien provided for in Section 7.07. Notwithstanding the replacement of the
Trustee pursuant to this Section 7.08, Arch Coal’s and the Guarantors’ obligations under
Section 7.07 shall continue for the benefit of the retiring Trustee.

               SECTION 7.09. Successor Trustee by Merger. Any corporation into which the Trustee may
be merged or converted or with which it may be consolidated, or any corporation resulting from any
merger, conversion or consolidation to which the Trustee shall be a party, or any corporation
succeeding to all or substantially all of the corporate trust business of the Trustee, shall be the
successor of the Trustee hereunder, provided such corporation shall be otherwise qualified and
eligible under this Article Seven, without the execution or filing of any paper or any further act
on the part of any of the parties hereto. In case any Notes shall have been authenticated, but not
delivered, by the Trustee then in office, any successor by merger, conversion or consolidation to
such authenticating Trustee may adopt such authentication and deliver the Notes so authenticated
with the same effect as if such successor Trustee had itself authenticated such Notes. In case at
that time any of the Notes shall not have been authenticated, any successor Trustee may
authenticate such Notes either in the name of any predecessor

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hereunder or in the name of the successor Trustee. In all such cases such certificates shall
have the full force and effect which this Indenture provides for the certificate of authentication
of the Trustee shall have; provided, however, that the right to adopt the certificate of
authentication of any predecessor Trustee or to authenticate Notes in the name of any predecessor
Trustee shall apply only to its successor or successors by merger, conversion or consolidation.

               SECTION 7.10. Eligibility: Disqualification. The Trustee shall at all times satisfy
the requirements of TIA Section 310(a)(1) and (5). The Trustee shall have a combined capital and
surplus of at least $50,000,000 as set forth in its most recent published annual report of
condition. No obligor upon the Notes or Person directly controlling, controlled by, or under
common control with such obligor shall serve as trustee upon the Notes. The Trustee shall comply
with TIA Section 310(b); provided, however, that there shall be excluded from the operation of TIA
Section 310(b)(1) any indenture or indentures under which other securities or certificates of
interest or participation in other notes of Arch Coal are outstanding if the requirements for such
exclusion set forth in TIA Section 310(b)(1) are met.

       For purposes of Section 310(b)(1) of the TIA and to the extent permitted thereby, the Trustee,
in its capacity as trustee in respect of the Securities of any series, shall not be deemed to have
a conflict of interest arising from its capacity as trustee in respect of the Securities of any
other series.

       Nothing herein shall prevent the Trustee from filing with the Commission the application
referred to in the second to last paragraph of Section 310(b) of the TIA.

       If the Trustee has or shall acquire a conflicting interest within the meaning of the TIA, the
Trustee shall either eliminate such interest or resign, to the extent and in the manner provided
by, and subject to the provisions of, the Trust Indenture Act and this Indenture.

               SECTION 7.11. Preferential Collection of Claims Against Arch Coal. The Trustee shall
comply with TIA Section 311(a), excluding any creditor relationship listed in TIA Section 311(b).
A Trustee who has resigned or been removed shall be subject to TIA Section 311(a) to the extent
indicated therein.

               SECTION 7.12. Appointment of Co-Trustee. (a) It is the purpose of this Indenture
that there shall be no violation of any law of any jurisdiction denying or restricting the right of
banking corporations or associations to transact business as trustee in such jurisdiction. It is
recognized that in case of litigation under this Indenture, and in particular in case of the
enforcement thereof on default, or in the case the Trustee deems that by reason of any present or
future law of any jurisdiction it may not exercise any of the powers, rights or remedies herein
granted to the Trustee or hold title to the properties, in trust, as herein granted or take any
action which may be desirable or necessary in connection therewith, it may be necessary that the
Trustee appoint an individual or institution as a separate or co-trustee. The following provisions
of this Section 7.12 are adopted to these ends.

     (b) In the event that the Trustee appoints an additional individual or institution as a
separate or co-trustee, each and every remedy, power, right, claim, demand, cause of action,
immunity, estate, title, interest and Lien expressed or intended by this Indenture to

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be exercised by or vested in or conveyed to the Trustee with respect thereto shall be
exercisable by and vest in such separate or co-trustee but only to the extent necessary to
enable such separate or co-trustee to exercise such powers, rights and remedies, and only to
the extent that the Trustee by the laws of any jurisdiction is incapable of exercising such
powers, rights and remedies, and every covenant and obligation necessary to the exercise
thereof by such separate or co-trustee shall run to and be enforceable by either of them.

     (c) Should any instrument in writing from Arch Coal be required by the separate or
co-trustee so appointed by the Trustee for more fully and certainly vesting in and confirming
to him or it such properties, rights, powers, trusts, duties and obligations, any and all such
instruments in writing shall, on request, be executed, acknowledged and delivered by Arch
Coal; provided, however, that if an Event of Default shall have occurred and be continuing, if
Arch Coal does not execute any such instrument within 15 days after request therefor, the
Trustees shall be empowered as an attorney-in-fact for Arch Coal to execute any such
instrument in Arch Coal’s name and stead. In case any separate or co-trustee or a successor
to either shall die, become incapable or acting, resign or be removed, all the estates,
properties, rights, powers, trusts, duties and obligations of such separate or co-trustee, so
far as permitted by law, shall vest in and be exercised by the Trustee until the appointment
of a new trustee or successor to such separate or co-trustee.

     (d) Each separate trustee and co-trustee shall, to the extent permitted by law, be
appointed and act subject to the following provisions and conditions:

          (1) all rights and powers, conferred or imposed upon the Trustee shall be conferred
or imposed upon and may be exercised or performed by such separate trustee or co-trustee;
and

          (2) no trustee hereunder shall be personally liable by reason of any act or omission
of any other trustee hereunder.

     (e) Any notice, request or other writing given to the Trustee shall be deemed to have
been given to each of the then separate trustees and co-trustees, as effectively as if given
to each of them. Every instrument appointing any separate trustee or co-trustee shall refer
to this Indenture and the conditions of this Article Seven.

     (f) Any separate trustee or co-trustee may at any time appoint the Trustee as its agent
or attorney-in-fact with full power and authority, to the extent not prohibited by law, to do
any lawful act under or in respect of this Indenture on its behalf and in its name. If any
separate trustee or co-trustee shall die, become incapable of acting, resign or be removed,
all of its estates, properties, rights, remedies and trusts shall vest in and be exercised by
the Trustee, to the extent permitted by law, without the appointment of a new or successors
trustee.

ARTICLE EIGHT

DEFEASANCE; SATISFACTION AND DISCHARGE

               SECTION 8.01. Arch Coal’s Option to Effect Defeasance or Covenant Defeasance. Arch
Coal may, at its option by a resolution of the Boards of Directors, at any time,

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with respect to the Notes, elect to have either Section 8.02 or 8.03 be applied to outstanding
Notes upon compliance with the conditions set forth below this Article Eight.

     SECTION 8.02. Defeasance and Discharge(1) . Upon Arch Coal’s exercise under
Section 8.01 of the option applicable to this Section 8.02, Arch Coal shall be deemed to
have been discharged from its obligations with respect to the Notes on the date the
conditions set forth in Section 8.04 are satisfied (hereinafter, “legal
defeasance”). For this purpose, such legal defeasance means that Arch Coal shall be
deemed to have paid and discharged the entire indebtedness represented by the Notes and
to have satisfied all its other obligations under the Notes and this Indenture (and the
Trustee, at the expense of Arch Coal, shall execute proper instruments acknowledging the
same), except for the following which shall survive until otherwise terminated or
discharged hereunder: (a) the rights of Holders of Notes to receive, solely from the
trust fund described in Section 8.08 and as more fully set forth in such Section,
payments in respect of the principal of (and premium, if any, on) and interest on such
Notes when such payments are due, (b) the provisions set forth in Section 8.06 below and
(c) the rights, powers, trusts, duties and immunities of the Trustee hereunder. Subject
to compliance with this Article Eight, Arch Coal may exercise its option under this
Section 8.02 notwithstanding the prior exercise of its option under Section 8.03 below
with respect to the Notes. If Arch Coal exercises its legal defeasance option, payment
of the Notes may not be accelerated because of an Event of Default

          SECTION 8.03. Covenant Defeasance(a) . Upon Arch Coal’s exercise under
Section 8.01 of the option applicable to this Section 8.03, Arch Coal shall be released from
its obligations under any covenant contained in Sections 4.04 through 4.15, 4.17 (other than
the covenants to comply with TIA Section 314(a) to the extent that such obligations thereunder
cannot be terminated), 5.01(b)(4) and 6.01(a)(iv), (v), (vi) and (vii) (only with respect to
Significant Subsidiaries) with respect to the Notes on and after the date the conditions set
forth below are satisfied (hereinafter, “covenant defeasance”). For this purpose,
such covenant defeasance means that, Arch Coal may omit to comply with and shall have no
liability in respect of any term, condition or limitation set forth in any such covenant,
whether directly or indirectly, by reason of any reference elsewhere herein to any such
covenant or by reason of any reference in any such covenant to any other provision herein or
in any other document and such omission to comply shall not constitute a Default or an Event
of Default, but except as specified above, the remainder of this Indenture and such Notes
shall be unaffected thereby.

               SECTION 8.04. Conditions to Defeasance. The legal defeasance option or the covenant
defeasance option may be exercised only if:

     (a) Arch Coal irrevocably deposits in trust with the Trustee money or U.S. Government
Obligations for the payment of principal of, premium, if any, and interest on the Notes to
maturity or redemption, as the case may be;

     (b) Arch Coal delivers to the Trustee a certificate from a nationally recognized firm of
independent certified public accountants expressing their opinion that the payments of

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principal, premium, if any, and interest when due and without reinvestment on the
deposited U.S. Government Obligations plus any deposited money without investment will provide
cash at such times and in such amounts as will be sufficient to pay principal, premium, if
any, and interest when due on all the Notes to be defeased to maturity or redemption, as the
case may be;

     (c) 123 days pass after the deposit is made, and during the 123-day period, no Default
described in Section 6.01(a)(vii) and (viii) occurs with respect to Arch Coal or any other
Person making such deposit which is continuing at the end of the period;

     (d) no Default or Event of Default has occurred and is continuing on the date of such
deposit and after giving effect thereto;

     (e) such deposit does not constitute a default under any other agreement or instrument
binding on Arch Coal or any of its Restricted Subsidiaries;

     (f) Arch Coal delivers to the Trustee an Opinion of Counsel to the effect that the trust
resulting from the deposit does not constitute, or is qualified as, a regulated investment
company under the Investment Company Act of 1940;

     (g) in the case of the legal defeasance option, Arch Coal delivers to the Trustee an
Opinion of Counsel stating that:

          (1) Arch Coal has received from the Internal Revenue Service a ruling, or

          (2) since the date of this Indenture there has been a change in the applicable
Federal income tax law, to the effect that, and based thereon such Opinion of Counsel
shall confirm that, the Holders of the Notes will not recognize income, gain or loss for
Federal income tax purposes as a result of such defeasance and will be subject to Federal
income tax on the same amounts, in the same manner and at the same time as would have
been the case if such defeasance has not occurred;

     (h) in the case of the covenant defeasance option, Arch Coal delivers to the Trustee an
Opinion of Counsel to the effect that the Holders of the Notes will not recognize income, gain
or loss for Federal income tax purposes as a result of such covenant defeasance and will be
subject to Federal income tax on the same amounts, in the same manner and at the same times as
would have been the case if such covenant defeasance had not occurred; and

          (1) Arch Coal delivers to the Trustee an Officers’ Certificate and an Opinion of
Counsel, each stating that all conditions precedent to the defeasance and discharge of
the Notes have been complied with as required by this Article Eight.

               SECTION 8.05. Satisfaction and Discharge of Indenture. The Indenture will be
discharged and will cease to be of further effect as to all Notes issued thereunder, when

          (1) either:

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	 	(A)	 	all Notes that have been authenticated (except
lost, stolen or destroyed Notes that have been replaced or paid and
Notes for whose payment money has theretofore been deposited in trust
and thereafter repaid to Arch Coal) have been delivered to the Trustee
for cancellation; or
	 
	 	(B)	 	all Notes that have not been delivered to the
Trustee for cancellation are to be called for redemption within one
year and an irrevocable notice of redemption with respect thereto has
been deposited with the Trustee or will become due and payable within
one year and Arch Coal or a Guarantor has irrevocably deposited or
caused to be deposited with the Trustee as trust funds in trust solely
for the benefit of the Holders, cash in U.S. dollars, U.S. Government
Obligations, or a combination thereof, in such amounts as will be
sufficient without consideration of any reinvestment of interest, to
pay and discharge the entire indebtedness on the Notes not delivered to
the Trustee for cancellation for principal, premium, if any, and
accrued interest to the date of maturity or redemption;

          (2) no Default or Event of Default will have occurred and be continuing on the date
of such deposit or will occur as a result of such deposit and such deposit will not
result in a breach or violation of, or constitute a default under, any other instrument
to which Arch Coal or any Guarantor is a party or by which Arch Coal or any Guarantor is
bound;

          (3) Arch Coal or any Guarantor has paid or caused to be paid all sums payable by it
under the Indenture; and

          (4) Arch Coal has delivered irrevocable instructions to the Trustee under the
Indenture to apply the deposited money toward the payment of the Notes at maturity or the
redemption date, as the case may be.

In addition, Arch Coal must deliver an Officers’ Certificate and an Opinion of Counsel to the
Trustee stating that all conditions precedent to satisfaction and discharge have been satisfied.

               SECTION 8.06. Survival of Certain Obligations. Notwithstanding Sections 8.01 and
8.05, any obligations of Arch Coal and the Guarantors in Sections 2.02 through 2.14, 6.07, 7.07,
7.08, and 8.07 through 8.09 shall survive until the Notes have been paid in full. Thereafter, any
obligations of Arch Coal and the Guarantors in Sections 7.07, 8.07 and 8.08 shall survive such
satisfaction and discharge. Nothing contained in this Article Eight shall abrogate any of the
obligations or duties of the Trustee under this Indenture.

               SECTION 8.07. Acknowledgment of Discharge by Trustee. Subject to Section 8.09, after
the conditions of Section 8.01 or 8.04 have been satisfied, the Trustee upon written request shall
acknowledge in writing the discharge of all of Arch Coal’s obligations under this Indenture except
for those surviving obligations specified in this Article Eight.

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               SECTION 8.08. Application of Trust Money. Subject to Section 8.09, the Trustee shall
hold in trust cash in U.S. Dollars or U.S. Government Obligations deposited with it pursuant to
this Article Eight. It shall apply the deposited cash or U.S. Dollars or U.S. Government
Obligations through the Paying Agent and in accordance with this Indenture to the payment of
principal of, premium, if any, interest, on the Notes; but such money need not be segregated from
other funds except to the extent required by law.

               SECTION 8.09. Repayment to Arch Coal. Subject to Sections 7.07, and 8.01 through
8.06, the Trustee and the Paying Agent shall promptly pay to Arch Coal upon request set forth in an
Officers’ Certificate any excess money held by them at any time and thereupon shall be relieved
from all liability with respect to such money. The Trustee and the Paying Agent shall pay to Arch
Coal upon request any money held by them for the payment of principal, premium, if any, that
remains unclaimed for two years; provided that the Trustee or Paying Agent before being required to
make any payment may cause to be published (a) in The Wall Street Journal or another leading
newspaper in New York, New York, (b) through the newswire service of Bloomberg or, if Bloomberg
does not then operate, any similar agency or mail to each Holder entitled to such money at such
Holder’s address (as set forth in the Security Register) notice that such money remains unclaimed
and that after a date specified therein (which shall be at least 30 days from the date of such
publication or mailing) any unclaimed balance of such money then remaining will be repaid to Arch
Coal. After payment to Arch Coal, Holders entitled to such money must look to Arch Coal for
payment as general creditors unless an applicable law designates another Person, and all liability
of the Trustee and such Paying Agent with respect to such money shall cease.

               SECTION 8.10. Indemnity for Government Securities. Arch Coal shall pay and shall
indemnify the Trustee against any tax, fee or other charge imposed on or assessed against deposited
U.S. Government Obligations or the principal, premium, if any, interest, if any, received on such
U.S. Government Obligations.

               SECTION 8.11. Reinstatement. If the Trustee or Paying Agent is unable to apply cash
in U.S. Dollars or U.S. Government Obligations in accordance with this Article Eight by reason of
any legal proceeding or by reason of any order or judgment of any court or governmental authority
enjoining, restraining or otherwise prohibiting such application, Arch Coal’s and the Guarantors’
obligations under this Indenture and the Notes shall be revived and reinstated as though no deposit
had occurred pursuant to this Article Eight until such time as the Trustee or any such Paying Agent
is permitted to apply all such U.S. Government Obligations in accordance with this Article Eight;
provided, however, that, if Arch Coal has made any payment of principal of, premium, if any, and
interest, if any, on any Notes because of the reinstatement of its obligations, Arch Coal shall be
subrogated to the rights of the Holders of such Notes to receive such payment from the cash in U.S.
Dollars or U.S. Government Obligations held by the Trustee or Paying Agent.

ARTICLE NINE

AMENDMENTS AND WAIVERS

               SECTION 9.01. Without Consent of Holders. Arch Coal, when authorized by a resolution
of the Board of Directors (as evidenced by the delivery of such resolution to the

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Trustee), any Guarantor and the Trustee may modify, amend or supplement this Indenture, any
Guarantee or the Notes without notice to or consent of any Holder to:

     (a) cure any ambiguity, omission, defect or inconsistency in any manner that is not
adverse in any material respect to any Holder of the Notes;

     (b) provide for the assumption by a Surviving Person of the obligations of Arch Coal
under this Indenture;

     (c) provide for uncertificated Notes in addition to or in place of certificated Notes
(provided that the uncertificated Notes are issued in registered form for purposes of
Section 163(f) of the Code, or in a manner such that the uncertificated Notes are described in
Section 163 (f) (2) (B) of the Code);

     (d) add Note Guarantees with respect to the Notes or confirm and evidence the release,
termination or discharge of any security or Note Guarantee when such release, termination or
discharge is permitted by this Indenture;

     (e) secure the Notes, add to the covenants of Arch Coal and the Restricted Subsidiaries
for the benefit of the Holders of the Notes or surrender any right or power conferred upon
Arch Coal;

     (f) make any change that does not adversely affect the rights of any Holder of the Notes;

     (g) comply with any requirement of the Commission in connection with the qualification of
this Indenture under the Trust Indenture Act; or

     (h) provide for the issuance of Additional Notes in accordance with this Indenture.

               SECTION 9.02. With Consent of Holders. (a) Except as provided in Section 9.02(b)
below and Section 6.04 and without prejudice to Section 9.01, Arch Coal and the Trustee may:

          (i) amend this Indenture, the Notes, or the Note Guarantees; or

          (ii) waive compliance by Arch Coal with any provision of this Indenture or the Notes;

with the written consent of the Holders of at least a majority in aggregate principal amount of the
Notes then outstanding including consents obtained in connection with a tender offer or in exchange
for the Notes.

     (b) Without the consent of each Holder affected thereby, no amendment, modification,
supplement or waiver, including a waiver pursuant to Section 6.04 and an amendment,
modification or supplement pursuant to Section 9.01, may:

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     (i) reduce the amount of Notes whose Holders must consent to an amendment or waiver;

     (ii) reduce the rate of, or extend the time for payment of, interest on any Note;

     (iii) reduce the principal of, or extend the Stated Maturity of, any Note;

     (iv) make any Note payable in money other than that stated in the Note;

     (v) impair the right of any Holder of the Notes to receive payment of principal of,
premium, if any, and interest, on, such Holder’s Notes on or after the due dates therefor or
to institute suit for the enforcement of any payment on or with respect to such Holder’s
Notes;

     (vi) reduce the premium payable upon the redemption of any Note or change the time at
which any Note may be redeemed, pursuant to Section 3.01 of this Indenture;

     (vii) reduce the premium payable upon a Change of Control or, at any time after a
Change of Control has occurred, change the time at which the Change of Control Offer
relating thereto must be made or at which the Notes must be repurchased pursuant to such
Change of Control Offer;

     (viii) at any time after Arch Coal is obligated to make a Prepayment Offer with the
Excess Proceeds from Asset Sales, change the time at which such Prepayment Offer must be
made or at which the Notes must be repurchased pursuant thereto;

     (ix) modify or change any provision of this Indenture affecting the ranking of the
Notes or the Note Guarantees in a manner adverse to the Trustee or the Holders of the Notes;
or

     (x) release any Guarantor from any of its obligations under its Note Guarantee or this
Indenture other than in accordance with the provisions of this Indenture, or amend or modify
any provision relating to such release.

       The consent of the Holders of the Notes is not necessary to approve the particular form of any
proposed amendment. It is sufficient if such consent approves the substance of the proposed
amendment. After an amendment becomes effective, Arch Coal shall mail to each registered Holder of
the Notes at such Holder’s address appearing in the Security Register a notice briefly describing
such amendment. However, the failure to give such notice to all Holders of the Notes, or any
defect therein, will not impair or affect the validity of the amendment.

               SECTION 9.03. Compliance with Trust Indenture Act. Every amendment, modification or
supplement to this Indenture or the Notes shall be set forth in a supplemental indenture that
complies with the TIA as then in effect.

               SECTION 9.04. Effect of Supplemental Indentures. Upon the execution of any
supplemental indenture under this Article Nine, this Indenture shall be modified in accordance
therewith, and such supplemental indenture shall form a part of this Indenture for all

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purposes; and every Holder theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby.

               SECTION 9.05. Notation on or Exchange of Notes. If an amendment, modification or
supplement changes the terms of a Note, Arch Coal or Trustee may require the Holder to deliver it
to the Trustee. The Trustee may place an appropriate notation on the Note and on any Note
subsequently authenticated regarding the changed terms and return it to the Holder. Alternatively,
if Arch Coal so determines, Arch Coal in exchange for the Note shall issue and the Trustee shall
authenticate a new Note that reflects the changed terms. Failure to make the appropriate notation
or to issue a new Note shall not affect the validity of such amendment, modification or supplement.

               SECTION 9.06. Payment for Consent. Arch Coal will not, and will not permit any of its
Subsidiaries to, directly or indirectly, pay or cause to be paid any consideration, whether by way
of interest, fee or otherwise, to any Holder of any Notes for or as an inducement to any consent,
waiver or amendment of any of the terms or provisions of the Indenture or the Notes unless such
consideration is offered to be paid or is paid to all Holders of the Notes that consent, waive or
agree to amend in the time frame set forth in the solicitation documents relating to such consent,
waiver or agreement.

               SECTION 9.07. Notice of Amendment or Waiver. Promptly after the execution by Arch
Coal and the Trustee of any supplemental indenture or waiver pursuant to the provisions of
Section 9.02, Arch Coal shall give notice thereof to the Holders of each outstanding Note affected,
in the manner provided for in Section 12.02(b), setting forth in general terms the substance of
such supplemental indenture or waiver.

               SECTION 9.08. Trustee to Sign Supplemental Indentures. In executing any supplemental
indenture, the Trustee shall be entitled to receive indemnity reasonably satisfactory to it and to
receive and shall be fully protected in relying upon, in addition to the documents required by
Section 12.04, an Officers’ Certificate and an Opinion of Counsel stating that such supplemental
indenture is authorized or permitted by this Indenture and that all conditions precedent to the
execution, delivery and performance of such supplemental indenture have been satisfied.

     The Trustee shall sign all supplemental indentures that comply with the requirements of this
Indenture, except that the Trustee may, but need not, sign any supplemental indenture that
adversely affects its rights.

ARTICLE TEN

GUARANTEE

               SECTION 10.01. Note Guarantee. (a) Each Guarantor hereby fully and unconditionally
guarantees, on an unsecured, senior, joint and several basis with each other Note Guarantee, to
each Holder and to the Trustee and its successors and assigns on behalf of each Holder, the full
payment of principal of, premium, if any, interest, if any, and all other monetary obligations of
Arch Coal under this Indenture and the Notes (including obligations to the Trustee) with respect to
each Note authenticated and delivered by the Trustee or its agent

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pursuant to and in accordance with this Indenture, in accordance with the terms of this
Indenture (all the foregoing being hereinafter collectively called the “Obligations”). Each
Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part,
without notice or further assent from such Guarantor and that such Guarantor will remain bound
under this Article Ten notwithstanding any extension or renewal of any Obligation. All payments
under such Guarantee will be made in U.S. Dollars.

     (b) Each Guarantor hereby agrees that its obligations hereunder shall be as if they were
the principal debtor and not merely surety, unaffected by, and irrespective of, any validity,
irregularity or unenforceability of any Note or this Indenture, any failure to enforce the
provisions of any Note or this Indenture, any waiver, modification or indulgence granted to
Arch Coal with respect thereto by the Holders or the Trustee, or any other circumstance which
may otherwise constitute a legal or equitable discharge of a surety or guarantor (except
payment in full); provided, however, that, notwithstanding the foregoing, no such waiver,
modification, indulgence or circumstance shall without the written consent of the Guarantor
increase the principal amount of a Note or the interest rate thereon or change the currency of
payment with respect to any Note, or alter the Stated Maturity thereof. Each Guarantor hereby
waives diligence, presentment, demand of payment, filing of claims with a court in the event
of merger or bankruptcy of Arch Coal, any right to require that the Trustee pursue or exhaust
its legal or equitable remedies against Arch Coal prior to exercising its rights under the
Guarantee (including, for the avoidance of doubt, any right which the Guarantor may have to
require the seizure and sale of the assets of Arch Coal to satisfy the outstanding principal
of, interest on or any other amount payable under each Note prior to recourse against the
Guarantor or its assets), protest or notice with respect to any Note or the Debt evidenced
thereby and all demands whatsoever, and covenants that the Guarantee will not be discharged
with respect to any Note except by payment in full of the principal thereof and interest
thereon or as otherwise provided in this Indenture, including Section 10.03. If at any time
any payment of principal of, premium, if any, and interest, if any, on such Note is rescinded
or must be otherwise restored or returned upon the insolvency, bankruptcy or reorganization of
Arch Coal, the Guarantor’s obligations hereunder with respect to such payment shall be
reinstated as of the date of such rescission, restoration or returns as though such payment
had become due but had not been made at such times.

     (c) The Guarantor also agrees to pay any and all costs and expenses (including reasonable
attorneys’ fees) incurred by the Trustee or any Holder in enforcing any rights under this
Section 10.01.

               SECTION 10.02. Subrogation. (a) The Guarantor shall be subrogated to all rights of
the Holders against Arch Coal in respect of any amounts paid to such Holders by the Guarantor
pursuant to the provisions of its Guarantee.

     (b) The Guarantor agrees that it shall not be entitled to any right of subrogation in
relation to the Holders in respect of any Obligations guaranteed hereby until payment in full
of all Obligations. The Guarantor further agrees that, as between themselves, on the

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one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the
Obligations guaranteed hereby may be accelerated as provided in Section 6.02 for the purposes
of their Guarantee herein, notwithstanding any stay, injunction or other prohibition
preventing such acceleration in respect of the Obligations guaranteed hereby, and (y) in the
event of any declaration of acceleration of such obligations as provided in Section 6.02, such
Obligations (whether or not due and payable) shall forthwith become due and payable by the
Guarantor for the purposes of this Section 10.02 subject to Section 10.01(b) above.

          SECTION 10.03. Release of Guarantors(a) . The Guarantee of any Guarantor will be
automatically and unconditionally released and discharged upon any of the following:

     (a) in the event of a sale or other disposition, by way of merger, consolidation or
otherwise, of the Capital Stock of any Guarantor, after which the applicable Guarantor is no
longer a Restricted Subsidiary, such Guarantor will be released and relieved of any
obligations under its Guarantee; provided that the Net Available Cash from such sale or other
disposition is applied in accordance with the applicable provisions of Section 4.09 of this
Indenture;

     (b) upon the release or discharge of the Guarantee of the Credit Agreement or the
Guarantee of a Guarantor that resulted in the creation of the Note Guarantee of such
Guarantor, except a discharge or release by or as a result of payment under such other
Guarantee pursuant to Section 4.13, such Guarantor will be released and relieved of any
obligations under its Note Guarantee;

     (c) upon the designation of any Guarantor as an Unrestricted Subsidiary in accordance
with the terms of this Indenture, such Guarantor will be released and relieved of any
obligations under its Note Guarantee; and

     (d) and in each such case, prior to release and discharge or such Note Guarantee, Arch
Coal will have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel,
each stating that all conditions precedent herein provided for relating to such transactions
have been complied with and that such release is authorized and permitted hereunder.

     The Trustee shall execute any documents reasonably requested by either Arch Coal or a
Guarantor in order to evidence the release of such Guarantor from its obligations under its
Guarantee endorsed on the Notes and under this Article Ten.

               SECTION 10.04. Additional Guarantors. Arch Coal covenants and agrees that it shall
cause any Person which becomes obligated to Guarantee the Notes, pursuant to the terms of
Section 4.13, to execute a supplemental indenture and any other documentation requested by the
Trustee satisfactory in form and substance to the Trustee in accordance with Section 4.13 pursuant
to which such Restricted Subsidiary shall Guarantee the obligations of Arch Coal under the Notes
and this Indenture in accordance with this Article Ten with the same effect and to the same extent
as if such Person had been named herein as a Guarantor.

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               SECTION 10.05. Limitation of Guarantee. The Guarantee is limited in an amount not to
exceed the maximum amount that can be guaranteed by the Guarantor without rendering such Guarantee,
as it relates to the Guarantor, voidable under applicable law relating to fraudulent conveyance or
fraudulent transfer of similar laws affecting the rights of the creditors generally.

               SECTION 10.06. Notation Not Required. Neither Arch Coal nor the Guarantor shall be
required to make a notation on the Notes to reflect any Guarantee or any release, termination or
discharge thereof.

               SECTION 10.07. Successors and Assigns. This Article Ten shall be binding upon the
Guarantor and each of their successors and assigns and shall inure to the benefit of the successors
and assigns of the Trustee and the Holders and, in the event of any transfer or assignment of
rights by any Holder or the Trustee, the rights and privileges conferred upon that party in this
Indenture and in the Notes shall automatically extend to and be vested in such transferee or
assigns, all subject to the terms and conditions of this Indenture.

               SECTION 10.08. No Waiver. Neither a failure nor a delay on the part of either the
Trustee or the Holders in exercising any right, power or privilege under this Article Ten shall
operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or
further exercise of any right, power or privilege. The rights, remedies and benefits of the
Trustee and the Holders herein expressly specified are cumulative and are not exclusive of any
other rights, remedies or benefits which either may have under this Article Ten at law, in equity,
by statute or otherwise.

               SECTION 10.09. Modification. No modification, amendment or waiver of any provision of
this Article Ten, nor the consent to any departure by the Guarantor therefrom, shall in any event
be effective unless the same shall be in writing and signed by the Trustee, and then such waiver or
consent shall be effective only in the specific instance and for the purpose for which given. No
notice to or demand on the Guarantor in any case shall entitle the Guarantor to any other or
further notice or demand in the same, similar or other circumstance.

ARTICLE ELEVEN

HOLDERS’ MEETINGS

               SECTION 11.01. Purposes of Meetings. A meeting of the Holders may be called at any
time pursuant to this Article Twelve for any of the following purposes:

     (a) to give any notice to Arch Coal or any Guarantor or to the Trustee, or to give any
directions to the Trustee, or to consent to the waiving of any Default hereunder and its
consequences, or to take any other action authorized to be taken by Holders pursuant to
Article Nine;

     (b) to remove the Trustee and appoint a successor trustee pursuant to Article Seven; or

     (c) to consent to the execution of an indenture supplement pursuant to Section 9.02.

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               SECTION 11.02. Place of Meetings. Meetings of Holders may be held at such place or
places as the Trustee or, in case of its failure to act, Arch Coal, any Guarantor or the Holders
calling the meeting, shall from time to time determine.

               SECTION 11.03. Call and Notice of Meetings. (a) The Trustee may at any time (upon
not less than 21 days’ notice) call a meeting of Holders to be held at such time and at such place
in St. Louis, Missouri or in such other city as determined by the Trustee pursuant to
Section 11.02. Notice of every meeting of Holders, setting forth the time and the place of such
meeting and in general terms the action proposed to be taken at such meeting, shall be mailed to
each Holder and published in the manner contemplated by Section 12.02(b).

     (b) In case at any time Arch Coal, pursuant to a resolution of the Board of Directors, or
the Holders of at least 10% in aggregate principal amount at maturity of the Notes then
outstanding, shall have requested the Trustee to call a meeting of the Holders, by written
request setting forth in reasonable detail the action proposed to be taken at the meeting, and
the Trustee shall not have made the first giving of the notice of such meeting within 20 days
after receipt of such request, then Arch Coal or the Holders of Notes in the amount above
specified may determine the time (not less than 21 days after notice is given) and the place
in St. Louis, Missouri or in such other city as determined by Arch Coal or the Holders
pursuant to Section 11.02 for such meeting and may call such meeting to take any action
authorized in Section 11.01 by giving notice thereof as provided in Section 11.01(a).

               SECTION 11.04. Voting at Meetings. To be entitled to vote at any meeting of Holders,
a Person shall be (i) a Holder at the relevant Record Date set in accordance with Section 6.15 or
(ii) a Person appointed by an instrument in writing as proxy for a Holder or Holders by such Holder
or Holders. The only Persons who shall be entitled to be present or to speak at any meeting of
Holders shall be the Person so entitled to vote at such meeting and their counsel and any
representatives of the Trustee and its counsel and any representatives of Arch Coal and any
Guarantor and their counsel.

               SECTION 11.05. Voting Rights, Conduct and Adjournment. (a) Notwithstanding any other
provisions of this Indenture, the Trustee may make such reasonable regulations as it may deem
advisable for any meeting of Holders in regard to proof of the holding of Notes and of the
appointment of proxies and in regard to the appointment and duties of inspectors of votes, the
submission and examination of proxies, certificates and other evidence of the right to vote, and
such other matters concerning the conduct of the meeting as it shall deem appropriate. Except as
otherwise permitted or required by any such regulations, the holding of Notes shall be proved in
the manner specified in Section 2.03 and the appointment of any proxy shall be proved in such
manner as is deemed appropriate by the Trustee or by having the signature of the Person executing
the proxy witnessed or guaranteed by any bank, banker or trust company customarily authorized to
certify to the holding of a Note such as a Global Note.

     (b) At any meeting of Holders, the presence of Persons holding or representing Notes in
an aggregate principal amount at Stated Maturity sufficient under the appropriate provision of
this Indenture to take action upon the business for the transaction of which such meeting was
called shall constitute a quorum. Subject to any required aggregate principal amount at
Stated Maturity of Notes required for the taking of any action pursuant

94

 

to Article Nine, in no event shall less than a majority of the votes given by Persons
holding or representing Notes at any meeting of Holders be sufficient to approve an action.
Any meeting of Holders duly called pursuant to Section 11.03 may be adjourned from time to
time by vote of the Holders (or proxies for the Holders) of a majority of the Notes
represented at the meeting and entitled to vote, whether or not a quorum shall be present; and
the meeting may be held as so adjourned without further notice. No action at a meeting of
Holders shall be effective unless approved by Persons holding or representing Notes in the
aggregate principal amount at Stated Maturity required by the provision of this Indenture
pursuant to which such action is being taken.

     (c) At any meeting of Holders, each Holder or proxy shall be entitled to one vote for
each $1,000 aggregate principal amount at Stated Maturity of outstanding Notes held or
represented.

               SECTION 11.06. Revocation of Consent by Holders at Meetings. At any time prior to
(but not after) the evidencing to the Trustee of the taking of any action at a meeting of Holders
by the Holders of the percentage in aggregate principal amount at maturity of the Notes specified
in this Indenture in connection with such action, any Holder of a Note the serial number of which
is included in the Notes the Holders of which have consented to such action may, by filing written
notice with the Trustee at its principal Corporate Trust Office and upon proof of holding as
provided herein, revoke such consent so far as concerns such Note. Except as aforesaid, any such
consent given by the Holder of any Note shall be conclusive and binding upon such Holder and upon
all future Holders and owners of such Note and of any Note issued in exchange therefor, in lieu
thereof or upon transfer thereof, irrespective of whether or not any notation in regard thereto is
made upon such Note. Any action taken by the Holders of the percentage in aggregate principal
amount at maturity of the Notes specified in this Indenture in connection with such action shall be
conclusively binding upon Arch Coal, the Guarantors, the Trustee and the Holders. This
Section 11.06 shall not apply to revocations of consents to amendments, supplements or waivers,
which shall be governed by the provisions of Section 9.04.

ARTICLE TWELVE

MISCELLANEOUS

               SECTION 12.01. Trust Indenture Act Controls. If and to the extent that any provision
of this Indenture limits, qualifies or conflicts with the duties imposed by, or with another
provision (an “incorporated provision”) included in this Indenture by operation of,
Sections 310 to 318, inclusive, of the TIA incorporated hereto in accordance with Section 1.03
hereto, such imposed duties or incorporated provision shall control.

               SECTION 12.02. Notices. (a) Any notice or communication shall be in writing and
delivered in person or mailed by first class mail or sent by facsimile transmission addressed as
follows:

if to Arch Coal, Inc. or any Guarantor:

Arch Coal, Inc.

One CityPlace Drive

95

 

Suite 300

St. Louis, Missouri 63141

Telephone: 1-800-238-7398

Facsimile: 314-994-2734

Attention: General Counsel

With copies to:

K&L Gates LLP

Henry W. Oliver Building

535 Smithfield Street 

Pittsburgh, PA 15222

Attention: Ronald West

if to the Trustee:

U.S. Bank National Association

One U.S. Bank Plaza

St. Louis, Missouri 63101

Telephone: 314-418-3943

Facsimile: 314-418-1225

Attention: Corporate Trust Department

       Arch Coal, the Guarantors or the Trustee by notice to the other may designate additional or
different addresses for subsequent notices or communications. All communications delivered to the
Trustee shall be deemed effective when received.

     (b) Notices to the Holders regarding the Notes shall be mailed to each Holder by
first-class mail at such Holder’s respective address as it appears on the registration books
of the Registrar.

       Notices given by first-class mail shall be deemed given five calendar days after mailing.
Failure to mail a notice or communication to a Holder or any defect in it shall not affect its
sufficiency with respect to other Holders. If a notice or communication is mailed in the manner
provided above, it is duly given, whether or not the addressee receives it.

     (c) Where this Indenture provides for notice in any manner, such notice may be waived in
writing by the Person entitled to receive such notice, either before or after the event, and
such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be
filed with the Trustee, but such filing shall not be a condition precedent to the validity of
any action taken in reliance upon such waiver.

               SECTION 12.03. Communication by Holders with Other Holders. Holders may communicate
pursuant to TIA Section 312(b) with other Holders with respect to their rights under this Indenture
or the Notes. Arch Coal, any Guarantor, the Trustee, the Registrar and anyone else shall have the
protection of TIA Section 312(c).

96

 

               SECTION 12.04. Certificate and Opinion as to Conditions Precedent. Upon any request
or application by Arch Coal or any Guarantor to the Trustee to take or refrain from taking any
action under this Indenture (except in connection with the original issuance of the Notes on the
date hereof), Arch Coal or any Guarantor, as the case may be, shall furnish upon request to the
Trustee:

     (a) an Officers’ Certificate in form reasonably satisfactory to the Trustee stating that,
in the opinion of the signer, all conditions precedent, if any, provided for in this Indenture
relating to the proposed action have been complied with; and

     (b) an Opinion of Counsel in form reasonably satisfactory to the Trustee stating that, in
the opinion of such counsel, all such conditions precedent have been complied with.

       Any Officers’ Certificate may be based, insofar as it relates to legal matters, upon an
Opinion of Counsel, unless the officer signing such certificate knows, or in the exercise of
reasonable care should know, that such Opinion of Counsel with respect to the matters upon which
such Officers’ Certificate is based are erroneous. Any Opinion of Counsel may be based and may
state that it is so based, insofar as it relates to factual matters, upon an Officers’ Certificate
stating that the information with respect to such factual matters is in the possession of Arch
Coal, unless the counsel signing such Opinion of Counsel knows, or in the exercise of reasonable
care should know, that the Officers’ Certificate with respect to the matters upon which such
Opinion of Counsel is based are erroneous.

               SECTION 12.05. Statements Required in Certificate or Opinion. Every certificate or
opinion with respect to compliance with a condition or covenant provided for in this
Indenture shall include:

     (a) a statement that each individual signing such certificate or opinion has read such
covenant or condition and the definitions herein relating thereto;

     (b) a brief statement as to the nature and scope of the examination or investigation upon
which the statements or opinions contained in such certificate or opinion are based;

     (c) a statement that, in the opinion of each such individual, he has made such
examination or investigation as is necessary to enable him to express an informed opinion as
to whether or not such covenant or condition has been complied with; and

     (d) a statement as to whether, in the opinion of each such individual, such condition or
covenant has been complied with.

               SECTION 12.06. Rules by Trustee, Paying Agent and Registrar. The Trustee may make
reasonable rules for action by or at a meeting of Holders. The Registrar and the Paying Agent may
make reasonable rules for their functions.

               SECTION 12.07. Legal Holidays. If an Interest Payment Date or other payment date is
not a Business Day, payment shall be made on the next succeeding day that is a Business Day, and no
interest shall accrue for the intervening period. If a Record Date is not a Business Day, the
Record Date shall not be affected.

97

 

               SECTION 12.08. Governing Law. THIS INDENTURE AND THE NOTES SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

               SECTION 12.09. No Recourse Against Others. A director, officer, employee or
shareholder, as such, of Arch Coal or any Guarantor shall not have any liability for any
obligations of Arch Coal or any Guarantor under the Notes, this Indenture or any Guarantee or for
any claim based on, in respect of or by reason of such obligations or their creation. By accepting
a Note, each Holder shall waive and release all such liability. The waiver and release shall be
part of the consideration for the issue of the Notes.

               SECTION 12.10. Successors. All agreements of Arch Coal and any Guarantor in this
Indenture and the Notes shall bind their respective successors. All agreements of the Trustee in
this Indenture shall bind its successors.

               SECTION 12.11. Multiple Originals. The parties may sign any number of copies of this
Indenture. Each signed copy shall be an original, but all of them together represent the same
agreement. One signed copy is enough to prove this Indenture.

               SECTION 12.12. Table of Contents, Cross-Reference Sheet and Headings. The table of
contents, cross-reference sheet and headings of the Articles and Sections of this Indenture have
been inserted for convenience of reference only, are not intended to be considered a part hereof
and shall not modify or restrict any of the terms or provisions hereof.

               SECTION 12.13. Severability. In case any provision in this Indenture or in the Notes
shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

     This Indenture may be signed in any number of counterparts each of which so executed shall be
deemed to be an original, but all such counterparts shall together constitute but one and the same
Indenture.

[SIGNATURE PAGES FOLLOW]

98

 

     IN WITNESS WHEREOF, the parties have caused this Indenture to be duly executed as of the date
first written above.

	 	 	 	 	 	 	 
	 	 	Arch Coal, Inc.	 	 
	 	 	as Issuer	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:
	 	/s/ John T. Drexler
 

John T. Drexler
	 	 
	 

	 	Title:
	 	Senior Vice President and Chief Financial
Officer	 	 
	 
	 	 	 	 	 	 
	 	 	Allegheny Land Company

As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Arch Coal Sales Company, Inc.

As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Arch Coal Terminal, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Arch Energy Resources, LLC	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 

Signature Page to Indenture

 

	 	 	 	 	 	 	 
	 	 	Arch Reclamation Services, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Ark Land Company	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Arch Land KH, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Arch Land LT, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Ark Land WR, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 

Signature Page to Indenture

 

	 	 	 	 	 	 	 
	 	 	Ashland Terminal, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Coal-Mac, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Cumberland River Coal Company

As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Lone Mountain Processing, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Mingo Logan Coal Company	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 

Signature Page to Indenture

 

	 	 	 	 	 	 	 
	 	 	Mountain Gem Land, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Mountain Mining, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Mountain Land Company

As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Prairie Holdings, Inc.

As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 
	 
	 	 	 	 	 	 
	 	 	Western Energy Resources, Inc.	 	 
	 	 	As Guarantor	 	 
	 
	 	 	 	 	 	 
	 

	 	By:

Name:

Title:
	 	/s/ John T. Drexler
 

John T. Drexler

Vice President
	 	 

Signature Page to Indenture

 

	 	 	 	 	 	 	 
	 	 	U.S. Bank National Association,

as Trustee	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	/s/ Peter C. Qui Belle	 	 
	 

	 	Name:
	 	 
Peter C. Qui
Belle
	 	 
	 

	 	Title:	 	Assistant Vice President	 	 

Signature Page to Indenture

 

EXHIBIT A

[FORM OF FACE OF NOTE]

     UNLESS THIS GLOBAL NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY, A NEW YORK CORPORATION (“DTC”), TO ARCH COAL OR ITS AGENT FOR REGISTRATION OF TRANSFER,
EXCHANGE, OR PAYMENT, AND ANY GLOBAL NOTE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NOMINEE AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC, ANY
TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL IN AS
MUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

     TRANSFERS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO
NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF
THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH
IN THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

     THIS GLOBAL NOTE AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO
TIME TO MODIFY THE RESTRICTIONS ON AND PROCEDURES FOR OR RESALES AND OTHER TRANSFERS OF THIS GLOBAL
NOTE TO REFLECT ANY CHANGE IN APPLICABLE LAW OR REGULATION (OR THE INTERPRETATION THEREOF) OR IN
PRACTICES RELATING TO THE RESALE OR TRANSFER OF RESTRICTED SECURITIES GENERALLY. THE HOLDER OF
THIS GLOBAL NOTE SHALL BE DEEMED, BY THE ACCEPTANCE HEREOF, TO HAVE AGREED TO ANY SUCH AMENDMENT OR
SUPPLEMENT.

     THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
“SECURITIES ACT”), OR ANY STATE SECURITIES LAWS. NEITHER THIS NOTE NOR ANY INTEREST OR
PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR
OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT
FROM, OR NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THE HOLDER OF THIS
NOTE BY ITS ACCEPTANCE HEREOF AGREES TO OFFER, SELL OR OTHERWISE TRANSFER SUCH NOTE, PRIOR TO THE
DATE WHICH IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON
WHICH ARCH COAL OR ANY AFFILIATE OF ARCH COAL WAS THE OWNER OF THIS NOTE (OR ANY PREDECESSOR OF
THIS NOTE) ONLY (A) TO ARCH COAL, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THE NOTES ARE ELIGIBLE FOR

 

 

RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT (“RULE 144A”), TO A PERSON IT REASONABLY
BELIEVES IS A “QUALIFIED INSTITUTIONAL BUYER” AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS OWN
ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE
TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (D) PURSUANT TO OFFERS AND SALES THAT OCCUR
OUTSIDE THE UNITED STATES IN COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT OR (E) PURSUANT
TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO
ARCH COAL’S AND THE TRUSTEE’S RIGHTS PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER (i) PURSUANT TO
CLAUSE (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION AND/OR OTHER INFORMATION
SATISFACTORY TO EACH OF THEM AND (ii) IN EACH OF THE FOREGOING CASES, TO REQUIRE THAT AN ASSIGNMENT
FORM IN THE FORM APPEARING ON THE OTHER SIDE OF THIS NOTE AND ANY OTHER CERTIFICATE REQUIRED UNDER
THE INDENTURE ARE COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE.

     EACH PURCHASER OF THIS GLOBAL NOTE OR ANY INTEREST HEREIN IS HEREBY NOTIFIED THAT THE SELLER
OF THIS GLOBAL NOTE MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

     THE HOLDER OF THIS GLOBAL NOTE IS SUBJECT TO, AND ENTITLED TO THE BENEFITS OF, THE
REGISTRATION RIGHTS AGREEMENT, DATED AS OF JULY 31, 2009 AMONG ARCH COAL, THE GUARANTORS AND THE
OTHER PARTIES REFERRED TO THEREIN.

     [[INCLUDE ONLY IF REGULATION S GLOBAL NOTE] UNTIL 40 DAYS AFTER THE COMMENCEMENT OF THE
OFFERING, AN OFFER OR SALE OF SECURITIES WITHIN THE UNITED STATES BY A DEALER (AS DEFINED IN THE
U.S. SECURITIES ACT) MAY VIOLATE THE REGISTRATION REQUIREMENTS OF THE U.S. SECURITIES ACT IF SUCH
OFFER OR SALE IS MADE OTHERWISE THAN IN ACCORDANCE WITH RULE 144A UNDER THE U.S. SECURITIES ACT.]

     [[INCLUDE ONLY IF REGULATION S GLOBAL NOTE] BY ITS ACQUISITION HEREOF, THE HOLDER HEREOF
REPRESENTS THAT IT IS NOT A U.S. PERSON, NOR IS IT PURCHASING FOR THE ACCOUNT OF A U.S. PERSON, AND
IS ACQUIRING THIS NOTE IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER THE
SECURITIES ACT.]

A-2

 

[If Restricted Global Note — CUSIP Number 039380 AA8/ISIN Number US039380AA89]

[If Regulation S Global Note — CUSIP Number U0393C AA3/ISIN Number USU0393CAA37]

[If Exchange Note — CUSIP Number [          ]/ISIN Number [          ]]

No.                     

8.750% SENIOR NOTE DUE 2016

     Arch Coal, Inc., Delaware corporation, for value received promises to pay to Cede & Co. or
registered assigns the principal sum of $                     (                    ) on August 1, 2016.

     From July 31, 2009, or from the most recent interest payment date to which interest has been
paid or provided for, cash interest on this Note will accrue at 8.750%, payable semiannually on
February 1 and August 1 of each year, beginning on February 1, 2010, to the Person in whose name
this Note (or any predecessor Note) is registered at the close of business on the preceding January
15 or July 15, as the case may be.

     THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

     Unless the certificate of authentication hereon has been executed by the Trustee referred to
on the reverse hereof by manual signature of an authorized signatory, this Note shall not be
entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

     Reference is hereby made to the further provisions of this Note set forth on the reverse
hereof and to the provisions of the Indenture, which provisions shall for all purposes have the
same effect as if set forth at this place.

A-3

 

     IN WITNESS WHEREOF, Arch Coal, Inc. has caused this Note to be signed manually or by facsimile
by its duly authorized signatory.

Dated: July 31, 2009

	 	 	 	 	 	 	 
	 	 	Arch Coal, Inc.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	Title:	 	 	 	 

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

U.S. BANK NATIONAL ASSOCIATION,

as Trustee, certifies that this is one of the Notes referred to in the Indenture.

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 

	 	Authorized Signatory	 	 

A-4

 

[FORM OF REVERSE SIDE OF NOTE]

8.750% Senior Note Due 2016

1. Interest

     Arch Coal, Inc., Delaware corporation, and its successors and assigns under the Indenture
hereinafter referred to, being herein called the “Arch Coal”, for value received promises
to pay interest on the principal amount of this Note from July 31, 2009 at the rate per annum shown
above. Interest will be computed on the basis of a 360-day year of twelve 30-day months. Arch Coal
will pay interest on overdue principal at the interest rate borne by the Notes compounded
semiannually, and it shall pay interest on overdue installments of interest at the same rate
compounded semiannually to the extent lawful. Any interest paid on this Note shall be increased to
the extent necessary to pay Special Interest as set forth in this Note.

2. Special Interest

     The Holder is entitled to the benefits of the Registration Rights Agreement dated July 31,
2009, among Arch Coal, Inc., a Delaware corporation (the “Company”), Allegheny Land Company, a
Delaware corporation, Arch Coal Sales Company, Inc., a Delaware corporation, Arch Coal Terminal,
Inc., a Delaware corporation, Arch Energy Resources, LLC, a limited liability company organized
under the laws of Delaware, Arch Reclamation Services, Inc., a Delaware corporation, Ark Land
Company, a Delaware corporation, Ark Land KH, Inc., a Delaware corporation, Ark Land LT, Inc., a
Delaware corporation, Ark Land WR, Inc., a Delaware corporation, Ashland Terminal, Inc., a Delaware
corporation, Coal-Mac, Inc., a Kentucky corporation, Cumberland River Coal Company, a Delaware
corporation, Lone Mountain Processing, Inc., a Delaware corporation, Mingo Logan Coal Company, a
Delaware corporation, Mountain Gem Land, Inc., a West Virginia corporation, Mountain Mining, Inc.,
a Delaware corporation, Mountaineer Land Company, a Delaware corporation, Prairie Holdings, Inc., a
Delaware corporation, Western Energy Resources, Inc., a Delaware corporation (collectively the
“Guarantors”) and the Initial Purchasers (the “Registration Rights Agreement”).

     In the event that (a) the Exchange Offer Registration Statement (as defined in the
Registration Rights Agreement) has not been declared effective within 365 days following the date
of the Indenture (or if such 365th day is not a Business Day, the next succeeding
Business Day), (b) the Registered Exchange Offer (as defined in the Registration Rights Agreement)
is not consummated within 410 days following the date of the Indenture (or, if such
410th day is not a Business Day, the next succeeding Business Day), or (c) a Shelf
Registration Statement (as defined in the Registration Rights Agreement) is required to be filed
pursuant to the terms of the Registration Rights Agreement but has not been declared effective
under the Securities Act within 410 days following the date of the Indenture (or, if such
410th day is not a Business Day, the next succeeding Business Day) (each event referred
to in clauses (a) through (c) above, a “Registration Deadline Event”), then Arch Coal will be
required to pay additional interest (“Special Interest”) in cash on February 1 and August 1 of each
year, commencing on the first such date following any Registration Deadline Event, at a rate per
annum equal to 0.25% of the principal amount of the Notes (determined daily) with respect to the
first 90-day period following such Registration Deadline Event. Such amount of Special Interest
shall increase by

A-5

 

an additional 0.25% per annum to a maximum of 1.00% per annum for each subsequent 90-day period
until such Registration Deadline Event has been cured. Upon the cure of any Registration Deadline
Event, Special Interest with respect to such event shall cease to accrue from the date of the
filing, effectiveness or consummation that cured such event, as the case may be, if Arch Coal and
the Guarantors are otherwise in compliance with this paragraph. However, if, after any such
Special Interest ceases to accrue, a different Registration Deadline Event occurs, Special Interest
will again accrue as described.

3. Method of Payment

     Arch Coal shall pay interest on this Note (except defaulted interest) to the persons who are
registered Holders of this Note at the close of business on the Record Date for the next Interest
Payment Date even if this Note is cancelled after the Record Date and on or before the Interest
Payment Date. Arch Coal shall pay principal and interest in U.S. Dollars in immediately available
funds that at the time of payment is legal tender for payment of public and private debts;
provided, however, that payment of interest may be made at the option of Arch Coal by check mailed
to the Holder.

     The amount of payments in respect of interest on each Interest Payment Date shall correspond
to the aggregate principal amount of Notes represented by the Restricted Global Note and the
Regulation S Global Note, as established by the Registrar at the close of business on the relevant
Record Date. Payments of principal shall be made upon surrender of the Restricted Global Note and
Regulation S Global Note to the Paying Agent.

4. Paying Agent and Registrar

     Initially, U.S. Bank National Association or one of its affiliates will act as Paying Agent
and Registrar. Arch Coal or any of its Affiliates incorporated in the United States may act as
Paying Agent, Registrar or co-Registrar, subject to the provisions of the Indenture.

5. Indenture

     Arch Coal issued the Notes under an indenture dated as of July 31, 2009 (the
“Indenture”), among Arch Coal, the Guarantors and U.S. Bank National Association, as
trustee (the “Trustee”). The terms of the Notes include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of 1939 as in effect on
the date of the Indenture and, to the extent required by any amendment after such date, as so
amended (the “Trust Indenture Act”). Terms defined in the Indenture and not defined herein
have the meanings ascribed thereto in the Indenture. The Notes are subject to all such terms, and
Holders are referred to the Indenture and the Trust Indenture Act for a statement of those terms.

     The Notes are unsecured senior guaranteed obligations of Arch Coal and are issued in an
initial aggregate principal amount $600,000,000. The Indenture imposes certain limitations on Arch
Coal, the Guarantors and their affiliates, including, without limitation, limitations on the
incurrence of indebtedness and issuance of stock, the payment of dividends and other payment
restrictions affecting Arch Coal and its subsidiaries, the sale of assets, transactions with and
among affiliates of Arch Coal and the Restricted Subsidiaries, change of control and Liens.

A-6

 

6. Optional Redemption

     Except pursuant to the next paragraphs, the Notes will not be redeemable at the option of Arch Coal
prior to August 1, 2013. Starting on that date, Arch Coal may redeem all or any portion of the
Notes, at once or over time, after giving the required notice under this Indenture at the
redemption prices set forth below, plus accrued and unpaid interest to the redemption date (subject
to the right of Holders of record on the relevant Record Date to receive interest, due on the
relevant interest payment date). The following prices are for Notes redeemed during the 12-month
period commencing on August 1, 2013 of the years set forth below, and are expressed as percentages
of principal amount:

	 	 	 	 	 
	 	 	Redemption
	Year	 	Price
	2013
	 	 	104.375	%
	2014
	 	 	102.188	%
	2015 and thereafter
	 	 	100.000	%

     In addition, at any time and from time to time, prior to August 1, 2012, Arch Coal may redeem
up to a maximum of 35% of the original aggregate principal amount of the Notes (calculated giving
effect to any issuance of Additional Notes) with the proceeds of one or more Public Equity
Offerings, at a redemption price equal to 108.750% of the principal amount thereof, plus accrued
and unpaid interest to the redemption date (subject to the right of Holders of record on the
relevant Record Date to receive interest due on the relevant interest payment date); provided,
however, that after giving effect to any such redemption, at least 65% of the original aggregate
principal amount of the Notes (calculated giving effect to any issuance of Additional Notes)
remains outstanding (excluding Notes held by Arch Coal or any of its Subsidiaries). Any such
redemption shall be made within 90 days of such Public Equity Offering upon not less than 30 nor
more than 60 days’ prior notice.

     Any redemption pursuant to this Section 6 shall be made pursuant to the provisions of this
Article Three.

7. Notice of Redemption

     Notice of redemption will be mailed first-class postage prepaid at least 30 days but not more
than 60 days before the Redemption Date to the Holder of this Note to be redeemed at the addresses
contained in the Security Register. If this Note is in a denomination larger than $2,000 of
principal amount it may be redeemed in part but only in integral multiples of $1,000. In the event
of a redemption of less than all of the Notes, the Notes for redemption will be chosen by the
Trustee in accordance with the Indenture. If this Note is redeemed subsequent to a Record Date with
respect to any Interest Payment Date specified above, then any accrued interest will be paid to the
Holder at the close of business on such Record Date. If money sufficient to pay the Redemption
Price of and accrued interest on all Notes (or portions thereof) to be redeemed on the Redemption
Date is deposited with the applicable Paying Agent on or before the Redemption Date and certain
other conditions are satisfied, interest ceases to accrue on such Notes (or such portions thereof)
called for redemption on or after such date.

A-7

 

8. Repurchase at the Option of Holders Upon a Change of Control

     Upon the occurrence of a Change of Control, Holders of Notes shall have the right to require
Arch Coal to repurchase all or any part of such Holder’s Notes pursuant to the offer described
below (the “Change of Control Offer”) at a purchase price (the “Change of Control Purchase Price”)
equal to 101% of the principal amount thereof, plus accrued and unpaid interest, to the repurchase
date (subject to the right of Holders of record on the relevant Record Date to receive interest due
on the relevant interest payment date). If the repurchase date is after a Record Date and on or
before the relevant interest payment date, the accrued and unpaid interest, if any, will be paid to
the person or entity in whose name the Note is registered at the close of business on that Record
Date, and no additional interest will be payable to Holders whose Notes shall be subject to
redemption.

     Within 30 days following any Change of Control, Arch Coal shall:

     (a) cause a notice of the Change of Control Offer to be sent at least once to the Dow
Jones News Service or similar business news service in the United States; and

     (b) send, by first-class mail, with a copy to the Trustee, to each Holder of Notes, at
such Holder’s address appearing in the Security Register, a notice stating:

     (1) that a Change of Control has occurred and a Change of Control Offer is being
made pursuant to Section 4.11 of the Indenture and that all Notes timely tendered will be
accepted for payment;

     (2) the Change of Control Purchase Price and the repurchase date, which shall be,
subject to any contrary requirements of applicable law, a business day no earlier than 30
days nor later than 60 days from the date such notice is mailed;

     (3) the circumstances and relevant facts regarding the Change of Control (including
information with respect to pro forma historical income, cash flow and capitalization
after giving effect to the Change of Control); and

     (4) the procedures that holders of Notes must follow in order to tender their Notes
(or portions thereof) for payment, and the procedures that holders of Notes must follow
in order to withdraw an election to tender Notes (or portions thereof) for payment.

     Arch Coal will not be required to make a Change of Control Offer following a Change of Control
if a third party makes the Change of Control Offer in the manner, at the times and otherwise in
compliance with the requirements set forth in the Indenture applicable to a Change of Control Offer
made by Arch Coal and purchases all Notes validly tendered and not withdrawn under such Change of
Control Offer.

     Arch Coal shall comply, to the extent applicable, with the requirements of Section 14(e) of
the Exchange Act and any other securities laws or regulations in connection with the repurchase of
Notes pursuant to a Change of Control Offer. To the extent that the provisions of any securities
laws or regulations conflict with the provisions of this covenant, Arch Coal will

A-8

 

comply with the applicable securities laws and regulations and will not be deemed to have
breached its obligations under this covenant by virtue of such compliance.

9. Denominations

     The Notes are in denominations of $2,000 and integral multiples of $1,000 of principal amount.
The transfer of Notes may be registered, and Notes may be exchanged, as provided in the Indenture.
The Registrar may require a Holder, among other things, to furnish appropriate endorsements and
transfer documents and to pay any taxes and fees required by law or permitted by the Indenture.

10. Unclaimed Money

     All moneys paid by Arch Coal or the Guarantors to the Trustee or a Paying Agent for the
payment of the principal of, or premium, if any, or interest on, any Notes that remain unclaimed at
the end of three years after such principal, premium or interest has become due and payable may be
repaid to Arch Coal or the Guarantors, subject to applicable law, and the Holder of such Note
thereafter may look only to Arch Coal or the Guarantors for payment thereof.

11. Discharge and Defeasance

     Subject to certain conditions, Arch Coal at any time may terminate some or all of its
obligations and the obligations of the Guarantors under the Notes, the Guarantees and the Indenture
if Arch Coal irrevocably deposits with the Trustee U.S. Dollars or U.S. Government Obligations for
the payment of principal and interest on the Notes to redemption or maturity, as the case may be.

12. Amendment, Supplement and Waiver

     Subject to certain exceptions set forth in the Indenture, the Indenture may be amended or
supplemented with the written consent of the Holders of at least a majority in aggregate principal
amount of the relevant Notes then outstanding (including consents obtained in connection with a
tender offer or exchange offer for the Notes) and any existing default or compliance with any
provisions may be waived with the consent of the Holders of at least a majority in aggregate
principal amount of the Notes then outstanding. However, without the consent of the Holder of each
outstanding Note affected thereby, an amendment may not:

	 	(a)	 	reduce the amount of Notes whose Holders must consent to an amendment or
waiver;
	 
	 	(b)	 	reduce the rate of, or extend the time for payment of, interest on any Note;
	 
	 	(c)	 	reduce the principal of, or extend the Stated Maturity of, any Note;
	 
	 	(d)	 	make any Note payable in money other than that stated in the Note;
	 
	 	(e)	 	impair the right of any Holder to receive payment of principal of, premium, if
any, and interest, on, such holder’s Notes on or after the due dates therefor or to

A-9

 

	 	 	 	institute suit for the enforcement of any payment on or with respect to such
Holder’s Notes;
	 
	 	(f)	 	reduce the premium payable upon the redemption of any Note or change the time
at which any Note may be redeemed, pursuant to Section 3.01 of the Indenture;
	 
	 	(g)	 	reduce the premium payable upon a Change of Control or, at any time after a
Change of Control has occurred, change the time at which the Change of Control Offer
relating thereto must be made or at which the Notes must be repurchased pursuant to
such Change of Control Offer;
	 
	 	(h)	 	at any time after Arch Coal is obligated to make a Prepayment Offer with the
Excess Proceeds from Asset Sales, change the time at which such Prepayment Offer must
be made or at which the Notes must be repurchased pursuant thereto;
	 
	 	(i)	 	modify or change any provision of the Indenture affecting the ranking of the
Notes or the Note Guarantees in a manner adverse to the Holders; or
	 
	 	(j)	 	release any Guarantor from any of its obligations under its Note Guarantee or
the Indenture other than in accordance with the provisions of the Indenture, or amend
or modify any provision relating to such release.

     The consent of the Holders is not necessary under the Indenture to approve the particular form
of any proposed amendment. It is sufficient if such consent approves the substance of the proposed
amendment.

     Notwithstanding the foregoing, without notice to or the consent of any Holder of the Notes,
Arch Coal, the Guarantors and the Trustee may, among other things, modify, amend or supplement the
Indenture:

     (a) cure any ambiguity, omission, defect or inconsistency in any manner that is not
adverse in any material respect to any holder of the Notes;

     (b) provide for the assumption by a Surviving Person of the obligations of Arch Coal
under the Indenture;

     (c) provide for uncertificated Notes in addition to or in place of certificated Notes
(provided that the uncertificated Notes are issued in registered form for purposes of Section
163(f) of the Code, or in a manner such that the uncertificated Notes are described in Section
163(f)(2)(B) of the Code);

     (d) add Note Guarantees with respect to the Notes or confirm and evidence the release,
termination or discharge of any security or Note Guarantee when such release, termination or
discharge is permitted by the Indenture;

     (e) secure the Notes, add to the covenants of Arch Coal for the benefit of the Holders or
surrender any right or power conferred upon Arch Coal;

A-10

 

     (f) make any change that does not adversely affect the rights of any holder of the Notes;

     (g) comply with any requirement of the Commission in connection with the qualification of
this Indenture under the Trust Indenture Act; or

     (h) provide for the issuance of Additional Notes in accordance with the Indenture.

     After an amendment becomes effective in accordance with the above position, Arch Coal shall
mail to each Holder at such Holder’s address appearing in the Security Register a notice briefly
describing such amendment. However, the failure to give such notice to all Holders, or any defect
therein, will not impair or affect the validity of the amendment.

13. Defaults and Remedies

     The Notes have the Events of Default as set forth in Section 6.01 of the Indenture. If an
Event of Default occurs and is continuing, the Trustee, by notice to Arch Coal, or the registered
Holders of not less than 25% in aggregate principal amount of the Notes then outstanding by notice
to Arch Coal and the Trustee, subject to certain limitations, may declare all the Notes to be due
and payable immediately. Certain events of bankruptcy or insolvency are Events of Default and shall
result in the Notes being due and payable immediately upon the occurrence of such Events of
Default.

     Holders may not enforce the Indenture or the Notes except as provided in the Indenture. The
Trustee may refuse to enforce the Indenture or the Notes unless it receives an indemnity
satisfactory to it. Subject to certain limitations, Holders of a majority in aggregate principal
amount of the Notes may direct the Trustee in its exercise of any trust or power. The Holders of a
majority in aggregate principal amount of the Notes then outstanding by written notice to the
Trustee may rescind any acceleration and its consequence if the rescission would not conflict with
any judgment or decree and if all existing Events of Default have been cured or waived except
nonpayment of principal, premium, if any, or interest that has become due solely because of such
acceleration. The above description of Events of Default and remedies is qualified by reference,
and subject in its entirety, to the more complete description thereof contained in the Indenture.

14. Trustee Dealings with Arch Coal

     Subject to certain limitations imposed by the Trust Indenture Act, the Trustee under the
Indenture, in its individual or any other capacity, may become the owner or pledgee of Notes and
may otherwise deal with and collect obligations owed to it by Arch Coal, the Guarantor or any of
their Affiliates with the same rights it would have if it were not Trustee. Any Paying Agent,
Registrar, co-Registrar or co-Paying Agent may do the same with like rights.

15. No Recourse Against Others

     A director, officer, employee, or stockholder, as such, of Arch Coal or the Guarantor shall
not have any liability for any obligations of Arch Coal or the Guarantor under the Notes, the
Guarantees or the Indenture or for any claim based on, in respect of, or by reason of, such

A-11

 

obligations or their creation. By accepting a Note, each Holder shall waive and release all
such liability. The waiver and release are part of the consideration for the issue of the Notes.

16. Authentication

     This Note shall not be valid until an authorized officer of the Trustee (or an authenticating
agent) manually signs the certificate of authentication on the other side of this Note.

17. Governing Law

     THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

     Arch Coal or a Guarantor shall furnish to any Holder upon written request and without charge
to the Holder a copy of the Indenture. Requests may be made to:

Arch Coal, Inc.

One CityPlace Drive

Suite 300

St. Louis, Missouri 63141

A-12

 

ASSIGNMENT FORM

To assign and transfer this Note, fill in the form below:

(I) or (Arch Coal) assign and transfer this Note to

	 	 	 
	 

(Insert assignee’s social security or tax I.D. no.)

	 	 

	 	 	 
	 

(Print or type assignee’s name, address and postal code)

	 	 

and irrevocably appoint   
                
              
              
           
             
           agent to transfer this Note on the books of
Arch Coal. The agent may substitute another to act for him.

	 	 	 	 	 
	Your Signature:

	 	 	 	 
	 

	 	 	 	 
	 

	 	(Sign exactly as your name appears on the other side of this Note)	 	 

	 	 	 	 	 
	Signature Guarantee:

	 	 	 	 
	 

	 	 	 	 
	 

	 	(Participant in a recognized signature guarantee medallion program)	 	 

	 	 	 	 	 
	Date:

	 	 	 	 
	 

	 	 	 	 

	 	 	 	 	 
	Certifying Signature:

	 	 	 	 
	 

	 	 	 	 

     [Include only if Original Note and delete if Exchange Note — In connection with any transfer
of any Notes evidenced by this certificate occurring prior to the date that is two years after the
later of the date of original issuance of such Notes and the last date, if any, on which the Notes
were owned by Arch Coal or any Affiliate of Arch Coal, the undersigned confirms that such Notes are
being transferred in accordance with the transfer restrictions set forth in such Notes and:

CHECK ONE BOX BELOW

	 	 	 	 	 
	(1)

	 	o
	 	to Arch Coal; or
	 
	 	 	 	 
	(2)

	 	o
	 	pursuant to and in compliance with Rule 144A under the U.S.
Securities Act of 1933; or
	 
	 	 	 	 
	(3)

	 	o
	 	pursuant to and in compliance with Regulation S under the U.S.
Securities Act of 1933; or
	 
	 	 	 	 
	(4)

	 	o
	 	pursuant to another available exemption from the
registration requirements of the U.S. Securities
Act of 1933; or
	 
	 	 	 	 
	(5)

	 	o
	 	pursuant to an effective registration statement
under the U.S. Securities Act of 1933.

A-13

 

     Unless one of the boxes is checked, the Trustee will refuse to register any of the Notes
evidenced by this certificate in the name of any person other than the registered Holder thereof;
provided, however, that if box (2) is checked, by executing this form, the Transferor is deemed to
have certified that such Notes are being transferred to a person it reasonably believes is a
“qualified institutional buyer” as defined in Rule 144A under the U.S. Securities Act of 1933 who
has received notice that such transfer is being made in reliance on Rule 144A; if box (3) is
checked, by executing this form, the Transferor is deemed to have certified that such transfer is
made pursuant to an offer and sale that occurred outside the United States in compliance with
Regulation S under the U.S. Securities Act; and if box (4) is checked, the Trustee may require,
prior to registering any such transfer of the Notes, such legal opinions, certifications and other
information as Arch Coal reasonably requests to confirm that such transfer is being made pursuant
to an exemption from or in a transaction not subject to, the registration requirements of the U.S.
Securities Act of 1933.

	 	 	 	 	 
	Signature:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Signature Guarantee:	 	 
	 
	 	 	 	 
	 	 	 

(Participant in a recognized signature guarantee medallion program)

Certifying Signature:                                          Date: 
              
               
          

Signature Guarantee:                                                             

(Participant in a recognized signature guarantee medallion program)]

OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Note or a portion thereof repurchased pursuant to Section
4.09 or 4.11 of the Indenture, check the box: o

     If the purchase is in part, indicate the portion (in denominations of $1,000 or any integral
multiple thereof) to be purchased:

Your signature:

(Sign exactly as your name appears on the other side of this Note)

Date:

Certifying Signature:                                                             

A-14

 

SCHEDULE A

SCHEDULE OF PRINCIPAL AMOUNT

     The following decreases/increases in the principal amount of this Security have been made:

	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	Principal	 	 
	 	 	 	 	 	 	Amount	 	 
	Date of	 	Decrease in	 	Increase in	 	Following such	 	Notation Made
	Decrease/	 	Principal	 	Principal	 	Decrease/	 	by or on Behalf
	Increase	 	Amount	 	Amount	 	Increase	 	of Registrar
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 
	 	 
	 	 
	 	 

A-15

 

EXHIBIT B

FORM OF TRANSFER CERTIFICATE FOR TRANSFER FROM RESTRICTED GLOBAL

NOTE TO REGULATION S GLOBAL NOTE

(Transfers pursuant to § 2.06(a)(ii) of the Indenture)

U.S. Bank National Association

100 Wall Street, 16th Floor

New York, NY 10005

Re: 8.750% Senior Notes Due 2016 (the “Notes”)

     Reference is hereby made to the Indenture dated as of July 31, 2009, (the “Indenture”)
among Arch Coal, Inc., a Delaware corporation (“Arch Coal”) and Allegheny Land Company, a
Delaware corporation, Arch Coal Sales Company, Inc., a Delaware corporation, Arch Coal Terminal,
Inc., a Delaware corporation, Arch Energy Resources, LLC, a limited liability company organized
under the laws of Delaware, Arch Reclamation Services, Inc., a Delaware corporation, Ark Land
Company, a Delaware corporation, Ark Land KH, Inc., a Delaware corporation, Ark Land LT, Inc., a
Delaware corporation, Ark Land WR, Inc., a Delaware corporation, Ashland Terminal, Inc., a Delaware
corporation, Coal-Mac, Inc., a Kentucky corporation, Cumberland River Coal Company, a Delaware
corporation, Lone Mountain Processing, Inc., a Delaware corporation, Mingo Logan Coal Company, a
Delaware corporation, Mountain Gem Land, Inc., a West Virginia corporation, Mountain Mining, Inc.,
a Delaware corporation, Mountaineer Land Company, a Delaware corporation, Prairie Holdings, Inc., a
Delaware corporation, Western Energy Resources, Inc., a Delaware corporation (collectively the
“Guarantors”), and U.S. Bank National Association, a New York banking corporation. Capitalized
terms used but not defined herein shall have the meanings given them in the Indenture.

     This letter relates to                      aggregate principal amount of Notes that are held as a
beneficial interest in the form of the Restricted Global Note (CUSIP No. 039380 AA8; ISIN No:
US039380AA89) with the Depositary in the name of [name of transferor](the “Transferor”).
The Transferor has requested an exchange or transfer of such beneficial interest for an equivalent
beneficial interest in the Regulation S Global Note (Common Code No. U0393C AA3; ISIN No.
USU0393CAA337).

     In connection with such request, the Transferor does hereby certify that such transfer has
been effected in accordance with the transfer restrictions set forth in the Notes and:

	 	(a)	 	with respect to transfers made in reliance on Regulation S (“Regulation S”)
under the United States Securities Act of 1933, as amended (the “U.S. Securities Act”),
does certify that:

          (i) the offer of the Notes was not made to a person in the United States;

B-1

 

          (ii) either (1) at the time the buy order is originated the transferee is outside the
United States or the Transferor and any person acting on its behalf reasonably believe that
the transferee is outside the United States or; (2) the transaction was executed in, on or
through the facilities of a designated offshore securities market described in paragraph (b)
of Rule 902 of Regulation S and neither the Transferor nor any person acting on its behalf
knows that the transaction was pre-arranged with a buyer in the United States

          (iii) no directed selling efforts have been made in the United States by the
Transferor, an affiliate thereof or any person their behalf in contravention of the
requirements of Rule 903 or 904 of Regulation S, as applicable;

          (iv) the transaction is not part of a plan or scheme to evade the registration
requirements of the U.S. Securities Act; and

          (v) the Transferor is not Arch Coal, a distributor of the Notes, an affiliate of Arch
Coal or any such distributor (except any officer or director who is an affiliate solely by
virtue of holding such position) or a person acting on behalf of any of the foregoing.

	 	(b)	 	with respect to transfers made in reliance on Rule 144 the Transferor certifies
that the Notes are being transferred in a transaction permitted by Rule 144 under the
U.S. Securities Act.

     You, Arch Coal, the Guarantors and the Trustee are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested party in any
administrative or legal proceedings or official inquiry with respect to the matters covered hereby.
Terms used in this certificate have the meanings set forth in Regulation S.

[Name of Transferor]

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Name:
	 	 	 	 
	 
	 	 	 	 
	Title:
	 	 	 	 
	 
	 	 	 	 
	Date:
	 	 	 	 

               cc:

Attn:

B-2

 

EXHIBIT C

FORM OF TRANSFER CERTIFICATE FOR TRANSFER FROM REGULATION S GLOBAL

NOTE TO RESTRICTED GLOBAL NOTE

(Transfers pursuant to § 2.06(a)(ii) of the Indenture)

U.S. Bank National Association

100 Wall Street, 16th Floor

New York, NY 10005

Re: 8.750% Senior Notes Due 2016 (the “Notes”)

     Reference is hereby made to the Indenture dated as of July 31, 2009, (the “Indenture”)
among Arch Coal, Inc., a Delaware corporation (the “Arch Coal”) and Allegheny Land Company,
a Delaware corporation, Arch Coal Sales Company, Inc., a Delaware corporation, Arch Coal Terminal,
Inc., a Delaware corporation, Arch Energy Resources, LLC, a limited liability company organized
under the laws of Delaware, Arch Reclamation Services, Inc., a Delaware corporation, Ark Land
Company, a Delaware corporation, Ark Land KH, Inc., a Delaware corporation, Ark Land LT, Inc., a
Delaware corporation, Ark Land WR, Inc., a Delaware corporation, Ashland Terminal, Inc., a Delaware
corporation, Coal-Mac, Inc., a Kentucky corporation, Cumberland River Coal Company, a Delaware
corporation, Lone Mountain Processing, Inc., a Delaware corporation, Mingo Logan Coal Company, a
Delaware corporation, Mountain Gem Land, Inc., a West Virginia corporation, Mountain Mining, Inc.,
a Delaware corporation, Mountaineer Land Company, a Delaware corporation, Prairie Holdings, Inc., a
Delaware corporation, Western Energy Resources, Inc., a Delaware corporation (collectively the
“Guarantors”), and U.S. Bank National Association, a New York banking corporation. Capitalized
terms used but not defined herein shall have the meanings given them in the Indenture.

     This letter relates to $                     aggregate principal amount at maturity of Notes that are
held in the form of the Regulation S Global Note with the Depositary (Common Code No.                     ; ISIN
No.                     ) in the name of Cede & Co. (the “Transferor”) to effect the transfer of the
Notes in exchange for an equivalent beneficial interest in the Restricted Global Note (CUSIP No.
                    , ISIN No.                     ).

     In connection with such request, and in respect of such Notes the Transferor does hereby
certify that such Notes are being transferred in accordance with the transfer restrictions set
forth in the Notes and that:

     CHECK ONE BOX BELOW:

	 	oo	 	 the Transferor is relying on Rule 144A under the United States Securities
Act of 1933, as amended (the “Securities Act”) for exemption from such
Act’s registration requirements; it is transferring such Notes to a person it
reasonably believes is a “qualified institutional buyer” as defined in Rule

C-1

 

	 	 	 	144A that purchases for its own account, or for the account of a qualified
institutional buyer, and to whom the Transferor has given notice that the
transfer is made in reliance on Rule 144A and the transfer is being made in
accordance with any applicable securities laws of any state of the United
States; or

	 	o:	 	 the Transferor is relying on an exemption other than Rule 144A from the
registration requirements of the Securities Act, subject to Arch Coal’s and the
Trustee’s right prior to any such offer, sale or transfer to require the
delivery of an Opinion of Counsel, certification and/or other information
satisfactory to each of them.

     You, Arch Coal, the Guarantors and the Trustee are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested party in any
administrative or legal proceedings or official inquiry with respect to the matters covered hereby.

[Name of Transferor]

	 	 	 	 	 
	By:

	 	 	 	 
	 

	 	 	 	 
	 
	 	 	 	 
	Name:
	 	 	 	 
	 
	 	 	 	 
	Title:
	 	 	 	 
	 
	 	 	 	 
	Dated:
	 	 	 	 

          cc:

          Attn:

C-2

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