exv4w10






Exhibit 4.10




SECOND SUPPLEMENTAL INDENTURE GOVERNING

7 1/4% SENIOR NOTES DUE 2020

OF ARCH COAL, INC.



This SECOND SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of December 16, 2010,
among Arch Coal West, LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”),
Arch Coal, Inc., a Delaware corporation (the “Company”), the other Guarantors (as defined in the
Indenture referred to below) and U.S. Bank National Association, as trustee under the Indenture
referred to below (the “Trustee”).




WITNESSETH



WHEREAS, the Guaranteeing Subsidiary is a subsidiary of the Company; and



WHEREAS, the Company has heretofore entered into an Indenture, dated August 9, 2010 (as heretofore
supplemented, the “Indenture”), between the Company and the Trustee, and the related First
Supplemental Indenture, dated August 9, 2010(the “First Supplemental Indenture”), among the
Company, certain Guarantors and the Trustee, providing for the issuance of 7 1/4% Senior Notes due
2020 (the “Notes”); and



WHEREAS, the Indenture provides that the Company shall cause any Person which becomes obligated to
Guarantee the Notes, pursuant to the terms of Section 4.13 of the First Supplemental Indenture, to
execute a supplemental indenture pursuant to which such Person shall Guarantee the obligations of
the Company under the Notes and the Indenture in accordance with Article Ten of the First
Supplemental Indenture with the same effect and to the same extent as if such Person had been named
in the Indenture as a Guarantor; and



WHEREAS, pursuant to Section 9.01 of the First Supplemental Indenture, the Trustee is authorized to
execute and deliver this Supplemental Indenture.



NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration,
the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually
covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:



1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings
assigned to them in the Indenture.



2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide a Guarantee on
the terms and subject to the conditions set forth in the Indenture including, but not limited to,
Article Ten of the First Supplemental Indenture. From and after the date hereof, the Guaranteeing
Subsidiary shall be a Guarantor for all purposes under the Indenture and the Notes.



3. NO RECOURSE AGAINST OTHERS. No past, present or future member, manager, director,
officer, employee or agent of the Guaranteeing Subsidiary, as such, shall have any liability for
any obligations of the Company, the Guaranteeing Subsidiary, or any other






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Guarantor, under the Notes, any Guarantee, the Indenture or this Supplemental Indenture or for any
claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of
the Notes or any Guarantee by accepting a Note waives and releases all such liability. The waiver
and release are part of the consideration for issuance of the Notes and the Guarantee.



4. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF
LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED
THEREBY.



5. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each
signed copy shall be an original, but all of them together represent the same agreement.



6. EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect
the construction hereof.



7. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect
of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals
contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the
Company.




[SIGNATURE PAGES FOLLOW]







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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed
and attested, all as of the date first above written.




SIGNATURES




	 	 	 	 	 
	 	ARCH COAL, INC.

as Issuer

 	 
	 	By:  	/s/ John T. Drexler
 	 
	 	Name:  	John T. Drexler 	 
	 	Title:  	Senior Vice President and
Chief Financial Officer 	 
	 
	 	ALLEGHENY LAND COMPANY

ARCH COAL SALES COMPANY, INC.

ARCH COAL TERMINAL, INC.

ARCH COAL WEST, LLC

ARCH DEVELOPMENT, LLC

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.

CATENARY COAL HOLDINGS, 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

OTTER CREEK COAL, LLC

PRAIRIE HOLDINGS, INC.

WESTERN ENERGY RESOURCES, INC.

each as a Guarantor

 	 
	 	By:  	/s/ John T. Drexler
 	 
	 	Name:  	John T. Drexler 	 
	 	Title:  	Vice President 	 
	 



Signature Page to Second Supplemental Indenture







 









 








	 	 	 	 	 
	 	U.S. BANK NATIONAL ASSOCIATION

as Trustee

 	 
	 	By:  	/s/ Brian J. Kabbes
 	 
	 	Name:  	Brian J. Kabbes 	 
	 	Title:  	Vice President 	 
	 



Signature Page to Second Supplemental Indenture