Supplemental Indenture No. 6



 Exhibit 4.8 
 CONSOL ENERGY INC. 
 SUPPLEMENTAL INDENTURE NO. 6 
 $250,000,000 
 7.875% Notes due 2012

 THIS SUPPLEMENTAL INDENTURE NO. 6, dated as of August 2, 2006 (this “Supplemental Indenture No. 6”), by and among
CONSOL ENERGY INC., a Delaware corporation (the “Company”), the Guarantors listed on Schedule I hereto and THE BANK OF NOVA SCOTIA TRUST COMPANY OF NEW YORK, a New York trust company, as trustee under the Indenture
referred to below (the “Trustee”). 
 RECITALS OF THE COMPANY 
 WHEREAS, the Company has heretofore executed and delivered to the Trustee an Indenture dated as of March 7, 2002 (the “Indenture”), a
Supplemental Indenture No. 1 dated as of March 7, 2002, a Supplemental Indenture No. 2 dated as of September 30, 2003, a Supplemental Indenture No. 3 dated as of April 15, 2005, a Supplemental Indenture No. 4 dated
as of August 8, 2005, and a Supplemental Indenture No. 5 dated as of October 21, 2005 (such Supplemental Indentures, collectively, the “Supplemental Indentures”) providing for the issuance of the 7.875% Notes due 2012 in the
aggregate principal amount of $250,000,000; 
 WHEREAS, Article IX of the Indenture provides for various matters with respect to any series
of Securities issued under the Indenture to be established in an indenture supplemental to the Indenture; 
 WHEREAS, certain subsidiaries of
the Company, being Mon River Towing, Inc., J.A.R. Barge Lines, LLC and CONSOL of Central Pennsylvania LLC (the “Subsidiaries”), have or will enter into Guarantor Joinder and Assumption Agreements pursuant to the Amended and Restated Credit
Agreement, dated as of April 1, 2005, by and among the Company and a group of commercial lenders (the “Credit Agreement”) under which the Subsidiaries will guarantee Indebtedness (as defined in the Indenture); 
 WHEREAS, pursuant to Section 4.07 of the Indenture, upon the guarantee of indebtedness under the Credit Agreement, the Subsidiaries would become
Guarantor Subsidiaries within the meaning of that term in the Indenture and are required to deliver a Subsidiary Guarantee; 
 WHEREAS,
Section 9.01(a)(11) of the Indenture provides that the Company, the Guarantor Subsidiaries and the Trustee may enter into an indenture supplemental to the Indenture to allow any Guarantor Subsidiary to execute a supplemental indenture in
respect of a Subsidiary Guarantee; 







 WHEREAS, all the conditions and requirements necessary to make this Supplemental Indenture No. 6,
when duly executed and delivered, a valid and binding agreement in accordance with its terms and for the purposes herein expressed, have been performed and fulfilled. 
 NOW THEREFORE, THIS SUPPLEMENTAL INDENTURE NO. 6 WITNESSETH: 
 For and in consideration of the premises,
the Company, the Guarantor Subsidiaries and the Trustee mutually covenant and agree for the equal and proportionate benefit of the respective Holders of the Securities of such series as follows: 
 ARTICLE ONE 
 RELATION TO INDENTURE;
DEFINITIONS; RULES OF CONSTRUCTION 
 SECTION 1.1 Relation to Indenture. This Supplemental Indenture No. 6 constitutes an
integral part of the Indenture. 
 SECTION 1.2 Rules of Construction. For all purposes of this Supplemental Indenture No. 6:

 (a) capitalized terms used herein without definition shall have the meanings specified in the Indenture; 
 (b) all references herein to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Supplemental
Indenture No. 6; 
 (c) the terms “herein,” “hereof,” “hereunder” and other words of similar import refer
to this Supplemental Indenture No. 6; and 
 (d) in the event of a conflict with the definition of terms in the Indenture, the
definitions in this Supplemental Indenture No. 6 shall control. 
 ARTICLE TWO 
 GUARANTOR SUBSIDIARIES 
 SECTION 2.1
Subsidiary Guarantees. Effective as of the date hereof, each of the Subsidiaries hereby fully and unconditionally Guarantee the Company’s Obligations under the Indenture and under any Securities of any Series issued under the Indenture
in accordance with Article XI of the Indenture. 
 SECTION 2.2 Guarantor Subsidiaries and Guarantors. Effective as of the date
hereof, (i) the Guarantor Subsidiaries listed on Schedule I of the Indenture shall be as set forth on Schedule I attached hereto and (ii) the “Guarantors” as defined in the Supplemental
Indentures shall mean those subsidiaries of the Company listed on Schedule I attached hereto. 
  

 2 








 ARTICLE THREE 
 MISCELLANEOUS PROVISIONS 
 SECTION 3.1 Ratification. The Indenture, as supplemented and
amended by the Supplemental Indentures and this Supplemental Indenture No. 6, is in all respects hereby adopted, ratified and confirmed. 
 SECTION 3.2 Trustee Not Liable for Recitals. The recitals contained herein are made by the Company and the Guarantors, and the Trustee assumes no liability for the correctness thereof. The Trustee makes no representations as to the
validity or sufficiency of this Supplemental Indenture No. 6. 
 SECTION 3.3 Counterparts. This Supplemental Indenture No. 6
may be executed in any number of counterparts, each of which when so executed shall be deemed an original, and all such counterparts shall together constitute but one and the same instrument. 
 SECTION 3.4 Governing Law. THIS SUPPLEMENTAL INDENTURE NO. 6 SHALL BE GOVERNED BY THE INTERNAL LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES
SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SAID STATE. 
 [remainder of page intentionally left blank] 
  

 3 








 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture No. 6 to be duly
executed as of the day and year first above written. 
  

			
	CONSOL ENERGY INC.
		
	By:	 	 /s/ John M. Reilly

	Name:	 	John M. Reilly
	Title:	 	Treasurer










			
		 	GUARANTOR SUBSIDIARIES and GUARANTORS:
		
		 	CNX MARINE TERMINALS INC.
		 	CONSOL FINANCIAL INC.
		 	CONSOL OF CANADA INC.
		 	CONSOL OF CENTRAL PENNSYLVANIA LLC
		 	CONSOL OF KENTUCKY INC.
		 	CONSOL PENNSYLVANIA COAL COMPANY
		 	CONSOL ENERGY SALES COMPANY
		 	J.A.R. BARGE LINES, LCC
		 	LEATHERWOOD, INC.
		 	MON RIVER TOWING, INC.
		 	ROCHESTER & PITTSBURGH COAL COMPANY
		 	WOLFPEN KNOB DEVELOPMENT COMPANY
		
	By:	 	 /s/ John M. Reilly

		 	 John M. Reilly, Treasurer of each Guarantor
 Subsidiary
listed above on behalf of each such
 Guarantor Subsidiary

		
		 	CENTRAL OHIO COAL COMPANY
		 	CONSOLIDATION COAL COMPANY
		 	EIGHTY-FOUR MINING COMPANY
		 	HELVETIA COAL COMPANY
		 	ISLAND CREEK COAL COMPANY
		 	KEYSTONE COAL MINING CORPORATION
		 	LAUREL RUN MINING COMPANY
		 	McELROY COAL COMPANY
		 	SOUTHERN OHIO COAL COMPANY
		 	TWIN RIVERS TOWING COMPANY
		 	WINDSOR COAL COMPANY
		
	By:	 	 /s/ Dan Cangilla

		 	 Dan Cangilla, Treasurer of each Guarantor
 Subsidiary
listed above on behalf of each such
 Guarantor Subsidiary











			
	CNX LAND RESOURCES INC.
		
	By:	 	 /s/ Bart J. Hyita

	Name:	 	Bart J. Hyita
	Title:	 	President
	
	CONSOL DOCKS INC.
		
	By:	 	 /s/ J.C. Grech

	Name:	 	J. C. Grech
	Title:	 	President
	
	MTB INC.
		
	By:	 	 /s/ Lloyd C. Price

	Name:	 	Lloyd C. Price
	Title:	 	Vice President
	
	RESERVE COAL PROPERTIES COMPANY
		
	By:	 	 /s/ Lloyd C. Price

	Name:	 	Lloyd C. Price
	Title:	 	Vice President










			
	TERRA FIRMA COMPANY
		
	By:	 	 /s/ Lloyd C. Price

	Name:	 	Lloyd C. Price
	Title:	 	Vice President
	
	CONRHEIN COAL COMPANY
		
	By:	 	 /s/ John M. Reilly

	Name:	 	John M. Reilly
	Title:	 	Treasurer
	
	CONSOL OF WV LLC
		
	By:	 	 /s/ John M. Reilly

	Name:	 	John M. Reilly
	Title:	 	Treasurer










					
	CNX GAS CORPORATION
		
	By:	 	 /s/ Gary J. Bench

	Name:	 	Gary J. Bench
	Title:	 	 Senior Vice President, Chief Financial Officer, Treasurer and Secretary

	
	CNX GAS COMPANY LLC
		
	By:	 	 /s/ Ronald E. Smith

	Name:	 	Ronald E. Smith
	Title:	 	President
	
	CARDINAL STATES GATHERING COMPANY
	
	By: CNX Gas Company LLC, as Partnership       Manager
			
		 	By:	 	 /s/ Ronald E. Smith

		 	Name:	 	Ronald E. Smith
		 	Title:	 	President










			
	TRUSTEE:
	THE BANK OF NOVA SCOTIA TRUST
COMPANY OF NEW YORK, as Trustee
		
	By:	 	 /s/ Warren A. Goshine

	Name:	 	Warren Goshine
	Title:	 	Vice President









 SCHEDULE I 
 GUARANTOR SUBSIDIARIES AND GUARANTORS: 
 Central Ohio Coal Company 
 (Ohio corporation) 
 CNX Land Resources Inc. 
 (Delaware corporation) 
 CNX Marine Terminals Inc. 
 (Delaware corporation) 
 Conrhein Coal Company 
 (Pennsylvania general partnership) 
 Consol Docks Inc. 
 (Delaware corporation) 
 CONSOL Financial Inc. 
 (Delaware corporation) 
 CONSOL of Central Pennsylvania LLC 
 (Pennsylvania limited liability company) 
 CONSOL of Canada Inc. 

(Delaware corporation) 
 CONSOL of Kentucky Inc. 
 (Delaware corporation) 
 CONSOL of WV LLC 
 (West Virginia limited liability company) 
 CONSOL Pennsylvania Coal Company

 (Delaware corporation) 
 CONSOL Energy Sales Company

 (Delaware corporation) 
 CONSOLIDATION COAL COMPANY

 (Delaware corporation) 
 Eighty-Four Mining Company

 (Pennsylvania corporation) 
 Helvetia Coal Company 

(Pennsylvania corporation) 
 ISLAND CREEK COAL COMPANY 
 (Delaware corporation) 
 J.A.R. Barge Lines, LLC 
 (Pennsylvania limited liability company) 
 Keystone Coal Mining Corporation

 (Pennsylvania corporation) 
 Laurel Run Mining Company

 (Virginia corporation) 







 Leatherwood, Inc. 
 (Pennsylvania corporation) 
 McELROY COAL COMPANY 
 (Delaware corporation) 
 Mon River Towing, Inc. 
 (Pennsylvania corporation) 
 MTB Inc. 
 (Delaware
corporation) 
 RESERVE COAL PROPERTIES COMPANY 
 (Delaware
corporation) 
 Rochester & Pittsburgh Coal Company 
 (Pennsylvania corporation) 
 SOUTHERN OHIO COAL COMPANY 
 (West Virginia corporation) 
 Terra Firma Company 
 (West Virginia corporation) 
 TWIN RIVERS TOWING COMPANY 
 (Delaware corporation) 
 Windsor Coal Company 
 (West
Virginia corporation) 
 WOLFPEN KNOB DEVELOPMENT COMPANY 
 (Virginia corporation) 
 CNX Gas Corporation 
 (Delaware corporation) 
 CNX Gas Company LLC 
 (Virginia limited liability company) 
 Cardinal States Gathering Company 
 (Virginia general partnership)