Document:

Notation of Guarantee, dated December 27, 2010.

 Exhibit 4.5 
 NOTATION OF GUARANTEE 
 For value received, each Guarantor (which term includes
any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth in the Indenture and subject to the provisions in the Indenture dated as of October 22, 2010 (the
“Indenture”) among Clearwater Paper Corporation, (the “Company”), the Guarantors party thereto and U.S. Bank National Association, as trustee (the “Trustee”), (a) the due and punctual payment
of the principal of, premium and Additional Interest, if any, and interest on, the Notes, whether at maturity, by acceleration, redemption or otherwise, the due and punctual payment of interest on overdue principal of and interest on the Notes, if
any, if lawful, and the due and punctual performance of all other obligations of the Company to Holders or the Trustee all in accordance with the terms of the Indenture and (b) in case of any extension of time of payment or renewal of any Notes
or any of such other obligations, that the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at Stated Maturity, by acceleration or otherwise. The obligations of the Guarantors
to Holders and to the Trustee pursuant to the Note Guarantee and the Indenture are expressly set forth in Article 10 of the Indenture and reference is hereby made to the Indenture for the precise terms of the Note Guarantee. 

Capitalized terms used but not defined herein have the meanings given to them in the Indenture. 

Cellu Tissue Holdings, Inc., a Delaware corporation 
 Cellu Tissue Corporation–Natural Dam, a Delaware corporation 
 Cellu Tissue
Corporation–Neenah, a Delaware corporation 
 Cellu Tissue LLC, a Delaware limited liability company 

Coastal Paper Company, a Virginia general partnership 
 Menominee Acquisition Corporation, a Delaware corporation 
 Van Paper Company, a
Mississippi corporation 
 Van Timber Company, a Mississippi corporation 
 Cellu Tissue–Thomaston, LLC, a Delaware limited liability company 
 Cellu
Tissue–Long Island, LLC, a Delaware limited liability company 
 Cellu Tissue Corporation–Oklahoma City, a Delaware corporation

  

			
	By:	 	 /s/ Linda K. Massman

			
	Name:	 	Linda K. Massman
	Title:	 	Vice President and Chief Financial Officer
		
	Dated:	 	December 27, 2010

  

SIGNATURE PAGE TO NOTATION OF GUARANTEE (2010
NOTES)Joinder Agreement, dated December 27, 2010.

 Exhibit 4.6 
 JOINDER AGREEMENT 
 DECEMBER 27, 2010 

WHEREAS, CLEARWATER PAPER CORPORATION, a Delaware corporation ( the “Company”), and Banc of America Securities LLC (the
“Initial Purchaser”) heretofore executed and delivered a Purchase Agreement (“Purchase Agreement”), dated October 13, 2010, providing for the issuance and sale of the Securities (as defined therein); and

 WHEREAS, the Company and the Initial Purchaser heretofore executed and delivered a Registration Rights Agreement, dated
October 22, 2010 (the “Registration Rights Agreement”), providing for the registration under the Securities Act of 1933 of the Securities; and 
 WHEREAS, as a condition to the consummation of the offering of the Securities, the Company agreed to cause each party signatory hereto (each a “Joinder Party” and collectively, the
“Joinder Parties”) to become party to the Purchase Agreement and the Registration Rights Agreement upon the Release (as such term is defined in the Purchase Agreement) by executing this Joinder Agreement (this
“Joinder”). 
 Capitalized terms used herein and not otherwise defined herein shall have the meanings ascribed
to such terms in the Purchase Agreement and/or Registration Rights Agreement, as applicable. 
 NOW, THEREFORE, each Joinder
Party hereby agrees for the benefit of the holders of the Securities, as follows: 
 1. Representations and Warranties and
Agreements of each Joinder Party. Each Joinder Party hereby represents and warrants to and agrees that it has all the requisite corporate limited liability company or partnership power and authority to execute, deliver and perform its
obligations under this Joinder and the consummation of the transaction contemplated hereby. This Joinder is a valid and legally binding agreement enforceable against each Joinder Party in accordance with its terms. 

2. Joinder. Without limiting the generality of the foregoing, each Joinder Party agrees that it will (i) be bound by all
covenants, agreements, representations, warranties and acknowledgments attributable to the Joinder Parties, including, without limitation, all obligations pursuant to Sections 8(a), (c) and (d), of the Purchase Agreement, and (ii) be bound
by the Registration Rights Agreement, as if such Joinder Party was a party thereto as of the date of the Purchase Agreement and the Registration Rights Agreement. 
 3. Counterparts. This Joinder may be signed in one or more counterparts (which may be delivered in original form or telecopier), each of which shall constitute an original when so executed and all
of which together shall constitute one and the same agreement. 
 4. Amendments. No amendment or waiver of any provision
of this Joinder, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties thereto. 

 5. Headings. The section headings used herein are for convenience only and shall not
affect the construction hereof. 
 6. APPLICABLE LAW. THE VALIDITY AND INTERPRETATION OF THIS JOINDER AGREEMENT, AND THE
TERMS AND CONDITIONS SET FORTH HEREIN SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED WHOLLY THEREIN. 

7. Partial Unenforceability. The invalidity or unenforceability of any section, paragraph or provision of this Joinder shall not
affect the validity or enforceability of any other section, paragraph or provision hereof. If any section, paragraph or provision of this Joinder is for any reason determined to be invalid or unenforceable, there shall be deemed to be made such
minor changes (and only such minor changes) as are necessary to make it valid and enforceable. 
 [Signature Page Follows]

  
 2 

 IN WITNESS WHEREOF, the undersigned have executed this Joinder Agreement as of the date
first written above. 
  

	
	 Cellu Tissue Holdings, Inc., a Delaware corporation
 Cellu Tissue Corporation–Natural Dam, a Delaware corporation
 Cellu Tissue
Corporation–Neenah, a Delaware corporation
 Cellu Tissue LLC, a Delaware limited liability company

Coastal Paper Company, a Virginia general partnership
 Menominee Acquisition Corporation, a Delaware corporation
 Van Paper Company, a
Mississippi corporation
 Van Timber Company, a Mississippi corporation
 Cellu Tissue–Thomaston, LLC, a Delaware limited liability company
 Cellu
Tissue–Long Island, LLC, a Delaware limited liability company
 Cellu Tissue Corporation–Oklahoma City, a Delaware
corporation

  

			
	By:	 	 /s/ Linda K. Massman

			
	Name:	 	Linda K. Massman
	Title:	 	Vice President and Chief Financial Officer

  

SIGNATURE PAGE TO JOINDER AGREEMENT (PURCHASE
AGREEMENT)Supplemental Indenture, dated December 27, 2010

 Exhibit 4.9 
 SUPPLEMENTAL INDENTURE 
 SUPPLEMENTAL INDENTURE
(this “Supplemental Indenture”), dated as of December 27, 2010, among the entities listed on Exhibit A attached hereto (each a “Guaranteeing Subsidiary”), each a subsidiary of Clearwater Paper
Corporation (or its permitted successor), a Delaware corporation (the “Company”), the Company, and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S S E T H 
 WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture dated as of June 11, 2009 (the “Indenture”), providing for the issuance of 10 5/8% Senior Notes due 2016 (the “Notes”);

 WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and
deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the
“Note Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the 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, each 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. Each Guaranteeing Subsidiary
hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof. 

4. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer,
employee, incorporator, stockholder or agent of the Guaranteeing Subsidiaries, as such, shall have any liability for any obligations of the Company or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, 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 by accepting a Note waives and releases all such liability. The waiver and release are part of the
consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy. 

5. 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. 

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

8. 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 Subsidiaries and the Company. 

[Signature Page Follows] 

  
 2 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed and attested, all as of the date first written above. 
 Cellu Tissue Holdings, Inc., a Delaware corporation 

Cellu Tissue Corporation–Natural Dam, a Delaware corporation 
 Cellu Tissue Corporation–Neenah, a Delaware corporation 
 Cellu Tissue LLC, a
Delaware limited liability company 
 Coastal Paper Company, a Virginia general partnership 

Menominee Acquisition Corporation, a Delaware corporation 
 Van Paper Company, a Mississippi corporation 
 Van Timber Company, a Mississippi
corporation 
 Cellu Tissue–Thomaston, LLC, a Delaware limited liability company 

Cellu Tissue–Long Island, LLC, a Delaware limited liability company 
 Cellu Tissue Corporation–Oklahoma City, a Delaware corporation 
 Cellu
Tissue-CityForest LLC, a Minnesota limited liability company 
  

			
	By:	 	 /s/ Linda K. Massman

			
	Name:	 	Linda K. Massman
	Title:	 	Vice President and Chief Financial Officer
	
	Clearwater Paper Corporation

			
		
	By:	 	 /s/ Linda K. Massman

			
	Name:	 	Linda K. Massman
	Title:	 	Vice President and Chief Financial Officer

  

SIGNATURE PAGE TO SUPPLEMENTAL INDENTURE (2009
NOTES) 

			
	U.S. Bank National Association, as Trustee
		
	By:	 	 /s/ Debby R. Wight

		 	Authorized Signatory

  

SIGNATURE PAGE TO SUPPLEMENTAL INDENTURE (2009
NOTES) 

 Exhibit A 
 Guaranteeing Subsidiaries 
  

	1.	Cellu Tissue Holdings, Inc., a Delaware corporation 

  

	2.	Cellu Tissue Corporation–Natural Dam, a Delaware corporation 

  

	3.	Cellu Tissue Corporation–Neenah, a Delaware corporation 

  

	4.	Cellu Tissue LLC, a Delaware limited liability company 

  

	5.	Coastal Paper Company, a Virginia general partnership 

  

	6.	Menominee Acquisition Corporation, a Delaware corporation 

  

	7.	Van Paper Company, a Mississippi corporation 

  

	8.	Van Timber Company, a Mississippi corporation 

  

	9.	Cellu Tissue–Thomaston, LLC, a Delaware limited liability company 

  

	10.	Cellu Tissue–Long Island, LLC, a Delaware limited liability company 

  

	11.	Cellu Tissue Corporation–Oklahoma City, a Delaware corporation 

  

	12.	Cellu Tissue-CityForest LLC, a Minnesota limited liability company

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