Document:

EX-10.3

 Exhibit 10.3 

Execution Version 
 FIRST AMENDMENT
TO SECOND AMENDED AND RESTATED CREDIT AND GUARANTY AGREEMENT 
 This AMENDMENT dated as of March 27, 2014 (this “Amendment”),
to the Second Amended and Restated Credit and Guaranty Agreement dated as of September 5, 2013 (as amended, restated or otherwise modified prior to the date hereof, the “Credit Agreement”), by and among FAIRMOUNT MINERALS,
LTD., a Delaware corporation (the “U.S. Borrower” or the “Borrower Representative”), FAIRMOUNT MINERALS HOLDINGS, INC., a Delaware corporation (“Holdings”), CERTAIN SUBSIDIARIES OF THE U.S.
BORROWER, as Guarantors, LAKE SHORE SAND COMPANY (Ontario) LTD., an entity organized under the laws of the province of Ontario, Canada, as Canadian Borrower (the “Canadian Borrower”, and, together with the U.S. Borrower, the
“Borrowers”), the Lenders party thereto from time to time, BARCLAYS BANK PLC (“Barclays”), as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such
capacity, the “Collateral Agent”), BARCLAYS BANK PLC, as the Revolving Administrative Agent (in such capacity, the “Revolving Administrative Agent”) and the other agents referred to therein. Except as otherwise
provided herein, all capitalized terms used but not defined herein shall have the meanings given them in the Credit Agreement. 
 A. WHEREAS, pursuant to the
Credit Agreement, the Lenders have extended, and have agreed to extend, credit to the Borrowers; 
 B. WHEREAS, on the Amendment Effective Date (as defined
herein), the U.S. Borrower shall (a) (i) borrow new term loans in an aggregate principal amount of $324,187,500.00 having the terms set forth for Tranche B-1 Term Loans (under and as defined in the Amended Credit Agreement (as defined
herein)) (such new term loans, the “New Tranche B-1 Term Loans”) and (ii) borrow new term loans in an aggregate principal amount of $923,787,500.00 having the terms set forth for Tranche B-2 Term Loans (under and as defined in
the Amended Credit Agreement) (such new term loans, the “New Tranche B-2 Term Loans”) and (b) use the proceeds of (i) the New Tranche B-1 Term Loans and (ii) the New Tranche B-2 Term Loans to repay in full all Term
Loans existing under the Credit Agreement immediately prior to the effectiveness of this Amendment (the holders of such existing Term Loans, the “Existing Term Lenders”). The transaction described in this paragraph is referred to
herein as the “Refinancing”. 
 C. WHEREAS, the Borrowers shall pay to each Existing Term Lender on the Amendment Effective Date all
outstanding principal and all accrued and unpaid interest on its Term Loans to, but not including, the Amendment Effective Date on such date of effectiveness; 

D. WHEREAS, Section 10.5(d) of the Credit Agreement provides that the Credit Agreement may be amended with the written consent of the Borrower
Representative, the Administrative Agent and the Lender providing Replacement Term Loans (as defined therein) (and no other Lender); 

 Accordingly, in consideration of the mutual agreements herein contained and other good and
valuable consideration, the sufficiency and receipt of which are hereby acknowledged, the parties hereto agree as follows: 
 SECTION 1.
Amendment of Credit Agreement. 
 (a) The definition of “Applicable Margin” in Section 1.01 of the Credit Agreement is
hereby amended by deleting clause (i) in its entirety and replacing it with the following: “(a) Tranche B-1 Term Loans or Tranche B-2 Term Loans that are Eurodollar Rate Loans, 3.50% per annum and (b) Tranche B-1 Term Loans or
Tranche B-2 Term Loans that are Base Rate Loans, 2.50% per annum”. 
 (b) Section 1.01 of the Credit Agreement is hereby
amended to add the following definition in appropriate alphabetical order: 
 “First Amendment Effective Date” shall mean
the date that the First Amendment to the Second Amended and Restated Credit and Guaranty Agreement became effective pursuant to its terms, which date was March 27, 2014.” 

(c) Section 2.13(e) is hereby amended and restated as follows: 

“(e) Tranche B-2 Term Loan Call Protection. In the event (i) all or any portion of the Tranche B-2 Term Loan is
repriced, effectively refinanced through any amendment of the Tranche B-2 Term Loans or refinanced with the proceeds of other secured Indebtedness or (ii) a Term Lender is replaced as a result of the mandatory assignment of its Tranche B-2 Term
Loans in the circumstances described in Section 2.23 following the failure of such Term Lender to consent to an amendment of this Agreement that would have the effect of reducing the stated rate of interest with respect to the Tranche B-2 Term
Loans of such Term Lender, in each case, for any reason within six months of the First Amendment Effective Date, such repricings, effective refinancings, refinancings or, solely with respect to such replaced Term Lender, mandatory assignments, will
be made at 101.0% of the amount repriced, effectively refinanced, refinanced or mandatorily assigned.” 
 SECTION 2. Loans. Each
Lender set forth on Schedule A hereto agrees (such Lender in such capacity, an “Additional Lender”), severally and not jointly, to make, on the Amendment Effective Date, a New Tranche B-1 Term Loan or a New Tranche B-2 Term Loan, as
applicable, to the Borrowers in accordance with the borrowing mechanics set forth in Section 2.01(b) of the Credit Agreement in the amount set forth as its New Tranche B-1 Term Loan Commitment (the “New Tranche B-1 Term Loan
Commitment”) or New Tranche B-2 Term Loan Commitment (the “New Tranche B-2 Term Loan Commitment”), as applicable, set forth opposite its name under the heading “New Tranche B-1 Term Loan Commitments” or “New
Tranche B-2 Term Loan Commitments”, as applicable, on Schedule A to this Amendment. The U.S. Borrower may only make one borrowing of each of the New Tranche B-1 Term Loan Commitment and New Tranche B-2 Term Loan Commitment and, once repaid, the
New Tranche B-1 Term Loans and New Tranche B-2 Term Loan may not be reborrowed. The proceeds of the New Tranche B-1 Term Loan and New Tranche B-2 Term Loan are to be used by the Borrowers solely for the purposes set forth in Recital B of this
Amendment. Subject to Sections 2.13(a) and 2.14 of the 

  
 2 

 
Credit Agreement, all amounts owed with respect to the New Tranche B-1 Term Loans shall be paid in full no later than the Tranche B-1 Term Loan Maturity Date and all amounts owed with
respect to the New Tranche B-2 Term Loan shall be paid in full no later than the Tranche B-2 Term Loan Maturity Date. Each Lender’s New Tranche B-1 Term Loan Commitment and/or New Tranche B-2 Term Loan Commitment, as applicable, shall
terminate immediately and without further action on the Amendment Effective Date after giving effect to the funding of such New Tranche B-1 Term Loan Commitment and New Tranche B-2 Term Loan Commitment on such date. For the avoidance of doubt, from
and after the Amendment Effective Date, (a) references in the Credit Agreement to the “Tranche B-1 Term Loans” shall include the New Tranche B-1 Term Loans made by the Existing Term Lenders to the Borrowers on the Amendment Effective
Date and shall exclude the Tranche B-1 Term Loans (as defined in the Credit Agreement) made by the Existing Term Lenders (as defined in the Credit Agreement) on the Closing Date (which Tranche B-1 Term Loans shall be repaid in full on the Amendment
Effective Date) and (b) references in the Credit Agreement to the “Tranche B-2 Term Loans” shall include the New Tranche B-2 Term Loans made by the Existing Term Lenders to the Borrowers on the Amendment Effective Date and shall
exclude the Tranche B-2 Term Loans (as defined in the Credit Agreement) made by the Existing Term Lenders (as defined in the Credit Agreement) on the Closing Date (which Tranche B-2 Term Loans shall be repaid in full on the Amendment Effective
Date). 
 SECTION 3. Representations and Warranties. To induce the other parties hereto to enter into this Amendment, each of
the Loan Parties represents and warrants to each of the Lenders (including Lenders making the New Tranche B-1 Term Loans and the New Tranche B-2 Term Loans) that, as of the date hereof: 

(a) the representations and warranties set forth in Article IV of the Credit Agreement are true and correct in all material respects on and as
of the date hereof to the same extent as if made on and as of the date hereof, except to the extent such representations and warranties specifically relate to an earlier date, in which case such representations and warranties shall have been true
and correct in all material respects on and as of such earlier date; provided that to the extent any such representation and warranty is already qualified by materiality or Material Adverse Effect, such representation and warranty shall be
true and correct in all respects. 
 (b) each Loan Party has the requisite power and authority to execute and deliver this Amendment and to
perform its obligations under this Amendment and each Loan Document, as amended hereby. The execution and delivery of this Amendment and the performance by each Loan Party of this Amendment and each Loan Document (as amended hereby) to which it is a
party have been duly approved by all necessary organizational action of each such Loan Party; 
 (c) this Amendment has been duly executed
and delivered by each Loan Party that is a party hereto and thereto and this Amendment is the legally valid and binding obligation of such Loan Party thereto, enforceable against such Loan Party in accordance with its terms, except as may be limited
by bankruptcy, insolvency, reorganization, moratorium or similar laws relating to or limiting creditors’ rights generally or by equitable principles relating to enforceability; and 

(d) no Default or Event of Default has occurred and is continuing. 

  
 3 

 SECTION 4. Reaffirmations 

(a) Each Loan Party, subject to the terms and limits contained in the Credit Agreement and in the Security Documents, reaffirms its guaranty of
the Obligations pursuant to the Credit Agreement. Each Loan Party hereby acknowledges that it has reviewed the terms and provisions of this Amendment and consents to the amendment of the Credit Agreement effected pursuant to this Amendment. Each
Loan Party hereby confirms that each Loan Document to which it is a party or is otherwise bound will continue to be in full force and effect as amended by this Amendment and all of its obligations thereunder shall not be impaired or limited by the
execution or effectiveness of this Amendment or the incurrence of the New Tranche B-1 Term Loans and the New Tranche B-2 Term Loans. 
 (b)
Each Loan Party hereby (i) confirms that each Loan Document to which it is a party or is otherwise bound and all Collateral encumbered thereby will continue to secure to the fullest extent possible in accordance with the Loan Documents, the
payment and performance of the Obligations, as the case may be, (ii) confirms its respective grant to the Administrative Agent for the benefit of the Secured Parties of the security interest in and continuing Lien on all of such Loan
Party’s right, title and interest in, to and under all Collateral, in each case whether now owned or existing or hereafter acquired or arising and wherever located, as collateral security for the prompt and complete payment and performance in
full when due, whether at stated maturity, by required prepayment, declaration, acceleration, demand or otherwise, of all applicable Obligations (including all such Obligations as amended, reaffirmed and/or increased pursuant to the Amended Credit
Agreement), subject to the terms contained in the applicable Loan Documents, (iii) confirms its pledges, grants of security interests and other obligations, as applicable, under and subject to the terms of each of the Loan Documents to which it
is a party, and (iv) acknowledges that the Lenders providing New Tranche B-1 Term Loans and New Tranche B-2 Term Loans on the date hereof are “Lenders” and “Secured Parties” for all purposes under the Loan Documents. 

SECTION 5. Amendment Agreement Effectiveness. The effectiveness of this Amendment shall be subject to the following conditions precedent (the
date on which such conditions have been satisfied (or waived) is referred to herein as the “Amendment Effective Date”): 

(a) The Administrative Agent shall have received the following, each of which shall be originals or facsimiles or “.pdf” files
(followed promptly by originals) unless otherwise specified, each properly executed by an Authorized Officer of the signing Loan Party, each dated as of the Amendment Effective Date and each in form and substance reasonably satisfactory to the
Administrative Agent: 
 (i) executed counterparts of this Amendment from the Administrative Agent, each Loan Party and Additional Lenders
providing New Tranche B-1 Term Loan Commitments and New Tranche B-2 Term Loan Commitments sufficient to refinance in full the Term Loans; and 

(ii) a Note executed by the U.S. Borrower in favor of each Lender who shall have requested a Note not less than three Business Days prior to
the Amendment Effective Date. 

  
 4 

 (b) The Administrative Agent shall have received (1) copies of the Organizational Documents
of each Loan Party, as applicable, and, to the extent applicable, certified as of a recent date by the appropriate governmental official, each dated the Amendment Effective Date or a recent date prior thereto; (2) signature and incumbency
certificates of each such Person of each Loan Party executing the Loan Documents to which it is a party; (3) resolutions of the board of directors or similar governing body of each Loan Party approving and authorizing the execution, delivery
and performance of this Amendment, the Amended Credit Agreement and the other Loan Documents to which it is a party or by which it or its assets may be bound as of the Amendment Effective Date, certified as of the Amendment Effective Date by its
secretary or an assistant secretary of such Person as being in full force and effect without modification or amendment; and (4) a good standing certificate from the applicable Governmental Authority of each Loan Party’s jurisdiction of
incorporation, organization or formation and in each jurisdiction in which it is qualified as a foreign corporation or other entity to do business, each dated a recent date prior to the Amendment Effective Date (except with respect to any
jurisdiction where the failure to be so qualified would not reasonably be expected to have a Material Adverse Effect); provided that, in lieu of delivery of each of the documents set forth in clauses (1) and (2) above, each applicable Loan
Party may deliver a certificate executed by an Authorized Officer of such Loan Party certifying that there have been no material amendments to those documents previously delivered to the Administrative Agent on the Amendment Effective Date pursuant
to Section 3.01(b)(1) and 3.01(b)(2) of the Credit Agreement; provided, further, that any change to any incumbency certificate previously delivered to the Administrative Agent on the Amendment Effective Date shall be deemed material. 

(c) The Agents and the Lenders and their respective counsel shall have received executed copies of the favorable written opinions of Kaye
Scholer LLP, Calfee, Halter & Griswold LLP, Varnum, as special Michigan counsel to the Loan Parties, DLA Piper LLP (U.S.), as special Texas counsel for the Loan Parties and Gray Plant Mooty, as special Minnesota counsel for the Loan
Parties, each dated as of the Amendment Effective Date and otherwise in form and substance reasonably satisfactory to the Administrative Agent (and each Loan Party hereby instructs such counsel to deliver such opinions to the Agents and the
Lenders). 
 (d) The U.S. Borrower shall have delivered to the Administrative Agent a fully executed Borrowing Notice no later than one
(1) Business Day prior to the Amendment Effective Date. Promptly upon receipt by the Administrative Agent of such Borrowing Notice, the Administrative Agent shall notify each Additional Lender of the proposed borrowing. 

(e) On the Amendment Effective Date, (i) after giving effect to the consummation of the Refinancing and any rights of contribution,
Holdings and its Subsidiaries, on a consolidated basis, is and shall be Solvent, and (ii) the Administrative Agent shall have received a fully executed Solvency Certificate. 

(f) No Default or Event of Default shall exist, or would result from the execution and delivery of this Amendment, from the Refinancing and the
related Credit Extensions. 
 (g) The representations and warranties of the Loan Parties made pursuant to Section 3 of this Amendment
shall be true and correct as of the Amendment Effective Date. 

  
 5 

 (h) The Borrower Representative shall have delivered to the Administrative Agent an executed
Amendment Effective Date Certificate which shall include certifications to the effect that each of the conditions precedent described in this Section shall have been satisfied on the such date (except that no opinion need be expressed as to
Administrative Agent’s satisfaction with any document, instrument or other matter). 
 (i) The Borrowers shall have paid to the
Administrative Agent for its own account or for the account of the Lenders, as applicable, all fees and expenses required to be paid in connection herewith (including expenses to the extent invoiced at least one (1) Business Day prior to the
Amendment Effective Date). 
 (j) The Administrative Agent shall have received a prepayment notice issued by the Borrower Representative in
accordance with Section 2.13(a) of the Credit Agreement indicating (i) the anticipated date of such prepayments, and (ii) the Borrower’s intention to repay in full of the Term Loans on the terms set forth in this Amendment. 

(k) The U.S. Borrower shall have paid to the Administrative Agent on the Amendment Effective Date, for the account of the Existing Term
Lenders, all outstanding principal amounts under, and all accrued and unpaid interest on, the Term Loans of each Existing Term Lender to, but not including the date of such prepayment. 

SECTION 6. Effect of Amendment. (a) On and after the Amendment Effective Date, each reference to the Credit Agreement in
any Loan Document shall be deemed to be a reference to the Credit Agreement as amended by this Amendment (as so amended, the “Amended Credit Agreement”). Except as expressly provided in this Amendment, nothing herein shall be deemed
to entitle any Loan Party to a consent to, or a waiver, amendment, modification or other change of, any of the terms, conditions, obligations, covenants or agreements contained in the Credit Agreement or any other Loan Document in similar or
different circumstances. On and after the Amendment Effective Date, this Amendment shall constitute a “Loan Document” for all purposes of the Credit Agreement and the other Loan Documents. On and after the Amendment Effective Date, as used
in the Credit Agreement, the terms “Agreement”, “this Agreement”, “herein”, “hereinafter”, “hereto”, “hereof”, and words of similar import shall, unless the context otherwise requires, mean
the Amended Credit Agreement. 
 (b) The U.S. Borrower agrees that each Consent and Cashless Roll Election (each, a
“Consent”) executed by a Lender shall satisfy any requirement under Section 10.06 of the Credit Agreement to effectuate an Amendment Agreement (as defined in the Credit Agreement) in connection with the transactions
contemplated by this Amendment and each Consent. On and after the Amendment Effective Date, each Consent shall constitute a “Loan Document” for all purposes of the Credit Agreement and the other Loan Documents. 

SECTION 7. Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed and delivered shall be deemed an original, but all such counterparts together shall constitute but one and the same contract. Delivery of an executed counterpart of a signature page of this
Amendment by facsimile or other customary means of electronic transmission (e.g., “.pdf”) shall be as effective as delivery of a manually executed counterpart hereof. 

  
 6 

 SECTION 8. Applicable Law. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HERETO SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW PRINCIPLES THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAW OF
THE STATE OF NEW YORK. 
 SECTION 9. Submission to Jurisdiction. Section 10.15 of the Credit Agreement is hereby incorporated by
reference. 
 SECTION 10. Headings. The headings of this Amendment are for purposes of reference only and shall not limit or
otherwise affect the meaning hereof. 
 [Remainder of page intentionally left blank] 

  
 7 

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

			
	FAIRMOUNT MINERALS, LTD.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	LAKE SHORE SAND COMPANY (ONTARIO) LTD.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

 [Fairmount Minerals First Amendment Signature Page] 

 
			
	FAIRMOUNT MINERALS HOLDINGS, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	BEST SAND CORPORATION
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	BEST SAND OF PENNSYLVANIA, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	CHEYENNE SAND CORP.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	CONSTRUCTION AGGREGATES CORPORATION OF MICHIGAN, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FAIRMOUNT WATER SOLUTIONS, LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

 [Fairmount Minerals First Amendment Signature Page] 

 
			
	MINERAL VISIONS INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	SPECIALTY SANDS, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	STANDARD SAND CORPORATION
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	TECHNIMAT LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	TECHNISAND, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	WEDRON SILICA COMPANY
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

 [Fairmount Minerals First Amendment Signature Page] 

 
			
	WEXFORD SAND CO.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	WISCONSIN INDUSTRIAL SAND COMPANY, LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	WISCONSIN SPECIALTY SANDS, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	ALPHA RESINS, LLC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	BLACK LAB LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FAIRMOUNT MINERALS, LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

 [Fairmount Minerals First Amendment Signature Page] 

 
			
	SELF-SUSPENDING PROPPANT LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	SHAKOPEE SAND LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FML ALABAMA RESIN, INC.
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FML SAND, LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FML RESIN, LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

  

			
	FML TERMINAL LOGISTICS LLC
		
	By:	 	/s/ Christopher L. Nagel
		 	 Name: Christopher L. Nagel
 Title: Chief
Financial Officer

 [Fairmount Minerals First Amendment Signature Page] 

 
			
	BARCLAYS BANK PLC, as Administrative Agent and Lender
		
	By:	 	/s/ Paul Cugno
		 	 Name: Paul Cugno
 Title: Managing
Director

 [Fairmount Minerals First Amendment Signature Page] 

 ANNEX A 

New Tranche B-1 Term Loan Commitments 
  

			
	 New Tranche B-1 Term Loan Lender
	  	 Commitment

	Barclays Bank PLC	  	$324,187,500.00
		  	Total: $324,187,500.00

 New Tranche B-2 Term Loan Commitments 

 

			
	 New Tranche B-2 Term Loan Lender
	  	 Commitment

	Barclays Bank PLC	  	$923,787,500.00
		  	Total: $923,787,500.00EX-10.4

 Exhibit 10.4 

Execution Version 
 JOINDER
AGREEMENT 
 THIS JOINDER AGREEMENT, dated as of February 14, 2014 (this “Agreement”), by and among
Barclays Bank PLC (the “Incremental Term Loan Lender”), Fairmount Minerals, Ltd., as borrower representative (in such capacity, the “Borrower Representative”) and Barclays Bank PLC (“Barclays”), as
Administrative Agent (together with its successors and permitted assigns, the “Administrative Agent”). This Joinder Agreement shall constitute a “Loan Document” for all purposes of the Credit Agreement (as defined below)
and the other Loan Documents. 
 RECITALS: 

WHEREAS, reference is hereby made to that certain Second Amended and Restated Credit and Guaranty Agreement, dated as of
September 5, 2013 (as it may be amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement’’; the terms defined therein and not otherwise defined herein being used herein as therein
defined), by and among Fairmount Minerals Holdings, Inc., Fairmount Minerals, Ltd. (the “U.S. Borrower”), certain Subsidiaries of the U.S. Borrower party thereto as guarantors, Lake Shore Sand Company (Ontario) Ltd. (the
“Canadian Borrower”), the Lenders party thereto from time to time, KeyBank National Association, as Syndication Agent, Barclays Bank PLC, as Administrative Agent and Collateral Agent, Barclays Bank PLC, as Revolving Administrative
Agent and PNC Bank, National Association and Wells Fargo Securities, LLC, as Co-Documentation Agents; and 
 WHEREAS, subject to the
terms and conditions of the Credit Agreement, the Borrower Representative may request an increase to the existing Revolving Commitments or Term Loans and/or the establishment of Incremental Term Loan Commitments, with such increase or establishment
becoming effective by the Borrower Representative entering into one or more Joinder Agreements with the Incremental Term Loan Lender and/or Incremental Revolving Loan Lender(s), as applicable, and the Administrative Agent. 

NOW, THEREFORE, in consideration of the premises and agreements, provisions and covenants herein contained, the parties hereto agree as
follows: 
 The Incremental Term Loan Lender hereby agrees to commit to provide its Commitment as set forth on Schedule A annexed hereto, on
the terms and subject to the conditions set forth herein and in the Credit Agreement. 
 The Incremental Term Loan Lender (i) confirms
that it has received a copy of the Credit Agreement and the other Loan Documents, together with copies of the financial statements referred to therein and such other documents and information as it has deemed appropriate to make its own credit
analysis and decision to enter into this Agreement; (ii) agrees that it will, independently and without reliance upon the Administrative Agent or any other Lender or Agent and based on such documents and information as it shall deem appropriate
at the time, continue to make its own credit decisions in taking or not taking action under the Credit Agreement; (iii) appoints and authorizes Administrative Agent and Collateral Agent to take such action as agent on its behalf and to exercise
such powers under the Credit Agreement and the other Loan Documents as are delegated to Administrative Agent and Collateral Agent, as the case may be, by the terms thereof, together with such powers as are reasonably incidental thereto; and
(iv) agrees that it will perform in accordance with their terms all of the obligations which by the terms of the Credit Agreement are required to be performed by it as a Lender. 

The Incremental Term Loan Lender hereby agrees to extend Term Loans to the U.S. Borrower on the following terms and conditions and in
accordance with the terms and provisions of the Credit Agreement. 

	1.	Amount and Type of Incremental Term Loans. In accordance with Section 2.24 of the Credit Agreement, the Borrower Representative has requested an Incremental Term Loan in the amount of $41,000,000 to be made
to the U.S. Borrower on February 14, 2014 (the “Increased Amount Date”). 

  

									
	 a.
	  	Interest rate option:	  	 ̈	  	a.	  	Base Rate Loan(s)
		  		  	x	  	b.	  	Eurodollar Rate Loans with an initial Interest Period ending on March 31, 2014

  

	2.	Incremental Term Loan: 

 a. The parties hereto hereby acknowledge and agree that the term
loans made on Increased Amount Date (the “Incremental Term Loans”) shall not constitute a separate Class of Term Loans, but shall instead be part of the same Class as the Tranche B-2 Term Loans made on the Restatement Date. Each of
the parties hereto hereby agrees that the Administrative Agent may take any and all action as may be reasonably necessary to ensure that all such Incremental Term Loans may be treated as such Tranche B-2 Term Loans for all purposes under the Loan
Documents. 
 b. The Stated Maturity Date for the Incremental Term Loans shall be September 5, 2019. 

 

	3.	Applicable Margin. 

  

	 	i.	Base Rate Loans: The Applicable Margin for each Incremental Term Loan that is a Base Rate Loan shall mean, as of any date of determination, 3.00% per annum. 

 

	 	ii.	Eurodollar Rate Loans: The Applicable Margin for each Incremental Term Loan that is a Eurodollar Rate Loan shall mean, as of any date of determination, 4.00% per annum. 

 

	4.	Principal Payments. The U.S. Borrower shall repay the Incremental Term Loans in full on the Tranche B-2 Term Loan Maturity Date 

 

	5.	Voluntary and Mandatory Prepayments. Scheduled installments of principal of the Incremental Term Loans set forth above shall be reduced in connection with any voluntary or mandatory prepayments of the Incremental
Term Loans in accordance with Sections 2.13, 2.14 and 2.15 of the Credit Agreement; provided further, that the Incremental Term Loans and all other amounts under the Credit Agreement with respect to the Incremental Term Loans shall be
paid in full no later than the Tranche B-2 Term Loan Maturity Date. 

 In addition, the principal amount of Incremental
Term Loans, together with the existing Tranche B-2 Term Loans shall be repaid in consecutive quarterly installments in an aggregate amount equal to $2,315,256.89 with the next payment on March 31, 2014 and then quarterly thereafter as
provided in Section 2.12 of the Credit Agreement and Section 2.12 of the Credit Agreement is hereby amended to reflect such amounts as the Installments of Tranche B-2 Term Loans payable on each Installment Date commencing on
March 31, 2014 as set forth therein and that the unpaid balance of all Tranche B-2 Term Loans, including the Incremental Term Loans hereunder, shall be due and payable on the Maturity Date. 

 

	6.	Prepayment Fees. The Incremental Term Loans shall be subject to the same call protection as the other Tranche B-2 Term Loans as set forth in Section 2.13(e) of the Credit Agreement, which call
protection shall expire six months after the Restatement Date. 

  
 2 

	7.	Other Fees. The U.S. Borrower agrees to pay the Incremental Term Loan Lender, on the Effective Date (as herein defined), a fee equal to 0.50% of the principal amount of the Incremental Term Loan funded on the
Increased Amount Date. 

  

	8.	Incremental Lenders. The Incremental Term Loan Lender acknowledges and agrees that upon its execution of this Agreement and the making of Incremental Term Loans that the Incremental Term Loan Lender shall become
a “Lender” under, and for all purposes of, the Credit Agreement and the other Loan Documents, and shall be subject to and bound by the terms thereof, and shall perform all the obligations of and shall have all rights of a Lender
thereunder. 

  

	9.	Credit Agreement Governs. Except as set forth in this Agreement, the Incremental Term Loans shall otherwise be subject to the terms and provisions of the Credit Agreement and the other Loan Documents.

  

	10.	Conditions Precedent. The effectiveness of this Agreement and the commitments of the Incremental Term Loan Lender hereunder are subject to the satisfaction of the following conditions on or prior to
February 14, 2014 (the “Effective Date”): 

  

	 	i.	The Administrative Agent and the Incremental Term Loan Lender shall have received a satisfactory legal opinion of Kaye Scholer LLP and other documents reasonably requested by Administrative Agent in connection with this
Agreement; 

  

	 	ii.	The representations and warranties and other certifications set forth in Section 11 hereof shall be true and correct as of the Effective Date; and 

 

	 	iii.	Such other confirmations, documents and certifications as reasonably requested by the Administrative Agent. 

  

	11.	Borrower’s Certifications. By its execution of this Agreement, the undersigned officer, to the best of his or her knowledge, and the U.S. Borrower hereby represents and warrants that: 

 

	 	i.	The representations and warranties contained in the Credit Agreement and the other Loan Documents are true and correct in all material respects on and as of the date hereof to the same extent as though made on and as of
the date hereof, except to the extent such representations and warranties specifically relate to an earlier date, in which case such representations and warranties were true and correct in all material respects on and as of such earlier date;
provided, that to the extent any such representation or warranty is already qualified by materiality or material adverse effect, such representation or warranty is true and correct in all respects; 

 

	 	ii.	No Default or Event of Default exists on such Increased Amount Date before or after giving effect to the Proposed Borrowing contemplated hereby; 

 

	 	iii.	As of the date hereof, the undersigned officer of the Borrower Representative hereby certifies that the conditions to lending specified in Section 3.02(a)(ii)(iv) of the Credit Agreement have been or will be, as
the case may be, satisfied (or waived in accordance with the Credit Agreement); 

  

	 	iv.	The U.S. Borrower has performed in all material respects all agreements and satisfied all conditions which the Credit Agreement provides shall be performed or satisfied by it on or before the date hereof; and

  
 3 

	 	v.	The U.S. Borrower is in pro forma compliance with each of the covenants set forth in Section 6.07 of the Credit Agreement as of the last day of the most recently ended Fiscal Quarter after giving effect to such
Incremental Term Loan Commitments, the calculations of which are set forth in reasonable detail on Annex A attached hereto. 

  

	 	vi.	The execution, delivery and performance of this Agreement have been duly authorized by all necessary corporate or other organizational action on the part of the Borrower Representative. 

 

	 	vii.	This Agreement has been duly executed and delivered by the Borrower Representative and is the legally valid and binding obligation of the Borrower Representative, enforceable against the Borrower Representative in
accordance with its respective terms, except as may be limited by bankruptcy, insolvency, reorganization, moratorium or similar laws relating to or limiting creditors’ rights generally or by equitable principles relating to enforceability.

  

	12.	Eligible Assignee. By its execution of this Agreement, the Incremental Term Loan Lender represents and warrants that it is an Eligible Assignee. 

 

	13.	Notice. For purposes of the Credit Agreement, the initial notice address of the Incremental Term Loan Lender shall be as set forth below its signature below, which may be changed in accordance with
Section 10.01 of the Credit Agreement. 

  

	14.	Non-U.S. Lenders. If the Incremental Term Loan Lender is a Non-U.S. Lender, delivered herewith to the Administrative Agent are such
forms, certificates or other evidence with respect to United States federal income tax withholding matters as the Incremental Term Loan Lender may be required to deliver to the Administrative Agent pursuant to subsection 2.20(c) of the Credit
Agreement. 

  

	15.	Recordation of the New Loans. Upon execution and delivery hereof, the Administrative Agent will record the Incremental Term Loans made by the Incremental Term Loan Lender in the Term Loan Register.

  

	16.	Amendment, Modification and Waiver. This Agreement may not be amended, modified or waived except by an instrument or instruments in writing signed and delivered on behalf of each of the parties hereto.

  

	17.	Entire Agreement. This Agreement, the Credit Agreement and the other Loan Documents constitute the entire agreement among the parties hereto with respect to the subject matter hereof and thereof and supersede all
other prior agreements and understandings, both written and verbal, among the parties or any of them with respect to the subject matter hereof. 

  

	18.	GOVERNING LAW. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICT OF LAW PRINCIPLES THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAW OF THE STATE OF NEW YORK. 

  

	19.	Severability. Any term or provision of this Agreement which is invalid or unenforceable in any jurisdiction shall, as to that jurisdiction, be ineffective to the extent of such invalidity or unenforceability
without rendering invalid or unenforceable the remaining terms and provisions of this Agreement or affecting the validity or enforceability of any of the terms or provisions of this Agreement in any other jurisdiction. If any provision of this
Agreement is so broad as to be unenforceable, the provision shall be interpreted to be only so broad as would be enforceable. 

  
 4 

	20.	Counterparts. This Agreement may be executed in counterparts, each of which shall be deemed to be an original, but all of which shall constitute one and the same agreement. Delivery of an executed counterpart of
a signature page to this Agreement by facsimile or other electronic transmission will be effective as delivery of a manually executed counterpart thereof. 

[Remainder of page intentionally left blank] 

  
 5 

 IN WITNESS WHEREOF, each of the undersigned has caused its duly authorized officer to
execute and deliver this Joinder Agreement as of the date first written above. 
  

			
	BARCLAYS BANK PLC
		
	By:	 	/s/ Kevin Crealese
	Name: Kevin Crealese
	Title: Managing Director
		 	
	Notice Address:
		 	
	 Barclays Bank PLC
 745 Seventh
Avenue
 New York, NY 10019
 Attention: Vanessa Kurbatskiy

Telephone: (212) 526-2799
 Facsimile:
(212) 526-5115

  
 [Signature Page to
Joinder Agreement] 

 
			
	FAIRMOUNT MINERALS, LTD., as Borrower Representative
		
	By:	 	/s/ Christopher L. Nagel
	Name: Christopher L. Nagel
	Title: Chief Financial Officer

  
 [Signature Page to
Joinder Agreement] 

			
	 Consented to by:
  

BARCLAYS BANK PLC,
 as Administrative Agent

		
	By:	 	/s/ Kevin Crealese
	Name: Kevin Crealese
	Title: Managing Director

  
 [Signature Page to
Joinder Agreement] 

 SCHEDULE A 

TO JOINDER AGREEMENT 
  

					
	 Name of Lender
	 	 Type of Commitment
	 	 Amount

	 Barclays Bank PLC
	 	 Incremental Term Loan
 Commitment for Tranche
B-2 Term Loans
	 	$41,000,000
		 		 	Total: $41,000,000

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