EX-10.3G



 Exhibit 10.3G 

September 23, 2013 
 Advanced Drainage
Systems, Inc. 
 4640 Trueman Blvd. 
 Hilliard, OH 43026 

Re: Amendment No. 6 to Amended and Restated Private Shelf Agreement 

Ladies and Gentlemen: 
 Reference is made to that
certain Amended and Restated Private Shelf Agreement, dated as of September 24, 2010, as amended by that certain Amendment No. 1 to Amended and Restated Private Shelf Agreement dated December 12, 2011, Limited Waiver and Amendment
No. 2 to Amended and Restated Private Shelf Agreement dated March 9, 2012, Amendment No. 3 to Amended and Restated Private Shelf Agreement dated March 30, 2012, Amendment No. 4 to Amended and Restated Private Shelf Agreement
dated April 26, 2013 and Amendment No. 5 to Amended and Restated Private Shelf Agreement dated June 12, 2013, including the Supplement thereto dated June 24, 2013 (as so amended, the “Note Agreement”), between
Advanced Drainage Systems, Inc., a Delaware corporation (the “Company”), on one hand, and Prudential Investment Management, Inc. (“Prudential”) and each other Prudential Affiliate as therein defined which becomes
bound by certain provisions thereof as therein provided, on the other hand. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Note Agreement. 

The Company has requested amendments to the Note Agreement as set forth below and Prudential and the holders of the Notes executing this
letter are willing to agree to such amendments on the terms and conditions set forth herein. Accordingly, and in accordance with the provisions of paragraph 11C of the Note Agreement, the parties hereto agree as follows: 

SECTION 1. Amendments. From and after the Effective Date (as defined in Section 3 hereof) the parties hereto agree
that the Note Agreement is amended as follows: 
 1.1. Clause (iv) of paragraph 6B is hereby amended and restated to read as follows:

 “(iv)(a) The Required Interest Rate Hedge (as defined in paragraph 5M of this Agreement prior to Amendment No. 5
to this Agreement), (b) any other Interest Rate Hedge approved by the Required Holders, or (c) any other Indebtedness under (1) any Other Lender Provided Financial Services Product so long as the Intercreditor Agreement shall be in
full force and effect with respect thereto or (2) under any currency swap or hedging arrangement or commodity hedging arrangement with a counterparty other than the Bank Agent or a Bank; provided, however, that the Company and its Subsidiaries
shall enter into the Required Interest Rate Hedge, any other Interest Rate Hedge, any Other Lender Provided Financial Services Product, and any currency swap or hedging arrangement or commodity hedging arrangement for hedging (rather than
speculative) purposes.” 







 SECTION 2. Representations and Warranties. The Company represents and warrants to
Prudential and each holder of a Note that (i) the execution and delivery of this letter agreement has been duly authorized by all necessary corporate action on behalf of the Company and each Guarantor, (ii) this letter agreement has been
executed and delivered by a duly authorized officer of the Company and each Guarantor, (iii) the Company and each Guarantor has obtained all authorizations, consents, and approval necessary for the execution, delivery and performance of this
letter agreement and such authorizations, consents and approval are in full force and effect and (iv) after giving effect hereto (a) each representation and warranty set forth in paragraph 8 of the Note Agreement is true and correct as of
the date of the execution and delivery of this letter by the Company with the same effect as if made on such date (except to the extent that such representations and warranties expressly refer to an earlier date, in which case they were true and
correct as of such earlier date and except that the representation and warranty set forth in: (1) paragraph 8D shall be interpreted to be addressing only the Company and its Material Subsidiaries, (2) paragraph 8F shall be interpreted to
be addressing only the Company and its Material Subsidiaries and (3) paragraph 8Q shall be interpreted to be addressing only the Company and the Guarantors, and (b) no Event of Default or Default exists. 

SECTION 3. Conditions Precedent. The amendments in Section 1 of this letter agreement shall become effective on the date
(the “Effective Date”) that each of the following conditions has been satisfied: 
 3.1. Documents. Prudential
and each holder of a Note shall have received original counterparts of this letter agreement executed by Prudential, the Required Holders, the Company and each Guarantor. 

3.2. Representations. All statements set forth in Section 2 shall be true and correct as of the Effective Date, except to the
extent that any such statement expressly relates to an earlier date (in which case such statement was true and correct on and as of such earlier date). 

3.3. Proceedings. All corporate and other proceedings taken or to be taken in connection with the transactions contemplated by
this letter agreement shall be satisfactory to Prudential and each holder of a Note and its counsel, and Prudential and each holder of a Note shall have received all such counterpart originals or certified or other copies of such documents as they
may reasonably request. 
 SECTION 4. Reference to and Effect on Note Agreement; Ratification of Note Agreement. Upon the
effectiveness of the amendments to the Note Agreement made in this letter agreement, each reference to the Note Agreement in any other document, instrument or agreement shall mean and be a reference to the Note Agreement as modified by this letter.
Except as specifically set forth in Section 1 hereof, the Note Agreement shall remain in full force and effect and is hereby ratified and confirmed in all respects. Except as specifically stated in this letter, the execution, delivery and
effectiveness of this letter shall not (a) amend the Note Agreement or any Note, (b) operate as a waiver of any right, power or remedy of any holder of a 

  
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Note, or (c) constitute a waiver of, or consent to any departure from, any provision of the Note Agreement or Note at any time. Nothing contained in this letter agreement shall be construed
as a course of dealing or other implication that Prudential and any holder of a Note has agreed to or is prepared to grant any consents or agree to any amendments to the Note Agreement or any Note in the future, whether or not under similar
circumstances. 
 SECTION 5. Expenses. The Company hereby confirms its obligations under the Note Agreement, whether or not
the transactions hereby contemplated are consummated, to pay, promptly after request by Prudential or any holder of a Note, all reasonable out-of-pocket costs and expenses, including attorneys’ fees and expenses, incurred by Prudential or such
holder of a Note in connection with this letter agreement or the transactions contemplated hereby, in enforcing any rights under this letter agreement, or in responding to any subpoena or other legal process or informal investigative demand issued
in connection with this letter agreement or the transactions contemplated hereby. The obligations of Company under this Section 5 shall survive transfer by any holder of a Note of any Note and payment of any Note. 

SECTION 6. Governing Law. THIS LETTER SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE
GOVERNED BY, THE LAW OF THE STATE OF NEW YORK (EXCLUDING ANY CONFLICTS OF LAW RULES WHICH WOULD OTHERWISE CAUSE THIS AGREEMENT TO BE CONSTRUED OR ENFORCED IN ACCORDANCE WITH, OR THE RIGHTS OF THE PARTIES TO BE GOVERNED BY, THE LAWS OF ANY OTHER
JURISDICTION). 
 SECTION 7. Reaffirmation. Each Guarantor hereby consents to the foregoing amendment to the Note
Agreement and hereby ratifies and reaffirms all of their payment and performance obligations, contingent or otherwise, under the Guaranty Agreement after giving effect to such amendment. Each Guarantor hereby acknowledges that, notwithstanding the
foregoing amendment, that the Guaranty Agreement remains in full force and effect and is hereby ratified and confirmed. Without limiting the generality of the foregoing, each Guarantor agrees and confirms that the Guaranty Agreement continues to
guaranty the Guarantied Obligations (as defined in the Guaranty Agreement) arising under or in connection with the Note Agreement or any of the Shelf Notes, as the same are amended by this letter agreement. 

SECTION 8. Counterparts; Section Titles. This letter 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 to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature
page to this letter by facsimile shall be effective as delivery of a manually executed counterpart of this letter. The section titles contained in this letter are and shall be without substance, meaning or content of any kind whatsoever and are not
a part of the agreement between the parties hereto. 

  
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	Very Truly Yours,
	
	PRUDENTIAL INVESTMENT MANAGEMENT, INC.
		
	By:	 	 /s/ David Quackenbush

		 	Vice President
	
	THE PRUDENTIAL INSURANCE COMPANY OF AMERICA
		
	By:	 	 /s/ David Quackenbush

		 	Vice President
	
	 PRUDENTIAL RETIREMENT INSURANCE

    AND ANNUITY COMPANY

		
	By:	 	 Prudential Investment Management, Inc.,
 as
investment manager

		
	By:	 	 /s/ David Quackenbush

		 	Vice President
	
	PRUCO LIFE INSURANCE COMPANY
		
	By:	 	 /s/ David Quackenbush

		 	Vice President


 AMENDMENT NO. 6 TO AMENDED AND RESTATED PRIVATE SHELF AGREEMENT 







 Accepted and Agreed: 
  

			
	COMPANY:
	
	ADVANCED DRAINAGE SYSTEMS, INC.
		
	By:	 	 /s/ Mark B. Sturgeon

	Name:	 	Mark B. Sturgeon
	Title:	 	Secretary and Treasurer

  

			
	GUARANTORS:
	
	STORMTECH LLC
		
	By:	 	 /s/ Mark B. Sturgeon

	Name:	 	Mark B. Sturgeon
	Title:	 	Secretary and Treasurer

 AMENDMENT NO. 6 TO AMENDED AND RESTATED PRIVATE SHELF AGREEMENT