Document:

EX-4.16

 Exhibit 4.16 

EXECUTION VERSION 

FOURTH SUPPLEMENTAL INDENTURE 

Fourth Supplemental Indenture (this “Supplemental Indenture”), dated as of February 3, 2016, among Pelican Asphalt
Company LLC, a Texas limited liability company (the “Guaranteeing Subsidiary”), an indirect subsidiary of Summit Materials, LLC, a Delaware limited liability company (the “Issuer”), and Wilmington Trust, National
Association, a national banking association, as trustee (the “Trustee”), Transfer Agent, Registrar and Paying Agent. 
 W I
T N E S S E T H 
 WHEREAS, the Issuer, Summit Materials Finance Corp., a Delaware corporation (together with the Issuer, the
“Issuers”), and the Guarantors have heretofore executed and delivered to the Trustee an Indenture (the “Indenture”), dated as of July 8, 2015, providing for the issuance of 6.125% Senior Notes due 2023 (the
“Notes”), as supplemented by that First Supplemental Indenture, dated as of July 17, 2015, as further supplemented by that Second Supplemental Indenture, dated as of October 7, 2015, and as further supplemented by that
Third Supplemental Indenture, dated as of November 19, 2015; 
 WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the
terms and conditions set forth herein and under the Indenture (the “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, the parties mutually covenant and agree for the equal and ratable benefit of the Holders 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 acknowledges that it has received and reviewed a copy of the Indenture and all
other documents it deems necessary to review in order to enter into this Supplemental Indenture, and acknowledges and agrees to (i) join and become a party to the Indenture as indicated by its signature below; (ii) be bound by the
Indenture, as of the date hereof, as if made by, and with respect to, each signatory hereto; and (iii) perform all obligations and duties required of a Guarantor pursuant to the Indenture. The Guaranteeing Subsidiary hereby agrees to provide an
unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture, including, but not limited to, Article 10 thereof. 

(3) Execution and Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding
the absence of the endorsement of any notation of such Guarantee on the Notes. 
 (4) No Recourse Against Others. No past, present or
future director, officer, employee, incorporator, member, partner or stockholder of the Issuers or any Guaranteeing Subsidiary shall have any liability for any obligations of the Issuers or the Guarantors (including the Guaranteeing Subsidiary)
under the Notes, any 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 by accepting Notes waives and releases all such liability. The
waiver and release are part of the consideration for issuance of the Notes. 

 (5) Governing Law. THIS SUPPLEMENTAL INDENTURE, AND ANY CLAIM, CONTROVERSY OR DISPUTE
ARISING UNDER OR RELATED TO THIS SUPPLEMENTAL INDENTURE, WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

(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. This Supplemental Indenture may be executed in multiple counterparts which, when taken together, shall constitute one instrument. The exchange of copies of this Supplemental Indenture and of
signature pages by facsimile or PDF transmissions shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture for all purposes. Signatures
of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. 
 (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 Subsidiary. 
 (9) Benefits Acknowledged. The Guaranteeing Subsidiary’s Guarantee is subject to the terms and
conditions set forth in the Indenture. The Guaranteeing Subsidiary acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee
and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such benefits. 
 (10) Successors. All
agreements of the Guaranteeing Subsidiary in this Supplemental Indenture shall bind its Successors, except as otherwise provided in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors.

 [Signatures on following page] 

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

			
	PELICAN ASPHALT COMPANY LLC
		
	By:	 	/s/ Christopher Gaskill
		 	Name: Christopher Gaskill
		 	Title: Assistant Secretary

  
 [Signature Page to Fourth
Supplemental Indenture] 

 
			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee
		
	By:	 	/s/ Joseph O’Donnell
		 	Name: Joseph O’Donnell
		 	Title: Vice President

  
 [Signature Page to Fourth
Supplemental Indenture]EX-10.30

 Exhibit 10.30 

Summit Materials, LLC 

2900 K Street, NW #150 • Harbourside Building, North Tower • Washington, DC 20007 

P: 202-339-9509 • F: 202-339-9517 
 August
14, 2009 
 Mr. Damian Murphy 
 10701 West 163rd Street 

Overland Park, KS 
 66062 

Subject:     Offer of Employment as Regional President 

Dear Mr. Murphy: 
 I am pleased to confirm our offer of
employment as a Regional President of Summit Materials, LLC (the “Company’’), as set forth in this letter agreement (this “Letter Agreement”). This Letter Agreement will be effective upon your commencement of employment with
the Company, which is expected to be on or about September 1, 2009 (the “Effective Date”). 
 We believe that the Company will offer you a
rewarding and challenging career opportunity, and we look forward to working with you. 
 Compensation and Benefits 

Your compensation and benefits are as set forth below. 
  

	 	a.	Annual Base Salary: You will receive an annual base salary of $250,000 (the “Base Salary”), payable in installments, in accordance with the Company’s standard payroll procedures. Your Base Salary
will be considered for adjustment in succeeding years as part of our normal year-end performance management and compensation process. 

  

	 	b.	Annual Bonus: You will be eligible for an annual bonus subject to such annual targets (which may include, but are not limited to, targets related to your performance and the Company’s financial
performance) as the Company may establish from time to time. For 2009, you will be entitled to a guaranteed minimum bonus of $125,000, payable in February 2010, subject to your continued employment with the Company through the date the bonus is
payable. Payment will be made by February 15th, 2010. 

  

	 	c.	Vacation: You will be entitled to four weeks of vacation annually, prorated in your first year, in accordance with Company policy. 

 

	 	d.	Automobile Allowance: You will be entitled to an automobile allowance equivalent to or improved upon your current allowance (to be discussed). 

 

	 	e.	Benefit Programs: You and your eligible family members are eligible for participation in employee benefit plans, policies and programs provided by the Company, on such terms and conditions as are generally
provided to similarly-situated employees of the Company from time-to-time. Such plans will be initially equivalent to or improved upon current benefits received. 

 Equity Interest 

You will also be granted Class D equity interests in the Company equal to seven percent of the Class D equity interests currently available for grant to
employees. The grants will be subject to the same vesting and other terms and conditions as current grants to other senior executives of the Company. 

Effect of Termination of Employment 
 Your
employment with the Company will be “at-will,” which means that you may leave the Company, or the Company may require you to leave its employ, for any reason, or no reason, at any time, except as otherwise required by law. Regardless of
the reason for your termination of employment, you will be entitled to payment of your accrued but unpaid base salary and vacation to your termination date. 

In addition, if the Company terminates your employment at any time without Cause (as defined below), you will be entitled to payment of the following: (A) two
years of Base Salary, plus (B) if you are terminated before the second anniversary of the Effective Date, the Base Salary that would have been payable to you through such second anniversary had you remained in employment with the Company. These
severance payments will be made in accordance with the Company’s normal payroll procedures, and are subject to your execution and non-revocation of a general release and waiver in a form acceptable to the Company that you execute within
twenty-one (21) working days following the date your employment terminates. 
 For purposes of this Letter Agreement, “Cause” shall mean: (A) your
willful misconduct in the performance of your duties as an employee. (B) your continued failure after notice, or refusal, to perform your duties as an employee (other than due to your illness), (C) your material violation of a reasonable written
code of conduct applicable to you as an employee, or (D) your conviction of, or plea of nolo contendere to, a felony, or of any other crime involving moral turpitude. 

Performance of Duties 
 You will devote your
attention and time during working hours to the business of the Company and use your best efforts to perform such duties and responsibilities, as are consistent with your position and as shall, from time to time, be reasonably assigned to you by the
Company’s management. 
 Other Terms 
  

	 	a.	Assignment of this Agreement. This Letter Agreement is personal to you and shall not be assignable by you without the prior written consent of an authorized employee of the Company. This Letter Agreement shall
inure to the benefit of, and be binding upon, the Company and its successors and assigns. The Company may assign this Letter Agreement to any affiliate or successor upon your approval. Such approval shall not be unreasonably withheld.

  

	 	b.	Merger of Terms. This Letter Agreement supersedes all prior discussions and agreements between you and the Company with respect to the subject matters covered in this Letter Agreement. 

	 	c.	Severability; Captions. In the event that any provision of this Letter Agreement is determined to be invalid or unenforceable, in whole or in part, the remaining provisions of this Letter Agreement will be
unaffected thereby and will remain in full force and effect to the fullest extent permitted by law. The captions of this Letter Agreement are not part of the provisions of this Letter Agreement and will have no force or effect. 

 

	 	d.	Governing Law; Amendments. This Letter Agreement shall be governed by and construed in accordance with the laws of the state of New York, without regard to conflicts of laws principles thereof that would direct
the application of the laws of any other jurisdiction. This Letter Agreement may not be amended or modified other than by a written agreement executed by you and an authorized employee of the Company. 

 

	 	e.	Withholding Requirements. All amounts paid or provided to you under this Letter Agreement will be subject to any applicable income, payroll or other tax withholding requirements. 

Please acknowledge your agreement with the terms of this Letter Agreement by signing and dating the enclosed copy and returning it to the Company. 

All of us at the Company are pleased to have you join the Company and believe that you will find significant career opportunities and challenges that will be
professionally rewarding and mutually satisfying. 
 Sincerely, 
  

					
	 

	  		  	
	 Accepted and Agreed:
	  		  	
			
	 Damian Murphy
	  		  	
	 

	  	8/23/09	  	
	  
	  	
	 Signature
	  	 Date
	  	

 Summary of Class D Interest Terms 

*Below please find a brief summary of the terms of the Class D Interests. They operate much like stop options. Please not that the specific
provisions of the subscription agreement and LP agreement govern the terms of these interests and the below is to be used for overview/summary purposes only. 

Overview 
  

	 	•	 	Class D-1 Interests - These interests represent the 10% profits interests issued to Management. (1/2 of these interests are Time Vested and 1/2 are Performance Vested (at 1.75x MOIC)) Please see
below for an explanation of the two types and how they vest. 

  

	 	•	 	Class D-2 Interests – Are an additional 1% Performance Vested Interests for management that are all 3.0 MOIC Vesting Interests. 

 

	 	•	 	Upon termination all Unvested interests are forfeited. 

 Time Vesting Interests 

 

	 	•	 	0% vest the first year 

  

	 	•	 	20% vest on the first anniversary of the Closing Date 

  

	 	•	 	thereafter, an additional 1.667%% vest on the last day of each month (such that all the Time Vested Interests will be fully vested upon the 5th anniversary of the
Closing) 

  

	 	•	 	However, upon a Change of Control, all unvested Time Vested Interests will vest 

MOIC/Performance Vesting Interests 
  

	 	•	 	These interests are initially Unvested and vest upon the achievement of certain performance hurdles. 

  

	 	•	 	1.75 MOIC Vesting Interests vest when the Company has received aggregate cash proceeds or distributed marketable securities having a Fair Market Value equal to at least 175% of its aggregate Capital Contributions. If
this hurdle is met ALL 1.75 MOIC Vesting Interests immediately vest. 

  

	 	•	 	3.0 MOIC Vesting Interests vest when the Company has received aggregate cash proceeds or distributed marketable securities having a Fair Market Value equal to at least 300% of its aggregate Capital Contributions.
However, none of the 3.0 MOIC Vesting Interests shall vest following the 8th anniversary of the Closing Date.

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