Document:

Second Amendment

 Exhibit 10.61 
 SECOND AMENDMENT TO ADA CARBON SOLUTIONS, LLC 
 (f/k/a CROWFOOT DEVELOPMENT, LLC) 
 LIMITED LIABILITY COMPANY AGREEMENT 
 This SECOND AMENDMENT (“Amendment”), dated as of March 6, 2009, is made by and among the undersigned and amends the Limited Liability Company Agreement of ADA Carbon Solutions, LLC (f/k/a Crowfoot Development, LLC), a
Delaware limited liability company (the “Company”), entered into October 1, 2008 (as previously amended by that certain First Amendment to Crowfoot Development, LLC Limited Liability Company Agreement, entered into
November 5, 2008, the “LLC Agreement”), among the Company and the Members of the Company signatory hereto. This Amendment shall be effective as of March 1, 2009. Capitalized terms used and not otherwise defined in this
Amendment will have the meanings set forth in the LLC Agreement. 
 RECITALS 
 WHEREAS, the Members and the Company have heretofore entered into the LLC Agreement; and 
 WHEREAS, the Members and the Company desire to amend the LLC Agreement in accordance with Section 16.6 thereof as provided herein. 
 AGREEMENT 
 NOW,
THEREFORE, in consideration of the premises and the mutual agreements herein contained, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the Members hereby agree as follows: 
 1. Amendments. The LLC Agreement is hereby amended as follows: 
 (a) Each reference to “Crowfoot Development, LLC” in the LLC Agreement, including, without limitation, Section 1.2,
is deleted and replaced with “ADA Carbon Solutions, LLC.” 
 (b) Section 3.2 is deleted in its entirety
and replaced with the following: 
 3.2 Capital Contributions Generally. At such times as the Company requires Capital to meet the
Capital Requirements of the Company, as reasonably determined by any Manager of the Company, the Company shall send to the Members a written notice (a “Capital Request Notice”) advising the Members of such Capital
requirements and specifying the individual Capital Contribution amount of each Member not less than 20 Business Days prior to the date on which the Capital Contributions are to be made (the “Required Funding Date”). The ECP
Members shall have the right to amend, modify and/or withdraw any or all of the terms of such Capital Request Notice in their sole discretion at any time on or prior to the tenth Business Day following delivery of such Capital Request Notice in
accordance with Section 16.2 to the ECP Members. Any Capital Request Notice (including any Capital Request Notice amended or modified in accordance with the immediately preceding sentence) will be directed to Members in a manner consistent with
such Members’ 

 
obligations to make additional Capital Contributions at such time pursuant to the capital contribution tranches set forth in Section 3.3 or as provided
in Section 3.4, as applicable and will specify the general purpose for which the Capital Contributions are required to be made. Each Member will be required to make a Capital Contribution in cash in the amount stated in, on or before the date
set forth in, and otherwise pursuant to the terms and provisions of, the Capital Request Notice (as may be amended or modified by the ECP Members in accordance with this Section) and otherwise in accordance with this Article III. No Member shall
have any obligation to contribute Capital except as expressly provided in this Article III. 
 (c) The definition of
“Construction Debt Financing” in Section 15.1 is deleted in its entirety and replaced with the following: 
 “Construction Debt Financing” means such portion of the Construction Financing as the parties are able to obtain in the form of debt facilities (including loans, letters of credit and other extensions of credit, but
excluding intercompany loans, bridge loans and other temporary debt financing), with such portion in no event being less than 50% of the total Construction Financing. 
 (d) The definition of “ADA-ES Triggering Event” in Section 15.1 is amended by deleting clause (d) thereof in
its entirety and replacing it with the following: 
 “(d) failure to consummate the ECP Pipe Financing at any time on or before the
Outside Date (as defined in the Securities Purchase Agreement), except as a result of an ECP Triggering Event.” 
 (e)
Section 3.3(d)(iv) is hereby deleted in its entirety and replaced with the following: 
 “(iv) From and after the earliest of
(A) the date on which all Capital Contributions have been made pursuant to clause (iii), (B) the date on which a Triggering Event or other termination of the Securities Purchase Agreement has occurred and (C) any Material Default by
ADA-ES, then, subject to any election made pursuant to Section 3.6 or Section 12.2 and subject to any election by the ECP Members pursuant to the last sentence of this Section 3.3(d)(iv), no further Capital Contributions shall be made
to the Company pursuant to this Section 3.3(d) and the Members shall make Capital Contributions pursuant to, and solely to the extent permitted and required by, Sections 3.3(e), 3.3(f) and 3.4. Notwithstanding the foregoing or any other
provision in this Agreement to the contrary, from and after the date on which the ECP Members have funded the entire Third Tranche Amount (but excluding, for this purpose, the proceeds of any Other Financings that have not actually been consummated
as of the date of determination) until the earlier of the date of the ECP PIPE Financing and the Outside Date (as defined in the Securities Purchase Agreement), the ECP Members may elect, in their sole discretion, upon written notice to the Company,
to either (A) fund additional Capital Contributions or to (B) increase the Third Tranche Amount and fund additional Preferred Equity Contributions pursuant to Section 3.3(d)(i) (subject to the conditions set forth therein); in each
case at such times and in such amounts as the ECP Members determine are necessary to satisfy the Capital Requirements of the Company.” 
  

 2 

 2. Miscellaneous. 
 (a) Except as specifically amended by this Amendment, the terms and conditions of the LLC Agreement shall remain in full force and
effect. 
 (b) This Amendment may be executed in any number of counterparts, any of which may be delivered via
facsimile or PDF, each of which when so executed and delivered shall be deemed an original, and such counterparts together shall constitute one instrument. 
 (c) Each party hereto agrees to execute and deliver, or cause to be executed and delivered, such further instruments or documents or take such other actions as may be reasonably necessary to consummate the
transactions contemplated by this Amendment. 
 [Signature Pages Follow] 
  

 3 

 IN WITNESS WHEREOF, the undersigned Members have executed this Amendment, effective as of the date first
written above. 
  

			
	ADA-ES, INC.
		
	By:	 	/s/ Michael D. Durham
	Name:	 	Michael D. Durham
	Title:	 	CEO

 [SIGNATURE PAGE TO SECOND AMENDMENT TO LIMITED LIABILITY COMPANY AGREEMENT OF ADA CARBON
SOLUTIONS, LLC] 

			
	ENERGY CAPITAL PARTNERS I, LP
		
	By:	 	Energy Capital Partners GP I, LLC, its general partner
		
	By:	 	Energy Capital Partners, LLC, its managing member
		
	By:	 	/s/ Peter Labbat
	Name:	 	Peter Labbat
	Title:	 	Managing Member
	
	ENERGY CAPITAL PARTNERS I-A, LP
		
	By:	 	Energy Capital Partners GP I, LLC, its general partner
		
	By:	 	Energy Capital Partners, LLC, its managing member
		
	By:	 	/s/ Peter Labbat
	Name:	 	Peter Labbat
	Title:	 	Managing Member
	
	ENERGY CAPITAL PARTNERS I-B IP, LP
		
	By:	 	Energy Capital Partners GP I, LLC, its general partner
		
	By:	 	Energy Capital Partners, LLC, its managing member
		
	By:	 	/s/ Peter Labbat
	Name:	 	Peter Labbat
	Title:	 	Managing Member

 [SIGNATURE PAGE TO SECOND AMENDMENT TO LIMITED LIABILITY COMPANY AGREEMENT OF ADA CARBON
SOLUTIONS, LLC] 

			
	
	ENERGY CAPITAL PARTNERS I (CROWFOOT IP), LP
		
	By:	 	Energy Capital Partners GP I, LLC, its general partner
		
	By:	 	Energy Capital Partners, LLC, its managing member
		
	By:	 	/s/ Peter Labbat
	Name:	 	Peter Labbat
	Title:	 	Managing Member

 [SIGNATURE PAGE TO SECOND AMENDMENT TO LIMITED LIABILITY COMPANY AGREEMENT OF ADA CARBON
SOLUTIONS, LLC]First Amendment to the Carbon Supply Agreement

 Exhibit 10.62 
 AMENDMENT #1 TO CARBON SUPPLY AGREEMENT 
 This AMENDMENT #1 TO CARBON SUPPLY AGREEMENT (this
“Amendment”) is made and entered into as of the 31st day of March, 2009, by and between RED RIVER ENVIRONMENTAL PRODUCTS, LLC, a Delaware limited liability company (“Seller”), and LUMINANT GENERATION COMPANY
LLC, a Texas limited liability company (“Buyer”), pursuant to the Carbon Supply Agreement (the “Carbon Supply Agreement”), dated as of September 3, 2008, between Seller and Buyer. Capitalized
terms used but not defined in this Amendment have the meanings given to such terms in the Carbon Supply Agreement. 
 RECITALS

 WHEREAS, the Carbon Supply Agreement contemplates that Seller will achieve Financial Close by January 30, 2009; 
 WHEREAS, the conditions in the financial markets have changed since the execution of the Carbon Supply Agreement such that achievement of Financial Close
by January 30, 2009 was not possible and it is not feasible to estimate the timing for Financial Close; 
 WHEREAS, the equity owners of
Seller contemplate funding the costs of construction of Seller’s Facility until the earlier of completion of Seller’s Facility or achievement of Financial Close; and 
 WHEREAS, Seller has agreed to provide Buyer certain information regarding the status of construction of Seller’s Facility and financing. 

AGREEMENT 
 NOW, THEREFORE, in
consideration of the mutual covenants and obligations stated in this Amendment, the receipt and sufficiency of which the Parties acknowledge, Seller and Buyer hereby agree as follows: 
 SECTION 1. AMENDMENTS 
 1.1 Section 1 of the Carbon Supply Agreement is hereby amended by deleting the
definition of “Financial Close Milestone”. 
 1.2 Section 1 of the Carbon Supply Agreement is hereby amended by adding the following
definitions in the appropriate alphabetical order: 
 “Amendment #1” shall mean the Amendment #1 to Carbon Supply Agreement,
dated as of March 31, 2009, between Seller and Buyer. 
 “Seller Equity Owners” shall mean the holders of direct or
indirect equity interests in Seller. 
 1.3 Section 2.3 (Term) of the Carbon Supply Agreement is hereby amended by deleting the date
“December 31, 2014” in the first sentence of such Section and replacing it with the date “December 31, 2015”. 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 1.4 Section 10.2 of the Carbon Supply Agreement is hereby amended by deleting the period “thirty
(30) Days” in the first sentence of such Section and replacing it with the period “forty-five (45) Days”. 
 1.5
Section 15.1.2.1 of the Carbon Supply Agreement is hereby amended by replacing such Section in its entirety with the following: “Failure by the Seller Equity Owners to fund costs of construction of Seller’s Facility as such costs
become due and payable on a schedule similar to Exhibit A to Amendment #1 (as such schedule is adjusted due to changes to the overall construction schedule, actions of the construction contractor or any other event not resulting from a failure to
fund by the Seller Equity Owners), until the earlier of (x) completion of Seller’s Facility and (y) Financial Close.” 
 1.6
Section 15.1.2.3 of the Carbon Supply Agreement is amended by deleting the words “the Financial Close Milestone and”. 
 1.7
Section 15.1.2 of the Carbon Supply Agreement is hereby amended by adding the following Subsection 15.1.2.4 at the end of such Section: 
 “15.1.2.4 Seller abandons or suspends funding of construction activities at Seller’s Facility for at least 45 consecutive days.” 
 1.8 Section 15.2.2.1 of the Carbon Supply Agreement is hereby amended by deleting such Section in its entirety and replacing it with the following: “upon thirty (30) days advance Notice by Buyer
to Seller, if the Event of Default is an Event of Default under Section 15.1.2.1 (Failure to Fund Default);”. 
 1.9 Section 15.2.2 of
the Carbon Supply Agreement is hereby amended by deleting the period at the end of Subsection 15.2.2.6 and replacing it with “; and” and by adding the following Subsection 15.2.2.7 to the end of such Section: 
 “15.2.2.7 upon five (5) Days advance Notice by Buyer to Seller, if the Event of Default is an Event of Default under
Section 15.1.2.4 (Suspension Default).” 
 1.10 The Carbon Supply Agreement is hereby amended by adding the following Section 27 at the
end thereof: 
 “SECTION 27. PROVISION OF INFORMATION 
 Until Financial Close, Seller shall provide the following information to Buyer at least once each month: 
 27.1 An update on all major areas of Seller’s Facility, including, without limitation, financing, site construction, interim carbon supply and
coal procurement, substantially in the form of Exhibit B to Amendment #1 or as otherwise reasonably acceptable to Buyer. 
 27.2 A copy
of the presentation from the most recent monthly review meeting with Seller’s construction contractor, substantially in the form of Exhibit C to Amendment #1 or as otherwise reasonably acceptable to Buyer. 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 27.3 Copies of all lien releases received from Seller’s construction contractor since the
last monthly delivery. 
 27.4 Documentation on current funding and capital calls for Seller’s Facility pursuant to documentation
of the Seller Equity Owners, substantially in the form of Exhibit D to Amendment #1 or as otherwise reasonably acceptable to Buyer.” 
 1.11
Exhibit 4 to the Carbon Supply Agreement is hereby amended by deleting the line item “Financial Close” in its entirety. 
 1.12 The
Annual Nomination for the Contract Year 2009 is hereby amended to be * pounds. Monthly projections are provided in Exhibit E to Amendment #1. 
 SECTION
2. MISCELLANEOUS 
 2.1 Effectiveness. This Amendment shall be effective when it shall have been executed by both Seller and Buyer. Except as
specifically modified pursuant to the terms of this Amendment, the terms and conditions of the Carbon Supply Agreement remain in full force and effect. 
 2.2 Choice of Law. THIS AMENDMENT IS GOVERNED BY AND SHALL BE CONSTRUED IN ACCORDANCE WITH LAWS OF THE STATE OF TEXAS WITHOUT GIVING EFFECT TO ANY CHOICE OR CONFLICT OF LAW PROVISION OR RULE (WHETHER OF THE STATE OF TEXAS OR ANY
OTHER JURISDICTION) THAT WOULD CAUSE THE APPLICATION OF THE LAWS OF ANY JURISDICTION OTHER THAN THE STATE OF TEXAS. THE PARTIES MUTUALLY CONSENT TO THE EXCLUSIVE JURISDICTION OF THE FEDERAL AND STATE COURTS IN DALLAS COUNTY, TEXAS AND AGREE THAT ANY
ACTION, SUIT OR PROCEEDING CONCERNING, RELATED TO OR ARISING OUT OF THIS AMENDMENT AND THE NEGOTIATION OF THIS AMENDMENT WILL BE BROUGHT ONLY IN A FEDERAL OR STATE COURT IN DALLAS COUNTY, TEXAS AND THE PARTIES AGREE THAT THEY WILL NOT RAISE ANY
DEFENSE OR OBJECTION OR FILE ANY MOTION BASED ON LACK OF PERSONAL JURISDICTION, IMPROPER VENUE, INCONVENIENCE OF THE FORUM OR THE LIKE IN ANY CASE FILED IN A FEDERAL OR STATE COURT IN DALLAS COUNTY, TEXAS. THE PARTIES MUTUALLY AGREE THAT THIS
AMENDMENT IS A “MAJOR TRANSACTION” WITHIN THE MEANING OF THE TEXAS CIVIL PRACTICE AND REMEDIES CODE § 15.020 AND AS SUCH AGREE THAT ANY ACTION OR SUIT ARISING FROM THIS AMENDMENT SHALL BE BROUGHT IN DALLAS COUNTY, TEXAS, AND VENUE
SHALL BE IN DALLAS COUNTY, DALLAS, TEXAS. 
 2.3 Counterparts. Seller and Buyer may execute this Amendment in two or more counterparts, each of which
shall constitute an original document and all of which taken together shall constitute a single agreement. 
 [Remainder of page
intentionally left blank.] 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 IN WITNESS WHEREOF, the Parties have duly
executed this Amendment in their respective corporate names as of the 31st day of March, 2009. 
  

					
	SELLER
	
	Red River Environmental Products, LLC
		
	By:	 	/s/ Jean Bustard
		 	Name:	 	Jean Bustard
		 	Title:	 	Manager
	
	BUYER
	
	Luminant Generation Company LLC
		
	By:	 	/s/ NC Spence
		 	Name:	 	NC Spence
		 	Title:	 	Vice President

  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 EXHIBIT A 
 EPC CONTRACT SCHEDULE OF CASH FLOWS and 
 MILESTONE PAYMENT SCHEDULE 

Milestone Payment Schedule 
 *

  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 EXHIBIT B 
 FORM OF MONTHLY UPDATE 
 * 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 FORM OF EPC REVIEW MEETING PRESENTATION 
 

 
 

 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 EXHIBIT D 
 FORM OF DOCUMENTATION ON FUNDING AND CAPITAL CALLS 
 Crowfoot Development 
 Weekly Cash Summary 
  

															
	 Date
	  	Event	  	CF Dev
MM	  	CF Dev
Checking	  	Red River
Checking	  	Supply
Checking	  	5 Forks
Checking	  	ADA
Savings

 * 
  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

 EXHIBIT E 
 2009 MONTHLY PROJECTIONS 
  

																							
	 Jan
	  	Feb	  	Mar	  	Apr	  	May	  	Jun	  	Jul	  	Aug	  	Sep	  	Oct	  	Nov	  	Dec

 * 
 Notes: 
  

	1.	All projections in pounds. 

  

	2.	Projections are provided for planning purposes only and are subject to change. 

  

	3.	2009 Annual Nomination is * pounds. 

  

	*	indicates portions of the exhibit that have been omitted pursuant to a request for confidential information. The non-public information has been filed with the Commission.

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