United States

Securities and Exchange Commission

Washington, D.C. 20549





FORM 10-Q/A

Amendment No. 1





(Mark One)

|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended June 30, 2011

or



| ̈ | TRANSITION REPORT PURSUANT TO 13 OR 15(d) OF THE EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------

For the transition period from             to

Commission File Number: 000-50216





ADA-ES, INC.

(Exact name of registrant as specified in its charter)







|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Colorado                                                       |  | 84-1457385                          
|(State or other jurisdiction of
incorporation or organization) |  | (I.R.S. Employer Identification No.)
|                                                               | 
|8100 SouthPark Way, B, Littleton, Colorado                     |  | 80120                               
|(Address of principal executive offices)                       |  | (Zip Code)                          

(303) 734-1727

(Registrants telephone number, including area code)

Not
Applicable

(Former name, former address and former fiscal year, if changed since last report)





Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for
such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90
days.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule
405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes  x    No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definition of large accelerated
filer, accelerated filer, and smaller reporting company in Rule 12b-2 of the Exchange Act.



|                        |  |   |  |  |  |                           |  |  
|----------------------- |  | - |  |  |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈ |  |  |  | Accelerated filer         |  |  ̈
|                        |  |   |  | 
|Non-accelerated filer   |  |  ̈ |  |  |  | Smaller reporting company |  | x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act. (Check
one):    Yes   ̈    No  x

APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY

PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

Indicate by check mark whether the
registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a
court.    Yes   ̈    No   ̈

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuers classes of common stock, as of the latest practicable date.



|                           |  |                             
|-------------------------- |  | ----------------------------
|Class                      |  | Outstanding at July 31, 2011
|Common Stock, no par value |  | 7,659,382                   









---

EXPLANATORY NOTE

This Amendment No. 1 (Amendment No. 1) to the Form 10-Q of ADA-ES, Inc. (the Company) for the quarterly period ended June 30, 2011 (originally filed on
August 12, 2011) (the Quarterly Report), is filed for the purpose of filing new copies of Exhibit 10.33, Exhibit 10.84 and Exhibit 10.85 (the Amended Exhibits) and for adding a notation in the exhibit index that the
non-public information has been separately filed with the Securities and Exchange Commission (SEC). The Company sought confidential treatment for portions of the Amended Exhibits and, following correspondence with the SEC, has restored
certain portions of the Amended Exhibits that were previously redacted.

Except for the foregoing, this Amendment No. 1 does not amend
the Quarterly Report in any way and does not modify or update any disclosures contained in the Quarterly Report, which continues to speak as of the original date of the Quarterly Report. Accordingly, this Amendment No. 1 should be read in
conjunction with the Quarterly Report and the Companys other filings made with the SEC subsequent to the Quarterly Report.

In
accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Amendment No. 1 includes updated certifications from the Registrants Chief Executive Officer and Chief Financial Officer.

With the exception of the Amended Exhibits and the notation stating that the non-public information has been separately filed with the SEC, the Exhibits
are unchanged and copies of the Exhibits are incorporated by reference as indicated.



|Item 6. | Exhibits
|------- | --------



|        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        | 
|10.33** |  | Second Amended and Restated Operating Agreement of Clean Coal Solutions, LLC dated May 27, 2011, by and among Clean Coal Solutions, LLC, ADA-ES, Inc., GSFS Investments I Corp.
and NexGen Refined Coal, LLC.                                                                                                                                                                                                                                                                                                                       
|        | 
|10.84** |  | Exclusive Right to Lease Agreement dated May 27, 2011 between Clean Coal Solutions, LLC and GSFS Investments I Corp.                                                                                                                                                                                                                                                                                                                                                                                                                
|        | 
|10.85   |  | Class B Unit Purchase Agreement dated May 27, 2011 between Clean Coal Solutions, LLC and GSFS Investments I Corp.                                                                                                                                                                                                                                                                                                                                                                                                                   
|        | 
|10.86   |  | ADA-ES, Inc. Guaranty for the benefit of GSFS Investments I Corp. dated May 27, 2011.(1)                                                                                                                                                                                                                                                                                                                                                                                                                                            
|        | 
|10.87   |  | Contribution Agreement dated May 27, 2011 between ADA-ES, Inc. and NexGen Refined Coal, LLC.(1)                                                                                                                                                                                                                                                                                                                                                                                                                                     
|        | 
|31.1*   |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a).                                                                                                                                                                                                                                                                                                                                                                                                                  
|        | 
|31.2*   |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a).                                                                                                                                                                                                                                                                                                                                                                                                                  
|        | 
|32.1*   |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(1)                                                                                                                                                                                                                                                                                                                                                                
|        | 
|32.2*   |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(1)                                                                                                                                                                                                                                                                                                                                                                
|        | 
|101*    |  | The following financial statements, formatted in XBRL: (i) Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010, (ii) Consolidated Statements of Operations for
the six months ended June 30, 2011 and 2010, (iii) Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010; and (iv) Notes to the Unaudited Consolidated Financial Statements, tagged as blocks of text. The information in
Exhibit 101 is furnished and not filed, as provided in Rule 402 of Regulation S-T.(1)



|* | These certifications are furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------

|** | Portions of this exhibit have been omitted pursuant to a request for confidential treatment. The non-public information has been separately filed with the Securities
and Exchange Commission.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(1) | Incorporated by reference to the same number exhibit to the Form 10-Q for the quarter ended June 30, 2011 filed on August 12, 2011 (File No. 000-5016).
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------



---

SIGNATURES

In accordance with the requirements of the Securities Exchange Act of 1934, the Registrant caused this report to be signed on its behalf by the undersigned thereunto duly authorized.



|                         |  |  |  |                                      
|------------------------ |  |  |  | -------------------------------------
|                         |  |  |  | ADA-ES, Inc.                         
|                         |  |  |  | Registrant                           
|                         |  | 
|Date: September 28, 2011 |  |  |  | /s/ Michael D. Durham                
|                         |  |  |  | Michael D. Durham                    
|                         |  |  |  | President and Chief Executive Officer
|                         |  | 
|Date: September 28, 2011 |  |  |  | /s/ Mark H. McKinnies                
|                         |  |  |  | Mark H. McKinnies                    
|                         |  |  |  | Chief Financial Officer              



---

EXHIBIT INDEX



|        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        | 
|10.33** |  | Second Amended and Restated Operating Agreement of Clean Coal Solutions, LLC dated May 27, 2011, by and among Clean Coal Solutions, LLC, ADA-ES, Inc., GSFS Investments I Corp.
and NexGen Refined Coal, LLC.                                                                                                                                                                                                                                                                                                                       
|        | 
|10.84** |  | Exclusive Right to Lease Agreement dated May 27, 2011 between Clean Coal Solutions, LLC and GSFS Investments I Corp.                                                                                                                                                                                                                                                                                                                                                                                                                
|        | 
|10.85   |  | Class B Unit Purchase Agreement dated May 27, 2011 between Clean Coal Solutions, LLC and GSFS Investments I Corp.                                                                                                                                                                                                                                                                                                                                                                                                                   
|        | 
|10.86   |  | ADA-ES, Inc. Guaranty for the benefit of GSFS Investments I Corp. dated May 27, 2011.(1)                                                                                                                                                                                                                                                                                                                                                                                                                                            
|        | 
|10.87   |  | Contribution Agreement dated May 27, 2011 between ADA-ES, Inc. and NexGen Refined Coal, LLC.(1)                                                                                                                                                                                                                                                                                                                                                                                                                                     
|        | 
|31.1*   |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a).                                                                                                                                                                                                                                                                                                                                                                                                                  
|        | 
|31.2*   |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a).                                                                                                                                                                                                                                                                                                                                                                                                                  
|        | 
|32.1*   |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(1)                                                                                                                                                                                                                                                                                                                                                                
|        | 
|32.2*   |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(1)                                                                                                                                                                                                                                                                                                                                                                
|        | 
|101*    |  | The following financial statements, formatted in XBRL: (i) Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010, (ii) Consolidated Statements of Operations for
the six months ended June 30, 2011 and 2010, (iii) Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and 2010; and (iv) Notes to the Unaudited Consolidated Financial Statements, tagged as blocks of text. The information in
Exhibit 101 is furnished and not filed, as provided in Rule 402 of Regulation S-T.(1)



|* | These certifications are furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------

|** | Portions of this exhibit have been omitted pursuant to a request for confidential treatment. The non-public information has been separately filed with the Securities
and Exchange Commission.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(1) | Incorporated by reference to the same number exhibit to the Form 10-Q for the quarter ended June 30, 2011 filed on August 12, 2011 (File No. 000-5016).
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------