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 September 30, 2008

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 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  x |  | 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 October 31, 2008
|Common Stock, no par value |  | 6,749,136                      









---

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

This Amendment No. 1 to the Form 10-Q for the
quarterly period ended September 30, 2008 (originally filed on November 7, 2008), is filed for the sole purpose of filing a new copy of Exhibit 10.54. Amended Exhibit 10.54 addresses changes made pursuant to the Companys request for
confidential treatment of certain information in Exhibit 10.54. With the exception of Exhibit 10.54, the Exhibits are unchanged and copies of the Exhibits not incorporated by reference are attached to the Form 10-Q filed on November 7, 2008.



|      |  |                                                                                                                                                                                                                             
|----- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|3.1   |  | Amended and Restated Articles of Incorporation of ADA-ES (1)                                                                                                                                                                
|      | 
|3.2   |  | Amended and Restated Bylaws of ADA-ES (2)                                                                                                                                                                                   
|      | 
|4.1   |  | Form of Specimen Common Stock Certificate (3)                                                                                                                                                                               
|      | 
|4.2   |  | Registration Rights Agreement dated October 21, 2005 (4)                                                                                                                                                                    
|      | 
|4.3   |  | Registration Rights Agreement between ADA-ES, Inc. and Arch Coal, Inc. dated March 19, 2003 (5)                                                                                                                             
|      | 
|4.4   |  | Standstill and Registration Rights Agreements dated August 3-6, 2004(6)                                                                                                                                                     
|      | 
|4.5   |  | Registration Rights Agreement among ADA-ES, Inc., Perella Weinberg Partners Oasis Master Fund L.P., Black River Commodity Select Fund Ltd. and Black River Small Capitalization Fund Ltd. dated
August 26, 2008 (5)         
|      | 
|10.38 |  | Project Crowfoot Incentive Program, as amended and restated on August 13, 2008 and October 15, 2008**, ***                                                                                                                  
|      | 
|10.47 |  | Carbon Supply Agreement between Winfield Industries, Inc and ADA-ES, Inc. dated August 6, 2008 (assigned to Crowfoot Supply Company, LLC on October 1, 2008)**                                                              
|      | 
|10.48 |  | Promissory Note and Account Pledge Agreement for Colorado Business Bank Letter of Credit dated August 15, 2008**                                                                                                            
|      | 
|10.49 |  | Carbon Supply Agreement between Red River Environmental Products, LLC and Luminant Generation Company, LLC dated September 3, 2008**                                                                                        
|      | 
|10.50 |  | Multiple Hearth Furnace (MHF) Contract between Industrial Furnace Company, Inc and Red River Environmental Products, LLC dated September 5, 2008**                                                                          
|      | 
|      |  | (a)    Unit 1- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (b)    Unit 2- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (c)    Unit 3- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (d)    Unit 4- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|10.51 |  | Amended and Restated Engineering, Procurement and Construction Agreement between Red River Environmental Products, LLC and BE&K Construction Company, LLC dated September 8,
2008**                                         
|      | 
|10.52 |  | Guaranty of ADA-ES, Inc. to BE&K Construction Company, LLC dated September 8, 2008 regarding Amended and Restated Engineering, Procurement and Construction Agreement**                                                     
|      | 
|10.53 |  | Securities Purchase Agreement between ADA-ES, Inc. and Energy Capital Partners I, LP, Energy Capital Partners I-A LP, Energy Capital Partners I-B, LP and Energy Capital Partners I (TEF IP), LP
dated October 1, 2008**    
|      | 
|10.54 |  | Joint Development Agreement between ADA-ES, Inc. and Energy Capital Partners I, LP, Energy Capital Partners I-A LP, Energy Capital Partners I-B IP, LP and Energy Capital Partners I (Crowfoot
IP), LP dated October 1, 2008
|      | 
|10.55 |  | Limited Liability Company Agreement of Crowfoot Development, LLC dated October 1, 2008**                                                                                                                                    
|      | 
|10.56 |  | Intellectual Property License Agreement between ADA-ES, Inc. and Crowfoot Development, LLC dated October 1, 2008**                                                                                                          
|      | 
|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                                                            
|      | 
|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                                                            



|* | 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.
|-- | --------------------------------------------------------------------------------------------



|*** | Management contract or compensatory plan or arrangement.
|--- | --------------------------------------------------------



|(1) | Incorporated by reference to Exhibit 3.1 to the Form 10-QSB for the quarter ended September 30, 2005 filed on November 10, 2005 (File No. 000-50216).
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------



1



---

|(2) | Incorporated by reference to Exhibit 3.2 to the Form 8-K dated December 1, 2005 filed on December 5, 2005 (File No. 000-50216).
|--- | -------------------------------------------------------------------------------------------------------------------------------



|(3) | Incorporated by reference to Exhibit 4.1 to the Form 8-K dated October 21, 2005 filed on October 26, 2005 (File No. 000-50216).
|--- | -------------------------------------------------------------------------------------------------------------------------------



|(4) | Incorporated by reference to Exhibit 10.1 to the Form 8-K dated October 21, 2005 filed on October 26, 2005 (File No. 000-50216).
|--- | --------------------------------------------------------------------------------------------------------------------------------



|(5) | Incorporated by reference to Exhibit A to Exhibit 10.1 to the Form S-3 filed on October 18, 2004 (File No. 333-119795).
|--- | -----------------------------------------------------------------------------------------------------------------------



|(6) | Incorporated by reference to Exhibit 10.29 to the Form 10-K for the year ended December 31, 2006 filed on March 27, 2007 (File No. 000-50216).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------

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: December 24, 2008 |  | /s/ Michael D. Durham                
|                        |  | Michael D. Durham                    
|                        |  | President and Chief Executive Officer
|                        | 
|Date: December 24, 2008 |  | /s/ Mark H. McKinnies                
|                        |  | Mark H. McKinnies                    
|                        |  | Chief Financial Officer              



2



---

EXHIBIT INDEX



|      |  |                                                                                                                                                                                                                             
|----- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|3.1   |  | Amended and Restated Articles of Incorporation of ADA-ES (1)                                                                                                                                                                
|      | 
|3.2   |  | Amended and Restated Bylaws of ADA-ES (2)                                                                                                                                                                                   
|      | 
|4.1   |  | Form of Specimen Common Stock Certificate (3)                                                                                                                                                                               
|      | 
|4.2   |  | Registration Rights Agreement dated October 21, 2005 (4)                                                                                                                                                                    
|      | 
|4.3   |  | Registration Rights Agreement between ADA-ES, Inc. and Arch Coal, Inc. dated March 19, 2003 (5)                                                                                                                             
|      | 
|4.4   |  | Standstill and Registration Rights Agreements dated August 3-6, 2004(6)                                                                                                                                                     
|      | 
|4.5   |  | Registration Rights Agreement among ADA-ES, Inc., Perella Weinberg Partners Oasis Master Fund L.P., Black River Commodity Select Fund Ltd. and Black River Small Capitalization Fund Ltd. dated
August 26, 2008 (5)         
|      | 
|10.38 |  | Project Crowfoot Incentive Program, as amended and restated on August 13, 2008 and October 15, 2008**, ***                                                                                                                  
|      | 
|10.47 |  | Carbon Supply Agreement between Winfield Industries, Inc and ADA-ES, Inc. dated August 6, 2008 (assigned to Crowfoot Supply Company, LLC on October 1, 2008)**                                                              
|      | 
|10.48 |  | Promissory Note and Account Pledge Agreement for Colorado Business Bank Letter of Credit dated August 15, 2008**                                                                                                            
|      | 
|10.49 |  | Carbon Supply Agreement between Red River Environmental Products, LLC and Luminant Generation Company, LLC dated September 3, 2008**                                                                                        
|      | 
|10.50 |  | Multiple Hearth Furnace (MHF) Contract between Industrial Furnace Company, Inc and Red River Environmental Products, LLC dated September 5, 2008**                                                                          
|      | 
|      |  | (a)    Unit 1- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (b)    Unit 2- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (c)    Unit 3- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|      |  | (d)    Unit 4- Project No. 65214-RFP No. EFH-101                                                                                                                                                                            
|      | 
|10.51 |  | Amended and Restated Engineering, Procurement and Construction Agreement between Red River Environmental Products, LLC and BE&K Construction Company, LLC dated September 8,
2008**                                         
|      | 
|10.52 |  | Guaranty of ADA-ES, Inc. to BE&K Construction Company, LLC dated September 8, 2008 regarding Amended and Restated Engineering, Procurement and Construction Agreement**                                                     
|      | 
|10.53 |  | Securities Purchase Agreement between ADA-ES, Inc. and Energy Capital Partners I, LP, Energy Capital Partners I-A LP, Energy Capital Partners I-B, LP and Energy Capital Partners I (TEF IP), LP
dated October 1, 2008**    
|      | 
|10.54 |  | Joint Development Agreement between ADA-ES, Inc. and Energy Capital Partners I, LP, Energy Capital Partners I-A LP, Energy Capital Partners I-B IP, LP and Energy Capital Partners I (Crowfoot
IP), LP dated October 1, 2008
|      | 
|10.55 |  | Limited Liability Company Agreement of Crowfoot Development, LLC dated October 1, 2008**                                                                                                                                    
|      | 
|10.56 |  | Intellectual Property License Agreement between ADA-ES, Inc. and Crowfoot Development, LLC dated October 1, 2008**                                                                                                          
|      | 
|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                                                            
|      | 
|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                                                            



|* | 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.
|-- | --------------------------------------------------------------------------------------------



|*** | Management contract or compensatory plan or arrangement.
|--- | --------------------------------------------------------



|(1) | Incorporated by reference to Exhibit 3.1 to the Form 10-QSB for the quarter ended September 30, 2005 filed on November 10, 2005 (File No. 000-50216).
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | Incorporated by reference to Exhibit 3.2 to the Form 8-K dated December 1, 2005 filed on December 5, 2005 (File No. 000-50216).
|--- | -------------------------------------------------------------------------------------------------------------------------------



|(3) | Incorporated by reference to Exhibit 4.1 to the Form 8-K dated October 21, 2005 filed on October 26, 2005 (File No. 000-50216).
|--- | -------------------------------------------------------------------------------------------------------------------------------



|(4) | Incorporated by reference to Exhibit 10.1 to the Form 8-K dated October 21, 2005 filed on October 26, 2005 (File No. 000-50216).
|--- | --------------------------------------------------------------------------------------------------------------------------------



|(5) | Incorporated by reference to Exhibit A to Exhibit 10.1 to the Form S-3 filed on October 18, 2004 (File No. 333-119795).
|--- | -----------------------------------------------------------------------------------------------------------------------



|(6) | Incorporated by reference to Exhibit 10.29 to the Form 10-K for the year ended December 31, 2006 filed on March 27, 2007 (File No. 000-50216).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------



3