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NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

August 17, 2004

Wachovia Bank, National Association
1001 Fannin, Suite 2255
Houston, Texas 77002
Attention:   Russell Clingman

      Reference is made to that certain Revolving Credit and Term Loan Agreement
dated as of July 16, 2004 (as amended, supplemented or otherwise modified from
time to time, the “Credit Agreement“; terms defined in the Credit Agreement and
not otherwise defined herein being used herein as therein defined), among Atlas
Pipeline Partners, L.P., a Delaware limited partnership (the “Borrower“), the
Guarantors named therein, the Lenders party thereto, and Wachovia Bank, National
Association, as Administrative Agent for the Lenders.

       The Borrower hereby gives you notice that:

        (a)        each of the Revolver Lenders (each, an “Increasing Revolver
Lender,“ and collectively, the “Increasing Revolver Lenders“) has agreed with
the Borrower to increase its Revolver Commitment under the Credit Agreement;

        (b)        upon the increase of the Revolver Commitments of the
Increasing Revolver Lenders, the Maximum Aggregate Revolver Amount shall be
$75,000,000;

        (c)        the proposed Increase Effective Date is August 17, 2004; and

        (d)        set forth on Exhibit A hereto is a revised Annex I to the
Credit Agreement, which sets forth the amount of the respective Commitments of
all Lenders (including the Increasing Revolver Lenders) immediately after the
increase in the Aggregate Maximum Revolver Amount on the Increase Effective
Date.

       The Borrower represents and warrants that (i) no Default or Event of
Default exists or will result from the increase in the Aggregate Maximum
Revolver Amount, (ii) it has executed and delivered the documentation
contemplated by Section 2.11(e) of the Credit Agreement, and (iii) all
conditions precedent to the increase of the Aggregate Maximum Revolver Amount
set forth in Sections 2.11 and 6.03 of the Credit Agreement have been satisfied.

REMAINDER OF PAGE INTENTIONALLY BLANK;
SIGNATURE PAGE TO FOLLOW.

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Very truly yours,

        ATLAS PIPELINE PARTNERS, L.P.,   a Delaware limited partnership    
By:  Atlas Pipeline Partners GP, LLC,           its general partner    
     By:   /s/ Frank P. Carolas                 Name:  Frank P. Carolas  
              Title:  Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        Each of the undersigned Guarantors ratifies and affirms its Guaranty and
consents to the increase in the Aggregate Maximum Revolver Amount to $75,000,000
on the Increase Effective Date.

        ATLAS PIPELINE NEW YORK, LLC,   a Pennsylvania limited liability company
    By:  Atlas Pipeline Operating Partnership, L.P.,           a Delaware
limited partnership           and its sole member              By:   Atlas
Pipeline Partners GP, LLC                     a Delaware limited liability
company                     and its sole general partner                       
By:  /s/ Frank P. Carolas                      Name:  Frank P. Carolas         
            Title:  Vice President

        ATLAS PIPELINE OHIO, LLC,   a Pennsylvania limited liability company    
By:  Atlas Pipeline Operating Partnership, L.P.,           a Delaware limited
partnership           and its sole member              By:   Atlas Pipeline
Partners GP, LLC                     a Delaware limited liability company  
                  and its sole general partner                       
By:  /s/ Frank P. Carolas                      Name:  Frank P. Carolas         
            Title:  Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        ATLAS PIPELINE PENNSYLVANIA, LLC,   a Pennsylvania limited liability
company     By:  Atlas Pipeline Operating Partnership, L.P.,           a
Delaware limited partnership           and its sole member              By:  
Atlas Pipeline Partners GP, LLC                     a Delaware limited liability
company                     and its sole general partner                       
By:  /s/ Frank P. Carolas                      Name:  Frank P. Carolas         
            Title:  Vice President

        ATLAS PIPELINE OPERATING PARTNERSHIP, L.P.,   a Delaware limited
partnership              By:   Atlas Pipeline Partners GP, LLC  
                  a Delaware limited liability company                     and
its sole general partner                        By:  /s/ Frank P. Carolas  
                   Name:  Frank P. Carolas                      Title:  Vice
President

        SPECTRUM FIELD SERVICES LLC,   a Delaware limited liability company    
By:  Atlas Pipeline Operating Partnership, L.P.,           a Delaware limited
partnership           and its sole member              By:   Atlas Pipeline
Partners GP, LLC                     a Delaware limited liability company  
                  and its sole general partner                       
By:  /s/ Frank P. Carolas                      Name:  Frank P. Carolas         
            Title:  Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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Acknowledged and Agreed:

        WACHOVIA BANK, NATIONAL ASSOCIATION,   as Administrative Agent and an
Increasing Lender     By:  /s/ Russell T. Clingman           Name:  Russell T.
Clingman           Title:  Director

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NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        KEYBANK NATIONAL ASSOCIATION,   as an Increasing Lender    
By:  /s/ Keven D. Smith           Name:  Keven D. Smith           Title:  Vice
President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        BANK OF OKLAHOMA N.A.,   as an Increasing Lender     By:  /s/ Lindsay
Sherrer           Name:  Lindsay Sherrer           Title:  AVP

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        WELLS FARGO BANK, N.A.,   as an Increasing Lender     By:  /s/ Lester
J.N. Keliher           Name:  Lester J.N. Keliher           Title:  Senior Vice
President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        FLEET NATIONAL BANK,   as an Increasing Lender     By:  /s/ Michael J.
Brochetti           Name:  Michael J. Brochetti           Title:  Director

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        FORTIS CAPITAL CORP.,   as an Increasing Lender     By:  /s/ Darrell W.
Holley           Name:  Darrell W. Holley           Title:  Managing Director  
  By:  /s/ David Montgomery           Name:  David Montgomery         
 Title:  Senior Vice President

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NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        GUARANTY BANK,   as an Increasing Lender     By:  /s/ Jim R. Hamilton  
        Name:  Jim R. Hamilton           Title:  Senior Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        BANK OF SCOTLAND,   as an Increasing Lender     By:  /s/ Karen Workman  
        Name:  Karen Workman           Title:  Assistant Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        COMERICA BANK,   as an Increasing Lender     By:  /s/ Huma Vadgama  
        Name:  Huma Vadgama           Title:  Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        WESTLB AG, NEW YORK BRANCH,   as an Increasing Lender    
By:  /s/ Walter T. Duffy III           Name:  Walter T. Duffy III         
 Title:  Director     By:  /s/ Jeffrey S. Davidson           Name:  Jeffrey S.
Davidson           Title:  Associate Director

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        COMPASS BANK,   as an Increasing Lender     By:  /s/ Dorothy Marchand  
        Name:  Dorothy Marchand           Title:  Senior Vice President

SIGNATURE PAGE TO
NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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        UFJ BANK LIMITED, NEW YORK BRANCH,   as an Increasing Lender    
By:  /s/ C. Lawrence Murphy           Name:  C. Lawrence Murphy         
 Title:  Senior Vice President

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NOTICE OF INCREASE OF AGGREGATE MAXIMUM REVOLVER AMOUNT

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EXHIBIT A

MASIMUM REVOLVER AMOUNTS AND MAXIMUM TERM LOAN AMOUNTS

Name of Lender

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Maximum Revolver Amount

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Maximum Term Loan Amount

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  Wachovia Bank, National Association $7,638,888 $6,111,112   KeyBank National
Association $7,638,888 $6,111,112   Bank of Oklahoma N.A. $6,944,444 $5,555,556
  Wells Fargo Bank, N.A. $6,944,444 $5,555,556   Fleet National Bank $6,944,444
$5,555,556   Fortis Capital Corp. $5,555,556 $4,444,444   Guaranty Bank
$5,555,556 $4,444,444   Bank of Scotland $5,555,556 $4,444,444   Comerica Bank
$5,555,556 $4,444,444   WestLB AG, New York Branch $5,555,556 $4,444,444  
Compass Bank $5,555,556 $4,444,444   UFJ Bank Limited, New York Branch
$5,555,556 $4,444,444   TOTAL $75,000,000 $60,000,000

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