Document:

Exhibit
      10(e)(1)

    

    FIRST
      AMENDMENT DATED FEBRUARY 1, 2001 TO BASE GAS PURCHASE AGREEMENT DATED MARCH
      31,
      1999 BETWEEN NORTHEAST OHIO GAS MARKETING, INC., AND ATLAS ENERGY GROUP, INC.,
      ATLAS RESOURCES, INC., AND RESOURCE ENERGY, INC.Exhibit
      10(e)(2)

     

    SECOND
      AMENDMENT DATED JULY 16, 2003 TO BASE GAS PURCHASE AGREEMENT DATED MARCH 31,
      1999 BETWEEN NORTHEAST OHIO GAS MARKETING, INC., AND ATLAS ENERGY GROUP, INC.,
      ATLAS RESOURCES, INC., AND RESOURCE ENERGY, INC.Exhibit
      10(e)(3)

     

    THIRD
      AMENDMENT DATED JANUARY 5, 2007 TO BASE GAS PURCHASE AGREEMENT DATED MARCH
      31,
      1999 BETWEEN NORTHEAST OHIO GAS MARKETING, INC., AND ATLAS ENERGY GROUP, INC.,
      ATLAS RESOURCES, INC., AND RESOURCE ENERGY, INC.Exhibit
      10(f)

    

    GUARANTY
      DATED AUGUST 12, 2003 

    BETWEEN
      FIRST ENERGY CORP. AND ATLAS RESOURCES, INC. 

    TO
      GAS PURCHASE AGREEMENT DATED MARCH 31, 1999 

    BETWEEN
      NORTHEAST OHIO GAS MARKETING, INC., AND ATLAS ENERGY GROUP, INC., ATLAS
      RESOURCES, INC., AND RESOURCE ENERGY, INC.Exhibit
      10(g)

    

    MASTER
      NATURAL GAS GATHERING AGREEMENT DATED FEBRUARY 2, 2000 AMONG ATLAS PIPELINE
      PARTNERS, L.P. AND ATLAS PIPELINE OPERATING PARTNERSHIP, L.P., ATLAS AMERICA,
      INC., RESOURCE ENERGY, INC., AND VIKING RESOURCES
      CORPORATIONExhibit
      10(h)

    

    OMNIBUS
      AGREEMENT DATED FEBRUARY 2, 2000 AMONG ATLAS AMERICA, INC., RESOURCE ENERGY,
      INC., AND VIKING RESOURCES CORPORATION, AND ATLAS PIPELINE OPERATING
      PARTNERSHIP, L.P., AND ATLAS PIPELINE PARTNERS, L.P.Exhibit
      10(i)

    

    NATURAL
      GAS GATHERING AGREEMENT DATED JANUARY 1, 2002 AMONG ATLAS PIPELINE PARTNERS,
      L.P., AND ATLAS PIPELINE OPERATING PARTNERSHIP, L.P. AND ATLAS RESOURCES, INC.,
      AND ATLAS ENERGY GROUP, INC. AND ATLAS NOBLE CORPORATION, AND RESOURCE ENERGY
      INC., AND VIKING RESOURCES CORPORATIONExhibit
      10(j)

    

    BASE
      CONTRACT FOR SALE AND PURCHASE OF NATURAL GAS DATED NOVEMBER 13, 2002 BETWEEN
      UGI ENERGY SERVICES, INC. AND VIKING RESOURCES CORP.Exhibit
      10(j)(1)

     

    FIRST
      AMENDMENT TO BASE CONTRACT FOR SALE AND PURCHASE OF NATURAL
      GAS

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    FIRST
      AMENDMENT TO

    BASE
      CONTRACT FOR THE SALE AND PURCHASE OF NATURAL GAS

    

    This
      First Amendment To Base Contract For The Sale And Purchase Of Natural Gas (this
      "Amendment")
      is
      made and entered into on November ___, 2005 (the “Effective
      Date”)
      by and
      between Atlas America, Inc., a Pennsylvania corporation (“Atlas
      PA”),
      Atlas
      America, Inc. a Delaware corporation ("Atlas
      DE"),
      and
      UGI Energy Services, Inc. d/b/a/ GASMARK, a Pennsylvania corporation
      ("GASMARK").
      This
      Amendment modifies, supplements, forms part of, and amends that certain Base
      Contract for the Sale and Purchase of Natural Gas entered into as of November
      13, 2002 between GASMARK and Viking Resources Corporation and assigned by Viking
      Resources Corporation to Atlas PA by Assignment and Assumption Agreement dated
      October 1, 2004 (the "Base
      Contract").
      Capitalized terms used in this Amendment that are not herein defined will have
      the meanings ascribed to them in the Base Contract. In the event of a conflict
      between the terms of this Amendment and the Base Contract, the terms of this
      Amendment shall apply. Atlas PA, Atlas DE and GASMARK are at times referred
      to
      herein individually as a "Party" and collectively as the "Parties."

    

    WHEREAS,
      GASMARK has requested that Atlas PA assign its rights, duties and interests
      as
      seller under the Base Contract, and Atlas DE has agreed to the assignment and
      assumption; and

    

    WHEREAS,
      GASMARK and Atlas DE wish to amend the Base Contract prospectively in order
      to
      define and limit the obligations that each Party shall have to provide
      collateral to the other in conjunction with future gas purchase and sale
      transactions under the Base Contract 

    

    NOW,
      THEREFORE, for and in consideration of the premises and mutual covenants herein
      contained and other good and valuable consideration, the receipt and sufficiency
      of which are hereby acknowledged, and intending to be bound hereby the Parties
      hereby agree as follows:

    

    I.

    ASSIGNMENT
      AND ASSUMPTION

    

    1.1 Assignment.
      Effective as of the Effective Date, Atlas PA does hereby sell, grant, convey,
      assign, transfer and set over to Atlas DE all of its right, title and interest
      in and to the Base Contract and all transactions confirmed
      thereunder.

     

    1.2 Consent
      to Assignment.
      GASMARK
      hereby consents to the assignment of the Base Contract, and all transactions
      confirmed thereunder, from Atlas PA to Atlas DE effective as of the Effective
      Date.

     

    1.3 Assumption.
      Atlas
      DE hereby assumes and agrees to pay, discharge or perform, as appropriate,
      the
      Base Contract and all transactions confirmed thereunder, and such Base Contract
      is hereby declared to be the debts, liabilities and obligations of Atlas DE
      from
      and after the Effective Date. 

     

    
      
         

      

      
        
        

        
          

        

      

      
         

      

    

     

    1.4 Release
      and Discharge.
      Upon
      execution of this Amendment by Atlas DE, Atlas PA will be released from
      any
      liability or obligation under this Base Contract and any transaction confirmed
      thereunder, that arises or accrues after the Effective Date of assignment.
      

    

    II.

    CREDIT
      SUPPORT TERMS

    

    2.1 Integration;
      Amendment to Definition of Event of Default.
      This
      Article II defines the terms of the Credit Support Obligation among the Parties,
      and supercedes and replaces in their entirety Sections 10.1 and 10.2(vii) of
      the
      Base Contract. Section 10.2 is hereby amended to add the following as an Event
      of Default thereunder: "material failure to receive or deliver the Contract
      Quantity under a Transaction Confirmation."

    

    2.2 Collateral
      Threshold.
      On any
      day during the term of the Base Contract that an Event of Default has not
      occurred, the amount of Exposure that either Atlas DE or GASMARK will accept
      in
      Transactions with the other without requiring the posting of additional
      collateral shall be Ten Million Dollars ($10,000,000)(the “Collateral
      Threshold”).
      For
      purposes of this Amendment, “Exposure"
      shall
      mean the Market Value of all Terminated Transactions, Excluded Transactions
      and
      other applicable charges that either Party would owe to the other on the date
      of
      calculation if an Early Termination Date had been designated, as provided for
      in
      Section 10.3.1 of the Base Contract. The Parties acknowledge that the Exposure
      that each has to the other under the Transactions in place as of the Effective
      Date exceeds the Collateral Threshold. 

    

    2.3 Collateral
      for Obligations of GASMARK.
      GASMARK
      currently has collateral posted in support of its obligations under the Base
      Contract in the form of a parent guaranty effective as of January 1, 2005 from
      UGI Corporation in favor of Viking Resources Corp. in the amount of Seven
      Million Dollars ($7,000,000) (the "Guaranty").
      Within ten (10) Business Days after the Effective Date, GASMARK will cause
      to be
      executed and delivered to Atlas DE a new parent guaranty from UGI Corporation
      in
      favor of Atlas DE in the amount of Eight Million Dollars ($8,000,000)(the
“Revised
      Guaranty”)
      containing terms and conditions reasonably acceptable to Atlas DE and
      substantially identical terms to the Guaranty. The Revised Guaranty will
      supercede and replace in its entirety the Guaranty and will be effective as
      of
      the Effective Date. It shall be a condition precedent to GASMARK's performance
      under this section that Atlas DE perform its obligations under Section
      2.3.

    

    2.4 Collateral
      for Obligations of Atlas DE.
      Within
      ten (10) Business Days after the Effective Date, Atlas DE will cause to be
      executed and delivered to GASMARK an irrevocable standby letter of credit issued
      by Wachovia Bank, N.A. or other lender(s) reasonably acceptable to GASMARK,
      containing terms and conditions that are reasonably acceptable to GASMARK,
      in
      the amount of Ten Million Dollars ($10,000,000)(the “Atlas
      LC”),
      which
      shall be exercisable by GASMARK in the event that Atlas DE is the Defaulting
      Party under the Base Contract. GASMARK will, upon invoice, reimburse Atlas
      DE
      for the charges assessed by the issuing bank specifically for issuing the Atlas
      LC, up to a maximum reimbursement amount of $187,500 for the first annual
      period. The Atlas LC will be effective as of the Effective Date, and will remain
      in effect until September 30, 2006; provided,
      however,
      that if
      GASMARK’s Exposure as of September 30, 2006 exceeds the Collateral Threshold,
      Atlas DE will provide GASMARK with a new letter of credit to replace the Atlas
      LC, in the amount of the then expiring Atlas LC (the "Replacement
      LC").
      The
      Replacement LC shall terminate on the earlier of one year from the date of
      issuance or the expiration of the Base Contract. GASMARK will, upon invoice,
      reimburse Atlas DE for the charges assessed by the issuing bank specifically
      for
      issuing the Replacement LC, up to a maximum reimbursement amount of 1.875%
      of
      the face amount of the Replacement LC. The Replacement LC shall be subject
      to
      decrease as set forth in Section 2.4. It shall be a condition precedent to
      Atlas
      DE's performance under this section that GASMARK perform its obligations under
      Section 2.2.

     

    
      
         

      

      
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    2.5 Reduction
      of Posted Collateral.
      Commencing December 31, 2005 and on the last day of each month thereafter,
      GASMARK and Atlas DE will jointly review the amount of GASMARK’s Exposure under
      all prompt month and forward month Transactions entered into between the Parties
      under the Base Contract. If GASMARK and Atlas reasonably determine that (i)
      GASMARK’s Exposure is below Fifteen Million Dollars ($15,000,000), (ii) no Event
      of Default with respect to Atlas DE has occurred and is continuing, and (iii)
      no
      Early Termination Date has occurred or been designated by GASMARK for which
      there exists any unsatisfied payment obligations under the Base Contract, then
      the Atlas LC shall be amended, and GASMARK shall consent to such amendment,
      to
      reduce the amount of the Atlas LC to Five Million Dollars ($5,000,000). If
      GASMARK and Atlas DE reasonably determine that (i) GASMARK’s Exposure is below
      the Collateral Threshold, (ii) no Event of Default with respect to Atlas DE
      has
      occurred and is continuing, and (iii) no Early Termination Date has occurred
      or
      been designated by GASMARK for which there exists any unsatisfied payment
      obligations under the Base Contract, then Atlas DE will be permitted to
      terminate the Atlas LC. Any costs incurred by Atlas DE in reducing or
      terminating the Atlas LC will be borne solely by Atlas DE. 

    

    III.

    MISCELLANEOUS

    

    3.1 Warranties.
      Each
      Party represents and warrants to the others that it has the corporate authority
      to execute, deliver and perform this Amendment and has taken all actions
      necessary to secure all necessary approvals required to be secured in connection
      therewith. The execution, delivery and performance of this Amendment and the
      Base Contract have been duly authorized by all necessary corporate
      action.

    

    3.2. No
      Third Party Benefit.
      Nothing
      contained in this Amendment, express or implied, is intended to or shall be
      construed to confer upon or give any person, firm, or corporation, other than
      the Parties and their respective permitted successors and assigns, any remedy
      or
      claim under, or by reason of, this Amendment, or any term, covenant or condition
      hereof. All conditions, promises and agreements contained in this Amendment
      shall be for the sole and exclusive benefit of the Parties and their respective
      permitted successors and assigns.

    

    3.3 Entire
      Agreement.
      This
      Amendment and the Base Contract set forth the entire understanding and agreement
      between the Parties as to matters covered herein and therein and supersedes
      any
      other prior understanding, agreement or statement (written or oral) between
      the
      Parties as to matters covered herein and therein.

     

    
      
         

      

      
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    3.4 Headings.
      The
      headings contained in this Amendment are for convenience of reference only
      and
      shall not affect, in any way, the meaning or interpretation of this
      Amendment.

     

    3.5 Amendments;
      Waivers.
      To be
      binding, any amendment of this Amendment must be effected by an instrument
      in
      writing signed by all of the Parties. Rights
      hereunder shall not be waived, except pursuant to a writing signed by the Party
      against which enforcement of the waiver is sought.

     

    3.6 Rights
      and Remedies.
      The
      rights and remedies granted under this Amendment shall not be exclusive but
      shall be in addition to all other rights and remedies available under the Base
      Contract, at law or in equity. 

     

    3.7 Expenses
      of Negotiation.
      Except
      to the extent specifically provided herein, whether or not the transactions
      contemplated hereby are consummated, all costs and expenses incurred in
      connection with this Amendment are to be borne by the Party incurring such
      costs.

    

    3.8 Severability.
      It is
      the intention of the Parties hereto that whenever possible, each provision
      of
      the Base Contract and this Amendment will be interpreted in such manner as
      to be
      effective and valid under applicable law, but that if any provision of the
      Base
      Contract or this Amendment, as the case may be, is held to be invalid, illegal
      or unenforceable in any respect under any applicable law, such invalidity,
      illegality or unenforceability will not affect any other provision, and the
      Base
      Contract and this Amendment, as the case may be, will be reformed, construed
      and
      enforced in such jurisdiction as if such invalid, illegal or unenforceable
      provision had never been contained herein and/or therein, as the case may be.
      

    

    3.9 Counterparts;
      and Facsimile Signatures.
      This
      Amendment may be executed, including by facsimile signature, in one or more
      counterparts, each of which when so executed shall be deemed to be an original
      and all of which together shall constitute one and the same
      instrument.

    

    3.10 Governing
      Law.
      The
      interpretation and performance of this Amendment shall be governed by the laws
      of the jurisdiction indicated in the Base Contract.

    
      
         

      

      
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    IN
      WITNESS WHEREOF, the Parties hereto have duly executed this instrument or have
      caused this instrument to be duly executed on their behalf, on the Effective
      Date.

     

    
      	UGI
              ENERGY
              SERVICES, INC. 	 	
              ATLAS
                AMERICA, INC.,
                a
                Pennsylvania corporation
                

               

               

            
	By:	/s/ 	 	By:	/s/ 
	 	
              
Name: Bradley
              C. Hall	 	 	
              
Name:
	 	Title: President	 	 	Title:

    

     

    
       

      
        	ATLAS
                AMERICA, INC.,
                a
                Delaware corporation	 	 	
                 

                 

                 

              
	By:	 	 	 	 
	 	
                
Name: 	 	 	
              
	 	Title: 	 	 	 

      

       

      
        
           

        

        
          5

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