Exhibit 10.13

TRANSACTION CONFIRMATION, SUPPLY CONTRACT NO. 0001, UNDER BASE

CONTRACT FOR SALE AND PURCHASE OF NATURAL GAS DATED AS OF NOVEMBER

8, 2010 BETWEEN CHEVRON NATURAL GAS, A DIVISION OF CHEVRON U.S.A. INC.

AND ATLAS RESOURCES, LLC, VIKING RESOURCES, LLC, AND RESOURCE ENERGY,

LLC, DATED FEBRUARY 17, 2011. SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN

REDACTED, AS MARKED BY THREE ASTERISKS (***), BECAUSE CONFIDENTIAL

TREATMENT FOR THOSE TERMS HAS BEEN REQUESTED. THE REDACTED

MATERIAL HAS BEEN SEPARATELY FILED WITH THE SECURITIES AND EXCHANGE

COMMISSION.

[Redacted Copy]

Specific terms in this exhibit have been redacted, as marked by three asterisks
(***), because

confidential

treatment for those terms has been requested. The redacted material has been
separately filed

with the

Securities and Exchange Commission.

TRANSACTION CONFIRMATION, SUPPLY CONTRACT NO. 0001, UNDER BASE

CONTRACT

FOR SALE AND PURCHASE OF NATURAL GAS

DATED AS OF NOVEMBER 8, 2010

between

CHEVRON NATURAL GAS, A DIVISION OF CHEVRON U.S.A. INC.

and

ATLAS RESOURCES, LLC, VIKING RESOURCES, LLC, AND RESOURCE ENERGY, LLC,

DATED FEBRUARY 17, 2011

--------------------------------------------------------------------------------

TRANSACTION CONFIRMATION

FOR IMMEDIATE DELIVERY

SUPPLY CONTRACT NO. 0001

 

 

Date: February 17, 2011

  Transaction Confirmation #: 2011-02-17-YRIA

This Transaction Confirmation is subject to the Base Contract between Seller and
Buyer dated November 8, 2010. The terms of this Transaction Confirmation are
binding unless disputed in writing within 2 Business Days of receipt unless
otherwise specified in the Base Contract.

 

SELLER:    BUYER: Atlas Resources, LLC, Viking Resources, LLC and    Chevron
Natural Gas, a division of Chevron USA, Inc. Resource Energy, LLC (“Atlas”)   
Attn: Confirmation Department Attn: Bill Kurtz, Gas Marketing    Phone:
832-854-5110 Phone: (330) 339-3155 x112    Fax: 832-854-3292 Fax: (330) 339-5825
   Base Contract No. 0001 Base Contract No. 0001    Transporter: Various
Transporter: Various    Transporter Contract Number: Various Transporter
Contract Number: Various    Contract Price: See Special Provisions for Pricing
Terms    Delivery Period: See Special Provisions    End: See Special Provisions

Performance Obligation and Contract Quantity: (Select as appropriate; Closing
occurred on February 17, 2011)

Year:

þ Year 1 (Closing through March 31, 2012)

¨ Year 2 (12 months to 24 months following the Closing)

¨ Year 3 (24 months to 36 months following the Closing)

Firm Base Load Volume: þ

See Annex 1 attached.

Excess Daily Gas: ¨

                MMBtus/day

Delivery Point(s): See Special Provisions

(If a pooling point is used, list a specific geographic and pipeline location):

Special Conditions:

Special Provisions attached hereto as Schedule I (as amended) are incorporated
herein by reference.

 

* Firm (Variable Quantity) subject to Special Provisions

--------------------------------------------------------------------------------

Seller: Atlas Resources, LLC, Viking Resources, LLC and Resource Energy, LLC.
(severally and not jointly)     Buyer: Chevron Natural Gas, a division of
Chevron USA Inc. By:   /s/ Jeffrey C. Simmons     By:   /s/ J. Brent Faulk  
Name: Jeffrey C. Simmons       Name: J. Brent Faulk   Title: Executive Vice
President and Vice President       Title: Vice President Date: February 17, 2011
    Date: February 17, 2011

 

Copyright © 2006 North American Energy Standards Board, Inc.NAESB Standard 6.3.1
   All Rights Reserved     
  September 5,
2006   
  

 

Page 1of 2

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Annex 1

 

Gross

MMBtu/d

   Period Ending    2/28/2011   3/31/2011   4/30/2011   5/31/2011   6/30/2011  
7/31/2011   8/31/2011

Equitrans

   ***   ***   ***   ***   ***   ***   ***

Columbia

   ***   ***   ***   ***   ***   ***   ***

TETCO

   ***   ***   ***   ***   ***   ***   ***

NFGS

   ***   ***   ***   ***   ***   ***   ***

Dominion

   ***   ***   ***   ***   ***   ***   ***

Gross

MMBtu/d

   Period Ending    9/30/2011   10/31/2011   11/30/2011   12/31/2011   1/31/2012
  2/29/2012   3/31/2012

Equitrans

   ***   ***   ***   ***   ***   ***   ***

Columbia

   ***   ***   ***   ***   ***   ***   ***

TETCO

   ***   ***   ***   ***   ***   ***   ***

NFGS

   ***   ***   ***   ***   ***   ***   ***

Dominion

   ***   ***   ***   ***   ***   ***   ***

 

Copyright © 2006 North American Energy Standards Board, Inc.NAESB Standard 6.3.1
   All Rights Reserved     
  September 5,
2006   
  

 

Page 2 of 2

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SCHEDULE I

SPECIAL PROVISIONS

Attached to and Forming Part of

That certain Transaction Confirmation — SUPPLY CONTRACT NO. 0001

By and between Atlas Resources, LLC, Viking Resources, LLC and Resource Energy,
LLC (“Atlas”

or

“Seller”)

and

Chevron Natural Gas, a division of Chevron U.S.A. Inc. (“Chevron” or “Buyer”)

Dated as of February 17, 2011

These Special Provisions hereby modify, supplement and amend the Transaction
Confirmation — SUPPLY CONTRACT NO. 0001, dated and ratified as of the date
hereof (the “Transaction Confirmation”), and, solely to the extent described in
these Special Provisions with respect to the transaction(s) contemplated by the
Transaction Confirmation, the Base Contract between the parties referenced in
the Transaction Confirmation. All capitalized terms not otherwise defined herein
shall have the meaning set forth in the Base Contract between the parties
referenced in the Transaction Confirmation.

1. Amendments to Section 2 of the Base Contract: Section 2 is amended by adding
the following new definitions in alphabetical order:

“NYMEX Contract Price” means a per MMBtu price equal to the NYMEX Settle Price,
plus ***.

“NYMEX Settle Price” means a per MMBtu price equal to the NYMEX last day settle
price of one MMBtu of Gas for the next delivery Month.

2. Amendments of Section 4 of the Base Contract.

A. Amendment to Section 4.2 of the Base Contract: Section 4.2 is amended by
adding the following to the end of that Section: “Notwithstanding the foregoing,
Atlas Resources, LLC (“Resources”) shall (a) not more than 60 days following the
execution and delivery of the Restructuring Agreements (as defined below)
nominate on behalf of Seller the Base Load Firm Volume (as defined below)
Contract Quantity of Gas to be supplied, purchased and sold hereunder on a Firm
basis per day each Month (denominated in MMBtu/day) during Year 1 (as defined
below), and (b) not less than 60 days prior to the end of (i) Year 1, nominate
on behalf of Seller the Base Load Firm Volume Contract Quantity of Gas to be
supplied, purchased and sold hereunder on a Firm basis per day each Month
(denominated in MMBtu/day) during Year 2 and (ii) Year 2 (as defined below),
nominate on behalf of Seller the Base Load Firm Volume of Gas to be supplied,
purchased and sold hereunder on a Firm basis per day each Month (denominated in
MMBtu/day) during Year 3 (as defined below). In the event that Resources (or
Seller in lieu of Resources) fails to timely nominate Base Load Firm Volumes as
set forth above in clauses (i) or (ii) for the coming Year 2 or 3 time period
during the Delivery Period, then Resources shall be deemed to have nominated the
maximum Base Load Firm Volume for the coming Year 2 or 3 period set forth below
for the entire 12-month period. To the extent that Seller expects to supply more
Gas on any day than the applicable Base Load Firm Volume (“Excess Daily Gas”),
Resources will use commercially reasonable efforts to supply to Buyer no later
than 7:30 a.m. Central on each Business Day estimates of the aggregated volumes
of Excess Daily Gas to be delivered to that Delivery Point on the following Day,
and seasonal production volume forecasts for delivery of Excess Daily Gas into
that Delivery Point on a rolling 2-month basis during the Delivery Period.”

 

Page 1 of 4

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3. Pricing: With respect to any volumes of Gas purchased or sold pursuant to the
Transaction Confirmation, such volumes of Gas will be priced in accordance with
the following:

A. Supply of Firm Base Load Volume for each Delivery Point: The NYMEX Contract
Price.

B. Supply of Excess Daily Gas. Excess Daily Gas supplied by Seller to Buyer
hereunder shall be purchased by the Buyer on a Firm basis during the Delivery
Period. The parties will attempt to negotiate a mutually-agreeable price with
respect to any Excess Daily Gas based upon fair market value less a reasonable
marketing fee payable to Seller

4. Delivery Point and Firm Base Load Volume. The Firm Base Load Volume for each
Delivery Point (see list of meters that tie into each interstate line, which
list is attached hereto as Attachment 1; for the Transaction Confirmation,
“Delivery Point” shall mean any or all of the meters listed for each interstate
line) shall be as set forth below and shall be specified on a Month-to-Month
basis as set forth in Section 2(a) above:

All Base Load Volume Contract Quantities set forth below are denominated in
MMBtu/day.

 

Delivery Point

  

Year 1 Base Load Volume

   Year 2 Base Load Volume    Year 3 Base Load Volume Equitrans    ***    ***   
*** Columbia    ***    ***    *** TETCO    ***    ***    *** NFGS    ***    ***
   *** Dominion    ***    ***    ***

5. Delivery Period. The Delivery Period will commence on the day of the
“Closing” as defined in and occurring under (i) that certain Transaction
Agreement by and among Atlas Energy, Inc., Atlas Energy Resources, LLC, Atlas
Pipeline Holdings, L.P. and Atlas Pipeline Holdings GP, LLC. dated as of
November 8, 2010 (the “Transaction Agreement”) and (ii) Agreement and Plan of
Merger by and among Chevron Corporation, Arkhan Corporation and Atlas Energy,
Inc. dated as of November 8, 2010 (the “Merger” and together with the
Transaction Agreement, collectively, the “Restructuring Agreements”); provided
that if the Closing for the Restructuring Agreements occur on different calendar
dates, then so long as both Closings occur, the Delivery Period will commence on
the later calendar date of Closing. The Delivery Period will end on March 31,
2014. As noted above, for the purposes of establishing the Firm Base Load
Volume, the Delivery Period shall be divided into three (3) periods: Year 1
beginning at the Closing and ending on March 31, 2012, Year 2 beginning April 1,
2012 and ending on March 31, 2013, and Year 3 beginning on April 1, 2013 and
ending on March 31, 2014.

6. Duty to Mitigate. Notwithstanding anything in Section 3 of the Contract to
the contrary, in the event that Seller fails to deliver sufficient volumes of
Gas on any Day to meet its Firm Base Load Volume Contract Quantity obligation,
then Buyer will use commercially reasonable efforts to mitigate the costs to
cover any portion of the difference between the Firm Base Load Volume Contract
Quantity and the volume actually delivered by Seller.

7. Several Liability. The liability and obligations of each Seller party under
this Transaction Confirmation and as parties to the Base Contract shall be
several, and not joint.

 

Page 2 of 4

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IN WITNESS WHEREOF, and intending to be legally bound, the parties hereto have
caused these Special Provisions to be executed by their respective duly
authorized representatives as of the date first set forth above.

 

Atlas Resources, LLC, Viking Resources, LLC and Resource Energy, LLC. (severally
and not jointly)     Chevron Natural Gas, a division of Chevron U.S.A. Inc. By:
  /s/ Matthew A. Jones     By:   /s/ J. Brent Faulk   Name: Matthew A. Jones    
  Name: J. Brent Faulk   Title: Chief Financial Officer       Title: Vice
President

 

Page 3 of 4

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Attachment 1

Delivery Points

***

 

Page 4 of 4