Document:

ex10_1.htm

    
      
        
          

        
Exhibit 10.1

       

    

    
      RR2007LP

    

    
      Garfield
County

    

    
      

       

      ASSIGNMENT
OF WORKING INTEREST 

      Wellbore
Only

    

    
       

       

      This
Assignment of Working Interest ("Assignment") is made and entered into this 21st
day of August, 2007 from PETROLEUM
DEVELOPMENT CORPORATION, a Nevada Corporation, (herein called "Assignor")
to ROCKIES
REGION 2007 LIMITED PARTNERSHIP, (herein called
"Assignee");

    

    
       

       

      WITNESSETH

    

    
       

      Assignor,
for the sum of One Dollar ($1.00) and other valuable consideration, the receipt
of which is hereby acknowledged, does by these presents GRANT, BARGAIN, SELL,
EXCHANGE, CONVEY, ASSIGN, TRANSFER, SET OVER and DELIVER unto Assignee all of
the following:

    

    
       

      1.  The specific
undivided interest shown in Exhibit A in respect of each of the oil and gas
leases shown in Exhibit A, but only to the extent such leases cover lands and
depths necessary for production of the specific oil and gas well identified in
Exhibit A. This is intended to be a "wellbore assignment." Assignee shall be
entitled to receive that share of production from the well identified in Exhibit
A which is attributable to the undivided interest here being assigned, but the
Assignee shall have, as a result of this Assignment, no interest whatsoever in
any other oil and gas well, whether now existing or hereafter drilled, which may
be located on the lands described in Exhibit A or on any land pooled therewith.
Assignor expressly excepts from this Assignment and reserves to itself, its
successors and assigns, the remainder of the lease and the leasehold oil and gas
estate, including (without limitation) the right to produce other wells which
are or may be located on the lands described in Exhibit A and lands pooled
therewith, without the obligation to account to Assignee for any such other
production.

    

    
       

      2.  The specific
undivided interest shown in Exhibit A in all valid unitization, pooling,
operating and communitization agreements, declarations and orders involving the
leasehold interests here being assigned, but only to the extent that such
agreements, declarations and orders relate to the well specifically identified
in Exhibit A and in all other respects limited to the manner as set forth in
Paragraph 1, above.

    

    
       

      3. 
The specific undivided interest shown in Exhibit A in all valid oil and gas
sales, purchase, exchange and processing contracts, but only to the extent that
such contracts relate to the well specifically identified in Exhibit A and in
all other respects limited in the manner set forth in Paragraph 1,
above.

    

    
       

      4. 
The specific undivided interest shown in Exhibit A in all personal property,
improvements, lease and well equipment, easements, permits, licenses, servitudes
and rights-of-way now owned by Assignor and being used in connection with the
operation of the well specifically identified in Exhibit A or in connection with
the production, treating, storing, transportation or marketing of oil, gas and
other minerals from that well, but in all respects limited in the manner set
forth in Paragraph 1, above.

       

      TO HAVE AND TO HOLD the
interests described unto Assignee, its successors
and assigns, forever. 

    

    
      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

       

      This
Assignment is made without warranties of any type (whether of title,
merchantability or fitness for a particular use), either express or implied, but
is made with full substitution of Assignee in all covenants and warranties
previously given or made by others, but only to the extent of the interests here
assigned. Assignor does, however, expressly intend that this Assignment convey
any title that Assignor may hereafter acquire to the extent that such
after-acquired title may be necessary to fulfill the interests herein
assigned.

    

    
       

      Assignee
shall bear its proportionate share of ail burdens on production now of record
and hereby assumes its proportionate share of all other obligations that relate
to the well specifically identified in Exhibit A and the production there
from.

    

    
       

      Both
Assignor and Assignee hereby agree to execute and deliver such additional
instruments, notices, division orders, transfer orders and other documents as
may reasonably be requested by the other, and to do such other acts and things,
as may be necessary or convenient to accomplish this Assignment in the manner
and to the extent described in Paragraph 1, above.

    

    
       

      IN
WITNESS WHEREOF, Petroleum Development Corporation has executed and delivered
this instrument, with the intention that it shall be effective as of the spud
date of the well specifically identified in Exhibit A.

       

       

      
        	   	 PETROLEUM
      DEVELOPMENT CORPORATION 
	   	 A
      Nevada Corporation 
	   	   
	   	 BY: /s/ Deward
      W. Gerdom 
	   	
                 Deward W.
      Gerdom 

              
	   	
                 Vice
      President 

              

      

       

       

    

    
      	 STATE OF
      WELD	
              
                )

              

            	  
	 	
              
                )

              

            	
              
                TO-WIT:

              

            
	 COUNTY OF
      COLORADO	
              
                )

              

            	 
  

    

     

    
      
        The
foregoing instrument was acknowledged before me this 21st day of August, 2007 by
Deward Gerdom, as Vice President for Petroleum Development Corporation, a Nevada
Corporation, for and on behalf of the Corporation. He executed the foregoing for
the purposes therein contained

      

      
         

        
          	 	/s/ Carrie
      Eggleston	 
	 	Carrie
      Eggleston	 
	 	Notary
    Public-	Colorado	 
	 	 	County of
      Denver	 
	 	My Commission
      expires:	October 12,
      2010	 

        

         

         

        After
recording, return to:

      

    

     

    
      Petroleum
Development Corporation

      1775
Sherman Street, Suite 3000

      
        Denver,
CO 80203

        Ph:  303-860-5800

         

        
          
            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

      

    

     

    
      
        
          
            	 	
                    Exhibit
      "A"

                  	
                    Garfield
      County, Colorado

                  

          

          Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between

          Petroleum
Development Corporation and Rockies Region 2007 Limited Partnership

           

          
            
              	
                      
                        WELL#

                      

                    	 	
                      
                        WELL
      NAME

                      

                    	 	
                      
                        WORKING
      INT.

                      

                    	 	
                      
                        TWP

                      

                    	 	
                      
                        RNG

                      

                    	 	
                      
                        SEC

                      

                    	 	
                      
                        BHLQ/Q

                      

                    	 	
                      
                        SPUD
      DATE

                      

                    	 	
                      
                        LEASE
      #

                      

                    	 	
                      
                        LESSOR

                      

                    	 	
                      
                        LESSEE

                      

                    	 	
                      
                        LEASE
      DATE

                      

                    	 	
                      
                        BOOK

                      

                    	 	
                      
                        PAGE

                      

                    	 	
                      
                        REC

                      

                    
	
                      
                        08011

                      

                    	 	
                      
                        Chevron
      32D-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        SWNE

                      

                    	 	
                      
                        1/6/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08010

                      

                    	 	
                      
                        Chevron
      32B-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        SWNE

                      

                    	 	
                      
                        1/22/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08009

                      

                    	 	
                      
                        Chevron
      32A-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        SWNW

                      

                    	 	
                      
                        2/4/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08012

                      

                    	 	
                      
                        Chevron
      33A-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NWSW

                      

                    	 	
                      
                        2/9/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08013

                      

                    	 	
                      
                        Chevron
      33B-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NWSE

                      

                    	 	
                      
                        2/13/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08004

                      

                    	 	
                      
                        Chevron
      33D-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NWSE

                      

                    	 	
                      
                        2/17/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08008

                      

                    	 	
                      
                        Chevron
      23B-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NESW

                      

                    	 	
                      
                        2/24/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08007

                      

                    	 	
                      
                        Chevron
      23A-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NESW

                      

                    	 	
                      
                        2/28/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        08006

                      

                    	 	
                      
                        Chevron
      22D-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        SENW

                      

                    	 	
                      
                        3/9/2008

                      

                    	 	
                      
                        COL00067.000

                      

                    	 	
                      
                        Chevron
      U.S.A. Inc.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/2002

                      

                    	 	
                      
                        1447

                      

                    	 	
                      
                        573

                      

                    	 	
                      
                        623086

                      

                    
	
                      
                        07450

                      

                    	 	
                      
                        Puckett
      31D-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NWNE

                      

                    	 	
                      
                        9/1/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07446

                      

                    	 	
                      
                        Puckett
      31A-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NWNE

                      

                    	 	
                      
                        9/15/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07835

                      

                    	 	
                      
                        Puckett
      42A-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        SENE

                      

                    	 	
                      
                        10/8/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07839

                      

                    	 	
                      
                        Puckett
      21D-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NENW

                      

                    	 	
                      
                        10/20/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07841

                      

                    	 	
                      
                        Puckett
      41D-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NENE

                      

                    	 	
                      
                        10/21/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07838

                      

                    	 	
                      
                        Puckett
      21C2-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NENW

                      

                    	 	
                      
                        11/1/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07840

                      

                    	 	
                      
                        Puckett
      41C-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NENE

                      

                    	 	
                      
                        11/13/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07452

                      

                    	 	
                      
                        Puckett
      32B-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        SWNE

                      

                    	 	
                      
                        11/14/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07738

                      

                    	 	
                      
                        Puckett
      21A-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NENW

                      

                    	 	
                      
                        11/24/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07455

                      

                    	 	
                      
                        Puckett
      32D-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        SWNE

                      

                    	 	
                      
                        11/30/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        08003

                      

                    	 	
                      
                        Puckett
      33D-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NWSE

                      

                    	 	
                      
                        1/20/2008

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        08002

                      

                    	 	
                      
                        Puckett
      33C2-25D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        6S

                      

                    	 	
                      
                        97W

                      

                    	 	
                      
                        25

                      

                    	 	
                      
                        NWSE

                      

                    	 	
                      
                        2/2/2008

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07444

                      

                    	 	
                      
                        Puckett
      11D-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        7S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NWNW

                      

                    	 	
                      
                        9/18/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    
	
                      
                        07442

                      

                    	 	
                      
                        Puckett
      11B-7D

                      

                    	 	
                      
                        0.99981000

                      

                    	 	
                      
                        7S

                      

                    	 	
                      
                        96W

                      

                    	 	
                      
                        7

                      

                    	 	
                      
                        NWNW

                      

                    	 	
                      
                        10/5/2007

                      

                    	 	
                      
                        COL00077.000

                      

                    	 	
                      
                        Puckett
      Land Co.

                      

                    	 	
                      
                        Petroleum
      Development Corporation

                      

                    	 	
                      
                        11/15/1999

                      

                    	 	
                      
                        1164

                      

                    	 	
                      
                        400

                      

                    	 	
                      
                        556562

                      

                    

            

             

             

            
              
                
                

              

              
                Page 1 of
2

                
                  

                

              

              
                
                

              

               

            

          

        

      

    

    
      	
            	
              Exhibit
      "A"

            	
              Garfield
      County, Colorado

            

      Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between

      Petroleum
Development Corporation and Rockies Region 2007 Limited Partnership

       

    

    
      
        	
                
                  WELL#

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  BHL
      Q/Q

                

              	 
      	
                
                  SPUD
      DATE

                

              	 
      	
                
                  LEASE
      #

                

              	 
      	
                
                  LESSOR

                

              	 
      	
                
                  LESSEE

                

              	 	
                
                  LEASE
      DATE

                

              	 	
                
                  BOOK

                

              	 	
                
                  PAGE

                

              	 	
                
                  REC

                

              
	
                
                  07440

                

              	 
      	
                
                  Puckett
      11A-7D

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7S

                

              	 
      	
                
                  96W

                

              	 
      	
                
                  7

                

              	 
      	
                
                  NWNW

                

              	 
      	
                
                  10/21/2007

                

              	 
      	
                
                  COL00077.000

                

              	 
      	
                
                  Puckett
      Land Co.

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 	
                
                  11/15/1999

                

              	 	
                
                  1164

                

              	 	
                
                  400

                

              	 	
                
                  556562

                

              
	
                
                  07438

                

              	 
      	
                
                  Puckett
      12A-18D

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7S

                

              	 
      	
                
                  96W

                

              	 
      	
                
                  18

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  8/24/2007

                

              	 
      	
                
                  COL00077.000

                

              	 
      	
                
                  Puckett
      Land Co.

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 	
                
                  11/15/1999

                

              	 	
                
                  1164

                

              	 	
                
                  400

                

              	 	
                
                  556562

                

              

      

       

       

      
        
          When
Recorded Please Return To:

        

        
          Petroleum
Development Corporation

        

        
          1775
Sherman St., Suite 3000

        

        
          Denver,
CO 80203

        

        
          Attn:
Jenni L. Muller

        

      

    

     

    
      
        
        

      

      
        Page 2 of
2

        
          

        

      

      
        
        

      

    

     

    
      RR2007LP

    

    
      Weld
County

       

      
         

        ASSIGNMENT
OF WORKING INTEREST

        Wellbore
Only

      

    

    
      
 

    

    
      This
Assignment of Working Interest ("Assignment") is made and entered into this 21st
day of August, 2007 from PETROLEUM DEVELOPMENT CORPORATION, a Nevada
Corporation, (herein called "Assignor") to ROCKIES REGION 2007 LIMITED
PARTNERSHIP, (herein called "Assignee");

    

    
      

       

      WITNESSETH

    

    
       

      Assignor,
for the sum of One Dollar ($1.00) and other valuable consideration, the receipt
of which is hereby acknowledged, does by these presents GRANT, BARGAIN, SELL,
EXCHANGE, CONVEY, ASSIGN, TRANSFER, SET OVER and DELIVER unto Assignee the
following:

    

    
       

      1.   An
undivided 99.981 percent (99.981%) of Assignor's right, title and interest (the
"Subject Interest") in the oil and gas leases shown in Exhibit A, but only to
the extent such leases cover lands and depths necessary for production of the
specific oil and gas well identified in Exhibit A. This is intended to be a
"wellbore assignment." Assignee shall be entitled to receive that share of
production from the well identified in Exhibit A which is attributable to the
undivided interest here being assigned, but the Assignee shall have, as a result
of this Assignment, no interest whatsoever in any other oil and gas well,
whether now existing or hereafter drilled, which may be located on the lands
described in Exhibit A or on any land pooled therewith. Assignor expressly
excepts from this Assignment and reserves to itself, its successors and assigns,
the remainder of the lease and the leasehold oil and gas estate, including
(without limitation) the right to produce other wells which are or may be
located on the lands described in Exhibit A and lands pooled therewith, without
the obligation to account to Assignee for any such other
production.

    

    
       

      2.   The
Subject Interest in all valid unitization, pooling, operating and
communitization agreements, declarations and orders involving the leasehold
interests here being assigned, but only to the extent that such agreements,
declarations and orders relate to the well specifically identified in Exhibit A
and in all other respects limited to the manner as set forth in Paragraph 1,
above.

    

     

    
      3.   The
Subject Interest in all valid oil and gas sales, purchase, exchange and
processing contracts, but only to the extent that such contracts relate to the
well specifically identified in Exhibit A and in alt other respects limited in
the manner set forth in Paragraph 1, above.

    

    
       

      4.   The
Subject Interest in all personal property, improvements, lease and well
equipment, easements, permits, licenses, servitudes and rights-of-way now owned
by Assignor and being used in connection with the operation of the well
specifically identified in Exhibit A or in connection with the production,
treating, storing, transportation or marketing of oil, gas and other minerals
from that well, but in all respects limited in the manner set forth in Paragraph
1, above.

    

    
       

      TO HAVE
AND TO HOLD the interests described unto Assignee, its successors and assigns,
forever.

    

    

    
      
        
           

        

        
           

          
            

          

        

        
           

        

      

    

    
       

      This
Assignment is made without warranties of any type (whether of title,
merchantability or fitness for a particular use), either express or implied, but
is made with full substitution of Assignee in all covenants and warranties
previously given or made by others, but only to the extent of the interests here
assigned. Assignor does, however, expressly intend that this Assignment convey
any title that Assignor may hereafter acquire to the extent that such
after-acquired title may be necessary to fulfill the interests herein
assigned.

    

    
       

      Assignee
shall bear its proportionate share of all burdens on production now of record
and hereby assumes its proportionate share of all other obligations that relate
to the well specifically identified in Exhibit A and the production there
from.

    

    
       

      Both
Assignor and Assignee hereby agree to execute and deliver such additional
instruments, notices, division orders, transfer orders and other documents as
may reasonably be requested by the other, and to do such other acts and things,
as may be necessary or convenient to accomplish this Assignment in the manner
and to the extent described in Paragraph 1, above.

    

    
       

      IN
WITNESS WHEREOF, Petroleum Development Corporation has executed and delivered
this instrument, with the intention that it shall be effective as of the spud
date of the well specifically identified in Exhibit A.

       

    

    
      	 
      	
              PETROLEUM
      DEVELOPMENT CORPORATION

            
	 
      	
              A
      Nevada Corporation

            
	 
      	 
      	 
      
	 
      	
              BY:

            	/s/
      Deward W. Gerdom
	 
      	 
      	
              Deward
      W. Gerdom

            
	 
      	 
      	
              Vice
      President

            

    

    

    

    
      	
              STATE
      OF WELD

            	
              )

            	 
      
	 
      	
              )

            	
              TO-WIT:

            
	
              COUNTY
      OF COLORADO

            	
              )

            	 
      

    

    
       

      The
foregoing instrument was acknowledged before me this 21st day of August, 2007 by
Deward Gerdom, as Vice President for Petroleum Development Corporation, a Nevada
Corporation, for and on behalf of the Corporation. He executed the foregoing for
the purposes therein contained.

    

    
      

    

    
      	 
      	/s/
      Carrie Eggleston
	 
      	
              Carrie
      Eggleston

            
	 
      	
              Notary
      Public-

            	
              Colorado

            
	 
      	 
      	
              County
      of Denver

            
	 
      	
              My
      Commission expires:  October 12,
2010

            

    

    
      
 

    

    
      After
recording, return to:

       

      Petroleum
Development Corporation

    

    
      1775
Sherman Street, Suite 3000

    

    
      Denver,
CO 80203

    

    
      Ph:  303-860-5800

    

    

    
      
        
           

        

        
           

          
            

          

        

        
           

        

      

    

     

    
      
        	 	
                 Exhibit
    "A"

              	
                 Weld County,
      Colorado

              

      

    

    Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

    

    
      
        	
                
                  WELL
      #

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  Q/Q

                

              	 
      	
                
                  Spud
      Date

                

              	 
      	
                
                  PDC
      Lease Number

                

              	 
      	
                
                  Lessor

                

              	 
      	
                
                  Lessee

                

              	 
      	
                
                  Lease
      Date

                

              	 
      	
                
                  Book

                

              	 
      	
                
                  Rec

                

              
	
                
                  08237

                

              	 
      	
                
                  Guttersen
      32-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  2N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  SWNE

                

              	 
      	
                
                  2/7/2008

                

              	 
      	
                
                  COL00372.000

                

              	 
      	
                
                  John
      H. Cuykendall and Edith P. Cuykendall

                

              	 
      	
                
                  T.S.
      Pace

                

              	 
      	
                
                  2/6/1970

                

              	 
      	
                
                  621

                

              	 
      	
                
                  1543443

                

              
	
                
                  08236

                

              	 
      	
                
                  Guttersen
      31-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  2N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  2/13/2008

                

              	 
      	
                
                  COL00372.000

                

              	 
      	
                
                  John
      H. Cuykendall and Edith P. Cuykendall

                

              	 
      	
                
                  T.S.
      Pace

                

              	 
      	
                
                  2/6/1970

                

              	 
      	
                
                  621

                

              	 
      	
                
                  1543443

                

              
	
                
                  07879

                

              	 
      	
                
                  Guttersen
      43-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  8/27/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07878

                

              	 
      	
                
                  Guttersen
      33-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  9/3/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07880

                

              	 
      	
                
                  Guttersen
      44-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  9/9/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07877

                

              	 
      	
                
                  Guttersen
      34-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  9/14/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07875

                

              	 
      	
                
                  Guttersen
      23-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  NESW

                

              	 
      	
                
                  9/20/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07876

                

              	 
      	
                
                  Guttersen
      24-6

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  6

                

              	 
      	
                
                  SESW

                

              	 
      	
                
                  9/25/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L
      F. Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07987

                

              	 
      	
                
                  Guttersen
      8D

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  11/2/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07986

                

              	 
      	
                
                  Guttersen
      34-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  11/7/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07983

                

              	 
      	
                
                  Guttersen
      43-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  11/12/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07985

                

              	 
      	
                
                  Guttersen
      44-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  11/16/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07984

                

              	 
      	
                
                  Guttersen
      33-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  11/20/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08035

                

              	 
      	
                
                  Guttersen
      8C

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  1/2/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08036

                

              	 
      	
                
                  Guttersen
      31-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  1/9/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08037

                

              	 
      	
                
                  Guttersen
      32-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  SWNE

                

              	 
      	
                
                  1/15/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08038

                

              	 
      	
                
                  Guttersen
      42-8

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  8

                

              	 
      	
                
                  SENE

                

              	 
      	
                
                  1/21/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08201

                

              	 
      	
                
                  Guttersen
      33-18

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  18

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  1/27/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08202

                

              	 
      	
                
                  Guttersen
      43-18

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  18

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  2/2/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08239

                

              	 
      	
                
                  Guttersen
      21-28

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  28

                

              	 
      	
                
                  NENW

                

              	 
      	
                
                  2/19/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08238

                

              	 
      	
                
                  Guttersen
      11-28

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  28

                

              	 
      	
                
                  NWNW

                

              	 
      	
                
                  2/25/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08389

                

              	 
      	
                
                  Guttersen
      22-28

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  28

                

              	 
      	
                
                  SENW

                

              	 
      	
                
                  3/2/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08388

                

              	 
      	
                
                  Guttersen
      12-28

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  28

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  3/8/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              

      

      

        
          
             

          

          
            Page 1 of
6

            
              

            

          

          
             

          

        

      

    

     

    
      	 	
              Exhibit "A"
    

            	
               Weld County,
      Colorado

            

    

    Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

     

    
      
        	
                
                  WELL#

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  Q/Q

                

              	 
      	
                
                  Spud
      Date

                

              	 
      	
                
                  PDC
      Lease Number

                

              	 
      	
                
                  Lessor

                

              	 
      	
                
                  Lessee

                

              	 
      	
                
                  Lease
      Date

                

              	 
      	
                
                  Book

                

              	 
      	
                
                  Rec

                

              
	
                
                  08390

                

              	 
      	
                
                  Guttersen
      28A

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  28

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  3/14/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F. Ranch
      Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71127

                

              	 
      	
                
                  Guttersen
      30A

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  30

                

              	 
      	
                
                  NWNW

                

              	 
      	
                
                  12/8/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71124

                

              	 
      	
                
                  Guttersen
      12-30

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  30

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  12/14/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71126

                

              	 
      	
                
                  Guttersen
      22-30

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  30

                

              	 
      	
                
                  SENW

                

              	 
      	
                
                  12/20/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71123

                

              	 
      	
                
                  Guttersen
      11-30

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  30

                

              	 
      	
                
                  NWNW

                

              	 
      	
                
                  12/26/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08313

                

              	 
      	
                
                  Guttersen
      43-31

                

              	 
      	 
      	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  31

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  3/1/2008

                

              	 
      	
                
                  COL00372.000

                

              	 
      	
                
                  John
      H. Cuykendall and Edith P. Cuykendall

                

              	 
      	
                
                  T.S.
      Pace

                

              	 
      	
                
                  2/6/1970

                

              	 
      	
                
                  621

                

              	 
      	
                
                  1543443

                

              
	
                
                  08312

                

              	 
      	
                
                  Guttersen
      33-31

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  31

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  3/7/2008

                

              	 
      	
                
                  COL00372.000

                

              	 
      	
                
                  John
      H. Cuykendall and Edith P. Cuykendall

                

              	 
      	
                
                  T.S
      Pace

                

              	 
      	
                
                  2/6/1970

                

              	 
      	
                
                  621

                

              	 
      	
                
                  1543443

                

              
	
                
                  08314

                

              	 
      	
                
                  Guttersen
      43-32

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  32

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  3/17/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08315

                

              	 
      	
                
                  Guttersen
      33-32

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  32

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  3/22/2008

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  08316

                

              	 
      	
                
                  Guttersen
      23-33

                

              	 
      	 
      	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  NESW

                

              	 
      	
                
                  3/12/2008

                

              	 
      	
                
                  COL00373.000

                

              	 
      	
                
                  Champlin
      Petroleum Company

                

              	 
      	
                
                  Amoco
      Production Company

                

              	 
      	
                
                  8/2/1977

                

              	 
      	
                
                  806

                

              	 
      	
                
                  1727554

                

              
	
                
                  08317

                

              	 
      	
                
                  Guttersen
      24-33

                

              	 
      	 
      	 
      	
                
                  3N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SESW

                

              	 
      	
                
                  3/19/2008

                

              	 
      	
                
                  COL00373.000

                

              	 
      	
                
                  Champlin
      Petroleum Company

                

              	 
      	
                
                  Amoco
      Production Company

                

              	 
      	
                
                  8/2/1977

                

              	 
      	
                
                  806

                

              	 
      	
                
                  1727554

                

              
	
                
                  07903

                

              	 
      	
                
                  Guttersen
      34-12

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  12

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  10/1/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07900

                

              	 
      	
                
                  Guttersen
      44-12

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  12

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  10/8/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07902

                

              	 
      	
                
                  Guttersen
      33-12

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  12

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  10/14/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07901

                

              	 
      	
                
                  Guttersen
      43-12

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  12

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  10/20/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  07904

                

              	 
      	
                
                  Guttersen
      12D

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  12

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  10/27/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71066

                

              	 
      	
                
                  Guttersen
      41-13

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  13

                

              	 
      	
                
                  NENE

                

              	 
      	
                
                  11/2/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L
      F. Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	
                
                  71068

                

              	 
      	
                
                  Guttersen
      13C

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  13

                

              	 
      	
                
                  SENE

                

              	 
      	
                
                  11/9/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              

      

    

    

      
        
           

        

        
          Page 2 of
6

          
            

          

        

        
           

        

      

    

     

    
    

     

    
      	 	
              Exhibit
    "A"

            	
              Weld County,
      Colorado

            

    

    Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

    

    
      
        	
                
                  WELL
      #

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  Q/Q

                

              	 
      	
                
                  Spud
      Date

                

              	 
      	
                
                  PDC
      Lease Number

                

              	 
      	
                
                  Lessor

                

              	 
      	
                
                  Lessee

                

              	 
      	
                
                  Lease
      Date

                

              	 
      	
                
                  Book

                

              	 
      	
                
                  Rec

                

              
	
                
                  71070

                

              	 
      	
                
                  Guttersen
      42-13

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  13

                

              	 
      	
                
                  SENE

                

              	 
      	
                
                  11/17/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  71067

                

              	 
      	
                
                  Guttersen
      31-13

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  13

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  11/25/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  71069

                

              	 
      	
                
                  Guttersen
      32-13

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  3N

                

              	 
      	
                
                  64W

                

              	 
      	
                
                  13

                

              	 
      	
                
                  SWNE

                

              	 
      	
                
                  12/2/2007

                

              	 
      	
                
                  COL00374.000

                

              	 
      	
                
                  L.F.
      Ranch Company

                

              	 
      	
                
                  Mel
      C. Bedinger

                

              	 
      	
                
                  7/2/1964

                

              	 
      	
                
                  518

                

              	 
      	
                
                  1440221

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Michael
      Guttersen and Henrietta Quinn

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07268

                

              	 
      	
                
                  Kohlhoff
      33-2

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  2

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  10/2/2007

                

              	 
      	
                
                  COL00420.001

                

              	 
      	
                
                  Guttersen

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3451368

                

              
	
                
                  07269

                

              	 
      	
                
                  Kohlhoff
      34-2

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  2

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  10/12/2007

                

              	 
      	
                
                  COL00420.002

                

              	 
      	
                
                  Betty
      L. Campbell, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3459448

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Tommy
      W. Kime and Bobetta A. Kime,

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00420.003

                

              	 
      	
                
                  husband
      and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3459454

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Henry
      Kohlhoff, as Trustee of the Henry

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Kohlhoff
      Trust for the Benefit of Anne

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00420.004

                

              	 
      	
                
                  Marie
      Kohlhoff

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  9/10/2007

                

              	 
      	 
      	 
      	
                
                  3504755

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Michael
      Guttersen and Henrietta Quinn

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07273

                

              	 
      	
                
                  Kohlhoff
      44-2

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  2

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  10/6/2007

                

              	 
      	
                
                  COL00420.001

                

              	 
      	
                
                  Guttersen

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3451368

                

              
	
                
                  07272

                

              	 
      	
                
                  Kohlhoff
      43-2

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  2

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  10/19/2007

                

              	 
      	
                
                  COL00420.002

                

              	 
      	
                
                  Betty
      L. Campbell, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3459448

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Tommy
      W. Kime and Bobetta A. Kime,

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00420.003

                

              	 
      	
                
                  husband
      and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3459454

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Henry
      Kohlhoff, as Trustee of the Henry

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Kohlhoff
      Trust for the Benefit of Anne

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00420.004

                

              	 
      	
                
                  Marie
      Kohlhoff

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  9/10/2007

                

              	 
      	 
      	 
      	
                
                  3504755

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  James
      W. Rice, as Trustee of the Rice

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Family
      Trust, under the will of William

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      

      

       

      
        
          
          

        

        
          Page 3 of
6

          
            

          

        

        
          
          

        

      

       

      
        	
              	
                Exhibit
    "A"

              	
                Weld County,
      Colorado

              

        Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

         

      

      
        	
                
                  WELL
      #

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  Q/Q

                

              	 
      	
                
                  Spud
      Date

                

              	 
      	
                
                  PDC
      Lease Number

                

              	 
      	
                
                  Lessor

                

              	 
      	
                
                  Lessee

                

              	 
      	
                
                  Lease
      Date

                

              	 
      	
                
                  Book

                

              	 
      	
                
                  Rec

                

              

      

      
        	
                
                  08244

                

              	 
      	
                
                  Cook
      43-20

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  20

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  2/16/2008

                

              	 
      	
                
                  COL00151.001

                

              	 
      	
                
                  D.
      Rice

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  3/8/2007

                

              	 
      	 
      	 
      	
                
                  3462990

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  James
      W. Rice, as Trustee of the Rice

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Family
      Trust, under the will of William

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08245

                

              	 
      	
                
                  Cook
      44-20

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  20

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  2/20/2008

                

              	 
      	
                
                  COL00151.001

                

              	 
      	
                
                  D.
      Rice

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  3/8/2007

                

              	 
      	 
      	 
      	
                
                  3462990

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Pim
      Lynn Nesbitt as Trustee of the Wayne E. Nesbitt and
      Ethel

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08246

                

              	 
      	
                
                  Cook
      33-20

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  20

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  2/24/2008

                

              	 
      	
                
                  COL00151.002

                

              	 
      	
                
                  M.
      Nesbitt Revocable Trust dated May 14,1997

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  3/9/2005

                

              	 
      	 
      	 
      	
                
                  3301778

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Brooke
      L. Hale & Dusty W. Hale, wife

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08247

                

              	 
      	
                
                  Cook
      34-20

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  20

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  2/29/2008

                

              	 
      	
                
                  COL00151.003

                

              	 
      	
                
                  and
      husband

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  2/27/2008

                

              	 
      	 
      	 
      	 
      
	
                
                  08248

                

              	 
      	
                
                  Cook
      20 D

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  6N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  20

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  3/6/2008

                

              	 
      	
                
                  COL00819.000

                

              	 
      	
                
                  Julia
      M. Cook

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/17/2005

                

              	 
      	 
      	 
      	
                
                  3271245

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Donald
      L. Carmichael and Michele M.

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07216

                

              	 
      	
                
                  Carmichael
      43-26

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  26

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  9/22/2007

                

              	 
      	
                
                  COL00053.001

                

              	 
      	
                
                  Carmichael,
      joint tenants

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  7/30/2006

                

              	 
      	 
      	 
      	
                
                  3436007

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Tommy
      W. Kime and Bobetta A. Kime,

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07214

                

              	 
      	
                
                  Carmichael
      33-26

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  26

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  9/26/2007

                

              	 
      	
                
                  COL00053.002

                

              	 
      	
                
                  husband
      and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  8/13/2006

                

              	 
      	 
      	 
      	
                
                  3459452

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Michael
      Guttersen and Henrietta Quinn

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00053.003

                

              	 
      	
                
                  Guttersen

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3451369

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00053.004

                

              	 
      	
                
                  Betty
      L. Campbell, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3459445

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07280

                

              	 
      	
                
                  Wahlert
      41-34

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  NENE

                

              	 
      	
                
                  9/4/2007

                

              	 
      	
                
                  COL00057.001

                

              	 
      	
                
                  Wahlert
      Land & Livestock, LLC

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	
                
                  3451371

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Michael
      Guttersen and Henrietta Quinn

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07281

                

              	 
      	
                
                  Wahlert
      42-34

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  63W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  SENE

                

              	 
      	
                
                  9/8/2007

                

              	 
      	
                
                  COL00057.002

                

              	 
      	
                
                  Guttersen

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  10/20/2006

                

              	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07204

                

              	 
      	
                
                  Rusco
      33-23

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  23

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  8/21/2007

                

              	 
      	
                
                  COL00024.000

                

              	 
      	
                
                  Theodore
      G. Magnuson

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/15/2007

                

              	 
      	 
      	 
      	
                
                  3460316

                

              

      

    

    

      
        
           

        

        
          Page 4 of
6

          
            

          

        

        
           

        

      

    

     

    
      	 	
              Exhibit "A"
    

            	
              Weld County,
      Colorado

            

    

    Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

    

    
      
        	
                
                  WELL
      #

                

              	 
      	
                
                  WELL
      NAME

                

              	 
      	
                
                  WORKING
      INT.

                

              	 
      	
                
                  TWP

                

              	 
      	
                
                  RNG

                

              	 
      	
                
                  SEC

                

              	 
      	
                
                  Q/Q

                

              	 
      	
                
                  Spud
      Date

                

              	 
      	
                
                  PDC
      Lease Number

                

              	 
      	
                
                  Lessor

                

              	 
      	
                
                  Lessee

                

              	 
      	
                
                  Lease
      Date

                

              	 
      	
                
                  Book

                

              	 
      	
                
                  Rec

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00739.000

                

              	 
      	
                
                  Rusco
      Land & Cattle, LLC

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/29/2006

                

              	 
      	 
      	 
      	
                
                  3371856

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  07206

                

              	 
      	
                
                  Rusco
      44-23

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  23

                

              	 
      	
                
                  SESE

                

              	 
      	
                
                  8/26/2007

                

              	 
      	
                
                  COL00024.000

                

              	 
      	
                
                  Theodore
      G. Magnuson

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/15/2007

                

              	 
      	 
      	 
      	
                
                  3460316

                

              
	
                
                  07205

                

              	 
      	
                
                  Rusco
      43-23

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  23

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  8/31/2007

                

              	 
      	
                
                  COL00739.000

                

              	 
      	
                
                  Rusco
      Land & Cattle, LLC

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/29/2006

                

              	 
      	 
      	 
      	
                
                  3371856

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  71008

                

              	 
      	
                
                  Tracy
      31-23

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  23

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  10/23/2007

                

              	 
      	
                
                  TBD

                

              	 
      	
                
                  Steven
      A. Tracy and Cheryl A. Tracy

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/29/2006

                

              	 
      	 
      	 
      	
                
                  3371857

                

              
	
                
                  71009

                

              	 
      	
                
                  Tracy
      32-23

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  23

                

              	 
      	
                
                  SWNE

                

              	 
      	
                
                  10/28/2007

                

              	 
      	
                
                  COL00739.000

                

              	 
      	
                
                  Rusco
      Land & Cattle, LLC

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/29/2006

                

              	 
      	 
      	 
      	
                
                  3371856

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08071

                

              	 
      	
                
                  Rotharmel
      33A

                

              	 
      	
                
                  0.739332801

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  2/24/2008

                

              	 
      	
                
                  COL00745.000

                

              	 
      	
                
                  Donald
      L Rotharmel and Joan E. Rotharmel, Husband and Wife

                

              	 
      	
                
                  D.
      L. Percell

                

              	 
      	
                
                  6/6/1980

                

              	 
      	
                
                  909

                

              	 
      	
                
                  1830787

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Charles
      F. Brett, Jr. and Jeanette

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00389.000

                

              	 
      	
                
                  Corrigan-Brett,
      husband and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/6/2007

                

              	 
      	 
      	 
      	
                
                  3534047

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Charles
      F. Brett, Jr. and Jeanette

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  71010

                

              	 
      	
                
                  Rotharmel
      11-33

                

              	 
      	
                
                  0.745781

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  NWNW

                

              	 
      	
                
                  12/30/2007

                

              	 
      	
                
                  COL00389.000

                

              	 
      	
                
                  Corrigan-Brett,
      husband and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/6/2007

                

              	 
      	 
      	 
      	
                
                  3534047

                

              
	
                
                  08033

                

              	 
      	
                
                  Rotharmel
      12-33

                

              	 
      	
                
                  0.745781

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  65W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SWNW

                

              	 
      	
                
                  1/4/2008

                

              	 
      	
                
                  COL00745.000

                

              	 
      	
                
                  Donald
      L. Rotharmel and Joan E. Rotharmel, Husband and Wife

                

              	 
      	
                
                  D.
      L. Percell

                

              	 
      	
                
                  6/6/1980

                

              	 
      	
                
                  909

                

              	 
      	
                
                  1830787

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08034

                

              	 
      	
                
                  Rotharmel
      22-33

                

              	 
      	
                
                  0.7328326

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  65W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SENW

                

              	 
      	
                
                  1/10/2008

                

              	 
      	
                
                  COL00745.000

                

              	 
      	
                
                  Donald
      L. Rotharmel and Joan E. Rotharmel, Husband and Wife

                

              	 
      	
                
                  D.
      L. Percell

                

              	 
      	
                
                  6/6/1980

                

              	 
      	
                
                  909

                

              	 
      	
                
                  1830787

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Sandra
      Brown Lustig, individually aka

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      

      

       

      
        
          
          

        

        
          Page 5 of
6

          
            

          

        

        
          
          

        

      

       

      
        	
              	
                Exhibit "A"
    

              	
                Weld County,
      Colorado

              

        Attached
to and made part of that Assignment of Working Interest dated August 21, 2007 by
and between Petroleum Development Corporation and Rockies Region 2007 Limited
Partnership

        

        
          
            	
                    
                      WELL
      #

                    

                  	 
      	
                    
                      WELL
      NAME

                    

                  	 
      	
                    
                      WORKING
      INT.

                    

                  	 
      	
                    
                      TWP

                    

                  	 
      	
                    
                      RNG

                    

                  	 
      	
                    
                      SEC

                    

                  	 
      	
                    
                      Q/Q

                    

                  	 
      	
                    
                      Spud
      Date

                    

                  	 
      	
                    
                      PDC
      Lease Number

                    

                  	 
      	
                    
                      Lessor

                    

                  	 
      	
                    
                      Lessee

                    

                  	 
      	
                    
                      Lease
      Date

                    

                  	 
      	
                    
                      Book

                    

                  	 
      	
                    
                      Rec

                    

                  

          

        

      

      
        	
                
                  08070

                

              	 
      	
                
                  Telarico
      33C

                

              	 
      	
                
                  0
      99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  1/20/2007

                

              	 
      	
                
                  COL00076.001

                

              	 
      	
                
                  E.
      Sandra Lustig

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3362285

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08068

                

              	 
      	
                
                  Telarico
      31-33

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  NWNE

                

              	 
      	
                
                  1/15/2008

                

              	 
      	
                
                  COL00076.002

                

              	 
      	
                
                  Robyn
      Tsesarsky, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3371854

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08069

                

              	 
      	
                
                  Hollister
      32-33

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SWNE

                

              	 
      	
                
                  1/25/2008

                

              	 
      	
                
                  COL00076.003

                

              	 
      	
                
                  Shauna
      Jacobson, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3379952

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  J.
      Gale Moody, with executor rights and

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08095

                

              	 
      	
                
                  Hall
      42-33

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  SENE

                

              	 
      	
                
                  1/30/2008

                

              	 
      	
                
                  COL00076.004

                

              	 
      	
                
                  individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3379959

                

              
	
                
                  08072

                

              	 
      	
                
                  Tolmachoff
      41-33

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  33

                

              	 
      	
                
                  NENE

                

              	 
      	
                
                  2/19/2008

                

              	 
      	
                
                  COL00076.005

                

              	 
      	
                
                  Alex
      Brown, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3377833

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00076.006

                

              	 
      	
                
                  David
      L. Brown, individually

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/13/2005

                

              	 
      	 
      	 
      	
                
                  3377832

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Zolman
      E. Brown Trust, Created under the

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Zolman
      E. Brown Revocable Trust dated

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00076.007

                

              	 
      	
                
                  December
      19, 1970

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  1/25/2007

                

              	 
      	 
      	 
      	
                
                  3462989

                

              
	
                
                  08076

                

              	 
      	
                
                  Anderson
      43-34

                

              	 
      	
                
                  0.99681057

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  NESE

                

              	 
      	
                
                  3/12/2008

                

              	 
      	
                
                  COL00028.000

                

              	 
      	
                
                  Don
      Anderson Inc., a Colorado Corp.

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  11/27/2005

                

              	 
      	 
      	 
      	
                
                  3354265

                

              
	
                
                  08432

                

              	 
      	
                
                  Anderson
      34B

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  SESW

                

              	 
      	
                
                  3/19/2008

                

              	 
      	
                
                  COL00026.001

                

              	 
      	
                
                  Colleen
      G. Rossman

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/17/2005

                

              	 
      	 
      	 
      	
                
                  3362282

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  Richard
      E. Mulhern, Jr., and Elizabeth

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00026.002

                

              	 
      	
                
                  Mulhern,
      husband and wife

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  12/17/2005

                

              	 
      	 
      	 
      	
                
                  3371850

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                
                  COL00028.000

                

              	 
      	
                
                  Don
      Anderson Inc., a Colorado Corp.

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  11/27/2005

                

              	 
      	 
      	 
      	
                
                  3354265

                

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                
                  08075

                

              	 
      	
                
                  Anderson
      34-34

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  SWSE

                

              	 
      	
                
                  3/30/2008

                

              	 
      	
                
                  COL00028.000

                

              	 
      	
                
                  Don
      Anderson Inc., a Colorado Corp.

                

              	 
      	
                
                  Petroleum
      Development Corporation

                

              	 
      	
                
                  11/27/2005

                

              	 
      	 
      	 
      	
                
                  3354265

                

              
	
                
                  08074

                

              	 
      	
                
                  Anderson
      33-34

                

              	 
      	
                
                  0.99981000

                

              	 
      	
                
                  7N

                

              	 
      	
                
                  66W

                

              	 
      	
                
                  34

                

              	 
      	
                
                  NWSE

                

              	 
      	
                
                  3/24/2008

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      

      

    

    

    
      
Page 6 of
6ex10_2.htm

    
      

    

    Exhibit
10.2

     

    Form
of Drilling and Operating Agreement

     

    This
Agreement is entered into by and between ROCKIES REGION 2007 LIMITED PARTNERSHIP, a West Virginia
limited partnership, hereinafter designated and referred to as the
"Partnership," and Petroleum Development Corporation, hereinafter referred to
and designated as "PDC."

     

    Whereas,
the parties to this Agreement desire to enter into an agreement to explore and
develop certain Prospects for the production of oil and gas as hereinafter
provided,

     

    It is
agreed as follows:

     

    ARTICLE
I

    DEFINITIONS

     

    As used
in this Agreement, the following words and terms shall be defined as
follows:

     

    
      A.     
The
term "oil and gas" shall mean oil, natural gas, casing head gas, gas condensate,
and all other liquid or gaseous hydrocarbons and other marketable substances
produced therewith, unless an intent to limit the inclusiveness of this term is
specifically stated.

    

     

    
      B.      
The
term "Prospect" shall be deemed to consist of the drilling or spacing unit on
which the well will be drilled by the Partnership which is the minimum area
permitted by state law or local practice on which one well may be
drilled.

    

     

    
      C.      
"Royalty"
shall mean a fractional undivided interest in the production of oil and gas
wells, or the proceeds therefrom to be received free and clear of all costs of
development, operations or maintenance.

    

     

    
      D.      "Overriding
royalty" shall mean an interest in the oil and gas produced under a specified
oil and gas lease or leases, or the proceeds from the sale thereof, carved out
of the working interest, to be received free and clear of all costs of
development, operation, or maintenance.

    

     

    
      E.      
"Proportionate
Working Interest" shall mean an interest in a well or Prospect of less than 100%
which bears that same percentage of costs of development and production as it
receives in production revenues after deducting for royalty and overriding
royalties.

    

     

    
      F.     
 "Non-operators"
shall mean all parties holding a proportionate working interest in a Prospect,
including the Additional General Partners and the Limited Partners, but
excluding PDC if it is also serving as Operator.

    

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

    ARTICLE
II

    EXHIBITS

     

    The
following exhibits are incorporated in and made a part of this
Agreement:

     

    
      	
            	
              A.

            	
              Exhibit
      "A," Prospects.

            

    

     

    
      	
              
              

            	
              1.

            	
              Identification
      of each Prospect to be drilled.

            

    

     

    
      	
            	
              2.

            	
              Target
      formation.

            

    

     

    
      	
            	
              3.

            	
              The
      Partnership fractional interest
therein.

            

    

    

    
      	
            	
              B.

            	
              Exhibit
      "B," Insurance.

            

    

     

    
      	
            	
              C.

            	
              Exhibit
      "C," Additional Prospects.

            

    

     

    
      
        1.         
Identification
of additional Prospects added or substituted after the original date of this
Agreement, and if substituted, identification of the Prospect which is
replaced.

      

    

     

    
      	
            	
              2. 

            	
              Target
      formation.

            

    

     

    
      	
            	
              3. 

            	
              The
      Partnership fractional interest
therein.

            

    

     

    
      	
            	
              4. 

            	
              Approval
      by the Partnership and PDC.

            

    

    

    ARTICLE
III

    OPERATOR

     

    
      	
            	
              A.

            	
              Designation
      and Responsibilities of Operator:

            

    

     

    PDC shall
be the Operator of the Prospects, and shall conduct and direct and have full
control of all operations on the Prospects as permitted and required by, and
within the limits of this Agreement. It shall conduct all such operations in a
good workmanlike manner, but it shall have no liability as Operator to the
Partnership for losses sustained or liabilities incurred, except such as may
result from negligence or misconduct.  The Managing General Partner
may subcontract with another operator or operators to perform some of all of the
duties of the operator, on Terms and conditions substantially the same as those
discussed herein.  The Managing General Partner will supervise
operations by other non-affiliated drilling contractors and
subcontractors.

     

    
      	
            	
              B.

            	
              Resignation
      or Removal of Operator and Selection of
  Successor:

            

    

     

    1.     
   Resignation or Removal of Operator:  PDC may resign as
Operator at any time by giving written notice thereof to the
Partnership.  If PDC terminates its legal existence, no longer owns an
interest in the Prospects, has filed a petition under the Federal bankruptcy
laws or any state insolvency law or a receiver, fiscal agent, or similar officer
has been appointed by a court for the business or property of PDC, or is
otherwise no longer capable of serving as Operator, PDC shall be deemed to have
resigned without any action by the Partnership, except the selection of a
successor.  PDC may be removed by the affirmative vote of
Non-Operators owning a majority working interest in each Prospect after
excluding the voting interest of Operator. Such resignation or removal shall not
become effective until 7:00 o'clock A.M., Eastern time, on the first day of
calendar month following the expiration of ninety (90) days after the giving of
notice of resignation of PDC or action by the Non-Operators to remove PDC as
Operator, unless a successor Operator has been selected and assumes the duties
of PDC at an earlier date.  PDC, after effective date of resignation
or removal, shall be bound by the terms hereof as a Non-Operator.  A
change of a corporate name or structure of PDC or transfer of PDC's interest to
any single subsidiary, parent or successor corporation shall not be the basis
for removal of PDC as Operator.

     

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

    

    2.        
Selection of Successor Operator: Upon the resignation or removal of PDC, a
successor Operator shall be selected by the parties.  The successor
Operator shall be selected by the affirmative vote of parties owning a majority
working interest in each Prospect; provided, however, if an Operator which has
been removed fails to vote or votes only to succeed itself, the successor
Operator shall be selected by the affirmative vote of parties owning a majority
interest after excluding the voting interest of the Operator that was
removed.

    

    
      	
            	
              C.

            	
              Employees:

            

    

     

    The
number of employees used by PDC in conducting operations hereunder, their
selection, and the hours of labor and the compensation for services performed
shall be determined by PDC.

     

    ARTICLE
IV

    DRILLING
PROSPECTS

    

    
      	
            	
              A.

            	
              Prospects:

            

    

     

    Exhibit
"A" lists Prospects initially to be acquired by the Partnership, and its
proportionate working interest in each Prospect.  Most wells to be
drilled by the Partnerships will be offsets to, or located nearby, producing
wells.  The Partnership will be assigned single well drilling or
spacing units or portions thereof for prospects located on PDC's Puckett or
Chevron acreage in Garfield County, Colorado or on acreage in PDC's Nesson or
Bakken Project acreage in North Dakota or on development prospects located in
the Greater Wattenberg Field Area.  If an exploratory well is drilled
on PDC's acreage in the above areas, and the well proves up reserves on the
immediately adjacent spacing or drilling units, if PDC owns an interest in the
adjacent units, PDC will assign the Partnership an interest equivalent to that
owned in the exploratory well, proportionately reduced if PDC owns less than a
100% interest in the adjacent spacing units.

     

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

     

    
      	
            	
               B.

            	
              Cost:

            

    

     

    The
Partnership shall reimburse PDC for its proportionate share of the lesser
of:

     

    
      	
            	
              1.

            	
              The
      fair market value of the Prospect,
or

            

    

     

    
      2.      
  The
"Cost" of acquisition of the Prospect including: (a) the price paid by PDC for
such property; (b) title examination, abstracting, brokers commissions, filing
fees, recording costs, transfer taxes, and other charges incurred in connection
with the acquisition of the property; (c) bonuses, rentals and ad valorem taxes
paid by PDC with respect to the Prospect to the date of its transfer to the
Partnership, interest on funds used to acquire or maintain such property, and
such portion of PDC's expenses for geological, drafting, accounting, legal and
other like services allocated to the Prospect in accordance with generally
accepted accounting principles, not including for expenses incurred in the prior
drilling of wells, and provided such expenses shall have been incurred not more
than 36 months prior to the purchase by the program.

    

    

    
      	
            	
              C.

            	
              Substitution:

            

    

     

    As
drilling progresses other, more desirable Prospects may become may become less
desirable as a result of additional information not available as of the date of
this Agreement.  For any undrilled Prospect, the Partnership may
request that PDC substitute another Prospect, in which case the entire
acquisition cost paid for the Prospect or a substitute thereof will be applied
against the cost of the substituted Prospect, and against other costs of this
contract if and to the extent the cost of the substitute Prospect is less than
the cost of the original Prospect it replaces.  An amendment to this
Agreement in the form of Exhibit "C" shall be used for the addition or
substitution of a Prospect.

     

    
      	
            	
              D.

            	
              Title
      Examination and Opinion:

            

    

     

    Title
examination shall be made by outside attorneys on the drillsite of any proposed
well prior to commencement of drilling operations.  The opinion will
include ownership of the working interest, mineral, royalty, overriding royalty,
and production payments under the applicable leases. A copy of the opinion will
be furnished to the Partnership.

     

    PDC shall
take such steps as are necessary in its best judgment to render title to the
leases assigned to the Partnership acceptable for the purposes of the
Partnership.  No operation shall be commenced on leases acquired by
the Partnership unless the Partnership Manager is satisfied that necessary title
requirements have been satisfied by PDC and that the undertaking of such
operation would be in the interest of the Partnership.  PDC shall be
free, however, to use its own best judgment in waiving title requirements and
shall not be liable to the Partnership, or Participants for any mistakes of
judgment; nor shall PDC be deemed to be making any warranties or
representations, express or implied, as to the validity or merchantability of
the title to any lease assigned to the Partnership or the extent of the interest
covered thereby.

     

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

    

    ARTICLE
V

    INTEREST
IN COSTS AND PRODUCTION

     

    
      	
            	
              A.

            	
              Royalties
      and Overriding Royalties:

            

    

     

    The
Partnership interest in production from drilling Prospects will be subject to
the payment to non-affiliated parties of royalties and overriding royalties,
provided the weighted average of all royalties for all Partnership Prospects
drilled shall not exceed 25% gross revenues. No such royalty or overriding
royalty will be paid to PDC or its affiliates.

     

    
      	
            	
              B.

            	
              Proportionate
      Working Interest:

            

    

     

    The
Partnership may acquire 100% of the working interest in a Prospect or a
proportionate interest of less than 100%.  If the Partnership acquires
a proportionate interest, the respective obligations and benefits acquired by
the Partnership will be proportionately the same as the working interest
acquired. PDC and its affiliates may not retain any overrides or other burdens
on the interest conveyed to the Partnership.  The Partnership will pay
a proportionate share of the total of lease, development, and operating costs,
and will be entitled to receive a proportionate share of production subject only
to royalties and overriding royalties discussed in Article V, § A.

     

    
      	
            	
              C.

            	
              Joint
      Venture Activities:

            

    

     

    PDC may
retain an interest or convey interests in undrilled Prospects to other Joint
Venturers, retaining for its own account a profit or promotional interest on the
interest conveyed. PDC shall require any party acquiring such an interest to
acquire a proportionate working interest and to assume and bear alone all
obligation associated with such an interest, and to bear alone and hold the
Partnership and other Joint Venturers harmless from all costs, claims, and
burdens associated with the interest acquired.  At the discretion of
the Managing General Partner, the Partnership may enter into joint ventures
which allow a functional allocation of tangible, intangible and lease costs,
where each joint venturer is responsible for its overhead costs, provided the
Partnership's interest in the revenues and income of such a joint venture is
proportional to its contribution to the total cost of such venture.

     

    
      	
            	
              D.

            	
              Adjustments:

            

    

     

    Payment
of any bill shall not prejudice the right of the Partnership to protest or
question the correctness thereof:  provided, however, all bills and
statements rendered to the Partnership by PDC during any calendar year shall
conclusively be presumed to be true and correct after a twenty-four (24) month
period unless the Partnership takes written exception thereto and makes claim on
PDC for adjustment.  No adjustment favorable to PDC shall be made
unless it is made within the same prescribed period.  The provisions
of this paragraph shall not prevent adjustments resulting from a physical
inventory of controllable material.

     

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

     

    
      	
            	
               E.

            	
              Audits:

            

    

     

    The
Partnership, upon notice in writing to PDC and all other Non-Operators, shall
have the right to audit PDC's accounts and records relating to the Partnership
wells for any calendar year within the twenty-four (24) month period following
the end of the calendar year to be audited; provided, however the making of an
audit shall not extend the time for the taking of written exception to and the
adjustments of account.  Where there are two or more Non-Operators,
the Non-Operators shall make every reasonable effort to conduct a joint audit in
a manner which will result in a minimum of inconvenience to PDC.  PDC
shall bear no portion of the Non-Operators audit cost incurred under this
paragraph unless agreed to by PDC.  The audits shall not be conducted
more than once each year without prior approval of PDC, except upon the
resignation or removal of PDC as operator, and shall be made at the expense of
those Non-Operators requesting such audit.

     

    PDC shall
reply in writing to an audit report within 75 days after receipt of such
report.

     

    ARTICLE
VI

    DRILLING
AND DEVELOPMENT

     

    
      	
            	
              A.

            	
              Agreement
      To Drill and Complete:

            

    

     

    PDC shall
commence drilling of a well or wells on each Prospect following the initial
formation and funding of the Partnership, but in no case later than March 30,
2008 and shall continue drilling thereafter with due diligence to the Target
formation unless a condition which renders further drilling impractical is
encountered at a lesser depth, or unless the Partnership agrees to complete or
abandon the well at a lesser depth.

     

    PDC shall
make reasonable tests of all formations encountered during drilling which give
indication of containing economic quantities of oil and/or gas.  If
such tests indicate the presence of economic quantities of oil and/or gas, PDC
shall complete the well and install such surface and well equipment, gathering
pipelines, heaters, separators, etc., as are necessary and normal in the area in
which the Prospect is located.  If it is determined that the well is
not likely to produce oil and/or gas in commercial quantities PDC shall plug and
abandon the well in accordance with applicable regulations.

     

    
      	
            	
              B.

            	
              Cost
      of Drilling and Completion:

            

    

     

    The
Partnership shall bear its proportionate share of the cost of drilling and
completing or drilling and abandoning each Partnership well, where the Managing
General Partner serves as operator as follows:

     

    
      1.         The Cost
of the Prospect, as defined;

    

     

    2.         The
intangible costs of drilling and completing the well, including the Managing
General Partner's compensation for acting as operator, equal to 12.6% of the
total direct well cost if the investor partners' interest in the well is 63%,
and proportionally reduced if the tangible costs exceed 37% of the direct well
costs on average for the Partnership's wells, so that the Managing General
Partner's contribution to and interest in the Partnership is increased above
37%; and

     

    
      
        
        

      

      
        6

        
          

        

      

      
        
        

      

    

     

    3.       
The tangible Costs of drilling and completing the Partnership wells and of
gathering pipelines necessary to connect the well to the nearest appropriate
sales point or delivery point.

     

    If the
Partnership acquires less than 100% of a Prospect, its Drilling and Completion
Costs of that Prospect will proportionately decrease.

     

    Intangible
drilling costs will include a monthly drilling well fixed overhead based on the
most recently published Ernst & Young fixed rate overhead
survey.  The rate will be determined by state and well
depth.

     

    In
addition, the Managing General Partner may also provide direct services in the
drilling and completion of the wells, including land and legal services,
roustabout and construction services, supervision of drilling and completion
operations, engineering and geological services, and other
services.  Such services will be provided at the Managing General
Partner's cost determined in accordance with generally accepted accounting
principles and subject to written agreements.

     

    If the
foregoing rates for direct services exceed competitive rates available from
other nonaffiliated persons in the area engaged in the business of rendering or
providing comparable services or equipment, the foregoing rates will adjust to
an amount equal to that competitive rate.

     

    
      	
            	
              C.

            	
              Completion
      By Less Than All Parties:

            

    

     

    If not
all Participants in a well wish to participate in a completion attempt, the
parties desiring to do so may pay all costs of the completion attempt including
the cost of necessary well equipment and a gathering pipeline, and such parties
shall receive all income and pay all operating costs from the well until they
have received an amount equal to 300% of the completion and connection costs,
after which time the non-consenting parties shall have the right to receive
their original interest in further revenues and expenses.

     

    
      	
            	
              D.

            	
              Prepayment:

            

    

     

    The
Partnership agrees to pay PDC the full cost of all planned Prospects prior to
December 31, 2007 in order to assure the Partnership of the rates quoted in
Article VI, § B, to arrange for the drilling equipment for the wells through
subcontractors and to provide PDC with working capital for the drilling of the
wells.

     

    
      
        
        

      

      
        7

        
          

        

      

      
        
        

      

    

     

    
      	
            	
               E.

            	
              Refunds:

            

    

     

    In no
event shall PDC be obligated to refund any moneys paid to it by the Partnership
under this Agreement.  If any amounts paid under Article VI, § D
exceed costs due under Article VI, § B, such excess shall be credited to the
Partnership and shall be expended for additional drilling.

     

    ARTICLE
VII

    PRODUCTION
AND SUBSEQUENT OPERATIONS

     

    
      	
            	
              A.

            	
              Commencement
      of Production:

            

    

     

    For
purposes of this Agreement, production will commence:

     

    
      
        	
              	
                1. 

              	
                In
      the case of gas wells, when gas is first delivered from the well through a
      pipeline or other delivery system to a
  purchaser;

              

      

    

     

    
      	
            	
              2. 

            	
              In
      the case of oil wells, when the well has produced 100 barrels;
      or

            

    

     

    
      	
            	
              3. 

            	
              In
      the case of combination wells, when either of criteria have been
      satisfied.

            

    

    

    A well
will be deemed to be "in production" in any month thereafter in which oil or gas
are produced in commercial quantities.

     

    
      	
            	
              B.

            	
              Production
      Operations:

            

    

     

    PDC shall
provide all necessary labor, vehicles, supervision, management, accounting, and
overhead services for normal production operations, and lease accounting, and
shall be entitled to deduct from Partnership revenues a monthly well-tending fee
of $400 per Wattenberg Field well, $700 per Piceance Basin, $950 for Red Desert
Basin or Williston Basin well and a monthly operating charge of $100 per
well.  If the Partnership has producing wells in areas different from
those above, the operator will charge a monthly Partnership Administration fee
of $100 per well plus a competitive industry rate for operations and field
supervision.  Nonroutine operations will be billed to the Partnership
at their proportionate cost.  Any nonroutine operation with an
estimated cost exceeding $10,000 will be authorized for expenditure ("AFE" or
"AFE'd") and submitted to the Non-Operators for approval.  Approval of
a majority of the working interest owners will be required to authorize such
operations. If the Partnership authorized such operations, PDC shall have the
right to deduct payment for the cost from Partnership revenues.

     

    
      	
            	
              C.

            	
              Abandonment
      of Wells That Have Produced:

            

    

     

    Any well
which has been completed as a producer shall not be plugged and abandoned
without the consent of all Non-Operators.  If all parties consent to
such abandonment, the well shall be plugged and abandoned in accordance with
applicable regulations and at the cost, risk of expense of all owners. If,
within (30) days after receipt of the notice of the proposed abandonment of any
well, all parties do not agree to the abandonment of such well, those wishing to
continue its operations from the interval(s) of the formation(s) then open to
production shall tender to each of the other parties its proportionate share of
the value of the well's salvageable material and equipment, less the estimated
cost of salvaging and assign the non-abandoning parties, without warranty,
express or implied, as to title or as to quantity, or fitness for use of the
equipment and material, all of its interest in the well and related equipment,
together with its interest in leasehold estate as to, but only as to, the
interval or intervals of the formation or formations then open to
production.

     

    
      
        
        

      

      
        8

        
          

        

      

      
        
        

      

    

     

    
      	
            	
              D.

            	
              Marketing
      of Production:

            

    

     

    The
Partnership shall have the right to take in kind and separately dispose of its
share of all oil and gas produced from the Prospects, excluding its
proportionate share of production required for lease operations and production
unavoidably lost.  Initially the Partnership designates PDC as its
agent to market such production and authorizes PDC to enter into and bind the
Partnership in such agreements as it deems in the best interest of the
Partnership for the sale of such oil and/or gas. The Partnership may rescind the
designation of PDC as its agent with regard to all subsequent marketing
agreements by written notice at any time, but agrees to be bound by such
agreements as may then be in effect during their terms.  The
Partnership shall bear its proportionate share of all marketing costs, if
any.  If PDC provides marketing services, its charge shall be no
greater than those charges made by unaffiliated marketers.  If
pipelines which have been built by PDC are used in the delivery of natural gas
to market, PDC may charge a gathering fee not to exceed that which would be
charged by a nonaffiliated third party for a similar service.

     

    
      	
            	
              E.

            	
              Escalation
      in the Event of Rising Costs:

            

    

     

    The
production and accounting charges provided in Article VII, § B, may be adjusted
annually beginning January 1, 2009, to an amount equal to the rates from Article
VII, § B, multiplied by the average of the then current Oil and Gas Extraction
Index and the Professional and Technical Services Index, , as published by the
United States Department of Labor, Bureau of Labor Statistics, provided that the
charge may not exceed the rate which would be charged by other comparable
operators in the area of operations.  This average is commonly
referred to as the Accounting Procedure Wage Index Adjustment which is published
annually by the Council of Petroleum Accountants Societies.

     

    ARTICLE
VIII

    LIABILITY
OF PARTIES

    

    
      	
            	
              A.

            	
              Liability
      of Parties:

            

    

     

    If the
Partnership participates in a well with third parties, the liability of the
parties shall be several, not joint or collective.  The Partnership
shall be responsible only for its obligations, and shall be liable only for its
proportionate share of the costs of developing and operating the
Prospects.  It is not the intention of the parties to create, nor
shall this Agreement be construed as creating, a mining or other partnership or
association, or to render the parties liable as partners.

     

    
      
        
        

      

      
        9

        
          

        

      

      
        
        

      

    

     

    
      	
            	
               B.

            	
              Liens
      and Payment Defaults:

            

    

     

    The
Partnership grants to PDC a lien upon its oil and gas rights in the Contract
Area, and a security interest in its share of oil and/or gas when extracted and
its interest in all equipment, to secure payment of its share of expense,
together with interest thereon.  If PDC has a security interest under
the Uniform Commercial Code of the state, PDC shall be entitled  to
exercise the rights and remedies of a secured party under the
Code.  The bringing of a suit and the obtaining of judgment by PDC for
the secured indebtedness shall not be deemed an election of remedies or
otherwise affect the lien rights or security interest as security for the
payment thereof. In addition, upon default by the Partnership in the payment of
its share of expense, PDC shall have the right, without prejudice to other
rights or remedies, to collect from the purchaser the proceeds from the sale of
the Partnership's share of oil and/or gas until the amount owed by the
Partnership, plus interest, has been paid. Each purchaser shall be entitled to
rely upon PDC's written statement concerning the amount of any
default.  PDC grants a like lien and security interest to the
Partnership to secure payment of PDC's proportionate share of
expenses.

     

    If any
party fails or is unable to pay its share of expense within sixty (60) days
after rendition of a statement therefor by PDC, PDC shall pay the unpaid amount
in the proportion that the interest of each such party bears to the interest of
all such parties.

     

    
      	
            	
              C.

            	
              Payments
      and Accounting:

            

    

     

    Except as
herein otherwise specifically provided, PDC shall promptly pay and discharge
expenses incurred in the development and  operation of the Contract
Area pursuant to this Agreement.  PDC shall keep an accurate record of
the account hereunder, showing expenses incurred and charges and credits made
and received.

     

    Regardless
of which party has contributed the lease(s) and/or oil and gas interest(s)
hereto on which royalty is due and payable, PDC shall pay or deliver or cause to
be paid or delivered the royalty and overriding royalty payments due under the
terms associated with the acquisition of each Prospect, and shall deduct such
payments from the revenue of the Partnership.

     

    
      	
            	
              D.

            	
              Taxes:

            

    

     

    Unless
the Partnership elects to take production in kind, PDC shall pay or cause to be
paid all production, severance, excise, gathering and other taxes imposed upon
or with respect to the production or handling of such party's share of oil
and/or gas produced under the terms of this Agreement, and shall be entitled to
reimbursement for such taxes from partnership revenue.

     

    
      	
            	
              E.

            	
              Insurance:

            

    

     

    At all
times while operations are conducted hereunder, PDC shall comply with the
workmen's compensation laws of the state of West Virginia and in each state
where the Partnership is conducting drilling and production
operations.  PDC shall also carry or provide insurance as outlined in
Exhibit "B," attached to and made a part hereof.  PDC shall require
all contractors engaged in work on or for the Contract Area to comply with the
workmen's compensation law of the state where the operations are being conducted
and to maintain such other insurance as PDC may require.

     

    
      
        
        

      

      
        10

        
          

        

      

      
        
        

      

    

     

    No
additional charge will be made for such insurance during drilling and completion
operations. When wells have been placed in production PDC may bill for the cost
of providing such insurance, allocated among wells and operations in accordance
with generally accepted accounting principles.

     

    ARTICLE
IX

    INTERNAL
REVENUE CODE ELECTION

     

    This
Agreement is not intended to create, and shall not be construed to create, a
relationship of partnership or an association for profit between or among the
parties hereto. Notwithstanding any provision herein that the rights and
liabilities hereunder are several and not joint or collective, or that this
agreement and operations hereunder shall not  constitute a
partnership, if, for federal income tax purposes, this Agreement and the
operations hereunder are regarded as a partnership, each party hereby affected
elects to be excluded from the application of all of the provisions of
Subchapter "K," Chapter 1, Subtitle "A" of the Internal Revenue Code of 1986, as
amended (the "Code") as permitted and authorized by Code Section 761 and the
regulations promulgated thereunder. PDC is authorized and directed to execute on
behalf of the Partnership such evidence of this election as may be required by
the Secretary of the Treasury of the United States or the Federal Internal
Revenue Service, including specifically, but not by way of limitation, all of
the returns, statements, and the data required by Regulations
1.761.  Should there be any requirement that each party hereby
affected to give further evidence of this election, each such party shall
execute such documents and furnish such other evidence as may be required by the
Federal Internal Revenue Service or as may be necessary to evidence this
election.  No such party shall give any notices or take any other
action inconsistent with the election made hereby.  If any present or
future income tax laws of the state or states in which the Contract Area is
located or any future income tax laws of the United States contain provisions
similar to those in Subchapter "K," Chapter l, Subtitle "A," of the Code, under
which an election similar to that provided by Section 761 of the Code is
permitted, each party hereby affected shall make such election as may be
permitted or required by such laws.  In making the foregoing election,
each such party states that the income derived by such party from operations
hereunder can be adequately determined without the computation of partnership
taxable income.

     

    ARTICLE
X

    CLAIMS
AND LAWSUITS

     

    PDC may
settle any single uninsured third party damage claim or suit arising from
operations hereunder if the expenditure does not exceed One Thousand Dollars
($1,000.00) and if the payment is in complete settlement of such claim or
suit.  If the amount required for settlement exceeds the above amount,
the Partnership shall assume and take over the further handling of its interest
in the claim suit, unless such authority is delegated to PDC.  All
costs and expenses of handling, settling, or otherwise discharging such claim or
suit shall be at the joint expenses of the parties participating in the
operation from which the claim or suit arises.  If a claim is made
against any party or if any party is sued on account of any matter arising from
operations hereunder over which such individual has no control because of the
rights given Operator by this Agreement, such party shall immediately notify all
other parties, and the claim or suit shall be treated as any other claim or suit
involving operations hereunder all claims and suits involving title to any
interest subject to this Agreement shall be treated as a claim or suit against
all parties participating in the Prospect so affected.

     

    
      
        
        

      

      
        11

        
          

        

      

      
        
        

      

    

     

    ARTICLE
XI

    FORCE
MAJEURE

     

    If either
party is rendered unable, wholly or in part, by force majeure to carry out its
obligations under this Agreement, other than the obligation to make money
payments, that party shall give to the other party prompt written notice of the
force majeure with reasonably full particulars concerning its inability;
thereupon, the obligations of the party giving the notice, so far as they are
affected by the force majeure, shall be suspended during, but no longer than,
the continuance of the force majeure.  The affected party shall use
all reasonable diligence to remove the force majeure situation as quickly as
practicable.

     

    The
requirement that any force majeure shall be remedied with all reasonable
dispatch shall not require the settlement of strikes, lockouts, or other labor
difficulty by the party involved, contrary to its wishes; how all such
difficulties shall be handled shall be entirely within the discretion of the
party concerned.

     

    The term
"force majeure," as here employed, shall mean act of God, strike, lockout, or
other industrial disturbance act of the public enemy, war, blockade, public
riot, lightning, fire, storm, flood, explosion, governmental action,
governmental delay, restraint or inaction, unavailability of equipment or market
for oil and/or gas, and any other cause, whether of the kind specifically
enumerated above or otherwise, which is not reasonably within the control of the
party claiming suspension.

     

    ARTICLE
XII

    NOTICES

     

    All
notices required by this Agreement shall be given in writing addressed to the
parties as follows:

     

    
      	
            	
              1 

            	
              For
      the Partnership:

            

    

     

    Petroleum Development Corporation, Managing General Partner of
Rockies Region 2007 Limited Partnership, P.O. Box 26 Bridgeport, WV 26330

     

    
      	
            	
              2 

            	
              For
      PDC:

            

    

     

    Petroleum
Development Corporation, P.O. Box 26, Bridgeport, WV 26330

     

    Each
party shall have the right to change its address at any time, by giving written
notice to all other parties.

     

    
      
        
        

      

      
        12

        
          

        

      

      
        
        

      

    

    

    ARTICLE
XIII

    TERM OF
AGREEMENT

     

    If a well
drilled under any provision of this Agreement, results in production of oil
and/or gas in paying quantities, this Agreement shall continue in force so long
as any such well or wells produce, or are capable of production, and for an
additional period of 180 days from cessation of all production; provided,
however, if, prior to the expiration of such additional period, one or more of
the parties hereto are engaged in drilling, reworking, deepening, plugging back,
testing or attempting to complete a well or wells hereunder, this Agreement
shall continue in force until such operations have been completed; and if
production results therefrom, this Agreement shall continue in force as provided
herein.

     

    It is
agreed, however, that the termination of this Agreement shall not relieve any
party hereto from any liability which has accrued or attached prior to the date
of such termination.

     

    ARTICLE
XIV

    COMPLIANCE
WITH LAWS AND REGULATIONS

     

    
      	
            	
              A.

            	
              Laws,
      Regulations and Order:

            

    

     

    This
Agreement shall be subject to the conservation laws of the state in which the
Prospects are located, to the valid rules, regulations, and orders of any duly
constituted regulatory body of said state; and to all other applicable federal,
state, and local laws, ordinances, rules, regulations, and orders.

     

    
      	
            	
               B.

            	
              Governing
      Law:

            

    

     

    This
Agreement and all matters pertaining hereto, including, but not limited to,
matters of performance, non-performance, breach, remedies, procedures, rights,
duties and interpretation or construction, shall be governed and determined by
the law of the state in which the Prospect is located.

     

    
      	
            	
              C.

            	
              Regulatory
      Agencies:

            

    

     

    Nothing
herein contained shall grant, or be construed to grant, PDC the right or
authority to waive or release any rights, privileges, or obligations which the
Partnership may have federal or state laws or under rules, regulations or orders
promulgated under such laws in reference to oil, gas and mineral operations,
including the location, operation, or production of wells, on tracts offsetting
or adjacent to the Contract Area.

     

    With
respect to operations hereunder, the Partnership agrees to release PDC from any
and all losses, damages, injuries, claims and causes of action arising out of,
incident to or resulting directly or indirectly from Operator's interpretation
or application of rules, rulings, regulations, or orders of the Department of
Energy or predecessor or successor agencies to the extent such interpretation or
application was made in good faith.  The Partnership further agrees to
reimburse PDC for any amounts applicable to the Partnership's share of
production that PDC may be required to refund, rebate or pay as a result of such
an incorrect interpretation or application.

     

    
      
        
        

      

      
        13

        
          

        

      

      
        
        

      

    

     

    
      ARTICLE
XV 

      MISCELLANEOUS

    

    
       

      This
Agreement shall be binding upon and shall inure to the benefit of the parties
hereto and to their respective heirs, devisees, legal representative, successors
and assigns.

    

    
       

      This
Agreement may be executed in any number of counterparts, each of which shall be
considered an original for all purposes.

    

    
      

       

      IN
WITNESS WHEREOF, this Agreement shall be effective as of 12th day of June,
2007.

    

    

     

    
      	 
      	
              
                 /s/
      Darwin L. Stump

              

            	 
      
	 
      	
              
                Darwin
      L. Stump

              

            	 
      
	 
      	
              
                Chief
      Accounting Officer

              

            	 
      
	 
      	
              
                Petroleum
      Development Corporation

              

            	 
      
	 
      	 
      	 
      
	 
      	 
      	 
      
	 
      	
              
                /s/ Richard W.
      McCullough

              

            	 
      
	 
      	
              
                Richard
      W. McCullough

              

            	 
      
	 
      	
              
                Chief
      Financial Officer & Treasurer

              

            	 
      
	 
      	
              
                Petroleum
      Development Corporation

              

            	 
      
	 
      	
              
                Managing
      General Partner of

              

            	 
      
	 
      	
              
                Rockies
      Region 2007 Limited Partnership

              

            	 
      

    

     

     

     14

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