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

                

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      


      

    

    


    
      
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