FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * ANADARKO PETROLEUM CORP   2. Issuer Name and Ticker or Trading Symbol Western Gas Partners LP [WES] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1201 LAKE ROBBINS DR. 3. Date of Earliest Transaction (Month/Day/Year) 07/22/2009 (Street) THE WOODLANDS, TX 77380 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Units representing limited partner interests 07/22/2009   P   351,424 A (1) 8,633,746 (1) (2) I See footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ANADARKO PETROLEUM CORP 1201 LAKE ROBBINS DR. THE WOODLANDS, TX 77380		X
WESTERN GAS RESOURCES INC 1201 LAKE ROBBINS DR. THE WOODLANDS, TX 77380		X
WGR Holdings LLC 1201 LAKE ROBBINS DR. THE WOODLANDS, TX 77380		X

Signatures

/s/ Robert K. Reeves, Senior Vice President, General Counsel and Chief Administrative Officer of Anadarko Petroleum Corporation		07/24/2009
**Signature of Reporting Person		Date
/s/ Robert K. Reeves, Senior Vice President of Western Gas Resources, Inc.		07/24/2009
**Signature of Reporting Person		Date
/s/ Robert K. Reeves, Senior Vice President of WGR Holdings, LLC		07/24/2009
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	On July 22, 2009, in connection with the closing of the transactions contemplated by the Contribution Agreement (the "Contribution Agreement"), dated July 10, 2009, among Western Gas Resources, Inc. ("WGR"), WGR Asset Holding Company LLC, Anadarko Uintah Midstream, LLC, WGR Holdings, LLC ("WGR Holdings"), Western Gas Holdings, LLC (the "General Partner"), WES GP, Inc., Western Gas Partners, LP (the "Partnership"), Western Gas Operating, LLC and WGR Operating, LP, the Partnership acquired certain midstream assets for aggregate consideration of approximately $107 million. The consideration consisted of $101,450,500 in cash, 351,424 common units of the Partnership issued to WGR Holdings and 7,172 general partner units of the Partnership issued to the General Partner.
(2)	As of July 22, 2009, (i) WGR Holdings owns 99% of the membership interests in the General Partner, (ii) WGR owns all of the membership interests of WGR Holdings and (iii) Anadarko Petroleum Corporation ("Anadarko") owns all of the issued and outstanding shares of common stock of WGR. Accordingly, WGR and Anadarko may be deemed to be indirect beneficial owners of any securities held by WGR Holdings.

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