-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001352536-06-000032.txt : 20060705
<SEC-HEADER>0001352536-06-000032.hdr.sgml : 20060704
<ACCEPTANCE-DATETIME>20060705181132
ACCESSION NUMBER:		0001352536-06-000032
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060622
FILED AS OF DATE:		20060705
DATE AS OF CHANGE:		20060705

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTERN GAS RESOURCES INC
		CENTRAL INDEX KEY:			0000856716
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS DISTRIBUTION [4924]
		IRS NUMBER:				841127613
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1099 18TH STREET, SUITE 1200
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202-1955
		BUSINESS PHONE:		303 452 5603

	MAIL ADDRESS:	
		STREET 1:		1099 18TH STREET, SUITE 1200
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202-1955

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ANADARKO PETROLEUM CORP
		CENTRAL INDEX KEY:			0000773910
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10389
		FILM NUMBER:		06945726

	BUSINESS ADDRESS:	
		STREET 1:		1201 LAKE ROBBINS DRIVE
		CITY:			THE WOODLANDS
		STATE:			TX
		ZIP:			77380-1046
		BUSINESS PHONE:		8326367520

	MAIL ADDRESS:	
		STREET 1:		1201 LAKE ROBBINS DR.
		CITY:			THE WOODLANDS
		STATE:			TX
		ZIP:			77380
</SEC-HEADER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2006-06-22</periodOfReport>

    <dateOfOriginalSubmission>2006-06-29</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000856716</issuerCik>
        <issuerName>WESTERN GAS RESOURCES INC</issuerName>
        <issuerTradingSymbol>WGR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000773910</rptOwnerCik>
            <rptOwnerName>ANADARKO PETROLEUM CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1201 LAKE ROBBINS DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote (1 &amp; 2)</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 3 is being filed as a result of certain Voting Agreements covering 13,900,602 shares (the &quot;Shares&quot;) of common stock of Western Gas Resources, Inc. (&quot;Western Gas&quot;) entered into on June 22, 2006 between Anadarko Petroleum Corporation (&quot;Anadarko&quot;) and each of Dean Phillips, Bill M. Sanderson and Mabeth Sanderson, Cedar Assets Trust, James A. Senty, Roswitha Stonehocker, Walter L. Stonehocker, Brion Wise, John F. Chandler, and Peter A. Dea as part of a proposed acquisition of Western Gas by Anadarko.  The Shares include 749,464 shares that are issuable upon the exercise of outstanding stock options that are exercisable within 60 days of the date of the Voting Agreements.</footnote>
        <footnote id="F2">For additional information regarding the Voting Agreements and the acquisition of Western Gas by Anadarko, see the Schedule 13D filed by Anadarko with the Securities and Exchange Commission on June 29, 2006.  Anadarko expressly disclaims any beneficial ownership of the Shares.  Anadarko has no &quot;pecuniary interest&quot; in the Shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Charlene A. Ripley, Vice President, General Counsel, Corporate Secretary and Chief Compliance Officer</signatureName>
        <signatureDate>2006-07-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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