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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 NPYLxgIRopOEVDb+cKyDVg==

<SEC-DOCUMENT>0001179110-07-018265.txt : 20070913
<SEC-HEADER>0001179110-07-018265.hdr.sgml : 20070913
<ACCEPTANCE-DATETIME>20070913153721
ACCESSION NUMBER:		0001179110-07-018265
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070905
FILED AS OF DATE:		20070913
DATE AS OF CHANGE:		20070913

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARKWEST HYDROCARBON INC
		CENTRAL INDEX KEY:			0001019756
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				841352233
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1515 ARAPAHOE STREET, TOWER 2, SUITE 700
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202-2126
		BUSINESS PHONE:		303-925-9200

	MAIL ADDRESS:	
		STREET 1:		1515 ARAPAHOE STREET, TOWER 2, SUITE 700
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202-2126

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MarkWest Energy GP, L.L.C.
		CENTRAL INDEX KEY:			0001412304

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14841
		FILM NUMBER:		071115507

	BUSINESS ADDRESS:	
		STREET 1:		1515 ARAPAHOE STREET, TOWER 2, SUITE 700
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
		BUSINESS PHONE:		303-925-9200

	MAIL ADDRESS:	
		STREET 1:		1515 ARAPAHOE STREET, TOWER 2, SUITE 700
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-09-05</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001019756</issuerCik>
        <issuerName>MARKWEST HYDROCARBON INC</issuerName>
        <issuerTradingSymbol>MWP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001412304</rptOwnerCik>
            <rptOwnerName>MarkWest Energy GP, L.L.C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1515 ARAPAHOE STREET</rptOwnerStreet1>
            <rptOwnerStreet2>TOWER 2, SUITE 700</rptOwnerStreet2>
            <rptOwnerCity>DENVER</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On September 5, 2007, MarkWest Energy Partners, L.P. (the &quot;Partnership&quot;) entered into an Agreement and Plan of Redemption and Merger (the &quot;Merger Agreement&quot;) by and among the Partnership, MarkWest Hydrocarbon, Inc. (&quot;MarkWest Hydrocarbon&quot;) and MWEP, L.L.C., a wholly owned subsidiary of the Partnership, pursuant to which MarkWest Hydrocarbon will be merged into the Partnership.  In connection with the Merger Agreement, the Partnership also entered into a Voting Agreement (the &quot;Voting Agreement&quot;) with John M. Fox and MWHC Holding, Inc.  Although MarkWest GP, L.L.C., the general partner of the Partnership may, by virtue of being the general partner of the Partnership and the Voting Agreement, be deemed beneficial owner pursuant to Section 13(d) of the Securities Exchange Act of 1934 (the &quot;Act&quot;) of the shares of MarkWest Hydrocarbon's common stock beneficially owned by John M. Fox and MWHC Holdings, Inc., the General Partner has no pecun
iary interest in such shares.</footnote>
        <footnote id="F2">Pursuant to Rule 16a-1(a)(4) under the Act, the General Partner hereby states that this Initial Statement of Beneficial Ownership of Securities on Form 3 shall not be deemed an admission that it is, for the purposes of Section 16 of the Act or otherwise, the beneficial owner of any equity securities of MarkWest Hydrocarbon and such beneficial ownership is expressly disclaimed.  For additional information regarding the Merger Agreement and the Voting Agreement, please see the Schedule 13D filed by the Partnership and the General Partner with the Securities and Exchange Commission on September 13, 2007.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ ANDREW L. SCHROEDER, VICE PRESIDENT &amp; TREASURER</signatureName>
        <signatureDate>2007-09-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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