SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
MarkWest Energy GP, L.L.C.

(Last) (First) (Middle)
1515 ARAPAHOE STREET
TOWER 2, SUITE 700

(Street)
DENVER CO 80202

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
09/05/2007
3. Issuer Name and Ticker or Trading Symbol
MARKWEST HYDROCARBON INC [ MWP ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock 0(1)(2) I See footnote(1)(2)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. On September 5, 2007, MarkWest Energy Partners, L.P. (the "Partnership") entered into an Agreement and Plan of Redemption and Merger (the "Merger Agreement") by and among the Partnership, MarkWest Hydrocarbon, Inc. ("MarkWest Hydrocarbon") 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 "Voting Agreement") 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 "Act") of the shares of MarkWest Hydrocarbon's common stock beneficially owned by John M. Fox and MWHC Holdings, Inc., the General Partner has no pecuniary interest in such shares.
2. 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.
/s/ ANDREW L. SCHROEDER, VICE PRESIDENT & TREASURER 09/13/2007
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (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).
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