SEC FORM 4/A

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

1. Name and Address of Reporting Person^*

DENNEY ARTHUR J

(Last)

(First)

(Middle)

C/O MARKWEST HYDROCARBON, INC.

155 INVERNESS DRIVE WEST, STE 200

(Street)

ENGLEWOOD

80112

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
MARKWEST HYDROCARBON INC [ MWP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Executive Vice President

3. Date of Earliest Transaction (Month/Day/Year)
06/19/2003

4. If Amendment, Date of Original Filed (Month/Day/Year)
08/19/2003

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 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/19/2003		M		11,485⁽¹⁾	A	$6.99	33,510⁽¹⁾	D
Common Stock	06/19/2003		F		10,530⁽¹⁾	D	$8	22,980⁽¹⁾	D
Common Stock	06/19/2003		M		855⁽¹⁾	A	$5.38	23,835⁽¹⁾	D
Common Stock	06/19/2003		F		670⁽¹⁾	D	$8	23,165⁽¹⁾⁽²⁾	D
Common Stock								1,320⁽³⁾	I	As custodian under UTMA for minor child
Common Stock								1,320⁽³⁾	I	As custodian under UTMA for minor child

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (right to buy)	$6.99	06/19/2003		M			11,485⁽¹⁾	08/01/2000	08/01/2003	Common Stock	11,485⁽¹⁾	$0	0	D
Stock Option (right to buy)	$5.38⁽⁴⁾	06/19/2003		M			855⁽¹⁾	⁽⁵⁾	11/30/2009	Common Stock	855⁽¹⁾	$0	6,525⁽³⁾	D
Stock Option (right to buy)	$9.09⁽³⁾							⁽⁶⁾	10/09/2004	Common Stock	14,300⁽³⁾		14,300⁽³⁾	D
Stock Option (right to buy)	$9.77⁽³⁾							⁽⁶⁾	12/11/2007	Common Stock	17,161⁽³⁾		17,161⁽³⁾	D
Stock Options (right to buy)	$9.77⁽³⁾							⁽⁶⁾	08/03/2008	Common Stock	5,212⁽³⁾		5,212	D
Stock Option (right to buy)	$9.55⁽³⁾							⁽⁷⁾	12/10/2008	Common Stock	7,300⁽³⁾		7,300⁽³⁾	D
Stock Option (right to buy)	$7.85⁽³⁾							⁽⁶⁾	06/18/2009	Common Stock	5,232⁽³⁾		5,232⁽³⁾	D
Stock Option (right to buy)	$7.96⁽³⁾							⁽⁵⁾	07/26/2010	Common Stock	2,504⁽³⁾		2,504⁽³⁾	D
Stock Option (right to buy)	$7.96⁽³⁾							⁽⁸⁾	07/26/2010	Common Stock	836⁽³⁾		836⁽³⁾	D
Stock Option (right to buy)	$10.23⁽³⁾							⁽⁵⁾	12/07/2010	Common Stock	2,494⁽³⁾		2,494⁽³⁾	D
Stock Option (right to buy)	$10.23⁽³⁾							⁽⁸⁾	12/07/2010	Common Stock	832⁽³⁾		832⁽³⁾	D
Stock Option (right to buy)	$6.96⁽³⁾							⁽⁵⁾	08/01/2011	Common Stock	2,721⁽³⁾		2,721⁽³⁾	D

Explanation of Responses:

1. Amount reported reflect ownership amounts prior to the issuer's issuance on August 11, 2003 of a 1 for 10 stock dividend.

2. After giving effect to the 1 for 10 stock dividend, as of August 19, 2003 (the date of the filing of the original Form 4 to which this amendment relates), the reporting person beneficially owned directly approximately 25,482 shares of common stock following all reported transactions.

3. Amounts reported reflect (i) with respect to the common stock, ownership amounts after giving effect to the 1 for 10 stock dividend, and (ii) with respect to the stock options, the number of shares underlying the stock options and exercise prices per share after giving effect to the adjustments necessary to restore the reporting person's economic interest in the applicable stock option to that which existed immediately prior to the dividend.

4. The exercise price reported reflects the price prior to the 1 for 10 stock dividend. The exercise price was adjusted to $4.89 per share, with respect only to the shares underlying the stock option after the stock dividend, in connection with the 1 for 10 tock dividend to restore the reporting person's economic interest in the remaining portion of the stock option to that which existed immediately prior to the dividend.

5. The stock option vests in four equal annual installments beginning on the first anniversary of the grant date, which grant date is ten years prior to the option expiration date reported.

6. The stock option vested in installments pursuant to an option grant and has fully vested.

7. The stock option vests in five equal annual installments beginning on December 10,1999.

8. The stock option vested on the date that is nine years prior to the option expiration date reported.

Remarks:

This report is being filed to correct inadvertent typographical errors, to correct a report of a sale previously reported, and to report correctly the end of period holdings for each separate class of derivative securities previously reported in the aggregate. The reporting person discovered that the previously reported end of period derivative holdings were being reported incorrectly when the issuer changed law firms.

	Lucy Woods POA for Arthur J Denney	09/08/2003
	** 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 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).
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