EX-23.2 8 a2075141zex-23_2.htm EXHIBIT 23.2

EXHIBIT 23.2

[CAWLEY, GILLESPIE & ASSOCIATES LETTERHEAD]

March 26, 2002

MarkWest Hydrocarbon, Inc.
155 Inverness Drive West, Suite 200
Englewood, Colorado 80112

Ladies and Gentlemen:

Cawley, Gillespie & Associates, Inc. hereby consents to the use of the oil and gas reserve information in the MarkWest Hydrocarbon, Inc. Securities & Exchange Commission Form 10-K for the year ended December 31, 2001 and in the MarkWest Hydrocarbon, Inc. Annual Report for the year ended December 31, 2001 based on reserve reports prepared by Cawley, Gillespie & Associates, Inc. and dated March 15, 2002.

                        Sincerely,

                        CAWLEY, GILLESPIE & ASSOCIATES, INC.

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