Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in Registration Statement no. 333-20829 of MarkWest Hydrocarbon, Inc. on Form S-8 of our report dated June 29, 2007, appearing in this Annual Report on Form 11-K of MarkWest Hydrocarbon, Inc. 401(k) Savings and Profit Sharing Plan for the year ended December 31, 2006.
/s/ DELOITTE & TOUCHE LLP |
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Denver, CO
June 29, 2007