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Exhibit 23.2
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration Statement Nos. 333-133439, 333-138744 and 333-142358 on Form S-3 and Registration Statement No. 333-91120 on Form S-8 of our report dated March 6, 2007 (November 2, 2007 as to the effects of the restatement discussed in Note 23), relating to the financial statements of MarkWest Energy Partners, L.P. and subsidiaries (which report expresses an unqualified opinion and includes an explanatory paragraph relating to the restatement discussed in Note 23), and of our report on internal control over financial reporting dated March 6, 2007 (November 2, 2007 as to the effects of the material weakness discussed in Management's Report on Internal Control over Financial Reporting as revised) (which report expresses an adverse opinion on the effectiveness of the Partnership's internal control over financial reporting because of a material weakness) appearing in this Annual Report on Form 10-K/A of MarkWest Energy Partners, L.P. for the year ended December 31, 2006.
/s/ DELOITTE & TOUCHE LLP
Denver, Colorado
November 2, 2007
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM