EDGAR Filing Documents for 9999999997-12-009516

Form ARS - Annual Report to Security Holders:

SEC Accession No. 9999999997-12-009516

Filing Date

2012-04-26

Accepted

2012-05-15 10:15:22

Documents

Period of Report

2011-12-31

Effectiveness Date

2012-04-26

Document Format Files

Seq	Description	Document	Type	Size
1	AUTO-GENERATED PAPER DOCUMENT	9999999997-12-009516.paper	ARS	290
	Scanned paper document	scanned.pdf		21963781
	Complete submission text file	9999999997-12-009516.txt		1338

Mailing Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202

Business Address 1515 ARAPAHOE STREET TOWER 1, SUITE 1600 DENVER CO 80202 303-925-9200

MARKWEST ENERGY PARTNERS L P (Filer) CIK: 0001166036 (see all company filings)

IRS No.: 270005456 | Fiscal Year End: 1231
Type: ARS | Act: 34 | File No.: 001-31239 | Film No.: 12027131
SIC: 1311 Crude Petroleum & Natural Gas