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  <p style="border:none;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;letter-spacing:-.1pt;">UNITED STATES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;letter-spacing:-.1pt;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Washington, D.C. 20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;letter-spacing:-.1pt;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;letter-spacing:-.1pt;">CURRENT REPORT</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;letter-spacing:-.1pt;">PURSUANT TO SECTION&nbsp;13
  OR 15(d)&nbsp;OF</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;letter-spacing:-.1pt;">THE SECURITIES
  EXCHANGE ACT OF 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Date of Report (Date of earliest event
  reported) April&nbsp;24, 2008</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;letter-spacing:-.1pt;">MARKWEST ENERGY PARTNERS, L.P.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">(Exact name of registrant as specified in its charter)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
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    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Delaware</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;letter-spacing:-.1pt;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">001-31239</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;letter-spacing:-.1pt;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">27-0005456</font></b></p>
    </td>
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    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">(State or other jurisdiction
    of<br>
    incorporation or organization)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">(Commission File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;letter-spacing:-.1pt;">(I.R.S. Employer</font>
    <br>
    <font style="letter-spacing:-.1pt;">Identification Number)</font></font></p>
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  </div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">1515 Arapahoe
  Street, Tower 2, Suite&nbsp;700, Denver CO 80202<br> </font></b>&#160;<font style="letter-spacing:-.1pt;">(Address of principal executive offices)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Registrant&#146;s telephone number, including area code: <b>303-925-9200</b></font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">Not Applicable.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">(Former name or former address, if changed since last report.)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Check the appropriate box below if
  the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing
  obligation of the registrant under any of the following provisions (see General
  Instruction A.2. below):</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt .25in;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;letter-spacing:-.1pt;">o</font><font size="1" style="font-size:3.0pt;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="letter-spacing:-.1pt;">Written Communications pursuant to Rule&nbsp;425
  under the Securities Act (17 CFR 230.425)</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt .25in;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;letter-spacing:-.1pt;">o</font><font size="1" style="font-size:3.0pt;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="letter-spacing:-.1pt;">Soliciting material pursuant to Rule&nbsp;14a-12
  under the Exchange Act (17 CFR 240.14a-12)</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;text-autospace:none;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;letter-spacing:-.1pt;">o</font><font size="1" style="font-size:3.0pt;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="letter-spacing:-.1pt;">Pre-Commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under
  the Exchange Act (17 CFR 240.14d-2(b))</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;text-autospace:none;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;letter-spacing:-.1pt;">o</font><font size="1" style="font-size:3.0pt;letter-spacing:-.1pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="letter-spacing:-.1pt;">Pre-Commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under
  the Exchange Act (17 CFR 240.13e-4(c))</font></p>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  </div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\105534\08-12599-1\task2892721\12599-1-ba.htm',USER='105534',CD='Apr 25 13:51 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM 8.01. Other Events.</font></b></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On April&nbsp;24, 2008, the Board of
  Directors of the general partner of MarkWest Energy Partners, L.P. (the &#147;Partnership&#148;)
  declared the Partnership&#146;s quarterly cash distribution of $0.60 per common unit
  for the first quarter of 2008, for an implied annual rate of $2.40 per common
  unit.&#160; This is an increase of $0.03 per
  common unit, or 5 percent, over the fourth quarter 2007 distribution and $0.09
  per common unit, or 18 percent, over the first quarter 2007 distribution.&#160; The first quarter distribution is payable May&nbsp;15,
  2008, to unitholders of record on May&nbsp;5, 2008.&#160; The ex-dividend date is May&nbsp;1,
  2008.&#160; On April&nbsp;24, 2008, the
  Partnership issued a press release relating to the first quarter
  distribution.&#160; A copy of the press
  release is filed as Exhibit&nbsp;99.1 to this Current Report on Form&nbsp;8-K.</font></p>
  
  <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">Cautionary Statements</font></i></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">This press release includes &#147;forward-looking
  statements.&#148;&#160; All statements other than
  statements of historical facts included or incorporated herein may constitute
  forward-looking statements.&#160; Actual
  results could vary significantly from those expressed or implied in such
  statements and are subject to a number of risks and uncertainties.&#160; Although we believe that the expectations
  reflected in the forward-looking statements are reasonable, we can give no
  assurance that such expectations will prove to be correct.&#160; The forward-looking statements involve risks
  and uncertainties that affect our operations, financial performance and other
  factors as discussed in our filings with the Securities and Exchange
  Commission.&#160; Among the factors that could
  cause results to differ materially are those risks discussed in our Form&nbsp;10-K
  for the year ended December&nbsp;31, 2007, as filed with the SEC.&#160; You are urged to carefully review and
  consider the cautionary statements and other disclosures made in those filings,
  specifically those under the heading &#147;Risk Factors.&#148;&#160; We do not undertake any duty to update any
  forward-looking statement except as required by law.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;text-indent:.5in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM
  9.01.&#160; Financial Statements and Exhibits</font></b></p>
  
  <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="left" style="font-size:10.0pt;letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt .5in;text-align:left;text-autospace:none;text-indent:-.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Exhibits.</p>
  
  <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt .5in;text-align:left;text-autospace:none;text-indent:-.25in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="8%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:8.08%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit&nbsp;No.</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="89%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:89.42%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description of Exhibit</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="8%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:8.08%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="89%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:89.42%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="8%" valign="top" style="padding:0in 0in 0in 0in;width:8.08%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.42%;">
    <p align="left" style="letter-spacing:-.1pt;line-height:normal;margin:0in 0in .0001pt;text-align:left;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press
    Release dated April&nbsp;24, 2008, announcing first quarter 2008 cash
    distribution</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\105534\08-12599-1\task2892721\12599-1-ba.htm',USER='105534',CD='Apr 25 13:51 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;letter-spacing:-.1pt;">SIGNATURE</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Pursuant
  to the requirements of the Securities and Exchange Act of 1934, the Registrant
  has duly caused this report to be signed on its behalf by the undersigned,
  thereunto duly authorized.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="letter-spacing:-.1pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.16%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">MARKWEST ENERGY PARTNERS, L.P.</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.16%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p style="margin:0in 0in .0001pt 79.95pt;text-autospace:none;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">(Registrant)</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">By:</font></p>
    </td>
    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">MarkWest Energy, G.P., L.L.C.,</font></p>
    </td>
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    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.16%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Its General Partner</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Date: April&nbsp;25, 2008</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">By:</font></p>
    </td>
    <td width="45%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">/s/ NANCY K. BUESE</font></p>
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="45%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;letter-spacing:-.1pt;">Nancy K. Buese</font></p>
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    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.16%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;letter-spacing:-.1pt;">&nbsp;</font></p>
    </td>
    <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;letter-spacing:-.1pt;">Senior Vice
    President and Chief Financial Officer</font></i></p>
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  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
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text: UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  Washington, D.C. 20549
  FORM 8-K
  CURRENT REPORT
  PURSUANT TO SECTION 13
  OR 15(d) OF
  THE SECURITIES
  EXCHANGE ACT OF 1934
  Date of Report (Date of earliest event
  reported) April 24, 2008
  MARKWEST ENERGY PARTNERS, L.P.
  (Exact name of registrant as specified in its charter)
  Delaware
  001-31239
  27-0005456
  (State or other jurisdiction
    of
  incorporation or organization)
  (Commission File Number)
  (I.R.S. Employer
  Identification Number)
  1515 Arapahoe
  Street, Tower 2, Suite 700, Denver CO 80202
  (Address of principal executive offices)
  Registrant's telephone number, including area code:
  303-925-9200
  Not Applicable.
  (Former name or former address, if changed since last report.)
  Check the appropriate box below if
  the Form 8-K filing is intended to simultaneously satisfy the filing
  obligation of the registrant under any of the following provisions (see General
  Instruction A.2. below):
  o
  Written Communications pursuant to Rule 425
  under the Securities Act (17 CFR 230.425)
  o
  Soliciting material pursuant to Rule 14a-12
  under the Exchange Act (17 CFR 240.14a-12)
  o
  Pre-Commencement communications pursuant to Rule 14d-2(b) under
  the Exchange Act (17 CFR 240.14d-2(b))
  o
  Pre-Commencement communications pursuant to Rule 13e-4(c) under
  the Exchange Act (17 CFR 240.13e-4(c))
  ITEM 8.01. Other Events.
  On April 24, 2008, the Board of
  Directors of the general partner of MarkWest Energy Partners, L.P. (the "Partnership")
  declared the Partnership's quarterly cash distribution of $0.60 per common unit
  for the first quarter of 2008, for an implied annual rate of $2.40 per common
  unit.  This is an increase of $0.03 per
  common unit, or 5 percent, over the fourth quarter 2007 distribution and $0.09
  per common unit, or 18 percent, over the first quarter 2007 distribution.  The first quarter distribution is payable May 15,
  2008, to unitholders of record on May 5, 2008.  The ex-dividend date is May 1,
  2008.  On April 24, 2008, the
  Partnership issued a press release relating to the first quarter
  distribution.  A copy of the press
  release is filed as Exhibit 99.1 to this Current Report on Form 8-K.
  Cautionary Statements
  This press release includes "forward-looking
  statements."  All statements other than
  statements of historical facts included or incorporated herein may constitute
  forward-looking statements.  Actual
  results could vary significantly from those expressed or implied in such
  statements and are subject to a number of risks and uncertainties.  Although we believe that the expectations
  reflected in the forward-looking statements are reasonable, we can give no
  assurance that such expectations will prove to be correct.  The forward-looking statements involve risks
  and uncertainties that affect our operations, financial performance and other
  factors as discussed in our filings with the Securities and Exchange
  Commission.  Among the factors that could
  cause results to differ materially are those risks discussed in our Form 10-K
  for the year ended December 31, 2007, as filed with the SEC.  You are urged to carefully review and
  consider the cautionary statements and other disclosures made in those filings,
  specifically those under the heading "Risk Factors."  We do not undertake any duty to update any
  forward-looking statement except as required by law.
  ITEM
  9.01.  Financial Statements and Exhibits
  (d)
  Exhibits.
  Exhibit No.
  Description of Exhibit
  99.1
  Press
    Release dated April 24, 2008, announcing first quarter 2008 cash
    distribution
  2
  SIGNATURE
  Pursuant
  to the requirements of the Securities and Exchange Act of 1934, the Registrant
  has duly caused this report to be signed on its behalf by the undersigned,
  thereunto duly authorized.
  MARKWEST ENERGY PARTNERS, L.P.
  (Registrant)
  By:
  MarkWest Energy, G.P., L.L.C.,
  Its General Partner
  Date: April 25, 2008
  By:
  /s/ NANCY K. BUESE
  Nancy K. Buese
  Senior Vice
    President and Chief Financial Officer
  3