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 <p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><a name="scotch"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">As filed with the Securities and Exchange Commission on April&nbsp;5, 2007</font></b></a></p> <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0pt 0pt 0pt 0pt;"> <p align="right" style="border:none;margin:0pt 0pt .0001pt;padding:0pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Registration No. 333-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></b></p> </div>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<p align="center" style="font-size:10.0pt;margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
STATES<br>
SECURITIES AND EXCHANGE COMMISSION<br>
</font>Washington, D.C. 20549</b></p>

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<p align="center" style="margin:6.0pt 0pt 12.0pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM S-8</font></b></p>

<p align="center" style="margin:6.0pt 0pt 12.0pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">REGISTRATION STATEMENT<br>
UNDER<br>
THE SECURITIES ACT OF 1933</font></b></p>

<div style="line-height:9.0pt;margin:0pt 0pt 12.0pt;page-break-after:avoid;text-align:center;"><hr size="1" width="160" noshade color="black" align="center" style="width:120.0pt;"></div>

<p align="center" style="font-size:10.0pt;margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">MARKWEST
HYDROCARBON, INC.<br>
</font></b>(Exact name of Registrant as specified in its charter)</p>

<div align="center">

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="font-size:10.0pt;margin:0pt 0pt .0001pt;text-align:center;"><!-- SET mrlNoTableShading --><b>Delaware</b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">84-1352233</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other
  jurisdiction of incorporation or organization)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(I.R.S. Employer
  Identification No.)</font></p>
  </td>
 </tr>
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1515
  Arapahoe Street, Tower 2</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Suite
  700, Denver, CO</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">80202-2102</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of
  Principal Executive Offices)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:2.38%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.8%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Zip Code)</font></p>
  </td>
 </tr>
</table>

</div>

<p style="line-height:1.0pt;margin:0pt 0pt 12.0pt;"><font size="1" face="Times New Roman">&nbsp;</font></p>

<p align="center" style="font-size:10.0pt;margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MarkWest
Hydrocarbon, Inc. 2006 Stock Incentive Plan<br>
</font></b>(Full title of the Plan)</p>

<div style="line-height:9.0pt;margin:0pt 0pt 12.0pt;page-break-after:avoid;text-align:center;"><hr size="1" width="160" noshade color="black" align="center" style="width:120.0pt;"></div>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">C. Corwin Bromley</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">General Counsel</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MarkWest Hydrocarbon, Inc.</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1515
Arapahoe Street, Tower 2</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Suite
700</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Denver, Colorado 80202-2102</font></b></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(303) 925-9200</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name, address and telephone number, including area
code, of agent for service)</font></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Copy to:<br>
<b>George Hagerty, Esq.<br>
Hogan &amp; Hartson L.L.P.<br>
One Tabor Center, Suite 1500<br>
1200 Seventeenth Street<br>
Denver, Colorado 80202<br>
(303) 899-7300</b></font></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">CALCULATION
OF REGISTRATION FEE</font></b></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr style="page-break-inside:avoid;">
  <td width="35%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:35.26%;">
  <p style="font-size:8.0pt;font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><!-- SET mrlNoTableShading -->Title&nbsp;of&nbsp;securities<br>
  to&nbsp;be&nbsp;registered</p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="13%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:13.72%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Amount<br>
  to&nbsp;be<br>
  Registered&nbsp;(1)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="13%" colspan="2" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:13.72%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Proposed&nbsp;maximum<br>
  offering&nbsp;price<br>
  per&nbsp;share&nbsp;(2)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="13%" colspan="2" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:13.72%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Proposed&nbsp;maximum<br>
  aggregate&nbsp;offering<br>
  price&nbsp;(2)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="13%" colspan="2" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:13.72%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Amount&nbsp;of<br>
  registration<br>
  fee&nbsp;(2)</font></b></p>
  </td>
  <td width="0%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:.34%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="35%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:35.26%;">
  <p style="margin:0pt 0pt .0001pt 10.0pt;page-break-after:avoid;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Common Stock, par value
  $.01 per share</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="13%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:13.72%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1,000,000</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="0%" valign="bottom" style="padding:0pt 0pt 0pt 0pt;width:.98%;">
  <p align="left" style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="12%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:12.74%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">62.33</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="0%" valign="bottom" style="padding:0pt 0pt 0pt 0pt;width:.98%;">
  <p align="left" style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="12%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:12.74%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">62,330,000</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.38%;">
  <p style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="0%" valign="bottom" style="padding:0pt 0pt 0pt 0pt;width:.98%;">
  <p align="left" style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="12%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:12.74%;">
  <p style="margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1,913.53</font></p>
  </td>
  <td width="0%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:.34%;">
  <p style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr height="0">
  <td width="263" style="border:none;"></td>
  <td width="17" style="border:none;"></td>
  <td width="102" style="border:none;"></td>
  <td width="18" style="border:none;"></td>
  <td width="7" style="border:none;"></td>
  <td width="97" style="border:none;"></td>
  <td width="18" style="border:none;"></td>
  <td width="7" style="border:none;"></td>
  <td width="97" style="border:none;"></td>
  <td width="18" style="border:none;"></td>
  <td width="7" style="border:none;"></td>
  <td width="95" style="border:none;"></td>
  <td width="2" style="border:none;"></td>
 </tr>
</table>

<p style="line-height:1.0pt;margin:0pt 0pt 12.0pt;"><font size="1" face="Times New Roman">&nbsp;</font></p>

<div style="margin:0pt 0pt .0001pt;page-break-after:avoid;"><hr size="1" width="160" noshade color="black" align="left" style="width:120.0pt;"></div>

<p style="font-size:10.0pt;margin:3.0pt 0pt 12.0pt 18.0pt;text-indent:-18.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Pursuant to Rule 416
under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;), this
registration statement covers, in addition to the number of shares of common
stock shown above, an indeterminate number of shares of common stock that, by
reason of certain events specified in the plan (e.g., anti-dilution
adjustments), may become subject to such plan.</p>

<p style="font-size:10.0pt;margin:0pt 0pt 12.0pt 18.0pt;text-indent:-18.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Estimated solely for the
purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h)
under the Securities Act on the basis of the average of the high and low prices
reported for the Registrant&#146;s common stock on the American Stock Exchange on April
4, 2007.</p>


 <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0pt 0pt 0pt 0pt;"> <p align="center" style="border:none;margin:0pt 0pt .0001pt;padding:0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p> </div>
</div><br><hr size="3" width="100%" noshade color="#010101" align="center">

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<div>


<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">PART I</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INFORMATION
REQUIRED IN SECTION 10(a) PROSPECTUS</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 1.&#160;&#160;&#160; Plan
Information.*</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 2. &#160;&#160; Registrant
Information and Employee Plan Annual Information.*</font></b></p>

<div style="margin:0pt 0pt .0001pt;page-break-after:auto;"><hr size="1" width="160" noshade color="black" align="left" style="width:120.0pt;"></div>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt 49.5pt;text-indent:-13.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">*</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>The documents containing the information
specified in Part&nbsp;I will be sent or given to participants in the MarkWest
Hydrocarbon, Inc. 2006 Stock Incentive Plan (the &#147;Plan&#148;) as specified by
Rule&nbsp;428(b)(1)&nbsp;under the Securities Act.&#160; Pursuant to the Note to Part&nbsp;I of
Form&nbsp;S-8, such documents will not be filed with the Securities and
Exchange Commission (the &#147;Commission&#148;) either as part of this registration
statement or as prospectuses or prospectus supplements pursuant to
Rule&nbsp;424 under the Securities Act. These documents and the documents
incorporated by reference pursuant to Item 3 of Part&nbsp;II of this registration
statement, taken together, constitute the prospectus that meets the
requirements by Section&nbsp;10(a)&nbsp;of the Securities Act.</p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">PART II</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INFORMATION REQUIRED IN THE
REGISTRATION STATEMENT</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 3. &#160;&#160; Incorporation
of Documents by Reference.</font></b></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
following documents and all other documents subsequently filed with the
Commission by MarkWest Hydrocarbon, Inc. (the &#147;Registrant&#148;) pursuant to
Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as
amended (the &#147;Exchange Act&#148;), prior to the filing of a post-effective amendment
that indicates that all the shares of common stock offered hereby have been
sold or that deregisters all such shares of common stock then remaining unsold,
shall be deemed incorporated by reference herein and to be a part of this
registration statement from the date of filing of such documents:</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; the Registrant&#146;s annual report on
Form 10-K/A for its fiscal year ended December 31, 2006, filed with the
Commission on March 22, 2007 (File No. 001-14841);</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; the Registrant&#146;s current reports on
Form 8-K, filed with the Commission on January&nbsp;29, 2007, February&nbsp;1,
2007, February&nbsp;2, 2007, February&nbsp;23, 2007 and March&nbsp;20, 2007;</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; the Registrant&#146;s definitive proxy
statement on Schedule 14A filed with the Commission on May 1, 2006; and</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; the description of the Registrant&#146;s
common stock as set forth in the Registrant&#146;s registration statement on Form
8-A&#160; filed with the Commission on
February 17, 1997 (File No. 001-14841).</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Any
statement contained herein or in a document incorporated or deemed to be
incorporated by reference shall be deemed to be modified or superseded for
purposes of this registration statement to the extent that a statement
contained in any other subsequently filed document which also is or is deemed
to be incorporated by reference herein modifies or supersedes such prior
statement.&#160; Any such statement so
modified or superseded shall not be deemed to constitute a part of this
registration statement, except as so modified or superseded.</font></p>


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<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
4.&#160; Description of Securities.</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Not applicable.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
5.&#160; Interests of Named Experts and
Counsel.</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Not applicable.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
6.&#160; Indemnification of Officers and
Directors.</font></b></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
Registrant&#146;s certificate of incorporation provides that the Registrant shall,
to the fullest extent permitted by the laws of the State of Delaware, indemnify
any person who is or was a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative by reason of the fact that he or she
is or was a director, officer, employee or agent of the Registrant, or is or
was serving at the request of the Registrant as a director, officer, employee
or agent of or in any other capacity with another corporation, partnership,
joint venture, trust or other enterprise, against expenses (including attorneys&#146;
fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by such person in connection with such action, suit or proceeding if
he or she acted in good faith and in a manner such person reasonably believed
to be in or not opposed to the best interests of the Registrant, and, with
respect to any criminal action or proceeding, had no reasonable cause to
believe that such person&#146;s conduct was unlawful.&#160; The Registrant shall pay the expenses
incurred in defending a civil or criminal action, suit or proceeding against a
director of the Registrant and may pay the expenses incurred in defending a
civil or criminal action, suit or proceeding against an officer, trustee, employee
or agent of the Registrant in advance of the final disposition of such action,
suit or proceeding as authorized by the board of directors of the Registrant
upon receipt of an undertaking by or on behalf of the indemnified person to
repay such amount if it shall ultimately be determined that such person is not
entitled to be indemnified.</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In
accordance with Section 102(b)(7) of the Delaware General Corporation Law (the &#147;DCGL&#148;),
the Registrant&#146;s certificate of incorporation provides that no director shall be
personally liable to the Registrant or any stockholder for monetary damages for
breach of fiduciary duty as a director, except (i) under Section 174 of DCGL or
any amendment thereto or successor provision thereto providing for liability of
directors for unlawful payment of dividends or unlawful stock purchases or
redemptions, (ii) for any breach of the director&#146;s duty of loyalty to the
Registrant or its stockholders, (iii) for acts or omissions of such director
not in good faith, (iv) for any acts or omissions involving intentional
misconduct or a knowing violation of law, or (v) for any transaction from which
such director received an improper benefit.&#160;
The certificate also provides that if the DGCL is amended to authorize
corporate action further eliminating or limiting the personal liability of
directors, then the liability of a director of the Registrant shall be
eliminated or limited to the fullest extent permitted under the DGCL, as so
amended.&#160; In addition, the Registrant&#146;s
certificate of incorporation also provides that the Registrant shall have the
power to purchase and maintain insurance on behalf of any person who is or was
a director, officer, employee or agent of the Registrant, or is or was serving
at the request of the Registrant as a director, officer, employee or agent of
another corporation, partnership, joint venture, trust or other enterprise
against any liability asserted against such person and incurred by such person
in any such capacity, or arising out of such person&#146;s status as such, whether
or not Registrant would have the power to indemnify such person under the
indemnification provisions of the Registrant&#146;s certificate of incorporation.</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
Registrant&#146;s bylaws provide that the Registrant shall indemnify such person for
such liabilities in such manner under such circumstances, and to such extent,
as permitted by the Registrant&#146;s certificate of incorporation and by Section
145 of the DGCL as in effect at the time the bylaws were adopted or as
subsequently amended.&#160; The bylaws also
provide that the Registrant&#146;s board of directors may authorize the purchase and
maintenance of insurance and/or the execution of individual agreements for the
purpose of such indemnification, and the Registrant shall advance all
reasonable costs and expenses (including attorney&#146;s fees) incurred in defending
any action, suit or proceeding to all persons entitled to indemnification under
the bylaws, in the manner, under the circumstances and to the extent permitted
by the Registrant&#146;s certificate of incorporation and Section 145 of the
DGCL.&#160; In accordance with the bylaws, the
Registrant has entered into indemnification agreeements with certain directors
and officers.</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Section
145 of the DGCL provides that a corporation has the power to indemnify a
director, officer, employee or agent of the corporation and certain other
persons serving at the request of the corporation in related capacities against
amounts paid and expenses incurred in connection with an action, suit or
proceeding to which such person is or threatened to be made a party by reason
of such position, if such person shall have acted in good faith and in a manner
he reasonably believed to be in or not opposed to the best interests of the
corporation, and, in any criminal proceeding, if such person had no reasonable
cause to believe the conduct was unlawful; provided that, in the case of
actions brought by or in the right of</font></p>


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<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">the corporation,
no indemnification shall be made with respect to any matter as to which such
person shall have been adjudged to be liable to the corporation unless and only
to the extent that the adjudicating court determines that such person is fairly
and reasonably entitled to indemnification or as a court deems proper.</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In
addition, the Registrant maintains insurance to cover its directors, officers
and, in certain circumstances, its employees against liability incurred while
acting on behalf of the Registrant.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
7.&#160; Exemption from Registration Claimed.</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Not applicable.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 8.&#160;&#160;&#160; Exhibits.</font></b></p>

<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;font-family:Times New Roman;margin-left:60.0pt;">
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p align="left" style="font-size:8.0pt;font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:left;"><!-- SET mrlHTMLTableLeft --><!-- SET mrlNoTableShading -->Exhibit No.</p>
  </td>
  <td width="20" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="516" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Description of Exhibit</font></b></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.1</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MarkWest Hydrocarbon, Inc. 2006 Stock Incentive Plan
  (incorporated by reference to the Registrant&#146;s Definitive Proxy Statement on
  Schedule 14A (File No. 001-14841) filed on May 1, 2006 in connection with the
  Registrant&#146;s June 15, 2006 Annual Meeting of Stockholders).</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion of Hogan &amp; Hartson L.L.P. with respect
  to the legality of the common stock registered hereby.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of Hogan &amp; Hartson L.L.P. (contained in
  its opinion filed herewith as Exhibit 5.1).</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.2</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of Deloitte &amp; Touche LLP, Independent
  Registered Public Accounting Firm, with respect to the Registrant.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.3</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of KPMG LLP, Independent Registered Public
  Accounting Firm, with respect to the Registrant.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="56" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.0pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">24.1</font></p>
  </td>
  <td width="20" valign="top" style="padding:0pt .7pt 0pt 0pt;width:15.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="516" valign="top" style="padding:0pt .7pt 0pt 0pt;width:386.8pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Power of Attorney (included on the signature page to
  this registration statement).</font></p>
  </td>
 </tr>
</table>

<p style="margin:0pt 0pt .0001pt 180.0pt;text-indent:-108.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 9. Undertakings.</font></b></p>

<p style="margin:0pt 0pt 12.0pt 36.0pt;text-indent:-9.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)&#160; The
undersigned Registrant hereby undertakes:</font></p>

<p style="margin:0pt 0pt 12.0pt 72.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)&#160; To file, during any period
in which offers or sale are being made, a post-effective amendment to this registration
statement:</font></p>

<p style="margin:0pt 0pt 12.0pt 72.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(i)&#160; To include
any prospectus required by Section 10(a)(3) of the Securities Act;</font></p>

<p style="margin:0pt 0pt 12.0pt 108.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(ii)&#160; To reflect
in the prospectus any facts or events arising after the effective date of registration
statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the
information set forth in registration statement - notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume
and price represent no more than a 20% change in the maximum aggregate offering
price set forth in the &#147;Calculation of Registration Fee&#148; table in the effective
registration statement; and</font></p>


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<p style="margin:0pt 0pt 12.0pt 108.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(iii)&#160; To
include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to
such information in the registration statement.</font></p>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt 72.0pt;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">Provided, however</font></i>, that
paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in reports filed with or furnished to the Commission by
the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that
are incorporated by reference in this registration statement.</p>

<p style="margin:0pt 0pt 12.0pt 72.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)&#160; That, for the purpose of
determining any liability under the Securities Act, each such post-effective
amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial <i>bona fide </i>offering
thereof.</font></p>

<p style="margin:0pt 0pt 12.0pt 72.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(3)&#160; To remove from registration
by means of a post-effective amendment any of the securities being registered
which remain unsold at the termination of the offering.</font></p>

<p style="margin:0pt 0pt 12.0pt 36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)&#160; The
undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act, each filing of the Registrant&#146;s annual
report pursuant to Section 13(a) or Section 15(d) of the Exchange Act that is
incorporated by reference in this registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and
the offering of such securities at that time shall be deemed to be the initial <i>bona fide</i> offering thereof.</font></p>

<p style="margin:0pt 0pt 12.0pt 36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)&#160; Insofar as
indemnification for liabilities arising under the Securities Act may be
permitted to directors, officers and controlling persons of the Registrant
pursuant to the foregoing provisions, or otherwise, the Registrant has been
advised that in the opinion of the Commission such indemnification is against
public policy as expressed in the Securities Act and is, therefore,
unenforceable.&#160; In the event that a claim
for indemnification against such liabilities (other than for the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of competent jurisdiction the question of whether
such indemnification by it is against public policy as expressed by the
Securities Act and will be governed by the final adjudication of such issue.</font></p>


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<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Act of
1933, as amended, the Registrant certifies that it has reasonable grounds to
believe that it meets all of the requirements for filing on Form S-8 and has
duly caused this registration statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Denver, State of
Colorado, on this 5</font><font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">th</font>&#160;day of April, 2007.</p>

<p style="margin:0pt 0pt .0001pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;font-family:Times New Roman;width:100.0%;">
 <tr style="page-break-inside:avoid;">
  <td width="58%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:58.12%;">
  <p style="font-size:10.0pt;margin:0pt 0pt .0001pt;"><!-- SET mrlNoTableShading --></p>
  </td>
  <td width="41%" colspan="2" valign="top" style="padding:0pt .7pt 0pt 0pt;width:41.88%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MARKWEST HYDROCARBON, INC.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="58%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:58.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:38.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="58%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:58.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
  </td>
  <td width="38%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:38.66%;">
  <p style="margin:0pt 0pt .0001pt 30.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ Frank M. Semple</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="58%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:58.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:38.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">Name: &nbsp;</font>Frank M. Semple</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="58%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:58.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:38.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">Title:&nbsp;&nbsp; &nbsp;</font>President and Chief Executive Officer</font></p>
  </td>
 </tr>
</table>

<p style="margin:0pt 0pt .0001pt;text-indent:72.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints each of Frank M. Semple and Nancy K. Buese,
jointly and severally, each in his or her own capacity, his or her true and
lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, to sign, execute and file with the Commission (or any other
governmental or regulatory authority), for us and in our names in the
capacities indicated below, this registration statement on Form S-8 (including
all amendments thereto) with all exhibits and any and all documents required to
be filed with respect thereto, granting unto said attorneys-in-fact and agents
and each of them, full power and authority to do and to perform each and every
act and thing necessary or desirable to be done in and about the premises in
order to effectuate the same as fully to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or any of them, may lawfully
do or cause to be done by virtue hereof.</font></p>

<p style="margin:0pt 0pt 12.0pt;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Act of 1933, as amended,
this registration statement has been signed by the following persons in the
capacities and on the dates indicated.</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;font-family:Times New Roman;width:100.0%;">
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p align="left" style="font-size:8.0pt;font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:left;"><!-- SET mrlNoTableShading --><font style="text-transform:uppercase;">Signature</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;text-transform:uppercase;">&nbsp;</font></b></p>
  </td>
  <td width="44%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;text-transform:uppercase;">title</font></b></p>
  </td>
  <td width="3%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;text-transform:uppercase;">&nbsp;</font></b></p>
  </td>
  <td width="18%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;text-transform:uppercase;">Date</font></b></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ FRANK M. SEMPLE </font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">President, Chief Executive Officer and </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">FRANK M. SEMPLE</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="font-size:10.0pt;margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director </font><font style="text-transform:uppercase;">(Principal Executive Officer)</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ NANCY K. BUESE </font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Senior Vice President, CHIEF FINANCIAL </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="3" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">NANCY K. BUESE</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">OFFICER (Principal Financial Officer </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">and principal Accounting officer)</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Chairman of the Board of Directors</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
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  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">JOHN M. FOX</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ MICHAEL L. BEATTY </font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MICHAEL L. BEATTY</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
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  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ DONALD C. HEPPERMANN</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DONALD C. HEPPERMANN</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
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  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ WILLIAM A. KELLSTROM </font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">WILLIAM A. KELLSTROM</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ ANNE E. MOUNSEY</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">ANNE E. MOUNSEY</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
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 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/S/ KAREN L. ROGERS </font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">KAREN L. ROGERS</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
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  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
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  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">WILLIAM F. WALLACE</font></p>
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  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:44.22%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;text-transform:uppercase;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="18%" rowspan="2" style="padding:0pt .7pt 0pt 0pt;width:18.08%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">APRIL 5, 2007</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="31%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:31.62%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DONALD D. WOLF</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:2.98%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:3.1%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0pt 21.6pt 12.0pt 0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>


<br><hr size="3" width="100%" noshade color="#010101" align="center">

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<p align="center" style="margin:0pt 21.6pt 12.0pt 0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT INDEX</font></b></p>

<div align="center" style="font-family:Times New Roman;">

<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse;">
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p align="left" style="font-size:8.0pt;font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:left;"><!-- SET mrlHTMLTableCenter --><!-- SET mrlNoTableShading -->Exhibit No.</p>
  </td>
  <td width="24" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="512" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Description of Exhibit</font></b></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.1</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MarkWest Hydrocarbon, Inc. 2006 Stock Incentive Plan
  (incorporated by reference to the Registrant&#146;s Definitive Proxy Statement on
  Schedule 14A (File No. 001-14841) filed on May 1, 2006 in connection with the
  Registrant&#146;s June 15, 2006 Annual Meeting of Stockholders).</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion of Hogan &amp; Hartson L.L.P. with respect
  to the legality of the common stock registered hereby.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of Hogan &amp; Hartson L.L.P.&nbsp; (contained in its opinion filed herewith as
  Exhibit 5.1).</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.2</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of Deloitte and Touche LLP, Independent
  Registered Public Accounting Firm, with respect to the Registrant.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.3</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of KPMG LLP, Independent Registered Public
  Accounting Firm, with respect to the Registrant.</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="57" valign="top" style="padding:0pt .7pt 0pt 0pt;width:42.6pt;">
  <p style="margin:0pt 0pt .0001pt 20.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">24.1</font></p>
  </td>
  <td width="24" valign="top" style="padding:0pt .7pt 0pt 0pt;width:18.0pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="512" valign="top" style="padding:0pt .7pt 0pt 0pt;width:384.1pt;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Power of Attorney (included on the signature page to
  this registration statement).</font></p>
  </td>
 </tr>
</table>

</div>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>



</div><br><hr size="3" width="100%" noshade color="#010101" align="center">

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</html>
[{"type": "S-8", "sequence": "1", "filename": "a07-2878_1s8.htm", "description": "S-8", "secsgml_size_bytes": 100085}]
{"company-data": {"conformed-name": "MARKWEST HYDROCARBON INC", "cik": "0001019756", "assigned-sic": "1311", "irs-number": "841352233", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-141935", "film-number": "07753882"}, "business-address": {"street1": "1515 ARAPAHOE STREET, TOWER 2, SUITE 700", "city": "DENVER", "state": "CO", "zip": "80202-2126", "phone": "303-925-9200"}, "mail-address": {"street1": "1515 ARAPAHOE STREET, TOWER 2, SUITE 700", "city": "DENVER", "state": "CO", "zip": "80202-2126"}}
As filed with the Securities and Exchange Commission on April 5, 2007
Registration No. 333-
UNITED
STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
MARKWEST
HYDROCARBON, INC.
(Exact name of Registrant as specified in its charter)
Delaware
84-1352233
(State or other
  jurisdiction of incorporation or organization)
(I.R.S. Employer
  Identification No.)
1515
  Arapahoe Street, Tower 2
Suite
  700, Denver, CO
80202-2102
(Address of
  Principal Executive Offices)
(Zip Code)
MarkWest
Hydrocarbon, Inc. 2006 Stock Incentive Plan
(Full title of the Plan)
C. Corwin Bromley
General Counsel
MarkWest Hydrocarbon, Inc.
1515
Arapahoe Street, Tower 2
Suite
700
Denver, Colorado 80202-2102
(303) 925-9200
(Name, address and telephone number, including area
code, of agent for service)
Copy to:
George Hagerty, Esq.
Hogan & Hartson L.L.P.
One Tabor Center, Suite 1500
1200 Seventeenth Street
Denver, Colorado 80202
(303) 899-7300
CALCULATION
OF REGISTRATION FEE
Title of securities
to be registered
Amount
to be
Registered (1)
Proposed maximum
offering price
per share (2)
Proposed maximum
aggregate offering
price (2)
Amount of
registration
fee (2)
Common Stock, par value
  $.01 per share
1,000,000
$
62.33
$
62,330,000
$
1,913.53
(1)
Pursuant to Rule 416
under the Securities Act of 1933, as amended (the "Securities Act"), this
registration statement covers, in addition to the number of shares of common
stock shown above, an indeterminate number of shares of common stock that, by
reason of certain events specified in the plan (e.g., anti-dilution
adjustments), may become subject to such plan.
(2)
Estimated solely for the
purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h)
under the Securities Act on the basis of the average of the high and low prices
reported for the Registrant's common stock on the American Stock Exchange on April
4, 2007.
PART I
INFORMATION
REQUIRED IN SECTION 10(a) PROSPECTUS
Item 1.    Plan
Information.*
Item 2.    Registrant
Information and Employee Plan Annual Information.*
*
The documents containing the information
specified in Part I will be sent or given to participants in the MarkWest
Hydrocarbon, Inc. 2006 Stock Incentive Plan (the "Plan") as specified by
Rule 428(b)(1) under the Securities Act.  Pursuant to the Note to Part I of
Form S-8, such documents will not be filed with the Securities and
Exchange Commission (the "Commission") either as part of this registration
statement or as prospectuses or prospectus supplements pursuant to
Rule 424 under the Securities Act. These documents and the documents
incorporated by reference pursuant to Item 3 of Part II of this registration
statement, taken together, constitute the prospectus that meets the
requirements by Section 10(a) of the Securities Act.
PART II
INFORMATION REQUIRED IN THE
REGISTRATION STATEMENT
Item 3.    Incorporation
of Documents by Reference.
The
following documents and all other documents subsequently filed with the
Commission by MarkWest Hydrocarbon, Inc. (the "Registrant") pursuant to
Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), prior to the filing of a post-effective amendment
that indicates that all the shares of common stock offered hereby have been
sold or that deregisters all such shares of common stock then remaining unsold,
shall be deemed incorporated by reference herein and to be a part of this
registration statement from the date of filing of such documents:
(a)           the Registrant's annual report on
Form 10-K/A for its fiscal year ended December 31, 2006, filed with the
Commission on March 22, 2007 (File No. 001-14841);
(b)           the Registrant's current reports on
Form 8-K, filed with the Commission on January 29, 2007, February 1,
2007, February 2, 2007, February 23, 2007 and March 20, 2007;
(c)           the Registrant's definitive proxy
statement on Schedule 14A filed with the Commission on May 1, 2006; and
(d)           the description of the Registrant's
common stock as set forth in the Registrant's registration statement on Form
8-A  filed with the Commission on
February 17, 1997 (File No. 001-14841).
Any
statement contained herein or in a document incorporated or deemed to be
incorporated by reference shall be deemed to be modified or superseded for
purposes of this registration statement to the extent that a statement
contained in any other subsequently filed document which also is or is deemed
to be incorporated by reference herein modifies or supersedes such prior
statement.  Any such statement so
modified or superseded shall not be deemed to constitute a part of this
registration statement, except as so modified or superseded.
Item
4.  Description of Securities.
Not applicable.
Item
5.  Interests of Named Experts and
Counsel.
Not applicable.
Item
6.  Indemnification of Officers and
Directors.
The
Registrant's certificate of incorporation provides that the Registrant shall,
to the fullest extent permitted by the laws of the State of Delaware, indemnify
any person who is or was a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative by reason of the fact that he or she
is or was a director, officer, employee or agent of the Registrant, or is or
was serving at the request of the Registrant as a director, officer, employee
or agent of or in any other capacity with another corporation, partnership,
joint venture, trust or other enterprise, against expenses (including attorneys'
fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by such person in connection with such action, suit or proceeding if
he or she acted in good faith and in a manner such person reasonably believed
to be in or not opposed to the best interests of the Registrant, and, with
respect to any criminal action or proceeding, had no reasonable cause to
believe that such person's conduct was unlawful.  The Registrant shall pay the expenses
incurred in defending a civil or criminal action, suit or proceeding against a
director of the Registrant and may pay the expenses incurred in defending a
civil or criminal action, suit or proceeding against an officer, trustee, employee
or agent of the Registrant in advance of the final disposition of such action,
suit or proceeding as authorized by the board of directors of the Registrant
upon receipt of an undertaking by or on behalf of the indemnified person to
repay such amount if it shall ultimately be determined that such person is not
entitled to be indemnified.
In
accordance with Section 102(b)(7) of the Delaware General Corporation Law (the "DCGL"),
the Registrant's certificate of incorporation provides that no director shall be
personally liable to the Registrant or any stockholder for monetary damages for
breach of fiduciary duty as a director, except (i) under Section 174 of DCGL or
any amendment thereto or successor provision thereto providing for liability of
directors for unlawful payment of dividends or unlawful stock purchases or
redemptions, (ii) for any breach of the director's duty of loyalty to the
Registrant or its stockholders, (iii) for acts or omissions of such director
not in good faith, (iv) for any acts or omissions involving intentional
misconduct or a knowing violation of law, or (v) for any transaction from which
such director received an improper benefit. 
The certificate also provides that if the DGCL is amended to authorize
corporate action further eliminating or limiting the personal liability of
directors, then the liability of a director of the Registrant shall be
eliminated or limited to the fullest extent permitted under the DGCL, as so
amended.  In addition, the Registrant's
certificate of incorporation also provides that the Registrant shall have the
power to purchase and maintain insurance on behalf of any person who is or was
a director, officer, employee or agent of the Registrant, or is or was serving
at the request of the Registrant as a director, officer, employee or agent of
another corporation, partnership, joint venture, trust or other enterprise
against any liability asserted against such person and incurred by such person
in any such capacity, or arising out of such person's status as such, whether
or not Registrant would have the power to indemnify such person under the
indemnification provisions of the Registrant's certificate of incorporation.
The
Registrant's bylaws provide that the Registrant shall indemnify such person for
such liabilities in such manner under such circumstances, and to such extent,
as permitted by the Registrant's certificate of incorporation and by Section
145 of the DGCL as in effect at the time the bylaws were adopted or as
subsequently amended.  The bylaws also
provide that the Registrant's board of directors may authorize the purchase and
maintenance of insurance and/or the execution of individual agreements for the
purpose of such indemnification, and the Registrant shall advance all
reasonable costs and expenses (including attorney's fees) incurred in defending
any action, suit or proceeding to all persons entitled to indemnification under
the bylaws, in the manner, under the circumstances and to the extent permitted
by the Registrant's certificate of incorporation and Section 145 of the
DGCL.  In accordance with the bylaws, the
Registrant has entered into indemnification agreeements with certain directors
and officers.
Section
145 of the DGCL provides that a corporation has the power to indemnify a
director, officer, employee or agent of the corporation and certain other
persons serving at the request of the corporation in related capacities against
amounts paid and expenses incurred in connection with an action, suit or
proceeding to which such person is or threatened to be made a party by reason
of such position, if such person shall have acted in good faith and in a manner
he reasonably believed to be in or not opposed to the best interests of the
corporation, and, in any criminal proceeding, if such person had no reasonable
cause to believe the conduct was unlawful; provided that, in the case of
actions brought by or in the right of
the corporation,
no indemnification shall be made with respect to any matter as to which such
person shall have been adjudged to be liable to the corporation unless and only
to the extent that the adjudicating court determines that such person is fairly
and reasonably entitled to indemnification or as a court deems proper.
In
addition, the Registrant maintains insurance to cover its directors, officers
and, in certain circumstances, its employees against liability incurred while
acting on behalf of the Registrant.
Item
7.  Exemption from Registration Claimed.
Not applicable.
Item 8.    Exhibits.
Exhibit No.
Description of Exhibit
4.1
MarkWest Hydrocarbon, Inc. 2006 Stock Incentive Plan
  (incorporated by reference to the Registrant's Definitive Proxy Statement on
  Schedule 14A (File No. 001-14841) filed on May 1, 2006 in connection with the
  Registrant's June 15, 2006 Annual Meeting of Stockholders).
5.1
Opinion of Hogan & Hartson L.L.P. with respect
  to the legality of the common stock registered hereby.
23.1
Consent of Hogan & Hartson L.L.P. (contained in
  its opinion filed herewith as Exhibit 5.1).
23.2
Consent of Deloitte & Touche LLP, Independent
  Registered Public Accounting Firm, with respect to the Registrant.
23.3
Consent of KPMG LLP, Independent Registered Public
  Accounting Firm, with respect to the Registrant.
24.1
Power of Attorney (included on the signature page to
  this registration statement).
Item 9. Undertakings.
(a)  The
undersigned Registrant hereby undertakes:
(1)  To file, during any period
in which offers or sale are being made, a post-effective amendment to this registration
statement:
(i)  To include
any prospectus required by Section 10(a)(3) of the Securities Act;
(ii)  To reflect
in the prospectus any facts or events arising after the effective date of registration
statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the
information set forth in registration statement - notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume
and price represent no more than a 20% change in the maximum aggregate offering
price set forth in the "Calculation of Registration Fee" table in the effective
registration statement; and
(iii)  To
include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to
such information in the registration statement.
Provided, however
, that
paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in reports filed with or furnished to the Commission by
the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that
are incorporated by reference in this registration statement.
(2)  That, for the purpose of
determining any liability under the Securities Act, each such post-effective
amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial
bona fide
offering
thereof.
(3)  To remove from registration
by means of a post-effective amendment any of the securities being registered
which remain unsold at the termination of the offering.
(b)  The
undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act, each filing of the Registrant's annual
report pursuant to Section 13(a) or Section 15(d) of the Exchange Act that is
incorporated by reference in this registration statement shall be deemed to be
a new registration statement relating to the securities offered therein, and
the offering of such securities at that time shall be deemed to be the initial
bona fide
offering thereof.
(c)  Insofar as
indemnification for liabilities arising under the Securities Act may be
permitted to directors, officers and controlling persons of the Registrant
pursuant to the foregoing provisions, or otherwise, the Registrant has been
advised that in the opinion of the Commission such indemnification is against
public policy as expressed in the Securities Act and is, therefore,
unenforceable.  In the event that a claim
for indemnification against such liabilities (other than for the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of competent jurisdiction the question of whether
such indemnification by it is against public policy as expressed by the
Securities Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act of
1933, as amended, the Registrant certifies that it has reasonable grounds to
believe that it meets all of the requirements for filing on Form S-8 and has
duly caused this registration statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Denver, State of
Colorado, on this 5
th
day of April, 2007.
MARKWEST HYDROCARBON, INC.
By:
/s/ Frank M. Semple
Name:
Frank M. Semple
Title:
President and Chief Executive Officer
KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints each of Frank M. Semple and Nancy K. Buese,
jointly and severally, each in his or her own capacity, his or her true and
lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, to sign, execute and file with the Commission (or any other
governmental or regulatory authority), for us and in our names in the
capacities indicated below, this registration statement on Form S-8 (including
all amendments thereto) with all exhibits and any and all documents required to
be filed with respect thereto, granting unto said attorneys-in-fact and agents
and each of them, full power and authority to do and to perform each and every
act and thing necessary or desirable to be done in and about the premises in
order to effectuate the same as fully to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or any of them, may lawfully
do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, as amended,
this registration statement has been signed by the following persons in the
capacities and on the dates indicated.
Signature
title
Date
/S/ FRANK M. SEMPLE
President, Chief Executive Officer and
APRIL 5, 2007
FRANK M. SEMPLE
Director
(Principal Executive Officer)
/S/ NANCY K. BUESE
Senior Vice President, CHIEF FINANCIAL
APRIL 5, 2007
NANCY K. BUESE
OFFICER (Principal Financial Officer
and principal Accounting officer)
Chairman of the Board of Directors
APRIL 5, 2007
JOHN M. FOX
/S/ MICHAEL L. BEATTY
Director
APRIL 5, 2007
MICHAEL L. BEATTY
/S/ DONALD C. HEPPERMANN
Director
APRIL 5, 2007
DONALD C. HEPPERMANN
/S/ WILLIAM A. KELLSTROM
Director
APRIL 5, 2007
WILLIAM A. KELLSTROM
/S/ ANNE E. MOUNSEY
Director
APRIL 5, 2007
ANNE E. MOUNSEY
/S/ KAREN L. ROGERS
Director
APRIL 5, 2007
KAREN L. ROGERS
Director
APRIL 5, 2007
WILLIAM F. WALLACE
Director
APRIL 5, 2007
DONALD D. WOLF
EXHIBIT INDEX
Exhibit No.
Description of Exhibit
4.1
MarkWest Hydrocarbon, Inc. 2006 Stock Incentive Plan
  (incorporated by reference to the Registrant's Definitive Proxy Statement on
  Schedule 14A (File No. 001-14841) filed on May 1, 2006 in connection with the
  Registrant's June 15, 2006 Annual Meeting of Stockholders).
5.1
Opinion of Hogan & Hartson L.L.P. with respect
  to the legality of the common stock registered hereby.
23.1
Consent of Hogan & Hartson L.L.P.  (contained in its opinion filed herewith as
  Exhibit 5.1).
23.2
Consent of Deloitte and Touche LLP, Independent
  Registered Public Accounting Firm, with respect to the Registrant.
23.3
Consent of KPMG LLP, Independent Registered Public
  Accounting Firm, with respect to the Registrant.
24.1
Power of Attorney (included on the signature page to
  this registration statement).