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    <title>
      Form S-8 2006 Director Plan dated 5/18/06
</title>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>As
      filed with the Securities and Exchange Commission on May 18,
      2006</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Registration
      No. 333-_____</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">
      <div>
        <hr style="COLOR: black" align="left" noshade size="1" width="100%">
      </div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>UNITED
      STATES</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SECURITIES
      AND EXCHANGE COMMISSION</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Washington,
      D.&#160;C. 20549</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>_____________________________________________</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>FORM
      S-8</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>REGISTRATION
      STATEMENT UNDER</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>THE
      SECURITIES ACT OF 1933</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>_____________________________________________</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>INSITUFORM
      TECHNOLOGIES, INC.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Exact
      name of registrant as specified in its charter)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>DELAWARE</strong></font></div>
            </td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>702
                Spirit 40 Park Drive</strong></font></div>
            </td>
            <td valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>13-3032158</strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(State
                or other jurisdiction of</font></div>
            </td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Chesterfield,
                Missouri 63005</strong></font></div>
            </td>
            <td valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(I.R.S.
                Employer</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">incorporation
                or organization)</font></div>
            </td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>(636)
                530-8000</strong></font></div>
            </td>
            <td valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Identification
                No.)</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Address
                of Principal Executive Offices)</font></div>
            </td>
            <td align="left" valign="top" width="21%">&#160;</td>
          </tr>

      </table>
    </div>
    <div>&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>INSITUFORM
      TECHNOLOGIES, INC.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>2006
      NON-EMPLOYEE DIRECTOR EQUITY INCENTIVE PLAN</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Full
      title of the plan)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>DAVID
      F. MORRIS</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Vice-President,
      General Counsel and Secretary</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Insituform
      Technologies, Inc.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>702
      Spirit 40 Park Drive</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Chesterfield,
      Missouri 63005</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>(636)
      530-8000</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Name,
      address and telephone number,</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">including
      area code, of agent for service)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Copy
      to:</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>ROBERT
      M. LAROSE, ESQ.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Thompson
      Coburn LLP</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>One
      US Bank Plaza</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>St.
      Louis, Missouri 63101</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Telephone:
      (314) 552-6000</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Facsimile:
      (314) 552-7000</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 288pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>CALCULATION
      OF REGISTRATION FEE</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" id="ftable" width="100%">

          <tr>
            <td valign="bottom" width="43%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Title
                of each class of </strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>securities
                to be registered</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td width="2%" style="border-bottom: #ffffff thin solid;">&#160;</td>
            <td colspan="2" valign="bottom" width="12%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Amount
                to be registered</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff thin solid;">&#160;</td>
            <td colspan="2" valign="bottom" width="12%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Proposed
                maximum offering price per share</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup><strong>(2)</strong></sup></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff thin solid;">&#160;</td>
            <td colspan="2" valign="bottom" width="12%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Proposed
                maximum aggregate offering price </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup><strong>(2)</strong></sup></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff thin solid;">&#160;</td>
            <td colspan="2" valign="bottom" width="11%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Amount
                of registration fee</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: #ffffff thin solid;">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="43%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Insituform
                Technologies, Inc. Class A Common Stock, $0.01 par value </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup>(1)</sup></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td width="2%" style="border-bottom: #ffffff solid;">&#160;</td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: black double;">&#160;</td>
            <td align="right" valign="bottom" width="11%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">200,000</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff solid;">&#160;</td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">$</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="right" valign="bottom" width="11%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">28.34</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff solid;">&#160;</td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">$</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="right" valign="bottom" width="11%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">5,668,000</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="left" valign="bottom" width="2%" style="border-bottom: #ffffff solid;">&#160;</td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">$</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="right" valign="bottom" width="11%" style="border-bottom: black double;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; MARGIN-RIGHT: 0px; FONT-FAMILY: Times New Roman">606.48</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0px; TEXT-INDENT: 0px; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0px">
              </div>
            </td>
            <td align="left" valign="bottom" width="1%" style="border-bottom: #ffffff solid;">&#160;</td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 34.85pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 34.85pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup>(1)</sup></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Includes
      one attached Preferred Share Purchase Right per share.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 34.85pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 34.85pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup>(2)</sup></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Estimated
      solely for the purposes of computing the Registration Fee pursuant to the
      provisions of Rule 457(c) and (h), based upon the average of the high and low
      sale prices of Class A common stock, $0.01 par value, of the Registrant as
      reported on the Nasdaq National Market on May 11, 2006.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 34.55pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div style="WIDTH: 100%" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
        </div>
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
        <div style="WIDTH: 100%" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="right"><br></div>
        </div>
      </div>
    </div><br><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      undersigned registrant, Insituform Technologies, Inc. (the &#8220;Registrant&#8221;), hereby
      files this Registration Statement on Form&#160;S-8 (this &#8220;Registration
      Statement&#8221;) to register two hundred thousand (200,000) shares of the
      Registrant&#8217;s Class A common stock, $0.01 par value (&#8220;Common Stock&#8221;), and
      attached Preferred Share Purchase Rights, for issuance to participants under
      the
      Insituform Technologies, Inc. 2006 Non-Employee Director Equity Incentive Plan
      (the &#8220;Plan&#8221;).</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>PART
      II</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
      3.
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Incorporation
      of Certain Documents by Reference</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      following documents filed by the Registrant with the Securities and Exchange
      Commission are incorporated herein by reference:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div align="left">
      <table border="0" cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(i)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                Registrant&#8217;s Annual Report on Form 10-K for the year ended December 31,
                2005;</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(ii)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                Registrant&#8217;s Quarterly Report on Form 10-Q for the quarter ended March 31,
                2006; </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(iii)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                Registrant&#8217;s Definitive Proxy Statement on Schedule 14A filed on March 10,
                2006; </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(iv)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                Registrant&#8217;s Current Reports on Form 8-K filed on </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">January
                3, 2006, January 11, 2006, February 21, 2006, </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">March
                1, 2006, April 14, 2006, and May 1, 2006;</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(v)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                description of the Registrant&#8217;s Class A Common Stock set forth in the
                Registrant&#8217;s Registration Statement filed pursuant to Section 12 of the
                Securities Exchange Act of 1934, including any amendments or reports
                filed
                for the purpose of updating such description; and</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="7%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(vi)</font></div>
            </td>
            <td align="justify" valign="top" width="62%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
                description of the Preferred Share Purchase Rights attached to each
                share
                of the Registrant&#8217;s Class A common stock contained in the Registrant&#8217;s
                Registration Statement on Form 8-A, filed on March 8, 2002, and any
                amendment or report filed for the purposes of updating such
                description.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Such
      incorporation by reference shall not be deemed to incorporate by reference
      the
      information referred to in Item&#160;402(a)(8) of Regulation S-K.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">All
      documents filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d)
      of the Securities Exchange Act of 1934, as amended, after the date of this
      Registration Statement and prior to the filing of a post-effective amendment
      which indicates that all securities offered hereby have been sold or which
      deregisters all securities remaining unsold, shall be deemed to be incorporated
      by reference in this Registration Statement and to be made a part hereof from
      the date of filing of such documents. Any statements contained herein or in
      a
      document incorporated herein by reference shall be deemed to be modified or
      superseded for purposes of this Registration Statement to the extent that a
      statement contained in a subsequently filed document incorporated herein by
      reference modifies or supersedes such document. Any statement so modified or
      superseded shall not be deemed, except as so modified or superseded, to
      constitute a part of this Registration Statement.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Where
      any
      document or part thereof is incorporated by reference in this Registration
      Statement, the Company will provide without charge to each person to whom a
      Prospectus with respect to the Plan is delivered, upon written or oral request
      of such person, a copy of any and all of the information incorporated by
      reference in this Registration Statement, excluding exhibits unless such
      exhibits are specifically incorporated by reference.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
      6.
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Indemnification
      of Directors and Officers</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Section
      102 of the Delaware General Corporation Law allows a corporation to limit
      directors' personal liability to the corporation or its stockholders from
      monetary damages for breach of fiduciary duty as a director, with certain
      exceptions. Paragraph Tenth of the Company's Restated Certificate of
      Incorporation, as amended, provides that a director of the Company shall not
      be
      personally liable to the Company or its stockholders for monetary damages for
      breach of fiduciary duty as a director, except for liability (i) for any breach
      of the director's duty of loyalty to the Company or its stockholders, (ii)
      for
      acts or omissions not in good faith or which involve intentional misconduct
      or a
      knowing violation of law, (iii) for unlawful payment of dividends or for
      unlawful stock purchase or redemption of the corporation's stock under Section
      174 of the Delaware General Corporation Law, (iv) for any transaction from
      which
      the director derived an improper personal benefit or (v) for any act or omission
      occurring prior to the date Paragraph Tenth became effective. </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Section
      145 of the Delaware General Corporation Law permits a corporation, subject
      to
      the standards set forth therein, to indemnify any person in connection with
      any
      action, suit or proceeding brought or threatened by reason of the fact that
      such
      person is or was a director, officer, employee or agent of the corporation
      or is
      or was serving as such with respect to another entity at the request of the
      corporation. The Registrant's Restated Certificate of Incorporation, as amended,
      provides for full indemnification of its directors and officers to the extent
      permitted by Section 145. </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In
      addition to the provisions in its Restated Certificate of Incorporation, as
      amended, the Company has taken such other steps as are reasonably necessary
      to
      effect its indemnification policy. Included among such other steps is liability
      insurance provided by the Company for its directors and officers for certain
      losses arising from claims or charges made against them in their capacities
      as
      directors or officers of the Company. The Company has also entered into
      indemnification agreements with individual directors. These agreements generally
      provide such directors with a contractual right of indemnification to the full
      extent provided by applicable law and the charter documents of the Company
      as in
      effect at the respective dates of such agreements.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Insofar
      as indemnification for liabilities arising under the Securities Act of 1933
      may
      be permitted to directors, officers or persons controlling the Registrant
      pursuant to the foregoing provisions, the Registrant has been informed that
      in
      the opinion of the Securities and Exchange Commission such indemnification
      is
      against public policy as expressed in the Securities Act of 1933 and is
      therefore unenforceable. In the event that a claim for indemnification against
      such liabilities (other than 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 appropriate
      jurisdiction the question whether such indemnification by it is against public
      policy as expressed in the Securities Act and will be governed against public
      policy as expressed in the Securities Act and will be governed by the final
      adjudication of such issue.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
      8.
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Exhibits</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">See
      Exhibit Index on page 8 hereof.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
      9.
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Undertakings</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(a)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      undersigned registrant hereby undertakes:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(1)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
      file,
      during any period in which offers and sales are being made, a post-effective
      amendment to this registration statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(i)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
      include any prospectus required by Section 10(a)(3) of the Securities Act of
      1933;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(ii)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
      reflect in the prospectus any facts or events arising after the effective date
      of the 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 the registration statement;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(iii)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
      include any material information with respect to the plan of distribution
      previously disclosed in the registration statement or any material change to
      such information in the registration statement;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">provided,
      however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
      registration statement is on Form S-3, Form S-8 or Form F-3, and the information
      required to be included in a post-effective amendment by those paragraphs is
      contained in periodic reports filed with or furnished to the Commission by
      the
      registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange
      Act of 1934 that are incorporated by reference in the registration
      statement.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(2)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">That,
      for
      the purpose of determining any liability under the Securities Act of 1933,
      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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(3)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      undersigned registrant hereby undertakes that, for purposes of determining
      any
      liability under the Securities Act of 1933, each filing of the registrant&#8217;s
      annual report pursuant to Section 13(a) or Section 15(d) of the Securities
      Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
      plan&#8217;s annual report pursuant to Section 15(d) of the Securities Exchange Act of
      1934) that is incorporated by reference in the 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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Insofar
      as indemnification for liabilities arising under the Securities Act of 1933
      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 Securities and Exchange Commission such
      indemnification is against public policy as expressed in the Act and is,
      therefore, unenforceable. In the event that a claim for indemnification against
      such liabilities (other than 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 appropriate
      jurisdiction the question whether such indemnification by it is against public
      policy as expressed in the Act and will be governed by the final adjudication
      of
      such issue.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div style="WIDTH: 100%" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
        </div>
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
        <div style="WIDTH: 100%" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="right"><br></div>
        </div>
      </div>
    </div><br><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SIGNATURES</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>The
      Registrant</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">.
      Pursuant to the requirements of the Securities Act of 1933, the Registrant
      certifies that it has reasonable grounds to believe that it meets all of the
      requirements for filing on Form&#160;S-8 and has duly caused this Registration
      Statement to be signed on its behalf by the undersigned, thereunto duly
      authorized, in the County of St. Louis, State of Missouri, on May 18,
      2006.</font><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 216pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 216pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div align="left">
      <table border="0" cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="justify" valign="top" width="40%" style="border-bottom: medium none;">&#160;</td>
            <td align="justify" valign="top" width="40%" style="border-bottom: medium none;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">INSITUFORM
                TECHNOLOGIES, INC.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font size="2"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By<u>&#160;&#160;
                /s/ Thomas S. Rooney, Jr.</u></font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Thomas
                  S. Rooney, Jr.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">President
                  and Chief Executive Officer</font></div>
              </div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>POWER
      OF ATTORNEY</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Each
      person whose signature appears below hereby constitutes and appoints Thomas
      S.
      Rooney, Jr., and David F. Morris, and each of them, the undersigned&#8217;s true and
      lawful attorneys-in-fact and agents, with full power of substitution and
      resubstitution, for the undersigned and in the undersigned&#8217;s name, place and
      stead, in any and all capacities, to sign any and all amendments (including
      post-effective amendments) to this Registration Statement on Form S-8 with
      respect to the Insituform Technologies, Inc. 2006 Non-Employee Director Equity
      Incentive Plan, and to file the same, with exhibits and any and all other
      documents filed with respect thereto, with the Securities and Exchange
      Commission (or any other governmental or regulatory authority), 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 requisite and necessary to be
      done in ratifying and confirming all that said attorneys-in-fact and agents,
      or
      any of them, or their substitute or substitutes may lawfully do or cause to
      be
      done by virtue hereof.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
      to the requirements of the Securities Act of 1933, this Registration Statement
      has been signed by the following persons in the capacities and on the date
      indicated.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="justify" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong><u>Signature</u></strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Thomas S. Rooney, Jr.</font></div>
              </div>
            </td>
            <td valign="top" width="27%" style="border-bottom: #ffffff thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong><u>Title</u></strong></font></div>
            </td>
            <td valign="top" width="27%" style="border-bottom: #ffffff thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong><u>Date</u></strong></font></div>
            </td>
          </tr>
          <tr>
            <td align="justify" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Thomas
                S. Rooney, Jr.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  David A. Martin</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">President,
                Chief Executive Officer and Director</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Principal
                Executive Officer)</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">David
                A. Martin</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Alfred L. Woods</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
                President and Controller</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Principal
                Financial and Accounting Officer)</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Alfred
                L. Woods</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Stephen P. Cortinovis</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Stephen
                P. Cortinovis</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Stephanie A. Cuskley</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Stephanie
                A. Cuskley</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  John P. Dubinsky</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">John
                P. Dubinsky</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Juanita H. Hinshaw</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Juanita
                H. Hinshaw</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Alfred T. McNeill</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Alfred
                T. McNeill</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Sheldon Weinig</font></div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%" style="border-bottom: #ffffff thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Sheldon
                Weinig</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Director</font></div>
            </td>
            <td valign="top" width="27%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">May
                18, 2006</font></div>
            </td>
          </tr>

      </table>
    </div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
      </div>
    </div><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong><u>EXHIBIT
      INDEX</u></strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="11%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Exhibit
                No.</strong></font></div>
            </td>
            <td valign="top" width="69%">&#160;</td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.1</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Restated
                Certificate of Incorporation of the Registrant, as amended through
                April
                27, 2005 (incorporated by reference to Appendix A to the Registrant&#8217;s
                Proxy Statement on Schedule 14A (File No. 000-10786) filed by the
                Registrant on March 24, 2005), and Certificate of Designation, Preferences
                and Rights of Series A Junior Participating Preferred Stock (incorporated
                by reference to Exhibit 3.1 to the Registrant&#8217;s Annual Report on Form 10-K
                for the year ended December 31, 2001), and incorporated herein by
                reference.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.2</font></div>
            </td>
            <td align="left" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Amended
                and Restated By-Laws of the Registrant, as amended through October
                25,
                2005 (incorporated by reference to Exhibit 3.1 to the Registrant&#8217;s Current
                Report on Form 8-K filed by the Registrant on October 31, 2005),
                and
                incorporated herein by reference.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.3</font></div>
            </td>
            <td align="left" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Rights
                Agreement dated as of February 26, 2002 between Insituform Technologies,
                Inc. and American Stock Transfer &amp; Trust Company (incorporated by
                reference to Exhibit 1 to the Registrant&#8217;s Registration Statement on Form
                8-A filed by the Registrant on March 8, 2002), and incorporated herein
                by
                reference.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">5.1*</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Opinion
                of Thompson Coburn LLP as to the legality of the securities being
                registered.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">23.1*</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Consent
                of PricewaterhouseCoopers LLP.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">23.2*</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Consent
                of Thompson Coburn LLP (included in Exhibit 5.1).</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">24.1*</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Power
                of Attorney (set forth on signature page hereto).</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="11%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.1</font></div>
            </td>
            <td align="justify" valign="top" width="69%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Insituform
                Technologies, Inc. 2006 Non-Employee Director Equity Incentive Plan
                (incorporated by reference to Appendix B to the Registrant&#8217;s Proxy
                Statement on Schedule 14A (File No. 000-10786), filed by the Registrant
                on
                March 10, 2006), and incorporated herein by
                reference.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">*
      Filed
      herewith.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div style="WIDTH: 100%" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
        </div>
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
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[{"type": "S-8", "sequence": "1", "filename": "s805182006dirplan.htm", "description": "FORM S-8 2006 DIRECTOR PLAN DATED 5/18/06", "secsgml_size_bytes": 92402}]
{"company-data": {"conformed-name": "INSITUFORM TECHNOLOGIES INC", "cik": "0000353020", "assigned-sic": "1623", "irs-number": "133032158", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-134251", "film-number": "06852624"}, "business-address": {"street1": "702 SPIRIT 40 PARK DRIVE", "city": "CHESTERFIELD", "state": "MO", "zip": "63005", "phone": "6365308000"}, "mail-address": {"street1": "702 SPIRIT 40 PARK DRIVE", "city": "CHESTERFIELD", "state": "MO", "zip": "63005"}, "former-company": [{"former-conformed-name": "INSITUFORM OF NORTH AMERICA INC/TN/", "date-changed": "19930617"}, {"former-conformed-name": "INSITUFORM OF NORTH AMERICA INC", "date-changed": "19921217"}]}
Form S-8 2006 Director Plan dated 5/18/06
As
      filed with the Securities and Exchange Commission on May 18,
      2006
Registration
      No. 333-_____
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
Washington,
      D. C. 20549
_____________________________________________
FORM
      S-8
REGISTRATION
      STATEMENT UNDER
THE
      SECURITIES ACT OF 1933
_____________________________________________
INSITUFORM
      TECHNOLOGIES, INC.
(Exact
      name of registrant as specified in its charter)
DELAWARE
702
                Spirit 40 Park Drive
13-3032158
(State
                or other jurisdiction of
Chesterfield,
                Missouri 63005
(I.R.S.
                Employer
incorporation
                or organization)
(636)
                530-8000
Identification
                No.)
(Address
                of Principal Executive Offices)
INSITUFORM
      TECHNOLOGIES, INC.
2006
      NON-EMPLOYEE DIRECTOR EQUITY INCENTIVE PLAN
(Full
      title of the plan)
DAVID
      F. MORRIS
Vice-President,
      General Counsel and Secretary
Insituform
      Technologies, Inc.
702
      Spirit 40 Park Drive
Chesterfield,
      Missouri 63005
(636)
      530-8000
(Name,
      address and telephone number,
including
      area code, of agent for service)
Copy
      to:
ROBERT
      M. LAROSE, ESQ.
Thompson
      Coburn LLP
One
      US Bank Plaza
St.
      Louis, Missouri 63101
Telephone:
      (314) 552-6000
Facsimile:
      (314) 552-7000
CALCULATION
      OF REGISTRATION FEE
Title
                of each class of
securities
                to be registered
Amount
                to be registered
Proposed
                maximum offering price per share
(2)
Proposed
                maximum aggregate offering price
(2)
Amount
                of registration fee
Insituform
                Technologies, Inc. Class A Common Stock, $0.01 par value
(1)
200,000
$
28.34
$
5,668,000
$
606.48
(1)
Includes
      one attached Preferred Share Purchase Right per share.
(2)
Estimated
      solely for the purposes of computing the Registration Fee pursuant to the
      provisions of Rule 457(c) and (h), based upon the average of the high and low
      sale prices of Class A common stock, $0.01 par value, of the Registrant as
      reported on the Nasdaq National Market on May 11, 2006.
The
      undersigned registrant, Insituform Technologies, Inc. (the "Registrant"), hereby
      files this Registration Statement on Form S-8 (this "Registration
      Statement") to register two hundred thousand (200,000) shares of the
      Registrant's Class A common stock, $0.01 par value ("Common Stock"), and
      attached Preferred Share Purchase Rights, for issuance to participants under
      the
      Insituform Technologies, Inc. 2006 Non-Employee Director Equity Incentive Plan
      (the "Plan").
PART
      II
INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT
Item
      3.
Incorporation
      of Certain Documents by Reference
.
The
      following documents filed by the Registrant with the Securities and Exchange
      Commission are incorporated herein by reference:
(i)
The
                Registrant's Annual Report on Form 10-K for the year ended December 31,
                2005;
(ii)
The
                Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31,
                2006;
(iii)
The
                Registrant's Definitive Proxy Statement on Schedule 14A filed on March 10,
                2006;
(iv)
The
                Registrant's Current Reports on Form 8-K filed on
January
                3, 2006, January 11, 2006, February 21, 2006,
March
                1, 2006, April 14, 2006, and May 1, 2006;
(v)
The
                description of the Registrant's Class A Common Stock set forth in the
                Registrant's Registration Statement filed pursuant to Section 12 of the
                Securities Exchange Act of 1934, including any amendments or reports
                filed
                for the purpose of updating such description; and
(vi)
The
                description of the Preferred Share Purchase Rights attached to each
                share
                of the Registrant's Class A common stock contained in the Registrant's
                Registration Statement on Form 8-A, filed on March 8, 2002, and any
                amendment or report filed for the purposes of updating such
                description.
Such
      incorporation by reference shall not be deemed to incorporate by reference
      the
      information referred to in Item 402(a)(8) of Regulation S-K.
All
      documents filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d)
      of the Securities Exchange Act of 1934, as amended, after the date of this
      Registration Statement and prior to the filing of a post-effective amendment
      which indicates that all securities offered hereby have been sold or which
      deregisters all securities remaining unsold, shall be deemed to be incorporated
      by reference in this Registration Statement and to be made a part hereof from
      the date of filing of such documents. Any statements contained herein or in
      a
      document incorporated herein by reference shall be deemed to be modified or
      superseded for purposes of this Registration Statement to the extent that a
      statement contained in a subsequently filed document incorporated herein by
      reference modifies or supersedes such document. Any statement so modified or
      superseded shall not be deemed, except as so modified or superseded, to
      constitute a part of this Registration Statement.
Where
      any
      document or part thereof is incorporated by reference in this Registration
      Statement, the Company will provide without charge to each person to whom a
      Prospectus with respect to the Plan is delivered, upon written or oral request
      of such person, a copy of any and all of the information incorporated by
      reference in this Registration Statement, excluding exhibits unless such
      exhibits are specifically incorporated by reference.
Item
      6.
Indemnification
      of Directors and Officers
.
Section
      102 of the Delaware General Corporation Law allows a corporation to limit
      directors' personal liability to the corporation or its stockholders from
      monetary damages for breach of fiduciary duty as a director, with certain
      exceptions. Paragraph Tenth of the Company's Restated Certificate of
      Incorporation, as amended, provides that a director of the Company shall not
      be
      personally liable to the Company or its stockholders for monetary damages for
      breach of fiduciary duty as a director, except for liability (i) for any breach
      of the director's duty of loyalty to the Company or its stockholders, (ii)
      for
      acts or omissions not in good faith or which involve intentional misconduct
      or a
      knowing violation of law, (iii) for unlawful payment of dividends or for
      unlawful stock purchase or redemption of the corporation's stock under Section
      174 of the Delaware General Corporation Law, (iv) for any transaction from
      which
      the director derived an improper personal benefit or (v) for any act or omission
      occurring prior to the date Paragraph Tenth became effective.
Section
      145 of the Delaware General Corporation Law permits a corporation, subject
      to
      the standards set forth therein, to indemnify any person in connection with
      any
      action, suit or proceeding brought or threatened by reason of the fact that
      such
      person is or was a director, officer, employee or agent of the corporation
      or is
      or was serving as such with respect to another entity at the request of the
      corporation. The Registrant's Restated Certificate of Incorporation, as amended,
      provides for full indemnification of its directors and officers to the extent
      permitted by Section 145.
In
      addition to the provisions in its Restated Certificate of Incorporation, as
      amended, the Company has taken such other steps as are reasonably necessary
      to
      effect its indemnification policy. Included among such other steps is liability
      insurance provided by the Company for its directors and officers for certain
      losses arising from claims or charges made against them in their capacities
      as
      directors or officers of the Company. The Company has also entered into
      indemnification agreements with individual directors. These agreements generally
      provide such directors with a contractual right of indemnification to the full
      extent provided by applicable law and the charter documents of the Company
      as in
      effect at the respective dates of such agreements.
Insofar
      as indemnification for liabilities arising under the Securities Act of 1933
      may
      be permitted to directors, officers or persons controlling the Registrant
      pursuant to the foregoing provisions, the Registrant has been informed that
      in
      the opinion of the Securities and Exchange Commission such indemnification
      is
      against public policy as expressed in the Securities Act of 1933 and is
      therefore unenforceable. In the event that a claim for indemnification against
      such liabilities (other than 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 appropriate
      jurisdiction the question whether such indemnification by it is against public
      policy as expressed in the Securities Act and will be governed against public
      policy as expressed in the Securities Act and will be governed by the final
      adjudication of such issue.
Item
      8.
Exhibits
.
See
      Exhibit Index on page 8 hereof.
Item
      9.
Undertakings
.
(a)
The
      undersigned registrant hereby undertakes:
(1)
To
      file,
      during any period in which offers and sales 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 of
      1933;
(ii)
To
      reflect in the prospectus any facts or events arising after the effective date
      of the 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 the registration statement;
(iii)
To
      include any material information with respect to the plan of distribution
      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) do not apply if the
      registration statement is on Form S-3, Form S-8 or Form F-3, and the information
      required to be included in a post-effective amendment by those paragraphs is
      contained in periodic reports filed with or furnished to the Commission by
      the
      registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange
      Act of 1934 that are incorporated by reference in the registration
      statement.
(2)
That,
      for
      the purpose of determining any liability under the Securities Act of 1933,
      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 of 1933, each filing of the registrant's
      annual report pursuant to Section 13(a) or Section 15(d) of the Securities
      Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
      plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
      1934) that is incorporated by reference in the 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 of 1933
      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 Securities and Exchange Commission such
      indemnification is against public policy as expressed in the Act and is,
      therefore, unenforceable. In the event that a claim for indemnification against
      such liabilities (other than 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 appropriate
      jurisdiction the question whether such indemnification by it is against public
      policy as expressed in the Act and will be governed by the final adjudication
      of
      such issue.
SIGNATURES
The
      Registrant
.
      Pursuant to the requirements of the Securities Act of 1933, 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 County of St. Louis, State of Missouri, on May 18,
      2006.
INSITUFORM
                TECHNOLOGIES, INC.
By
/s/ Thomas S. Rooney, Jr.
Thomas
                  S. Rooney, Jr.
President
                  and Chief Executive Officer
POWER
      OF ATTORNEY
Each
      person whose signature appears below hereby constitutes and appoints Thomas
      S.
      Rooney, Jr., and David F. Morris, and each of them, the undersigned's true and
      lawful attorneys-in-fact and agents, with full power of substitution and
      resubstitution, for the undersigned and in the undersigned's name, place and
      stead, in any and all capacities, to sign any and all amendments (including
      post-effective amendments) to this Registration Statement on Form S-8 with
      respect to the Insituform Technologies, Inc. 2006 Non-Employee Director Equity
      Incentive Plan, and to file the same, with exhibits and any and all other
      documents filed with respect thereto, with the Securities and Exchange
      Commission (or any other governmental or regulatory authority), 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 requisite and necessary to be
      done in ratifying and confirming all that said attorneys-in-fact and agents,
      or
      any of them, or their substitute or substitutes may lawfully do or cause to
      be
      done by virtue hereof.
Pursuant
      to the requirements of the Securities Act of 1933, this Registration Statement
      has been signed by the following persons in the capacities and on the date
      indicated.
Signature
/s/
                  Thomas S. Rooney, Jr.
Title
Date
Thomas
                S. Rooney, Jr.
/s/
                  David A. Martin
President,
                Chief Executive Officer and Director
(
Principal
                Executive Officer)
May
                18, 2006
David
                A. Martin
/s/
                  Alfred L. Woods
Vice
                President and Controller
(
Principal
                Financial and Accounting Officer)
May
                18, 2006
Alfred
                L. Woods
/s/
                  Stephen P. Cortinovis
Director
May
                18, 2006
Stephen
                P. Cortinovis
/s/
                  Stephanie A. Cuskley
Director
May
                18, 2006
Stephanie
                A. Cuskley
/s/
                  John P. Dubinsky
Director
May
                18, 2006
John
                P. Dubinsky
/s/
                  Juanita H. Hinshaw
Director
May
                18, 2006
Juanita
                H. Hinshaw
/s/
                  Alfred T. McNeill
Director
May
                18, 2006
Alfred
                T. McNeill
/s/
                  Sheldon Weinig
Director
May
                18, 2006
Sheldon
                Weinig
Director
May
                18, 2006
EXHIBIT
      INDEX
Exhibit
                No.
4.1
Restated
                Certificate of Incorporation of the Registrant, as amended through
                April
                27, 2005 (incorporated by reference to Appendix A to the Registrant's
                Proxy Statement on Schedule 14A (File No. 000-10786) filed by the
                Registrant on March 24, 2005), and Certificate of Designation, Preferences
                and Rights of Series A Junior Participating Preferred Stock (incorporated
                by reference to Exhibit 3.1 to the Registrant's Annual Report on Form 10-K
                for the year ended December 31, 2001), and incorporated herein by
                reference.
4.2
Amended
                and Restated By-Laws of the Registrant, as amended through October
                25,
                2005 (incorporated by reference to Exhibit 3.1 to the Registrant's Current
                Report on Form 8-K filed by the Registrant on October 31, 2005),
                and
                incorporated herein by reference.
4.3
Rights
                Agreement dated as of February 26, 2002 between Insituform Technologies,
                Inc. and American Stock Transfer & Trust Company (incorporated by
                reference to Exhibit 1 to the Registrant's Registration Statement on Form
                8-A filed by the Registrant on March 8, 2002), and incorporated herein
                by
                reference.
5.1*
Opinion
                of Thompson Coburn LLP as to the legality of the securities being
                registered.
23.1*
Consent
                of PricewaterhouseCoopers LLP.
23.2*
Consent
                of Thompson Coburn LLP (included in Exhibit 5.1).
24.1*
Power
                of Attorney (set forth on signature page hereto).
99.1
Insituform
                Technologies, Inc. 2006 Non-Employee Director Equity Incentive Plan
                (incorporated by reference to Appendix B to the Registrant's Proxy
                Statement on Schedule 14A (File No. 000-10786), filed by the Registrant
                on
                March 10, 2006), and incorporated herein by
                reference.
*
      Filed
      herewith.