Contract backlog for Bayou and Corrprowas $138.9 million at March 31, 2009. Contract backlog for UPS decreased by $4.4million at March 31, 2009 from December 31, 2008, due to short-term weakness inactivity in the United States, Chile and other international markets. TheCompany believes that a modest rise in commodity prices will result insignificant opportunities for UPS for the remainder of the year, particularly innew growth areas, such as Mexico and the Middle East. Contract backlog for Bayouwas $76.7 million at March 31, 2009, which was down slightly from $86.8 millionat December 31, 2008, but still near historical high levels.

At March 31, 2008,Bayou`s contract backlog was approximately $53.0 million. Corrpro`s contractbacklog at March 31, 2009 was $62.2 million, down from $70.0 million at December31, 2008, but up from $58 million at March 31, 2008 The business environmentfor both operations remains steady. Unrestricted cash decreased in the first quarter of 2009 to $77.5 million from$99.3 million at December 31, 2008, primarily as a result of cash used toacquire Corrpro on March 31, 2009 Insituform Technologies, Inc. is a leading worldwide provider of proprietarytechnologies and services for rehabilitating sewer, water and other undergroundpiping systems without digging and disruption and the corrosion protection ofindustrial pipelines. More information about the Company can be found on itsInternet site at Private Securities Litigation Reform Act of 1995 provides a “safe harbor”for forward-looking statements. The Company makes forward-looking statements inthis news release that represent the Company`s beliefs or expectations aboutfuture events or financial performance. These forward-looking statements arebased on information currently available to the Company and on management`sbeliefs, assumptions, estimates and projections and are not guarantees of futureevents or results.

When used in this document, the words “anticipate,”"estimate,” “believe,” “plan,” “intend,” “may,” “will” and similar expressionsare intended to identify forward-looking statements, but are not the exclusivemeans of identifying such statements. Such statements are subject to known andunknown risks, uncertainties and assumptions, including those referred to fromtime to time in Insituform Technologies Inc.`s filings with the Securities andExchange Commission. In light of these risks, uncertainties and assumptions, theforward-looking events discussed may not occur. In addition, the Company`sactual results may vary materially from those anticipated, estimated, suggestedor projected. Except as required by law, the Company does not assume a duty toupdate forward-looking statements, whether as a result of new information,future events or otherwise.