Bayou Announces Award of $27.6 Million Contract in Connection With Fayetteville Express Pipeline Project

The Bayou Companies, Inc. ("Bayou”), a subsidiary of Insituform Technologies, Inc. (NASDAQ Global Select Market: INSU), today announced it was awarded a $27.6 million contract with ILVA S.p.A. ("ILVA”) for pipe coating, welding and logistical support services. ILVA is manufacturing and transporting pipe for installation on the Fayetteville Express Pipeline ("FEP”), a natural gas pipeline joint venture between Kinder Morgan Energy Partners, L.P. and Energy Transfer Partners, L.P.

Dr. Andrea Bellicini, ILVA’s Commercial Director for Plate and Pipe said, "ILVA is pleased to be working with The Bayou Companies again on another major pipeline project. We are confident we will build on our successful relationship for the benefit of our client, Fayetteville Express Pipeline.”

Bayou’s work on the project will include the coating and double joint welding of approximately 185 miles of 42-inch pipe. Bayou will coat the pipe using internal flow efficiency and external fusion bonded epoxy processes. The internal flow efficiency process improves the flow of gas through the pipeline by creating a smooth, defect-free surface. The fusion bonded epoxy coating process is an environmentally safe cathodic protection technique used to inhibit corrosion of the pipeline. Bayou is a leading provider of these and other products and services to the onshore and offshore oil and gas industries, primarily in North America and the Gulf of Mexico.

Bayou will also provide logistical support to ILVA in connection with the shipping and transport of the finished pipe to certain project sites. The FEP will originate in Conway County, Arkansas and terminate at an interconnect with Trunkline Gas Company in Panola County, Mississippi. Bayou anticipates work on the project to begin this month and expects completion by March 2010.

The FEP is designed to contribute to energy independence and stability, stimulate economic growth and help to meet future energy needs in the United States. Importantly, the FEP will add new pipeline access and takeaway capacity for the Fayetteville Shale.

Bayou has partnered with ILVA on several projects over the past 15 years. Jerry Shea, Managing Director of Business Development for Bayou, stated, "We are very pleased that ILVA has awarded Bayou the Fayetteville Express Pipeline project. We are confident that we will manage this project in an efficient and expeditious manner. We look forward to working with ILVA on this project and many more in the future.”

About Bayou

The Bayou Companies, Inc. was acquired by Insituform Technologies, Inc. in early 2009. Bayou is a leading provider of cost-effective solutions to onshore and offshore energy and infrastructure companies primarily in North America and the Gulf of Mexico. Bayou’s products and services include internal and external pipeline coating, lining, weighting and insulation. Bayou also provides specialty fabrication and services for offshore deepwater installations, including project management and logistics. More information about Bayou can be found on its internet site at www.bayoucompanies.com.

About Insituform

Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water, energy and mining piping systems and the corrosion protection of industrial pipelines. More information about Insituform can be found on its internet site at www.insituform.com.

Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a "safe harbor” for forward-looking statements. The Company makes forward-looking statements in this news release that represent the Company’s beliefs or expectations about future events or financial performance. These forward-looking statements are based on information currently available to the Company and on management’s beliefs, assumptions, estimates or projections and are not guarantees of future events or results. When used in this document, the words "anticipate,” "estimate,” "believe,” "plan,” "intend,” "may,” "will” and similar expressions are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Such statements are subject to known and unknown risks, uncertainties and assumptions, including those referred to in the "Risk Factors” section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2008, as filed with the Securities and Exchange Commission on March 2, 2009, and in our subsequent quarterly reports on Form 10-Q. In light of these risks, uncertainties and assumptions, the forward-looking events may not occur. In addition, our actual results may vary materially from those anticipated, estimated, suggested or projected. Except as required by law, we do not assume a duty to update forward-looking statement, whether as a result of new information, future events or otherwise. Investors should, however, review additional disclosures made by the Company from time to time in its periodic filings with the Securities and Exchange Commission. Please use caution and do not place reliance on forward-looking statements. All forward-looking statements made by the Company in this news release are qualified by these cautionary statements.

Insituform^®, the Insituform^® logo, Bayou^™ and the Bayou^™ logo are the registered and unregistered trademarks of Insituform Technologies, Inc. and its affiliates.