Insituform Technologies, Inc. Reports Record Fourth Quarter and Year-End 2010 Results:

Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) today reported fourth quarter income from continuing operations of $17.4 million ($0.44 per diluted share), representing a 10.2 percent increase from the fourth quarter of 2009, when income from continuing operations, excluding restructuring and acquisition-related charges was $15.8 million ($0.41 per diluted share) (non-GAAP).

For the full year of 2010, income from continuing operations was $60.6 million, or $1.54 per diluted share, compared to $38.9 million, exclusive of restructuring and acquisition-related charges, or $1.04 per diluted share, for the full year of 2009 (non-GAAP).

The fourth quarter 2009 results were impacted by restructuring and acquisition-related pre-tax charges of $5.5 million ($4.0 million after-tax, or $0.10 per diluted share). Approximately $5.2 million related to the previously announced reorganization of our European Sewer Rehabilitation segment and closure of our Corrpro Companies, Inc. ("Corrpro”) paint-team operations.

Fourth quarter net income was $17.4 million, or $0.44 per diluted share. This compares to $15.7 million, exclusive of restructuring and acquisition-related charges, or $0.40 per diluted share, for the fourth quarter of 2009 (non-GAAP). For the full year of 2010, net income was $60.5 million, or $1.53 per diluted share, compared to net income of $34.9 million, exclusive of restructuring and acquisition-related charges, or $0.93 per diluted share, for the full year of 2009 (non-GAAP).

Joe Burgess, President and Chief Executive Officer, commented, "I am very pleased to close out 2010 on a strong note with the achievement of record results for both the fourth quarter and the full year. We had strong performances from Energy and Mining and Europe, and our North American sewer margins rebounded nicely in the fourth quarter as well. Our contract backlog was down at year-end due to the delayed timing of several large bids in our North American Sewer Rehabilitation and Energy and Mining operations. We expect increasing prospects in all of our markets in 2011, particularly our Energy and Mining segment.”

"We have dramatically increased our profitability and returns over the last three years, and we are continuing our vigorous pursuit of strategic growth opportunities and operational improvements for each of our businesses. We continue to have momentum throughout our Company and we expect 2011 to be another strong growth year for Insituform. We anticipate 2011 earnings per share to be in the range of $1.75 to $1.90.”

"Gross margins in North American Sewer Rehabilitation bounced back this quarter to 23.7 percent and, more importantly, the operation achieved a 12.1 percent operating margin, much more in line with our expectations. We have continued to make progress with respect to improving our project management execution and the creation of a more performance-driven culture. Market conditions continue to be solid in most areas of the United States, and we continue to believe that the market will grow modestly in 2011. With the combination of growth and continued operational improvements, we believe that the earnings power of this business is significant.”

"Our European Sewer Rehabilitation operation had its strongest quarterly operating income in many years, and it achieved an operating margin of 11.2 percent, despite a 6.0 percent decrease in revenue. We have realized the anticipated cost savings from our 2009 restructuring efforts, and we are experiencing significantly improved profitability from our manufacturing operations as a result of efficiency gains, increased third party tube sales and optimization of transfer prices. While our contract backlog at the end of the year was lower than prior years, we expect to see growth in backlog in future months as a result of growth in the United Kingdom, as it moves through its cyclical spending pattern. The backlog decline also reflects our decision in 2009 to exit the Romanian, Polish and Belgian contracting markets. We expect to see continued momentum in 2011 for our European business as economic conditions recover and we continue to pursue increased manufacturing optimization and growth in third party tube sales.”

"Our Asia-Pacific Sewer Rehabilitation business was weaker this quarter, principally due to our Indian operation, which was hampered by continued project delays. However, performance in Australia, Hong Kong and Singapore was strong, and our backlog in these markets remains robust. As we have discussed for some time, we anticipate a return of project bidding activity in India very soon. We now have March 2011 release dates for several large projects in India, and we are confident of a more robust market for the remainder of the year. With the return of project activity in India, along with increasing market opportunities in our other operations and new markets in Asia, we anticipate significant improvements in profitability in 2011 in this strategic growth business.”

"While the results in our Water Rehabilitation operation were below our expectations in the fourth quarter, we continued to broaden our operating capability with the InsituMain^® product line, with installations in pipe diameters up to 36 inches. As we get through the winter months in 2011, we anticipate order flow to pick up, as we have line of sight on a significant number of large projects to be bid or negotiated in 2011. Most importantly, we are also continuing to pursue growth opportunities to bring about stronger operating capability in the water segment.”

"Energy and Mining continued its strong momentum in the fourth quarter. Operating income improved by more than 38 percent over the prior year period, with strong results in each business line, with the most significant increase coming from Bayou as a result of several large gas pipeline coating projects in New Iberia. While Bayou delivered strong operating income gains in the fourth quarter and the full year of 2010, we also enjoyed spectacular results in our 49 percent owned coating joint venture in Baton Rouge. This operation delivered $4.3 million in equity earnings for 2010, significantly outpacing earnings in any year in its history. United Pipeline Systems achieved yet another record year, and will begin 2011 with its strongest backlog in history. Corrpro also finished strong in 2010, and market conditions in North America continue to be strong. We are pursuing significant opportunities for these businesses in the Middle East and Asia and should achieve meaningful progress during 2011. We are extremely optimistic that the Energy and Mining platform will be a significant growth engine for the Company with sustained global energy demand and solid commodity pricing.”

Consolidated revenues in the fourth quarter of 2010 were $246.0 million, a 15.1 percent increase over the fourth quarter of 2009. This increase was primarily due to strength in our Energy and Mining and North American Sewer Rehabilitation segments. Revenues in our Energy and Mining segment increased $24.6 million, or 30.6 percent, compared to the fourth quarter 2009, primarily as a result of significantly increased activity in our industrial contracting and pipe coating businesses. Revenues in our North American Sewer Rehabilitation segment increased by $9.2 million, or 9.7 percent, compared to the fourth quarter 2009, reflective of a concerted effort to monetize recent backlog strength. In addition, third-party product sales in our North American Sewer Rehabilitation segment were $4.4 million in the fourth quarter of 2010, compared to $2.5 million in the fourth quarter of 2009. Revenues in our European Sewer Rehabilitation segment declined $1.4 million, or 6.0 percent, quarter over quarter, primarily due to continuing market weakness in France and the United Kingdom. Our Asia-Pacific Sewer Rehabilitation and Water Rehabilitation segments were relatively flat, quarter over quarter.

Consolidated gross profit for the fourth quarter of 2010 totaled $60.3 million, an increase of $1.4 million, or 2.4 percent, from the same period in 2009. The increase in gross profit was primarily due to the increase in revenues previously discussed, partially offset by a decline in gross profit margins. During the fourth quarter of 2010, our Energy and Mining segment gross profit increased by $3.8 million, or 16.2 percent, quarter over quarter, primarily due to significant improvement in our coating operations as a result of large coating projects for onshore gas projects in the southeast United States. Additionally, the fourth quarter of 2010 included the gross profit from Bayou Perma-Pipe Canada, our Canadian pipe coating joint venture ("Bayou-Canada”), and Bayou Delta Double Jointing, our specialty welding joint venture ("DDJ”), which were recent start-ups. These collectively added $3.9 million in gross profit in the fourth quarter of 2010. Our gross margins in the Energy and Mining segment were lower in the fourth quarter of 2010 as a result of lower margin projects being performed in certain international markets relating to industrial lining, most notably, South America and Australia, where margins are typically lower. Our North American Sewer Rehabilitation segment experienced a $1.6 million, or 6.2 percent, decrease in gross profit compared to the fourth quarter of 2009. This decrease was attributable to lower margin projects executed and inefficiencies in certain operations as a result of severe weather conditions. These weather conditions have persisted into the first quarter of 2011, and we anticipate a negative impact to North American Sewer Rehabilitation operations for the first quarter of 2011. Our European Sewer Rehabilitation segment was relatively flat in gross profit during the fourth quarter of 2010; however, we experienced a 190 basis point improvement in gross margin percentage during the same time period. The improved gross margin was due principally to our decision to exit contracting markets in Eastern Europe and focus on the more profitable regions of Europe and third party tube sales. We expect European margins to continue to improve in 2011 compared to 2010. Gross profit in our Asia-Pacific Sewer Rehabilitation segment decreased slightly, as a result of continued weakness in India from older, lower margin projects. This decline was partially offset by growth in our Singaporean and Australian operations where gross profits were strong. Gross profit in our Water Rehabilitation segment decreased by $0.5 million due primarily to lower margin projects in the United States as we continued to perform pilot projects for InsituMain^® and expand the technical envelope of the product.

Consolidated operating expenses for the fourth quarter of 2010 were $35.5 million, a decrease of $5.6 million, or 13.6 percent, compared to the prior-year period. As discussed earlier, fourth quarter 2009 results were negatively impacted by restructuring and acquisition-related pre-tax charges of $5.5 million within the operating expense section. Excluding these one-time costs, operating expenses for the fourth quarter of 2010 were relatively in line with the prior year, despite business unit expansion during 2010. Fourth quarter 2010 included operating expenses for DDJ and our Singaporean operations, which were not included in the fourth quarter 2009 results. These additional expenses were offset by cost reductions in both North American Sewer Rehabilitation and Europe Sewer Rehabilitation from continued cost reduction initiatives implemented throughout the year.

Consolidated operating income in the fourth quarter of 2010 was $24.8 million, a $1.4 million, or 6.2 percent increase, from the fourth quarter of 2009, excluding the non-recurring restructuring and acquisition related expenses (non-GAAP).

For the full year of 2010, consolidated revenues increased $188.1 million, or 25.9 percent, to $915.0 million from $726.9 million during the full year of 2009. Gross profit increased $39.0 million, or 20.5 percent, to $229.6 million compared to the prior year. Revenues and gross profit were primarily impacted by strong growth from our Energy and Mining segment as well as the full year results of Corrpro and Bayou. North American Sewer Rehabilitation gross profit improved due to higher revenues but gross profit margin declined primarily due to isolated project execution issues. Gross profit in our Asia-Pacific Sewer Rehabilitation segment increased principally as a result of the increase in revenues from the addition of our Singaporean operations and full year results for our Australian and Hong Kong operations. Gross profit margin in Asia was negatively impacted as a result of significant project writedowns over technical changes and delays in India. Gross profit in our Water Rehabilitation segment increased by $0.3 million as we continued to validate InsituMain^®. Operating expenses, excluding the impacts of acquisition-related and restructuring charges, increased $13.7 million, or 10.5 percent, to $144.2 million in 2010 compared to 2009. This increase in operating expenses includes full year results from our Energy and Mining segment, including the Bayou and Corrpro acquisitions, Bayou Canada and DDJ, and growth in our Asia-Pacific Sewer Rehabilitation business which includes our new Singaporean operation and full year operating expenses for our Hong Kong and Australian businesses. The increase was partially offset by lower operating expenses in our other three segments, specifically $8.4 million in European Sewer Rehabilitation and $1.9 million in North American Sewer Rehabilitation. These decreases were primarily the result of the previously discussed cost reduction measures implemented in both segments. As a result of the foregoing, consolidated operating income, excluding the impacts of acquisition-related and restructuring charges, increased $25.8 million, or 42.1 percent, to $87.0 million for 2010 compared to 2009 (non-GAAP).

Excluding restructuring and acquisition related expenses, income from continuing operations increased in 2010 by $21.7 million, or 55.6 percent, to $60.6 million, or $1.54 per diluted share, from $38.9 million, or $1.04 per diluted share, in 2009 (non-GAAP).

Total contract backlog decreased to $408.7 million at December 31, 2010 compared to $454.6 million at September 30, 2010 and $463.4 million at December 31, 2009.

Contract backlog in our North American Sewer Rehabilitation segment at December 31, 2010 was $155.7 million, representing a decrease of $29.4 million, or 15.9 percent, compared to September 30, 2010. Contract backlog decreased $25.2 million, or 13.9 percent, compared to December 31, 2009. Orders were relatively low during the fourth quarter of 2010, as a result of a number of project bid delays to first quarter 2011, particularly in the western United States. However, market conditions remain solid for 2011. We are experiencing an increase in bidding activity during the first quarter throughout North America.

Contract backlog at December 31, 2010 in our European Sewer Rehabilitation segment decreased by $2.7 million, or 10.4 percent, to $23.3 million compared to $26.0 million at September 30, 2010, and by $13.9 million, or 37.4 percent, compared to $37.2 million at December 31, 2009. While down from December 2009 levels, contract backlog in the segment reflect market weakness in France and the United Kingdom coupled with our restructuring efforts in 2009, which led to our exit from several unprofitable markets. In 2011, we expect to see modest recovery in market conditions in most of Europe, and we anticipate a healthy recovery in the United Kingdom market.

Contract backlog in our Asia-Pacific Sewer Rehabilitation segment was $79.8 million at December 31, 2010 compared to $81.3 million at September 30, 2010, and $57.4 million at December 31, 2009. The decrease in contract backlog from September 30, 2010 was primarily due to the slow development of the bid table in India. We now have specific bid dates on a number of sizeable bids in India toward the end of the first quarter of 2011, and we are optimistic about continued project flow during 2011. Backlog remains very strong in Australia, Singapore and Hong Kong as these markets continue to develop and we expand our sales and operating capability.

Water Rehabilitation contract backlog was $3.8 million at December 31, 2010 compared to $5.9 million at September 30, 2010 and $7.7 million at December 31, 2009. We continued to expand our operational capabilities during the fourth quarter and anticipate significant project bids being released during the first and second quarters of 2011.

Energy and Mining contract backlog was $146.1 million at December 31, 2010 compared to $156.3 million at September 30, 2010 and $180.2 million at December 31, 2009. Contract backlog for our industrial lining business increased to a record level, $64.4 million, at December 31, 2010, an increase of $11.5 million from September 30, 2010, and $7.2 million from December 31, 2009. This increase was primarily due to recent wins in South America along with other incremental improvements in United Pipeline System’s primary geographies. Bayou’s pipeline coating and related services backlog was $24.8 million at December 31, 2010. Since year-end we have picked up approximately $15.0 million in new orders for Bayou’s New Iberia coating operation, and we have good line of sight on more significant onshore gas pipeline coating projects that could fill the capacity of our coating facilities for the balance of 2011. Corrpro backlog remains strong. At December 31, 2010, backlog in Corrpro was $56.9 million, slightly higher than backlog at December 31, 2009. We continue to experience strong, sustained market opportunities on a global basis for each of our energy and mining businesses and we expect to see continued positive growth trends for the foreseeable future due to stronger oil, gas and mining commodity markets.

Unrestricted cash increased by $16.6 million, or 16.9 percent, to $114.8 million at December 31, 2010 from $98.2 million at September 30, 2010, principally as a result of improved net income and enhanced working capital management, including a slight improvement in DSOs. Unrestricted cash also increased by $8.8 million from December 31, 2009.

Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water and 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, 2009, as filed with the Securities and Exchange Commission on March 1, 2010. 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 statements, 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.

Regulation G Statement

Insituform has presented certain information in this release excluding certain factors that impacted income and diluted earnings per share. The (non-GAAP) earnings excludes the earnings impact of the exclusion of restructuring charges and acquisition and related costs. Insituform management uses such non-GAAP information internally to evaluate financial performance for its operations, as the Company believes it allows it to more accurately compare the Company’s ongoing performance across periods.

Insituform^®, the Insituform^® logo, InsituMain^®, United Pipeline Systems^®, Bayou Companies™ and Corrpro^® are the registered and unregistered trademarks of Insituform Technologies, Inc. and its affiliates.