Aegion 8-K Regulation FD Disclosure

January 9, 2008

This communication contains statements and information that constitute
forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995. These statements are based on Insituform’s
current expectations and are subject to a number of risks, uncertainties
and assumptions that could cause actual results to differ materially from
those described in the forward-looking statements. Risks, uncertainties
and assumptions include, without limitation, the company’s expectations
regarding the growth of its markets and the results to be achieved from its
initiatives.Insituform assumes no obligation and expressly disclaims any
duty to update the information contained herein except as required by law.
Investors are advised to review the Company’s annual, quarterly and
periodic reports filed with the Securities and Exchange Commission.

Agenda

Insituform world headquarters

•Company Description

•Strategic Direction

•Organizational Update

•Financial Outlook

•Conclusion

Company Overview

•Insituform (NASDAQ:INSU) is a
leading provider of trenchless
rehabilitation for water, wastewater,
and industrial pipes

•Headquartered in St. Louis, MO
with operations in over 40 countries

•Revenue ~ $600 million

•Market cap ~ $420 million

•Employees ~ 2,200

Company Overview

Insituform Blue™ project in Colorado Springs

•Ranked #1 wastewater
specialty contractor by
Engineering News Record
(ENR) in 2006

•Ranked #2 behind GE in
water industry by
ChangeWave Alliance
survey in 2007

•Vertically integrated to
provide one point of
contact from R&D to
manufacturing to
installation

Agenda

Insituform Blue™ iTAP™

•Company Description

•Strategic Direction

•Organizational Update

•Financial Outlook

•Conclusion

Insituform Strategy

Maximize Shareholder Value

Strategic Imperatives

•Diversify by Product,
Geography and Customer
Segment

•Optimize NAR

•Integrate and Grow Europe

•Realign Overhead

•Pursue Inorganic Growth

Diversify

Optimize NAR

iPlus™ Infusion™ Wet Out Tower

Integrate and Grow Europe

Insituform in Berlin, Germany

Realign Overhead

•Current

–Continue to reduce corporate run rate to
increase profitability

•2007 reduced by approximately $5 million

–Identify additional low- and non-value added
overhead through comprehensive review

•Future

–Continue to reduce total overhead to achieve
$12 million in annualized savings

–Reinvest $4 million of savings in strategic
imperatives to achieve $8 million in net savings

Pursue Inorganic Growth

Exploring growth in new areas

•Future

–Ally with, invest in, and/or
acquire companies that offer
differentiated pipeline
technologies and services
that are complementary to
current distribution channel
and/or companies that offer
complementary distribution
channels in geographic or
customer segments where
the Company does not
already enjoy significant
presence.

•Current

–Establish strong competency
in corporate venturing

Agenda

•Company Description

•Strategic Direction

•Organizational Update

•Financial Outlook

•Conclusion

Organizational Update

•Search Committee and search firm continue to
conduct first- and second-round interviews of
CEO candidates

•Expect to name a new CEO in Q1 2008

•Realigned management structure to facilitate
execution of strategic imperatives

–COO (Optimize NAR and Integrate and Grow Europe)

–CFO (Realign Overhead)

–VP - Strategic Business Initiatives (Diversify by
Geography, Customer Segment and Product)

–VP - Marketing and Technology (Pursue Inorganic
Growth)

–CAO (support to all imperatives)

–VP - Business Integration (Integrate Europe and
Pursue Inorganic Growth)

Agenda

•Company Description

•Strategic Direction

•Organizational Update

•Financial Outlook

•Conclusion

Financial Outlook

Management Compensation

•Short-term, cash
incentive
compensation tied to
corporate net income

•Long-term, non-cash
incentive
compensation tied to
financial targets
(restricted stock) and
appreciation in stock
price (stock options)

Agenda

•Company Description

•Strategic Direction

•Organizational Update

•Financial Outlook

•Conclusion