INSITUFORM TECHNOLOGIES INC
10-K, 2000-03-24
WATER, SEWER, PIPELINE, COMM & POWER LINE CONSTRUCTION
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                          UNITED STATES
               SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C. 20549

                            FORM 10-K
(Mark One)
[ X ]         ANNUAL REPORT PURSUANT TO SECTION 13
         OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

          For the fiscal year ended December 31, 1999

                               OR

[   ]        TRANSITION REPORT PURSUANT TO SECTION
       13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

     For the transition period from ---------- to ----------

                Commission file number 0-10786

                  INSITUFORM TECHNOLOGIES, INC.
    --------------------------------------------------------
     (Exact name of registrant as specified in its charter)

         Delaware                               13-3032158
- -------------------------------               ------------------
(State or other jurisdiction of               (I.R.S. Employer
incorporation or organization)                Identification No.)

   702 Spirit 40 Park Drive
   Chesterfield, Missouri                          63005
- ----------------------------------------          ------------
(Address of principal executive offices)          (Zip Code)

Registrant's telephone number, including area code:  636-530-8000
                                                    ------------
Securities registered pursuant to Section 12(b) of the Act:  None
                                                            ----
Securities registered pursuant to Section 12(g) of the Act:


              Class A Common Stock, $.01 par value
              ------------------------------------
                        (Title of class)

     Indicate by a check mark whether the registrant (1) has filed
all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months (or
for such shorter period as the registrant was required to file
such reports), and (2) has been subject to such filing
requirements for the past 90 days.

                       Yes [ X ]           No [    ]

<PAGE>
<PAGE>
          Indicate by check mark if disclosure of delinquent
filers pursuant to Item 405 of Regulation S-K (Section 229.405 of
this chapter) is not contained herein, and will not be contained,
to the best of registrant's knowledge, in definitive proxy or
information statements incorporated by reference in Part III of
this Form 10-K or any amendment to this Form 10-K. [ X ]

          State the aggregate market value of the voting and non-
voting stock held by non-affiliates of the registrant. The
aggregate market value shall be computed by reference to the price
at which the common stock was sold, or the average bid and asked
prices of such common equity, as of a specified date within 60
days prior to the date of filing.

Aggregate market value as of March 1, 2000..........$600,665,663

          Indicate the number of shares outstanding of each of the
registrant's classes of common stock as of the latest practicable
date.

          Class A Common Stock, $.01 par value,
           as of March 1, 2000..................24,670,268 shares



               DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the documents, all or portions of which are
incorporated by reference herein, and the part of the Form 10-K
into which the document is incorporated: Proxy Statement to be
filed with respect to the 2000 Annual Meeting of Stockholders-Part
III.


<PAGE>
<PAGE>
                             PART I

ITEM 1. BUSINESS

General

     Insituform Technologies, Inc. (the "Company") is a worldwide
provider of proprietary trenchless technologies for the
rehabilitation and improvement of pipelines. The Company's primary
technology is the Insituform(R) Process (the "Insituform
Process"), a "cured-in-place," non-disruptive pipeline
rehabilitation process that, during the Company's most recent
fiscal year, contributed approximately 76% of the Company's
revenues.

     In addition to the Insituform Process, the Company offers
certain other products in trenchless pipeline system
rehabilitation. The Company's NuPipe(R) Process (the "NuPipe
Process"), which utilizes a "fold and formed" technology, is used
primarily to repair smaller or less damaged pipe. During the year
ended December 31, 1999, the Company also acquired the remaining
rights to the Thermopipe(R) System (the "Thermopipe Process"), a
process for rehabilitating potable water and other aqueous fluid
pipes previously licensed to the Company.

     The Company's TiteLiner(R) Process (the "TiteLiner Process")
is used to line new and existing steel pipe. Through its
Affholder, Inc. subsidiary, the Company is engaged in trenchless
tunnelling used in the installation of new underground pipelines.

     The Company was incorporated in Delaware in 1980 under the
name Insituform of North America, Inc., in order to act as the
exclusive licensee of the Insituform Process in most of the United
States, and to license other companies to market and provide
Insituform installation services in return for royalties and sales
from materials manufactured by the Company. Contemporaneously with
the consummation in 1992 of the Company's acquisition of its
licensor, the name of the Company was changed to Insituform
Technologies, Inc. As a result of its successive licensee
acquisitions, the Company has further integrated its business to
perform the entire process of manufacture and installation using
its trenchless processes.

     As used in this Annual Report on Form 10-K, the term the
"Company" refers to the Company and, unless the context otherwise
requires, its direct and indirect subsidiaries. For certain
information concerning each of the Company's industry segments and
domestic and foreign operations, see Note 14 of the Notes to the
Company's Consolidated Financial Statements included in response
to "Item 14. Exhibits, Financial Statement Schedules, and Reports
on Form 8-K," which information is incorporated herein by
reference.

<PAGE>
<PAGE>
     This Annual Report on Form 10-K contains various forward
looking statements and information that are based on information
currently available to management and management's beliefs and
assumptions. When used in this document, the words "anticipate,"
"estimate," "believes," "plans," 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 risks and uncertainties, and the Company's actual
results may vary materially from those anticipated, estimated or
projected due to a number of factors, including, without
limitation, the competitive environment for the Company's products
and services, the geographical distribution and mix of the
Company's work, and other factors set forth in reports and other
documents filed by the Company with the Securities and Exchange
Commission from time to time.

Technologies

     Pipeline System Rehabilitation. The Insituform Process for
the rehabilitation of sewers, pipelines and other conduits
utilizes a custom-manufactured tube, or liner, made of a synthetic
fiber. After the tube is saturated (impregnated) with a
thermosetting resin mixture, it is installed in the host pipe by
various processes and the resin is then hardened, usually by
heating it by various means, forming a new rigid pipe within a
pipe.

     The Company's NuPipe Process entails the manufacture of a
folded replacement pipe from a thermoplastic material which is
stored on a reel in a reduced shape. The pipe is heated at the
installation site in order to make it flexible enough to be
inserted into an existing conduit, pulled into place and then
sequentially expanded to match the existing conduit by internal
heat and pressure and progressive rounding, creating a tight fit
against the conduit being repaired.

      See "Patents and Licenses" below for information concerning
the Thermopipe Process, which was not material to the Company's
results of operations during the year ended December 31, 1999.

     Corrosion and Abrasion Protection.  The Company's TiteLiner
Process is a method of lining new and existing steel pipe with a
corrosion and abrasion resistant polyethylene pipe.

     Tunnelling.  Tunnelling is a trenchless, subterranean
construction process that the Company utilizes to construct new
pipes from two to fourteen-foot diameter in size.

Rehabilitation Activities

     The Company conducts its rehabilitation activities
principally through direct installation and other construction
operations performed through wholly-owned and, in some cases, 
<PAGE>
<PAGE>
majority-owned subsidiaries. In addition, in those areas of the
world in which the Company's management believes it would not be
profitable for the Company to exploit its trenchless processes
directly, the Company has granted licenses to unaffiliated
companies. As described under "Ownership Interests in Licensees"
below, the Company has also entered into joint ventures from time
to time to encourage additional royalties, sales of its products
and exploitation of its trenchless rehabilitation processes.

     The Company's principal rehabilitation activities in North
America are conducted directly or through subsidiaries which hold
the Insituform Process and NuPipe Process rights for substantially
all of 44 of the 50 states, in addition to Puerto Rico and the
U.S. Virgin Islands, and the rights to the Thermopipe Process. In
July 1999, the Company withdrew from its participation in Midsouth
Partners, a joint venture that conducted Insituform Process and
NuPipe Process operations in Tennessee, Kentucky and portions of
Mississippi, and the Company expanded its activities to cover this
territory. See "Ownership Interests in Licensees" below. In
February 2000, the Company acquired the operations of Insituform
Metropolitan, Inc. and certain of its affiliates, the Company's
licensees in the states of New York and New Jersey, and has
integrated these territories into its rehabilitation activities.
See "Item 7. Management's Discussion and Analysis of Financial
Condition and Results of Operations-Liquidity and Capital
Resources."

     Outside of North America, the Company conducts Insituform
Process or NuPipe Process direct installation operations through
its subsidiaries in the United Kingdom, France, Spain and the
Netherlands. The Company's Dutch operation was acquired in June
1999 through the purchase of the stock of the Company's licensee
in the Netherlands, now named Insituform Rioolrenovatietechnieken
B.V. See "Item 7. Management's Discussion and Analysis of
Financial Condition and Results of Operations-Liquidity and
Capital Resources." Through the operations of its French
subsidiary, Video Injection S.A. ("Video Injection"), acquired in
1998, the Company utilizes multifunctional robotic devices
developed by Video Injection in connection with the inspection and
repair of pipelines.

     North American rehabilitation operations are headquartered in
Chesterfield, Missouri, with principal operations facilities
maintained in approximately 13 locations geographically dispersed
through all major regions. European operations are headquartered
in La Courneuve, France, with regional operations facilities
located in the United Kingdom and the Netherlands.

     The worldwide rights to the TiteLiner Process are applied by
the Company through its United Pipeline System division, which
offers corrosion and abrasion protection work worldwide.

<PAGE>
<PAGE>
     The Company's Affholder, Inc. subsidiary, in addition to
tunnelling, offers a range of pipe system rehabilitation services.

     The direct installation business of the Company is
project-oriented, and contracts may be obtained through
competitive bidding, usually requiring performance at a fixed
price. The profitability of these operations to the Company
depends upon the ability to estimate costs accurately, and such
estimates may prove to be inaccurate as a result of unforeseen
conditions or events. A substantial proportion of the work on any
given project may be subcontracted out to third parties by the
Company.

     Proper trenchless installation requires certain expertise
that is acquired on the job and through training, and, if an
installation is improperly performed, the Company may be required
to repair the defect, which may involve excavation. The Company,
accordingly, has incurred significant costs in establishing new
field installation crews, in training new operations personnel and
in equipping its direct installation staff. The Company generally
invoices installation revenues on a percentage-of-completion
basis. Under ordinary circumstances, collection from governmental
agencies in the United States is made within 60 to 90 days of
billing. In some cases, five to 15 percent of the contract value
is withheld by the owner until testing is completed or the
warranty period has expired.

     The Company is required to carry insurance and bonding in
connection with certain direct installation projects and,
accordingly, maintains comprehensive insurance policies, including
workers' compensation, general and automobile liability, and
property coverage. The Company believes that it presently
maintains adequate insurance coverage for all direct installation
activities. The Company has also arranged bonding capacity for
bid, performance and payment bonds. Typically, the cost of a
performance bond is less than approximately 1% of the contract
value. The Company is required to indemnify surety companies for
any payments the sureties are required to make under the bonds.

     The Company's principal rehabilitation activities are
conducted through subsidiaries that are less than wholly-owned as
follows:
<TABLE>
<CAPTION>
     Subsidiary                           Interest
     ----------                           --------
     <S>                                     <C>
     Insituform France                    66-2/3% of stock(1)
      S.A.

     United Pipeline                      55% of stock (2)
      de Mexico, S.A.

     Video Injection                      80% of stock (3)
       S.A.

<PAGE>
<PAGE>
- ----------------------
(1)  The remaining interest is held by a subsidiary of Suez-Lyonnaise des Eaux
     S.A.

(2)  The remaining interest is held by a subsidiary of Produtos y Servicios
     Miller de Mexico, S.A.

(3)  The remaining interest is held by the subsidiary's principal employees
     and is subject to purchase by the Company in September 2003 (or earlier
     in specified events).
</TABLE>

     The Company's rehabilitation activities also extend to the
grant of licenses for the Insituform Process and the NuPipe
Process, covering exclusive and non-exclusive territories, to
licensees who provide pipeline repair and rehabilitation services
throughout their respective licensed territories. The licenses
generally grant to the licensee the right to utilize the know-how
and practice the invention of the patent rights (where they exist)
relating to the subject process, and to use the Company's
copyrights and trademarks. At present, the Insituform Process is
commercialized under license by an aggregate of 31 unaffiliated
licensees and sublicensees, and the NuPipe Process is commercial-
ized under license by an aggregate of six unaffiliated licensees.

     The Company's licensees generally are obligated to pay a
royalty at a specified rate, which in many cases is subject to a
minimum royalty payment. Domestic licensees are also obligated to
pay specified royalty surcharges on their sales and contracts
outside of their licensed territories, which are then paid by the
Company to the domestic licensee in whose territory the
installation was performed. Any improvements or modifications a
licensee may make in the subject process during the term of the
license agreement becomes the property of the Company or are
licensed to the Company. Should a licensee fail to meet its
royalty obligations or other material obligations, the Company may
terminate the license. Many licensees (including the domestic
licensees), upon prior notice to the Company, may also terminate
the license for any reason. The Company may vary the agreement
used with new licensees according to prevailing conditions.

     As a result of the Company's acquisition of the remaining
rights to the Thermopipe Process in December 1999, the Company
assumed the obligations as licensor under arrangements relating to
the use of the system in Germany, on an exclusive basis, and in
the United Kingdom, on a non-exclusive basis.

Ownership Interests in Licensees

     The Company, through its subsidiary, Insituform Holdings (UK)
Limited, holds one-half of the equity interest in Insituform
Rohrsanierungstechniken GmbH ("IRT"), the Company's licensee of
the Insituform and NuPipe Processes in Germany. The remaining
interest is held by Per Aarsleff A/S, a Danish contractor ("Per 
<PAGE>
<PAGE>
Aarsleff"). The joint venture partners have rights--
of-first-refusal in the event either party determines to divest
its interest.

     The Company holds additional ownership interests in licensees
as follows:
<TABLE>
<CAPTION>
Licensee               Processes    Territory           Interest
- --------               ---------    ---------           --------
<S>                    <C>          <C>                 <C>
N.V. Kumpen-Insituform Insituform   Belgium,            50% joint venture
                                    Luxembourg          interest(1)

Ka-Te Insituform A.G.  Insituform   Switzerland,        50% joint venture
                                    Liechtenstein and   interest(2)
                                    Voralberg, Austria
_____________________
(1) The remaining interest is held by N.V. Kumpen.
(2) The remaining interest is held by Ka-Te Holding A.G.
</TABLE>

    The Company has also entered into several contractual joint
ventures in order to develop joint bids on contracts for its
direct installation business, and for tunnelling operations. The
Company continues to investigate opportunities for expanding its
business through such arrangements.

    In July 1999, following the Company's notice of termination
of its joint venture with Insituform East Inc. ("Insituform
East"), an unaffiliated licensee, the Company entered into a
settlement agreement with Insituform East providing for dismissal
of pending actions before the Delaware Chancery Court and the
American Arbitration Association. Under the settlement, the
Company and its subsidiary withdrew from the joint venture, which
does business under the name Midsouth Partners ("Midsouth"), and
the licenses from the Company to Midsouth with respect to the
Insituform Process and the NuPipe Process were terminated. Until
settlement, Midsouth had operated under its licenses from the
Company in a territory consisting of Tennessee and portions of
Mississippi and Kentucky. Pursuant to the settlement, Insituform
East paid the amount of $1,200,000 to the Company, equal to the
book value of the interests of the Company and its subsidiary in
Midsouth, and repaid to the Company outstanding loans to Midsouth
in the amount of $400,000.

    The settlement expressly provides that the Company and its
affiliates and licensees may operate in Midsouth's former
exclusive territory without any obligation to Insituform East or
its affiliates. Under the settlement, a subsidiary of Insituform
East retains a non-exclusive right in Midsouth's former territory
to utilize the cured-in-place process and technology in the
condition and state as commercially practiced under Midsouth's
license on the date of settlement. The settlement further provides
that such subsidiary: (i) retains no rights to use the trademark
<PAGE>
<PAGE>
"Insituform"; (ii) is not entitled to receive from the Company any
further improvements or modifications to the cured-in-place
process or technology, nor any technical or marketing support; and
(iii) may not use any of the rights granted outside of such
territory unless such use is inadvertent and de minimis. Any
breach of the foregoing limitations results in immediate
abrogation of the rights granted. See "Item 3. Legal Proceedings"
for information describing subsequent litigation initiated by the
Company alleging breaches by Insituform East of the settlement.

Marketing

    The Company has focused the marketing of its rehabilitation
technologies primarily on the municipal wastewater markets
worldwide, which the Company expects to remain the largest part of
its business for the foreseeable future. The Company produces
sales literature and presentations, participates in trade shows,
conducts national advertising and executes other marketing
programs for the Company's own sales force and those of
unaffiliated licensees.

    As a result of its acquisitions, the Company's distribution
efforts are implemented predominantly through the direct
installation activities of its subsidiaries. See "Rehabilitation
Activities" above for a description of the Company's licensing
operations and "Ownership Interests in Licensees" for a
description of investments in licensees. The Company's
unaffiliated licensees are responsible for marketing and sales
activities in their respective territories, and each has a staff
for that purpose.

    The Company offers its corrosion and abrasion protection
technologies worldwide to line new and existing steel pipelines.

    No customer accounted for more than ten percent of the
Company's consolidated revenues during the years ended December
31, 1999, 1998 and 1997, respectively.

Backlog

    At December 31, 1999 and 1998, respectively, the Company
recorded backlog from construction operations (excluding projects
where the Company has been advised that it is the low bidder) in
the amounts of approximately $132.3 million and $109.3 million,
respectively. The Company anticipates that substantially all
construction backlog recorded at December 31, 1999 will be
completed in 2000.

Product Development

    The Company, by utilizing its own laboratories and test
facilities and outside consulting organizations and academic
institutions, continues to develop improvements to its proprietary
processes, including the materials used and the methods of
<PAGE>
<PAGE>
manufacturing and installing pipe. During the years ended December
31, 1999, 1998 and 1997, the Company spent approximately $2.4
million, $2.2 million and $2.2 million, respectively, on all
research and development activities.

Manufacturing and Suppliers

    The Company maintains its principal North American liner
manufacturing facility in Batesville, Mississippi, with an
additional facility located in Memphis, Tennessee. In Europe,
Insituform Linings Plc ("Linings"), a majority-owned subsidiary,
manufactures and sells linings from its plant located in
Wellingborough, United Kingdom. As a result of the Company's
acquisition in June 1999 of its Dutch licensee and of certain
share repurchases effectuated by Linings in November 1999, the
Company now holds 75% of the interest in Linings and Per Aarsleff
the remainder, all of which remain subject to rights-of-first
refusal held by the Company and the other shareholder in the event
of any proposed disposition. The Company also maintains a liner
manufacturing facility in Matsubuse, Japan.

     While raw materials used in the Company's Insituform products
are typically available from multiple sources, the Company's
historical practice has been to purchase materials from a limited
number of suppliers. The Company maintains its own felt
manufacturing facility contiguous to its Insitutube manufacturing
facility in Batesville, and purchases substantially all of its
fiber requirements from one source, alternate vendors of which the
Company believes are readily available. Although it has worked
with one vendor to develop a uniform and standard resin to source
substantially all of its resin requirements in North America, the
Company believes that resins are also readily available from a
number of major corporations should there be a need for
alternative resin sourcing. The Company believes that the sources
of supply in connection with its Insituform operations are
adequate for its needs.

    The Company purchases the thermoplastic pipe to satisfy the
substantial portion of its NuPipe requirements from an
unaffiliated party. The Company believes that alternative sources
of supply for its pipe requirements in connection with the NuPipe
Process are available. If the Company were unable to obtain its
NuPipe requirements under its existing third party arrangements,
the Company might be adversely affected until arrangements with
alternative sources are formulated.

    Under its arrangements for the acquisition of the Thermopipe
Process, the seller will to continue to manufacture and supply
Thermopipe products to the Company over a period of five years.

    The Company sells liners and related products utilized in the
Insituform Process, and the thermoplastic pipe utilized in the
application of the NuPipe Process, to its licensees, when
appropriate pursuant to fixed-term supply contracts. Under the 
<PAGE>
<PAGE>
arrangements assumed in connection with the acquisition of the
Thermopipe Process, the Company also furnishes Thermopipe products
to its approved contractors and licensees.

    The Company manufactures certain equipment used in its
corrosion and abrasion protection operations, and, in connection
with any licenses to unaffiliated parties, will sell such
equipment to its licensees.

Patents and Licenses

    The Company currently holds 67 patents in the United States
relating to the Insituform Process, the last to expire of which
will remain in effect until 2017, and has obtained patent
protection in its principal overseas markets covering aspects of
the Insituform Process. These patents cover certain aspects of the
Insituform Process including the manufacture of liners, the resin
saturation process and the process of reconstructing the pipeline.
Two of the significant patents relating to the Insituform Process,
covering, respectively, the curing of a resin-impregnated tube and
material aspects of the inversion process, have expired where
previously in effect.

    The specifications and/or rights granted in relation to each
patent will vary from jurisdiction to jurisdiction. In addition,
as a result of differences in the nature of the work performed and
in the climate of the countries in which the work is carried out,
not every licensee uses each patent, and the Company does not
necessarily seek patent protection for all of its inventions in
every jurisdiction in which it does business.

    There can be no assurance that the validity of the Company's
patents will not be successfully challenged or that they are
sufficient to afford protection against another company utilizing
a process similar to the Insituform Process. The Company's
business could be adversely affected by increased competition in
the event that one or more of the patents were adjudicated to be
invalid or inadequate in scope to protect the Company's operations
or upon expiration of the patents. The Company believes, however,
that while the Company has relied on the strength and validity of
its patents, the Company's long experience with the Insituform
Process, its continued commitment to support and develop the
Insituform Process, the strength of its trademarks, and its degree
of market penetration, should enable the Company to continue to
compete effectively in the pipeline rehabilitation market.

    Ten patents covering the NuPipe Process or the materials used
in connection with the NuPipe Process have been issued in the
United States. The Company holds patents in connection with the
NuPipe Process in 16 other countries.

    The Company believes that the success of its corrosion and
abrasion protection operations will depend primarily upon its
proprietary know-how and its marketing and sales skills. 
<PAGE>
<PAGE>
    In December 1999, the Company completed the acquisition from
Angus Fire Armour Limited ("Angus") of the Thermopipe Process for
rehabilitating potable water and other aqueous fluid pipes, to
which the Company previously held the exclusive rights to the
United States and Canada and non-exclusive rights in Mexico and
certain territories in the eastern hemisphere. The acquisition
included one patent relating to the Thermopipe Process issued in
the United States and one patent and two patent applications
outside of the United States, in addition to trademarks, know-how
and related assets. See "Item 7. Management's Discussion and
Analysis of Financial Condition and Result of Operating-Liquidity
and Capital Resources."

    Pursuant to a license from Ashimori Industry Co., Ltd.
("Ashimori"), the Company holds the exclusive rights to use the
patents, trademarks and know-how related to the Paltem-HL system,
a process for rehabilitating pressure pipes, for substantially all
of North America and, on a non-exclusive basis, additional
territories in the eastern hemisphere and Latin America. In May
1999, the license was amended so as not to cover certain other
products under development, except that the license continues to
cover the Paltem-Frepp system (see "Government Regulation" below).
Ashimori is entitled to receive ongoing royalties at specified
rates on installations and sales of liners. During the year ended
December 31, 1999, the Company did not have any material
operations under the Ashimori license.

Competition

    The pipeline reconstruction, rehabilitation and repair
business is highly competitive, and the Company competes against
many companies, some of which have far greater financial resources
and experience than the Company. Accordingly, there can be no
assurance as to the success of the Company's processes in
competition with such companies and alternative technologies for
pipeline rehabilitation.

    In each of its rehabilitation markets, the Company currently
faces competition from more conventional methods, including: (i)
total replacement, which is the excavation and replacement of an
entire section of pipe; (ii) point repair, which is the
replacement of cracked or structurally failed sections of pipes by
actual excavation and replacement; (iii) sliplining, which is the
insertion of a smaller pipe within an existing deteriorated pipe;
and (iv) the placement of gelatinous material, hydraulic cement,
or other acceptable material in defective pipes to repair leaks
and prevent infiltration in gravity sewers.

    In addition, the Company faces competition from other
trenchless processes throughout the world. In the United States,
the Company faces competition from several cured-in-place
processes and, outside of the United States, from additional
cured-in-place processes currently in regional use. The Company
<PAGE>
<PAGE>
also faces competition from several fold and formed thermoplastic
processes. Several companies offer in-place polyethylene lining
systems which compete with the Company's abrasion and corrosion
protection technologies. The Company's trenchless processes may
also encounter competition from alternative trenchless approaches
such as pipe bursting and other methods.

    The Company's tunnelling operation competes with utility
contracting firms throughout North America.

Seasonality

    Although the Company's operations can be affected by severe
weather, for the past five years seasonal variation in work
performed has not had a material effect on the Company's
consolidated results of operations.

Employees

    As of December 31, 1999, the Company employed 1,520
individuals. Certain of the Company's contracting operations are
parties to collective bargaining agreements covering an aggregate
of 174 employees. The Company generally considers its relations
with its employees to be good.

Government Regulation

    The Company and its licensees are required to comply with all
national, state and local statutes, regulations and ordinances,
including those disclosure and filing requirements relating to the
grant of licenses. In addition, the Company's direct installation
and other construction operations, and those of its licensees, may
have to comply with relevant code specifications, permit
requirements, and bonding and insurance requirements as well as
with fire regulations relating to the storage, handling and
transporting of flammable materials. The Company's manufacturing
facilities, as well as its direct installation operations and
those of its licensees, are subject to state and national
environmental protection regulations, none of which presently has
any material effect on the Company's capital expenditures,
earnings or competitive position in connection with the Company's
present business. However, while the Company's direct installation
operations have established monitoring programs relating to the
use of solvents, further restrictions could be imposed on the use
of solvents or the thermosetting resins used in the Insituform
Process. The Company believes that it is in material compliance
with environmental laws and regulations applicable to it.

    The use of both thermoplastics and thermosetting resin
materials in contact with drinking water is strictly regulated in
most countries. In the United States, a consortium led by NSF
International ("NSF"), under arrangements with the United States
Environmental Protection Agency (the "EPA"), establishes minimum
<PAGE>
<PAGE>
requirements for the control of potential human health effects
from substances added indirectly to water via contact with
treatment, storage, transmission and distribution system
components, by defining the maximum permissible concentration of
materials which may be leached from such components into drinking
water, and methods for testing them. In February 1996, the Paltem-
HL and Frepp processes under license from Ashimori were certified
by the NSF for use in drinking water systems. In April 1997, the
Insituform PPL(R) liner was certified by the NSF for use in drinking
water systems, followed in April 1999 by NSF certification of the
Insituform RPP(R) liner for such use. The Thermopipe product also
has NSF approval. The NSF assumes no liability for use of any
products, and the NSF's arrangements with the EPA do not
constitute the EPA's endorsement of the NSF, the NSF's policies or
its standards. Because of the need for dedicated equipment in
connection with use of these products in drinking water
applications, and the time required for the marketing process, the
Company does not expect meaningful revenues from drinking water
rehabilitation at least through 2000.

Executive Officers

    The executive officers of the Company, and their respective
ages and positions with the Company, are as follows:

                         Age at          Position with
     Name             March 1, 2000       the Company
     ----            --------------      -------------

Anthony W. Hooper         52             Chairman of the Board,
                                           President and Chief
                                           Executive Officer

Robert W. Affholder       64             Senior Executive Vice
                                          President

Robert L. Kelley          54             Vice President-General
                                          Counsel

Joseph A. White           46             Vice President-Chief
                                           Financial Officer

Carroll W. Slusher        51             Vice President-North
                                          America

Antoine Menard            49             Vice President-Europe


    Anthony W. Hooper has been Chairman of the Board of the
Company since 1997, and has been President of the Company since
1996. Mr. Hooper was previously, since prior to 1995, Senior Vice
President-Marketing and Technology of the Company.

<PAGE>
<PAGE>
    Robert W. Affholder has been Senior Executive Vice President
of the Company since 1996. Mr. Affholder was previously, since
1995, Senior Vice President-Chief Operating Officer of North
American Contracting Operations of the Company. Mr. Affholder was
President of Insituform Mid-America, Inc. ("IMA") from 1994 until
its acquisition by the Company in 1995, and was Vice Chairman of
IMA from 1993 to 1995.

    Robert L. Kelley has been Vice President and General Counsel
of the Company since 1996. Mr. Kelley was Assistant General
Counsel of Monsanto Company from prior to 1995 until joining the
Company.

    Joseph A. White has been Vice President and Chief Financial
Officer of the Company since August 1999. Mr. White was
previously, from 1998 until joining the Company, Vice President
and Chief Financial Officer of Key Plastics, an automotive parts
manufacturer. From 1997 until 1998, Mr. White was Vice President-
Finance (North America) for the Becker Group, a manufacturer of
automotive interiors. From 1996 until 1997, Mr. White was Director
of Finance in Asia of the Vickers Division of Aeroquip Vickers, a
hydraulics supplier, where he held several other senior finance
positions since prior to 1995.

    Carroll W. Slusher has been Vice President-North America of
the Company since February 1999, having served as the Company's
Director of North American Pipe Rehabilitation from 1997 to 1998
and Divisional Vice President-North American Operations from 1998
until February 1999. From prior to 1995 until joining the Company,
Mr. Slusher was a regional manager with General Electric Company.

    Antoine Menard has been Vice President-Europe of the Company
since February 1999, having served as the Company's Managing
Director-Europe from 1995 until that date. Prior to joining the
Company, Mr. Menard was a general manager with the French oil
group TOTAL.

ITEM 2. PROPERTIES

    The Company's executive offices, located in Chesterfield,
Missouri, a suburb of St. Louis, at 702 Spirit 40 Park Drive, are
leased from an unaffiliated party through May 31, 2002. The
Company owns its research and development facility in
Chesterfield, where operations commenced in 1998.

    The Company maintains a liner fabrication facility and
contiguous felt manufacturing facility in Batesville, Mississippi.
Since prepayment in 1997 of the industrial development bond used
to finance such facilities, the property remains leased to the
Company under arrangements that provide for the Company's purchase
option at (subsequent to such prepayment) nominal value. The
Company's manufacturing facilities in Memphis, Tennessee are
located on land sub-leased from an unaffiliated entity for an
initial term of 40 years expiring on December 31, 2020. 
<PAGE>
<PAGE>
    Linings (a majority-owned subsidiary) owns certain premises
comprising its liner manufacturing facility, located in
Wellingborough, England. The Company leases additional
manufacturing space in Matsubuse, Japan.

    In support of its direct installation operations, the Company
owns or leases facilities in the United States, Europe and Latin
America, the principal sites of which currently are in
Chesterfield, Missouri; Charlton, Massachusetts; Jacksonville,
Florida; Birmingham, Alabama; Hammond, Louisiana; Lemont,
Illinois; Owosso, Michigan; Houston and Dallas, Texas; Wichita,
Kansas; Benecia and Santa Fe Springs, California; Nashville,
Tennessee; Brooks, Oregon; Edmonton, Alberta; Surrey, British
Columbia; Ossett, United Kingdom; Mitry Mory, France; Delft,
Netherlands; and Antofagasta, Chile. The Ossett property is
subject to a mortgage.

    The foregoing facilities are regarded by management as
adequate for the current requirements of the Company's business.
In connection with anticipated future requirements, the Company
intends within the current fiscal year to acquire a facility in
the New York metropolitan area in support of its direct
installation operations and to expand its Chesterfield facilities.

ITEM 3. LEGAL PROCEEDINGS

    Cat Proceeding.  The Company, in 1990, initiated proceedings
against Cat Contracting, Inc. ("CAT"), Michigan Sewer Construction
Company, Inc. and Inliner U.S.A., Inc. (subsequently renamed
FirstLiner USA, Inc. "FirstLiner"), in the United States District
Court for the Southern District of Texas, Houston Division (Civil
Action No. H-90-1690)(the "Cat Proceeding"), alleging infringement
of certain of the Insituform patents in connection with conduit
relining work performed in Houston by licensees of Kanal Sanierung
Hans Muller GmbH & Co.

    In 1991, the jury rendered its verdict finding that defendants
had infringed the Insituform patents at issue and that such
patents were not invalid. The U.S. District Court (the "District
Court"), however, granted the defendants' motion for a new trial
on the matter of whether defendants had infringed the Insituform
patents under the doctrine of equivalents, and granted defendants
judgment notwithstanding the jury verdict on the issue of literal
infringement of those patents. In October 1995, the District Court
held the mandated new trial, ruled that defendants' serial vacuum
impregnation processes infringed the Company's patent under the
doctrine of equivalents, issued a permanent injunction against
defendants' use of the processes covered by such patent and
ordered a trial on the issue of damages. Defendants filed a notice
of appeal to the United States Court of Appeals for the Federal
Circuit (the "Court of Appeals"). In November 1996, the Court of
Appeals, among other matters, vacated the District Court's finding
<PAGE>
<PAGE>
of infringement under the doctrine of equivalents, on the basis of
incorrect claim construction, and remanded the case.

    In December 1996, the District Court found that both of the
processes employed by defendants infringed the Company's serial
vacuum impregnation patent, and defendants again appealed. In
September 1998, the District Court awarded the Company
approximately $21.9 million in damages for specified infringement,
while the Court of Appeals independently affirmed the
determination of the District Court that FirstLiner's multiple-cup
process infringed the Company's serial vacuum impregnation patent,
but reversed the lower court and ruled that FirstLiner's process
involving the use of multiple needles for impregnation of
cured-in-place tubes did not infringe the Company's patent.

    In September 1999, the District Court rendered its final
judgment, awarded damages to the Company in the amount of
approximately $9.5 million and named Giulio Catallo, the owner and
chief executive officer of CAT and FirstLiner, as an individual
party defendant in the proceedings. Defendants have filed an
appeal of the District Court's September 1999 judgment and the
Company has filed a cross appeal, which are pending.

    Additional Texas Proceeding.  In October 1996, two of the
defendants in the Cat Proceeding filed a separate action in the
District Court against the Company and Insituform East alleging,
among other matters, that the Company had commenced the Cat
Proceeding with knowledge that the Company's serial impregnation
patent was invalid and gave false testimony in the Cat Proceeding.
The suit further alleged that the Company committed various
infractions of the antitrust laws and engaged in other anti-
competitive practices in violation of Texas state law, and sought
compensatory and punitive damages.

    The Company denied the allegations, raised affirmative
defenses, and filed a motion to dismiss regarding certain of the
antitrust claims. In August 1997, the District Court granted the
Company's motion to dismiss as to claims arising out of the Cat
Proceeding, as well as Noerr-Pennington immunity for the patent
litigation in the Cat Proceeding and the obtaining of certain
product standards, among other matters, and dismissed plaintiffs'
claims that the acquisition by the Company of a number of its
licensees constituted anti-competitive practices. The court
further ordered the plaintiffs to refile an amended complaint
alleging with factual particularity any timely claims for tortious
interference with business and contractual relations and certain
antitrust injuries and other claims.

    In June 1998, plaintiffs refiled, as a new suit, their third
amended complaint (Inliner U.S.A. and CAT Contracting, Inc. v.
Insituform Technologies, Inc., Insituform Gulf South, Inc. and
Insituform East, Inc. [Civil Action H-98-20651] in the United
States District Court for the Southern District of Texas, Houston
<PAGE>
<PAGE>
Division), and repeated their previous antitrust and unfair
competition claims. In November 1999, plaintiffs dismissed with
prejudice all proceedings which had been pending. No payments or
other concessions were made by the Company.

    Ultraliner Proceeding.  In May 1999, the Company commenced an
action against Ultraliner, Inc. ("Ultraliner") and its licensee,
HydroTech, Inc. ("HydroTech"), in the United States District Court
for the Northern District of California (Civil Action No.
C-99-2429 CAL), alleging infringement by the defendants of six of
the Company's NuPipe patents in connection with Ultraliner's
manufacture and sale of its fold and formed pipe liner and its
installation by HydroTech. Ultraliner has subsequently served its
summons and complaint on the Company with respect to an action in
the Central District of Tennessee for a declaration of invalidity
of the Company's U.S. patent no. 4,867,921 covering the NuPipe
installation process. Pursuant to the Company's motion, in July
1999 the court ruled that the action should be transferred to the
Northern District of California. The parties are now engaged in
pretrial motions and discovery.

    Insituform East Proceeding.  In December 1999, the Company and
its subsidiary, Insituform (Netherlands) B.V., initiated
proceedings against Insituform East, Midsouth and certain of their
affiliates in the United States District Court for the Middle
District of Tennessee (Civil Action No. 3-99-1130), alleging,
among other matters, trademark violations and a non-curable breach
of the Settlement Agreement dated July 20, 1999 (the "Settlement
Agreement") relating to the Company's withdrawal from Midsouth.
The Company seeks a declaration that it may terminate its grant
under the Settlement Agreement to a subsidiary of Insituform East
of the non-exclusive right in Midsouth's prior assigned territory
to utilize the Company's cured-in-place process and technology, in
the condition and state it was commercially practiced on the date
of settlement, under Midsouth's prior Insituform Process license
that was then terminated.

    In addition, the Company seeks a declaratory judgment and
injunctive relief regarding, among other things: (i) the inability
of Insituform East to practice the Insituform Process outside the
territories assigned to Insituform East under its licenses from
the Company, (ii) the inability of Insituform East or its
affiliates to practice cured-in-place pipe rehabilitation
techniques other than the Insituform Process, and (iii) the
obligation of Insituform East to pay cross-over royalties to the
Company on Insituform Process and other cured-in-place work
permitted by the Company and performed within the scope of the
subject matter of Insituform East's licenses from the Company and
outside Insituform East's assigned territories. The Company
further seeks a declaration that, as a result of the termination
of certain Insituform licenses previously granted to companies
that have since been acquired by, and merged into, the Company,
the Company is not obligated to continue payment of certain
<PAGE>
<PAGE>
finder's fees to Insituform East that were to continue while the
subject licenses remained in effect.

    Defendants have filed an answer and counterclaim denying the
material allegations of the Company's complaint and seek, among
other things, declarations and injunctions essentially the
opposite of those requested by the Company.

    Other.  The Company is involved in certain additional
litigation incidental to the conduct of its business and affairs.
Management does not believe that the outcome of any such
litigation will have a material adverse effect on the financial
condition or results of operations of the Company.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

    Not applicable.

                             PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY
        AND RELATED STOCKHOLDER MATTERS

    (a)   The Company's class A common stock, $.01 par value
("Common Stock"), is traded in the over-the-counter market under
the symbol "INSUA." The following table sets forth the range of
quarterly high and low sales prices commencing after December 31,
1997, as reported on The Nasdaq Stock Market. Quotations represent
prices between dealers and do not include retail mark-ups,
mark-downs or commissions.

    Period                       High          Low
    ------                       ----          ---
   1999
        First Quarter            $17.50      $14.00
        Second Quarter            21.63       16.00
        Third Quarter             25.25       19.13
        Fourth Quarter            32.44       20.63

    Period                       High          Low
    ------                       ----          ---
   1998
        First Quarter            $11.50      $ 7.75
        Second Quarter            14.25       10.63
        Third Quarter             15.75       11.88
        Fourth Quarter            14.50        9.25


        As of March 1, 2000, the number of record holders of the
Company's Common Stock was 1,256.


<PAGE>
<PAGE>
        Holders of Common Stock are entitled to receive dividends
as and when they may be declared by the Company's Board of
Directors. The Company has never paid a cash dividend on the
Common Stock. The Company's present policy is to retain earnings
to provide for the operation and expansion of its business.
However, the Company's Board of Directors will review the
Company's dividend policy from time to time and will consider the
Company's earnings, financial condition, cash flows, financing
agreements and other relevant factors in making determinations
regarding future dividends, if any. Under the terms of certain
debt arrangements to which the Company is a party, the Company is
subject to certain limitations in paying dividends. See Note 8 of
the Notes to the Company's Consolidated Financial Statements
included in response to "Item 14. Exhibits, Financial Statement
Schedules, and Reports on Form 8-K" and "Item 7. Management's
Discussion and Analysis of Financial Condition and Results of
Operations-Liquidity," which information is incorporated herein by
reference.

    (b) Not applicable.

ITEM 6. SELECTED FINANCIAL DATA

        The selected financial data set forth below have been
derived from the Company's consolidated financial statements
referred to under "Item 14. Exhibits, Financial Statement
Schedules, and Reports on Form 8-K" of this Annual Report on Form
10-K, and previously published historical financial statements not
included in this Annual Report on Form 10-K. In October 1995, the
Company consummated the acquisition of IMA, which the Company has
accounted for as a pooling-of-interests and, accordingly, the
historical financial statements of the combining companies have
been retroactively combined (after adjustments to eliminate
intercompany balances and transactions, and to conform reporting
periods and accounting methods) as if the companies had operated
as a single entity for the periods presented. Certain historical
financial data of IMA have been reclassified to conform to the
Company's accounting policies. The selected financial data set
forth below should be read in connection with "Item 7.
Management's Discussion and Analysis of Financial Condition and
Results of Operations" and the Company's consolidated financial
statements, including the notes thereto, referred to herein.

<PAGE>
<PAGE>
<TABLE>
<CAPTION>
                                                      Unaudited
                                               Year Ended December 31,
                              -----------------------------------------------------
                             1999          1998       1997         1996        1995(1)
                                -----         ----       ----         -----       -------
                                        (in thousands, except per share amounts)
<S>                         <C>            <C>           <C>          <C>         <C>
INCOME STATEMENT DATA:
Revenues..................  $339,883       $300,958      $320,640     $289,933    $272,203
Operating income..........    50,669         38,688        25,030       14,346      11,750(2)
Income (loss) from
 continuing operations....    25,983         17,887         9,644        4,492        (966)(3)
Net income (loss).........    25,983         17,887         9,419        4,492        (966)
Basic earnings (loss)
 per share:
 Income (loss) from
  continuing operations...      1.02            .67           .36          .17        (.04)
 Net income (loss)........      1.02            .67           .35          .17        (.04)
Dilutive earnings (loss)
 per share:
 Income (loss) from con-
  tinuing operations.......     1.00            .66           .36          .17         (.04)
 Net income (loss).........     1.00            .66           .35          .17         (.04)

BALANCE SHEET DATA:

Working capital...........   120,180        121,956       114,283       78,876       69,538
Current assets............   174,372        170,105       161,273      130,372      120,711
Property and equipment....    54,188         56,421        57,983       57,266       59,773
Total assets..............   311,625        304,608       297,852      265,502      260,300
Long-term debt............   114,954        112,131       111,440       82,384       82,813

Total liabilities.........   170,314        161,395       162,705      136,664      137,845
Total common stock and
 other stockholders'
 equity..................    138,603        139,505       131,502      123,203      116,810

___________________
(1)   The Company has completed various acquisitions which have been accounted for under
      the purchase method of accounting, including the pipeline rehabilitation business of
      Enviroq Corporation and two-thirds of Insituform France S.A. in 1995, Video Injection
      S.A. in 1998 and Insituform Rioolrenovatietechnieken B.V. in 1999.

(2)   Reflects $6.5 million in costs associated with the acquisition of IMA, which have been
      charged to operations primarily in the fourth quarter of 1995, and a pre-tax charge
      in the amount of $8.1 million for restructuring costs, primarily for consolidation
      of corrosion and abrasion protection operations, rationalization of Canadian
      operations to one facility, elimination of duplicative management positions,
      relocation of certain domestic employees and functions, and termination of
      construction of proposed manufacturing capacity.

(3)   In 1995 the Company settled certain outstanding litigation for a cash payment of $3.2
      million and issuance of 30,000 shares of its Common Stock, resulting in an after-tax
      charge against earnings of approximately $2.2 million.
</TABLE>
<PAGE>
<PAGE>

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF
        FINANCIAL CONDITION AND RESULTS OF OPERATIONS

GENERAL

     The Company's rehabilitation revenues are derived primarily
from direct installation and other contracting activities,
generated by the Company's subsidiaries operating in the United
States, Canada, France, the United Kingdom, the Netherlands,
Japan, Spain, Chile, Argentina and Mexico, and include product
sales to, and royalties and license fees paid by, the Company's
unaffiliated Insituform licensees and sub-licensees and its
unaffiliated NuPipe licensees. During the three years ended
December 31, 1999, 1998 and 1997, approximately 76.4%, 63.8% and
62.5%, respectively, of the Company's consolidated revenues
related to the Insituform Process.

RESULTS OF OPERATIONS

     Year Ended December 31, 1999, Compared to Year Ended
        December 31, 1998

     Total revenues increased 12.9% to $339.9 million from $301.0
million in 1998. The principal reason for the growth was increased
volume from the Company's rehabilitation operations within North
America and Europe and its tunneling operations. The majority of
growth in Europe came from the June 1999 acquisition of the
Company's Dutch licensee. Revenues of the Company's TiteLiner
operations (consisting of corrosion and abrasion protection
activities primarily in the United States, Canada and Latin
America) decreased $20.0 million, or 46.1%, compared to 1998,
primarily due to realigning the business to its core lining work
and exiting from lower margin steel contracting work. Fluctuations
in currency exchange rates did not have a material impact on
revenues in 1999.

     The Company's gross profit increased 18.8% to $118.7 million
from $99.9 million in 1998, primarily due to increased revenues as
well as increased profitability from the Company's North American
and European rehabilitation operations and the Company's tunneling
operations. The overall gross profit margin for 1999 was 34.9%
compared to 33.2% in 1998. This improved profitability was due to
improved productivity and efficiencies in the North American
rehabilitation and tunneling operations, offset partially by a
decrease in gross profit from the Company's TiteLiner operations,
due to the revenue volume decrease, together with decreased
profitability caused by difficulties in Chile on a major project.

     In 1999, operating costs and expenses increased 11.1% to
$68.0 million from $61.2 million in 1998. The change was primarily
due to increased North American rehabilitation administration
costs to meet current and future growth demands, increased legal
costs and ongoing costs related to the Company's information
<PAGE>
<PAGE>
systems improvements. As a percentage of revenues, operating costs
and expenses decreased slightly compared to the prior year, to
20.0% in 1999 compared to 20.3% in 1998, primarily as a result of
the increase in revenues at a higher rate than operating expenses.

     Interest expense in 1999 decreased 0.7% to $9.0 million from
$9.1 million in 1998. The relatively flat interest expense is due
to the fixed rate on the Company's principal long-term debt, with
a slight decrease in interest rates on revolving credit borrowings
in the Company's subsidiaries.

     Other income increased in 1999 to $3.8 million from $2.3
million in 1998. The change was due to increased investment income
resulting from the higher average invested cash balances and
improved returns compared to 1998, and gains from selling excess
equipment that related to steel contracting work in North American
TiteLiner operations.

     In 1999, taxes on income increased 44.3% to $18.9 million
from $13.1 million in 1998, due principally to a $13.6 million
increase in income before taxes. The Company's effective tax rate
was 41.6% in 1999 compared to 41.1% in 1998, primarily due to the
higher state income taxes in resulting from larger United States
income. As indicated in Note 12 of the Notes to Consolidated
Financial Statements included in response to "Item. 14 Exhibits,
Financial Statement Schedules and reports on Form 8-K", the 1999
and 1998 effective tax rates were higher than the United States
federal statutory rate, primarily due to non-deductibility of
goodwill amortization associated with acquisitions, which is
generally not deductible for tax purposes, and the effect of
higher tax rates on foreign income earned.

     Since July 1999, the Company ceased recording losses on its
equity position in Midsouth as a result of the withdrawal from
Midsouth.

     As a result of the foregoing, net income for 1999 increased
45.3% to $26.0 million, representing a 7.6% return on revenue,
compared to $17.9 million for 1998, when a 5.9% return on revenue
was achieved. Also, return on average stockholders' equity
increased to 18.7% compared to 13.2% in 1998.

     Year Ended December 31, 1998, Compared to Year Ended
      December 31, 1997

     Total revenues decreased 6.1% to $301.0 million from $320.6
million in 1997. The principal reason for the decline was
decreased volume from the Company's TiteLiner operations in the
United States and Latin America of $18.9 million. The Company's
pipe rehabilitation operations also experienced an overall decline
in revenues due to the elimination of non-core projects, such as
cleaning and inspection. For the year ended December 31, 1998, as
a result of the management committee composition of Midsouth, the
Company accounted for its investment therein on an equity basis,
<PAGE>
<PAGE>
which resulted in revenue of $0.5 million in 1998, compared to
$2.1 million in 1997, during which Midsouth's results were
consolidated with the Company prior to April 1997. The Company's
revenues were bolstered by increased Insituform product sales and
steel pipe sales from the Company's corrosion and abrasion
operations. Fluctuations in currency exchange rates did not have
a material impact on revenues in 1998.

     The Company's gross profit increased 5.7% to $99.9 million
from $94.5 million in 1997, primarily due to improved gross profit
from the Company's North American and European pipeline
rehabilitation operations. This improvement was offset somewhat by
a decrease in gross profit from the Company's corrosion and
abrasion operations due to the revenue volume decrease. The
overall gross profit margin for 1998 was 33.2% compared to 29.5%
in 1997, primarily due to improvements made in productivity and
efficiency in the Company's pipeline rehabilitation operations.
Much of this improvement came as a result of extensive
reorganization during 1997, where management rationalized field
crews and equipment throughout the organization. In addition, in
1998 proportionately more projects with favorable margins were
undertaken, as a result of the elimination of lower margin non-
core projects such as cleaning and inspection, which was coupled
with improved pricing on core pipeline rehabilitation projects.

     In 1998, operating costs and expenses decreased 11.9% to
$61.2 million from $69.5 million in 1997. This decrease was due to
cost savings gained from the reorganization of the Company's
pipeline rehabilitation operations through elimination of
positions, facilities, and realignment of responsibilities, along
with the consolidation of the Company's headquarters in
Chesterfield. These decreases were offset by increases in spending
related to information systems, research and development and
patent related activities. As a percentage of revenues, operating
costs and expenses decreased in 1998 to 20.3% from 21.7% in 1997.

     In 1997, the Company recorded in operating expense an unusual
item of $4.0 million for employee severance and costs of moving
employees and offices related to the restructuring of its
corporate headquarters and other facilities, which did not recur
in the current year. The Company also recorded $0.6 million (prior
to any effect of taxes) in operating costs and expenses in
settling a proxy contest attendant to the annual stockholders
meeting. The contest was initiated by a group that included two
directors of the Company.

     Interest expense in 1998 increased 3.4% to $9.1 million from
$8.8 million in 1997, due primarily to the effect of borrowings
resulting from the senior note financing completed in February
1997. See "Liquidity and Capital Resources" below.


<PAGE>
<PAGE>
     Other income increased in 1998 to $2.3 million from $0.6
million in 1997, due principally to increased investment income of
$1.3 million, resulting from more invested cash and cash
equivalents in 1998.

     In 1998, taxes on income increased 84.5% to $13.1 million
from $7.1 million in 1997, due principally to an increase of $14.9
million in income before taxes. The Company's 1998 effective tax
rate was 41.1%, as compared to 41.7% in 1997. This decrease was
principally due to a more favorable mix of income generated in
jurisdictions with lower tax rates in 1998 compared to 1997.

     In February 1997, as a result of the closing of the Company's
senior note financing, certain previous debt facilities were
retired. Costs of $0.4 million ($0.2 million after-tax benefits)
associated with these debt facilities which were capitalized, such
as commitment fees and legal costs, were written off. This expense
was classified as extraordinary in the Company's results of
operations for 1997.

     As a result of the foregoing, net income for 1998 increased
90% to $17.9 million, representing a 5.9% return on revenue,
compared to $9.4 million for 1997 when a 2.9% return on revenue
was achieved. The Company also achieved a substantial improvement
in return on average stockholders' equity of 13.2% for 1998, as
compared to 7.4% for 1997.

LIQUIDITY AND CAPITAL RESOURCES

     At December 31, 1999, the balance of cash, U.S. Treasury
bills, and short-term investments was $68.2 million, compared to
$76.9 million at December 31, 1998. The decrease in cash and cash
equivalents resulted primarily from the Company's previously
reported stock repurchase program, which used cash in the amount
of $32.0 million in 1999. In addition, there were cash outlays for
capital spending of $11.7 million, and $11.8 million for the
acquisition of the Company's Dutch licensee. These cash outlays
were partially offset by a positive generation of cash from
operating activities of $34.4 million and proceeds from long-term
debt of $6.1 million incurred to finance the Dutch acquisition.
Working capital was $120.2 million at December 31, 1999, compared
to $122.0 million at December 31, 1998.

     Trade receivables, together with costs and estimated earnings
in excess of billings and retainage under construction contracts,
increased 13.1%, to $84.2 million, from $74.4 million at December
1998, while revenues grew 12.9% compared to last year, which
contributed to the small change in working capital. The collection
of installation receivables involves contractual provisions for
retainage by the project owner, often 5% to 15% of the contract
amount, which extends the collection process. Collections are also
sometimes further prolonged by the slow review processes often
employed by the Company's municipal customers. In the United
<PAGE>
<PAGE>
States, retainage receivables are generally received within 60 to
90 days after the completion of a contract.

     Capital expenditures were $11.7 million in 1999, compared to
$13.4 million in 1998. Capital expenditures generally reflect
replacement equipment required by the Company's installation
operations. In 1999, capital expenditures also reflect $0.5
million related to the completion of the Company's new training
center.

     While the Company expects that routine capital spending will
continue at the current level in the foreseeable future, the
Company is pursuing several information system improvement
initiatives that will require increased expenditures during the
next several years. These initiatives, which began principally in
1997, include anticipated expenditures of approximately $1.6
million in connection with the installation of an electronic data
collection system in each of the Company's North American
rehabilitation operations, of which $0.9 million was expended
during 1999. In addition, the Company intends to implement new
information systems in its European subsidiaries. The Company
plans to increase expenditures to meet rising volume demands,
which relate to expansion of field crew capacity as well as
production improvements to manufacturing facilities.

     In June 1999, the Company completed its acquisition of all
the shares of its exclusive licensee of the Insituform Process in
the Netherlands, now named Insituform Rioolrenovatietechnieken
B.V.  The purchase price was NGL 25 million (approximately US
$11.8 million), which was paid in cash at closing. Included in the
acquisition was a 10% stockholding owned by the licensee in
Linings. In November 1999, the Company's share of Linings
increased to 75% as a result of share redemptions effectuated by
Linings, for an approximate redemption price of $1.5 million. In
January 2000, the Company acquired the rights to the Thermopipe
Process not previously licensed to it for approximately $0.7
million.

     During 1999, the Company paid an installment of $0.6 million
on the purchase price of the minority interest in the Company's
Chilean subsidiary acquired in the prior year, and will pay the
remaining installment of $0.5 million during the current year.
During 1999, the Company paid an installment of $1.3 million on
the purchase price of the majority interest in Video Injection
acquired in the prior year, and will pay the remaining installment
of $1.3 million in the current year. The Company remains obligated
to purchase the remaining 20% of the shares of Video Injection
pursuant to a formula based on Video Injection's results of
operations. In connection with its settlement relating to
Midsouth, during 1999 the Company also received an aggregate of
$1.7 million, consisting of the book value of its investment in
Midsouth and repayments of amounts advanced.

<PAGE>
<PAGE>
     In February 2000, the Company acquired the rights to the
Insituform Process and NuPipe Process for the states of New York
and New Jersey, through the purchase of all of the shares of the
capital stock of Insituform Metropolitan, Inc. and the operating
assets of certain of its affiliates. At closing, the Company paid
the sellers or delivered into escrow an aggregate of $4.3 million
in cash, in addition to assuming operating liabilities of the
acquired business. The remainder of the purchase price (which is
estimated at $5.2 million, inclusive of closing payments) will be
paid after adjustments for net assets to be shown in a closing
balance sheet of the acquired business.

     Financing activities used $23.6 million in 1999, as compared
to cash used of $11.2 million in 1998. In mid-1998, the Company
authorized the repurchase of up to 2,700,000 shares of the
Company's Common Stock to be made from time to time over five
years in open market transactions. The amount and timing of
purchases are dependent upon a number of factors, including the
price and availability of the Company's shares, general market
conditions and competing alternative uses of funds, and may be
discontinued at any time. In October 1999, the Company increased
the original authorization by an additional 2,000,000 shares of
Common Stock through the period ending June 2003. During 1999, the
Company used cash in the amount of $32.0 million for the
repurchase of 1,752,400 shares. The Company has used cash in the
cumulative amount of $41.8 million for the repurchase of 2,488,300
shares through December 31, 1999, since inception of the stock
repurchase program. The repurchased shares will be held as
treasury stock.

     In 1999, the Company made principal payments on debt totaling
$2.3 million, compared to $1.8 million in 1998. The Company, in
1999, generated $5.0 million from the issuance of common stock
from stock options granted to employees, as compared to $0.8
million in 1998.

     The Company's $110 million principal amount of Senior Notes,
Series A, due February 14, 2007 (the "Senior Notes"), bear
interest, payable semi-annually in August and February of each
year, at the rate per annum of 7.88%. Each year, from February
2001 to February 2006, inclusive, the Company will be required to
make principal payments of $15.7 million, together with an
equivalent payment at maturity. The Senior Notes may be prepaid at
the Company's option, in whole or in part, at any time, together
with a make-whole premium, and upon specified change in control
events each holder has the right to require the Company to
purchase its Senior Note without any premium thereon.

     The Company has a credit agreement (the "Credit Agreement")
whereby the lender will make available to the Company, until
September 1, 2001 (the "Maturity Date"), a revolving credit line
of up to $20,000,000 aggregate principal amount for working
capital and permitted acquisitions, including $10,000,000
available for standby and commercial letters of credit. Interest
<PAGE>
<PAGE>
on outstanding advances accrues, at the election of the Company,
at either the lender's prime rate, payable monthly, or its LIBOR
rate, plus a margin ranging from .5% to 1.5% depending on the
maintenance of certain financial ratios, payable at the end of
selected interest periods (from one to six months). Outstanding
principal is subject to repayment on the Maturity Date, except
that advances for permitted acquisitions must be repaid within six
months after disbursement.

     The note purchase agreements pursuant to which the Senior
Notes were acquired, and the Credit Agreement, obligate the
Company to comply with certain financial ratios and restrictive
covenants that, among other things, place limitations on
operations and sales of assets by the Company or its subsidiaries,
and limit the ability of the Company to incur further secured
indebtedness and liens and of subsidiaries to incur indebtedness,
and, in the event of default, limit the ability of the Company to
pay cash dividends or make other distributions to the holders of
its capital stock or to redeem such stock. The Credit Agreement
also obligates certain of the Company's domestic subsidiaries to
guaranty the Company's obligations, as a result of which the same
subsidiaries have also delivered their guaranty with respect to
the Senior Notes.

     In July 1999, the Company borrowed EUR 5,672,000 in order to
refinance a portion of the purchase price for its Dutch licensee.
Such amount is repayable in seven equal installments annually on
each July 31, and accrues interest, payable quarterly, at the rate
of 5.5% per annum.

     The Company anticipates replacement of the Credit Agreement
with a new facility with the same lender, providing for advances
to the Company of up to $50,000,000 aggregate principal amount for
working capital and permitted acquisitions (including $30,000,000
available for standby and commercial letters of credit, on a
revolving basis through 2004, at which time principal will be
repayable). Interest on outstanding advances will accrue, at the
election of the Company, at either the lender's prime rate, the
federal funds rate plus .5%, or the lender's offshore rate plus a
margin ranging from .5% to 1.5% depending on the maintenance of
certain financial ratios, and be payable quarterly. The new
facility will be guaranteed by the Company's domestic subsidiaries
under arrangements similar to those required by the Credit
Facility.

     Management believes its current working capital and
additional facilities will be adequate to meet its requirements
for the foreseeable future.


<PAGE>
<PAGE>
YEAR 2000

     The "year 2000" problem relates to computer systems that have
time and date-sensitive programs that were designed to read years
beginning with "19," but may not properly recognize the year 2000.
If a computer system or software application used by the Company
or a third party dealing with the Company fails because of the
inability of the system or application to properly read the year
"2000," the results may adversely affect the Company.

     Accordingly, prior to December 31, 1999, the Company reviewed
its internal computer programs and systems, and reviewed and
analyzed voice and data communications systems, building systems,
manufacturing and operations equipment with embedded components
(including HVAC, security and fire protection), and field
operations equipment to ensure the reliability of operational
systems and manufacturing processes, both in North America and in
Europe. As a result, the Company formulated a year 2000 compliance
program so as to address any significant issues in a timely
manner. The Company's plan included formal communications with
representatives from significant outside parties that transact
with the Company to determine the extent of vulnerability of the
Company to any failure to remediate their own year 2000 issues.

     The Company has addressed any internal year 2000 issues
through either replacement of old systems with new year 2000
compliant systems or modifications to existing systems. The
Company has not identified any material difficulties presented by
its major customers or suppliers, has not experienced any material
business interruption in connection with year 2000 difficulties
and has not incurred any material expense in connection with its
year 2000 compliance plan.

MARKET RISK

     The Company conducts its rehabilitation activities on a
worldwide basis, giving rise to exposures related to changes in
foreign currency exchange rates. For example, foreign currency
exchange rate movements may create a degree of risk to the
Company's operations by affecting: (i) the U.S. dollar value of
sales made in foreign currencies, and (ii) the U.S. dollar value
of costs incurred in foreign currencies. In addition, the Company
is exposed to market risks related to changes in interest rates.
The Company's objective is to minimize the volatility in earnings
and cash flow from these risks.

     The Company has selectively used, and will continue to use,
forward exchange contracts in order to manage its currency
exposure. Forward exchange contracts are executed by the Company
only with large, reputable banks and financial institutions and
are denominated in currencies of major industrial countries. Given
its assessment of such risk, the Company has not deemed it
necessary to offset any interest rate exposure. Furthermore, the
<PAGE>
<PAGE>
Company does not enter into transactions involving derivative
financial instruments for speculative trading purposes.

     Based on the Company's overall currency exchange rate and
interest rate exposure at December 31, 1999, a 10% weakening in
the U.S. dollar across all currencies or 10% increase in interest
rates would not have a material impact on the financial position,
results of operations or cash flows of the Company. These effects
of hypothetical changes in currency exchange rates and in interest
rates, however, ignore other effects the same movement may have
arising from other variables, and actual results could differ from
the sensitivity calculations of the Company. The Company regularly
assesses these variables, establishes policies and business
practices to protect against the adverse effects of foreign
currency and interest rate fluctuations and does not anticipate
any material losses generated by these risks.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES
         ABOUT MARKET RISK

     For information concerning this item, see "Item 7.
Management's Discussion and Analysis of Financial Condition and
Results of Operations-Market Risk," which information is
incorporated herein by reference.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

          For information concerning this item, see "Item 14.
Exhibits, Financial Statement Schedules, and Reports on Form 8-K,"
which information is incorporated herein by reference.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
        ACCOUNTING AND FINANCIAL DISCLOSURE

          Not applicable.

                            PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

          For information concerning this item, see "Item 1.
Business-Executive Officers" and the Proxy Statement to be filed
with respect to the 2000 Annual Meeting of Stockholders (the "2000
Proxy Statement"), which information is incorporated herein by
reference.

ITEM 11. EXECUTIVE COMPENSATION

          For information concerning this item, see the 2000 Proxy
Statement, which information is incorporated herein by reference.
<PAGE>
<PAGE>
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
         MANAGEMENT

          For information concerning this item, see the 2000 Proxy
Statement, which information is incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

          For information concerning this item, see the 2000 Proxy
Statement, which information is incorporated herein by reference.

                             PART IV


ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES,
         AND REPORTS ON FORM 8-K

          (a)  1. Financial Statements:

          The consolidated financial statements filed in this
Annual Report on Form 10-K are listed in the attached Index to
Consolidated Financial Statements and Schedules.

               2. Financial Statement Schedules:

          No Financial Statement Schedules are included herein
because they are not required or are not applicable or the
required information is contained in the consolidated financial
statements or notes thereto.

               3. Exhibits:

          The exhibits required to be filed as part of this Annual
Report on Form 10-K are listed in the attached Index to Exhibits.

          (b) Current Reports on Form 8-K:

          During the quarter ended December 31, 1999, the Company
filed a Current Report on Form 8-K dated October 6, 1999 which,
under "Item 5. Other Events" thereunder, reported the settlement
of certain litigation, and a Current Report on Form 8-K dated
October 21, 1999 which, under "Item 5. Other Events" thereunder,
announced the expansion of its existing stock repurchase program.
The Company also filed a Current Report on Form 8-K dated February
2, 2000 reporting its acquisition of the rights to the Insituform
Process and the NuPipe Process for the States of New York and New
Jersey. No financial statements were filed as part of any such
report.


<PAGE>
<PAGE>
                        POWER OF ATTORNEY

          The registrant and each person whose signature appears
below hereby appoint Anthony W. Hooper, Robert L. Kelley and
Joseph A. White as attorneys-in-fact with full power of
substitution, severally, to execute in the name and on behalf of
the registrant and each such person, individually and in each
capacity stated below, one or more amendments to the annual report
which amendments may make such changes in the report as the
attorney-in-fact acting deems appropriate and to file any such
amendment to the report with the Securities and Exchange
Commission.

                           SIGNATURES

          Pursuant to the requirements of Section 13 or 15(d) of
the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned,
thereunto duly authorized.

Dated: March 24, 2000         INSITUFORM TECHNOLOGIES, INC.


                               By s/Anthony W. Hooper
                                  --------------------------------
                                  Anthony W. Hooper
                                   President and Chief Executive
                                   Officer


          Pursuant to the requirements of the Securities Exchange
Act of 1934, this report has been signed below by the following
persons on behalf of the registrant and in the capacities and on
the dates indicated:


Signature                        Title               Date


s/Anthony W. Hooper
- -----------------------
Anthony W. Hooper         Principal Executive     March 24, 2000
                          Officer and Director

s/Joseph A. White
- -----------------------
Joseph A. White           Principal Financial     March 24, 2000
                          and Accounting Officer

s/Robert W. Affholder
- -----------------------
Robert W. Affholder       Director                March 24, 2000



<PAGE>

s/Paul A. Biddelman
- -----------------------
Paul A. Biddelman         Director                March 24, 2000


s/Stephen P. Cortinovis
- -----------------------
Stephen P. Cortinovis     Director                March 24, 2000


s/Juanita Hinshaw
- -----------------------
Juanita Hinshaw           Director                March 24, 2000


s/Thomas Kalishman
- -----------------------
Thomas Kalishman          Director                March 24, 2000


s/Sheldon Weinig
- -----------------------
Sheldon Weinig            Director                March 24, 2000


s/Russell B. Wight, Jr.
- -----------------------
Russell B. Wight, Jr.     Director                March 24, 2000


s/Alfred L. Woods
- -----------------------
Alfred L. Woods           Director                March 24, 2000


<PAGE>
<PAGE>
                  INDEX TO FINANCIAL STATEMENTS



Report of Independent Public Accountants............   F-2

Report of Management.................................  F-3

Consolidated Statements of Operations for
  each of the three years in the period
  ended December 31, 1999............................  F-4

Consolidated Balance Sheets, December 31,
  1999 and 1998......................................  F-5

Consolidated Statements of Stockholders'
  Equity for each of the three years in
  the period ended December 31, 1999.................  F-6

Consolidated Statements of Cash Flows
  for each of the three years in the
  period ended December 31, 1999.....................  F-7

Notes to Consolidated Financial Statements...........  F-8


     No Financial Statement Schedules are included herein because
they are not required or not applicable or the required information
is contained in the consolidated financial statements or notes
thereto.























                               F-1
<PAGE>
<PAGE>

            REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


To the Board of Directors and the Shareholders of
Insituform Technologies, Inc.:

We have audited the accompanying consolidated balance sheets of
Insituform Technologies, Inc. and subsidiaries as of December 31,
1999 and 1998, and the related consolidated statements of income,
stockholders' equity and cash flow for each of the three years in
the period ended December 31, 1999.  These financial statements
are the responsibility of the Company's management.  Our
responsibility is to express an opinion on these financial
statements based on our audits.

We conducted our audits in accordance with auditing standards
generally accepted in the United States.  Those standards require
that we plan and perform the audit to obtain reasonable assurance
about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements.  An audit also includes assessing the accounting
principles used and significant estimates made by management, as
well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, the financial statements referred to above present
fairly, in all material respects, the financial position of
Insituform Technologies, Inc. and subsidiaries as of December 31,
1999 and 1998, and the results of its operations and its cash
flows for each of the three years in the period ended December 31,
1999, in conformity with accounting principles generally accepted
in the United States.



ARTHUR ANDERSEN LLP



St. Louis, Missouri,
 February 15, 2000







                               F-2
<PAGE>
<PAGE>


REPORT OF MANAGEMENT


Management is responsible for the preparation, integrity and
objectivity of financial information included in this annual
report.  The financial statements have been prepared in
conformity with accounting principles generally accepted in the
United States applied on a consistent basis.

The preparation of financial statements in conformity with
accounting principles generally accepted in the United States
requires management to make estimates and assumptions that
affect the reported amounts.  Although the financial statements
reflect all available information and management's judgment and
estimates of current conditions and circumstances, and are
prepared with the assistance of specialists within and outside
the Company, actual results could differ from those estimates.

Management has established and maintains an internal control
structure to provide reasonable assurance that assets are
safeguarded against loss from unauthorized use or disposition,
that the accounting records provide a reliable basis for the
preparation of financial statements and that such financial
statements are not misstated due to material fraud or error.
Internal controls include the careful selection of associates,
the proper segregation of duties and the communication and
application of formal policies and procedures that are
consistent with high standards of accounting and administrative
practices.  An important element of this system is a
comprehensive internal audit program.

Management continually reviews, modifies and improves its
systems of accounting and controls in response to changes in
business conditions and operations and in response to
recommendations in the reports prepared by the independent
public accountants and internal auditors.

Management believes that it is essential for the Company to
conduct its business affairs in accordance with the highest
ethical standards and in conformity with the law.  This standard
is described in the Company's policies on business conduct,
which are publicized throughout the Company.



Anthony W. Hooper                            Joseph A. White
Chairman, President and                      Vice President and
Chief Executive Officer                      Chief Financial
                                             Officer

                               F-3
<PAGE>
<PAGE>
<TABLE>
           INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
           ----------------------------------------------
                  CONSOLIDATED STATEMENTS OF INCOME
                  ---------------------------------
<CAPTION>
        FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997
              (In thousands, except per share amounts)

                                                    1999        1998       1997
                                                   ------      ------     ------
<S>                                              <C>         <C>        <C>
REVENUES                                         $339,883    $300,958   $320,640

COST OF REVENUES                                  221,232     201,056    226,152
                                                 --------    --------   --------
GROSS PROFIT                                      118,651      99,902     94,488

OPERATING COSTS AND EXPENSES                       67,982      61,214     69,458
                                                 --------    --------   --------
OPERATING INCOME                                   50,669      38,688     25,030
                                                 --------    --------   --------
OTHER (EXPENSE) INCOME:
  Interest expense                                 (9,031)     (9,099)    (8,750)
  Other                                             3,797       2,270        647
                                                 --------    --------   --------
TOTAL OTHER EXPENSE                                (5,234)     (6,829)    (8,103)
                                                 --------    --------   --------
INCOME BEFORE TAXES ON INCOME                      45,435      31,859     16,927

TAXES ON INCOME                                    18,879      13,079      7,067
                                                 --------    --------   --------
INCOME BEFORE MINORITY INTERESTS
 AND EQUITY IN EARNINGS                            26,556      18,780      9,860

MINORITY INTERESTS                                   (837)       (849)      (519)

EQUITY IN EARNINGS (LOSSES) OF
 AFFILIATED COMPANIES                                 264         (44)       303
                                                 --------    --------   --------
INCOME BEFORE EXTRAORDINARY ITEM                   25,983      17,887      9,644

EXTRAORDINARY ITEM-Loss on early
 retirement of debt (net of income
 tax benefits of $142)                                  -           -       (225)
                                                 --------    --------   --------
NET INCOME                                       $ 25,983    $ 17,887   $  9,419
                                                 ========    ========   ========
EARNINGS PER SHARE OF COMMON STOCK
 AND COMMON STOCK EQUIVALENTS:
Net income per common share- basic-
Income before extraordinary item                 $   1.02    $    .67   $    .36
Extraordinary loss, net
 of income tax benefits                                 -           -       (.01)
                                                 --------    --------   --------
Net income per common share-basic              $   1.02    $    .67   $    .35
                                                 ========    ========   ========
Net income per common share-dilutive-
Income before extraordinary item                 $   1.00    $    .66   $    .36
Extraordinary loss, net of income tax benefits          -           -       (.01)
                                                 --------    --------   --------
Net income per common share - dilutive           $   1.00    $    .66   $    .35
                                                 ========    ========   ========
The accompanying notes are an integral part of the financial statements.
</TABLE>

                               F-4

<PAGE>
<TABLE>
           INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
           ----------------------------------------------

   CONSOLIDATED BALANCE SHEETS -- AS OF DECEMBER 31, 1999 AND 1998
              (In thousands, except share information)
<CAPTION>
                                                             1999         1998
                                                            ------       ------
                                   ASSETS
<S>                                                         <C>          <C>
CURRENT ASSETS:
 Cash and cash equivalents                                  $ 68,183     $ 76,904
 Receivables, net                                             58,546       52,280
 Retainage                                                    13,253       12,368
 Costs and estimated earnings in excess of billings           12,372        9,792
 Inventories                                                  12,525       11,282
 Prepaid expenses and other                                    9,493        7,479
                                                            --------     --------
         Total current assets                                174,372      170,105
                                                            --------     --------
PROPERTY AND EQUIPMENT, less accumulated depreciation         54,188       56,421
                                                            --------     --------
OTHER ASSETS:
 Goodwill, less accumulated amortization of
 $18,417 and $15,078, respectively                            64,077       56,504
 Other assets                                                 18,988       21,578
                                                            --------     --------
         Total other assets                                   83,065       78,082
                                                            --------     --------
         Total assets                                       $311,625     $304,608
                                                            ========     ========
                       LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
 Current maturities of long-term debt and notes payable     $  3,188     $  2,918
 Accounts payable and accruals                                51,004       45,231
                                                            --------     --------
         Total current liabilities                            54,192       48,149

LONG-TERM DEBT, less current maturities                      114,954      112,131

OTHER LIABILITIES                                              1,168        1,115
                                                            --------     --------
         Total liabilities                                   170,314      161,395
                                                            --------     --------
MINORITY INTERESTS                                             2,708        3,708
                                                            --------     --------
STOCKHOLDERS' EQUITY:
 Preferred stock, undesignated, $.10 par-
  shares authorized 2,000,000; none outstanding                    -            -
 Common stock, $.01 par-shares authorized
  40,000,000; shares outstanding 27,787,862
  and 27,302,304                                                 278          273
 Additional paid-in capital                                   74,809       68,931
 Retained earnings                                           112,338       86,355
 Treasury stock2,744,101 and 991,701 shares               (45,118)     (13,097)
 Cumulative foreign currency translation adjustments          (3,704)      (2,957)
                                                            --------     --------
          Total stockholders' equity                         138,603      139,505
                                                            --------     --------
          Total liabilities and stockholders' equity        $311,625     $304,608
                                                            ========     ========

The accompanying notes are an integral part of the financial statements.
</TABLE>

                                 F-5
<PAGE>
<TABLE>
               INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
               ----------------------------------------------
               CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
               -----------------------------------------------
            FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997
                   (In thousands, except number of shares)
<CAPTION>
                                     Common Stock       Additional
                                   -----------------     Paid-In      Retained    Treasury
                                   Shares     Amount     Capital      Earnings    Stock
                                   ------     ------    ----------    --------   --------
<S>                               <C>         <C>       <C>           <C>        <C>
BALANCE, December 31, 1996        27,144,331   $271     $ 67,824      $ 59,049   $ (3,269)

 Net income                            -          -          -           9,419        -
 Issuance of common stock upon
  exercise of options                 70,387      1          295            -         -
 Foreign currency translation
  adjustment                           -          -          -              -         -
                                  ----------   ----     --------      --------   --------

BALANCE, December 31, 1997        27,214,718    272       68,119        68,468     (3,269)

 Net income                            -          -          -          17,887        -
 Issuance of common stock upon
   exercise of options                87,586      1          812            -         -
 Common stock repurchased              -          -          -              -      (9,828)
 Foreign currency translation
   adjustment                          -          -          -              -         -
                                  ----------   ----     --------      --------   --------

BALANCE, December 31, 1998        27,302,304    273       68,931        86,355    (13,097)

 Net income                            -                     -          25,983        -
 Issuance of common stock upon
  exercise of options, including
  income tax benefit of $907         485,558      5        5,878            -         -
 Common stock repurchased              -          -          -              -     (32,021)
 Foreign currency translation
  adjustment                           -          -          -              -         -
                                  ----------   ----     --------      --------   --------

BALANCE, December 31, 1999        27,787,862   $278     $ 74,809      $112,338   $(45,118)
                                  ==========   ====     ========      ========   ========


Table continued on next page.

</TABLE>
<PAGE>
<PAGE>
<TABLE>
               INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
               ----------------------------------------------
               CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
               -----------------------------------------------
            FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997
                   (In thousands, except number of shares)
<CAPTION>
                                     Cumulative
                                   Foreign Currency        Total
                                     Translation       Stockholders'    Comprehensive
                                     Adjustments           Equity           Income
                                   ----------------    -------------    -------------
<S>                                <C>                 <C>              <C>
BALANCE, December 31, 1996         $  (672)            $123,203

 Net income                            -                  9,419         $  9,419
 Issuance of common stock upon
  exercise of options                  -                    296             -
 Foreign currency translation
  adjustment                        (1,416)              (1,416)          (1,416)
                                   -------             --------         --------

BALANCE, December 31, 1997          (2,088)             131,502         $  8,003
                                                                        ========
 Net income                            -                 17,887         $ 17,887
 Issuance of common stock upon
   exercise of options                 -                    813            -
 Common stock repurchased              -                 (9,828)           -
 Foreign currency translation
   adjustment                         (869)                (869)            (869)
                                   -------             --------         --------

BALANCE, December 31, 1998          (2,957)             139,505         $ 17,018
                                                                        ========
 Net income                            -                 25,983         $ 25,983
 Issuance of common stock upon
  exercise of options, including
  income tax benefit of $907           -                  5,883            -
 Common stock repurchased              -                (32,021)           -
 Foreign currency translation
  adjustment                          (747)                (747)            (747)
                                   -------             --------         --------

BALANCE, December 31, 1999         $(3,704)            $138,603         $ 25,236
                                   =======             ========         ========

  The accompanying notes are an integral part of the financial statements.
</TABLE>












                               F-6


<PAGE>
<TABLE>
               INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
               ----------------------------------------------
                    CONSOLIDATED STATEMENTS OF CASH FLOW
                    ------------------------------------
            FOR THE YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997
                               (In thousands)
<CAPTION>
                                                               1999       1998      1997
                                                               ----       ----      ----
<S>                                                           <C>        <C>        <C>
CASH FLOW FROM OPERATING ACTIVITIES:
 Net income                                                   $ 25,983   $ 17,887   $ 9,419
 Adjustments to reconcile net income to
  net cash provided by operating activities-
   Depreciation and amortization                                18,244     19,095    19,240
   Other                                                          (475)       266     1,311
   Deferred income taxes                                         1,689      1,174       728
   Changes in operating assets and liabilities,
    net of effects of businesses purchased-
     Receivables                                                (9,718)    13,247    (5,805)
     Inventories                                                (1,125)     1,049     2,766
     Prepaid expenses and other assets                          (3,703)     2,769       506
     Accounts payable and accruals                               3,484         69      (993)
                                                               -------    -------   -------
     Net cash provided by operating activities                  34,379     55,556    27,172
                                                               -------    -------   -------
CASH FLOW FROM INVESTING ACTIVITIES:
 Capital expenditures                                          (11,746)   (13,416)  (16,552)
 Purchases of businesses, net of cash acquired                 (11,325)    (1,451)      -
 Other investing activities                                      3,304      1,549    (1,661)
                                                               -------    -------   -------
       Net cash used in investing activities                   (19,767)   (13,318)  (18,213)
                                                               -------    -------   -------
CASH FLOW FROM FINANCING ACTIVITIES:
 Proceeds from issuance of common stock                          4,976        813       296
 Purchases of treasury stock                                   (32,021)    (9,828)      -
 Proceeds from long-term debt                                    6,050        124   110,515
 Principal payments on long-term debt                           (2,288)    (1,776)  (87,105)
 Minority interests                                                -          -        (178)
 Repayment of short-term borrowings                               (276)      (565)     (124)
                                                               -------    -------   -------
       Net cash (used in) provided by financing activities      (23,559)  (11,232)   23,404
                                                               --------   -------   -------
EFFECT OF EXCHANGE RATE CHANGES ON CASH                             226       164      (105)
                                                               -------    -------   -------
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS             (8,721)   31,170    32,258

CASH AND CASH EQUIVALENTS, beginning of year                     76,904    45,734    13,476
                                                               --------   -------   -------
CASH AND CASH EQUIVALENTS, end of year                         $ 68,183   $76,904   $45,734
                                                               ========   =======   =======
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
 Cash paid for-
  Interest                                                     $  8,852   $ 9,115   $ 5,849
  Income taxes                                                   17,593    13,223     1,686

NONCASH INVESTING AND FINANCING ACTIVITIES:
 Deferred consideration for businesses acquired                $    -     $ 3,671   $   -

  The accompanying notes are an integral part of the financial statements.

</TABLE>
                               F-7
<PAGE>
<PAGE>
         INSITUFORM TECHNOLOGIES, INC. AND SUBSIDIARIES
         ----------------------------------------------
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
           ------------------------------------------

1. DESCRIPTION OF BUSINESS:
   -----------------------

Insituform Technologies(R), Inc. (a Delaware corporation) and
subsidiaries (collectively, the "Company" or "ITI") is a
worldwide provider of proprietary trenchless technologies for
the rehabilitation and improvement of sewer, water, gas and
industrial pipes.  The Company's primary technology is the
Insituform(R) process, a "cured-in-place" pipeline
rehabilitation process.  The Company's TiteLiner(R) (TiteLiner)
process is a method of lining steel lines with a corrosion and
abrasion resistant pipe.  Through its Affholder(SM), Inc.
subsidiary, the Company is engaged in trenchless tunneling used
in the installation of new underground services.

2. SUMMARY OF ACCOUNTING POLICIES:
   ------------------------------

Principles of Consolidation
- ---------------------------

The consolidated financial statements include the accounts of
the Company and its majority-owned subsidiaries, including a
75%-owned United Kingdom subsidiary, Insituform(R) Linings Plc.;
a 55%-owned Mexican subsidiary, United Pipeline de Mexico, S.A.;
a 66 2/3%-owned French subsidiary, Insituform(R) France, S.A.
and an 80%-owned French subsidiary, Video Injection SA.  All
intercompany transactions and balances have been eliminated.
Investments in entities in which the Company has 20% to 50%
ownership are accounted for by the equity method.

Accounting Estimates
- --------------------

The preparation of financial statements in conformity with
generally accepted accounting principles requires management to
make estimates and assumptions that affect the reported amounts
of assets and liabilities and disclosure of contingent assets
and liabilities at the date of the financial statements and the
reported amounts of revenues and expenses during the reporting
period.  Actual results could differ from those estimates.

Taxes on Income
- ---------------

The Company provides for estimated income taxes payable or
refundable on current year income tax returns as well as the
estimated future tax effects attributable to temporary
differences and carryforwards, based upon enacted tax laws and
tax rates.
                               F-8
<PAGE>
<PAGE>
Foreign Currency Translation
- ----------------------------

Results of operations for foreign entities are translated using
the average exchange rates during the period.  Assets and
liabilities are translated to U.S. dollars using the exchange
rates in effect at the balance sheet date, and the related
translation adjustments are reported as a separate component of
stockholders' equity.

Cash and Cash Equivalents
- -------------------------

The Company classifies highly liquid investments with original
maturities of 90 days or less as cash equivalents.  Recorded
book values are reasonable estimates of fair value for cash and
cash equivalents.

Inventories
- -----------

Inventories are valued at the lower of cost (first-in,
first-out) or market.

Property, Equipment and Depreciation
- ------------------------------------

Property and equipment are stated at cost.  Depreciation on
property and equipment is computed using the straight-line
method over the following estimated useful lives:
                                                     Years
                                                     -----
     Land improvements                               15-20
     Buildings and improvements                       5-40
     Machinery and equipment                          4-10
     Furniture and fixtures                           3-10
     Autos and trucks                                 3-10

Intangibles
- -----------

The Company amortizes goodwill over periods not in excess of 25
years on the straight-line basis.

Long-Lived Assets
- -----------------

The Company reviews for impairment of long-lived assets whenever
events or changes in circumstances indicate that the carrying
amount of an asset may not be recovered from its undiscounted
future cash flows.



                               F-9

<PAGE>
<PAGE>
Revenues
- --------

Revenues include construction and installation revenues which
are recognized using the percentage-of-completion method.
Contract costs include all direct material and labor costs and
those indirect costs related to contract performance, such as
indirect labor, supplies, tools and equipment costs.  Changes in
estimated total contract costs are recognized in the period they
are determined.  Where a contract loss is forecasted, the full
amount of the anticipated loss is recognized in the period the
loss is determined.

Earnings Per Share
- ------------------

Earnings per share has been calculated using the following share
information:
<TABLE>
<CAPTION>
                                            1999        1998         1997
                                            ----        ----         ----
<S>                                     <C>          <C>          <C>
Weighted average number of common
 shares used for basic EPS              25,460,287   26,777,879   26,926,148

Effect of dilutive stock options
 and warrants                              619,245      280,180       46,900
                                        ----------   ----------   ----------
Weighted average number of common
 shares and dilutive potential
 common stock used in dilutive EPS      26,079,532   27,058,059   26,973,048
                                        ==========   ==========   ==========
</TABLE>

New Accounting Pronouncement
- ----------------------------

The Company intends to adopt SFAS 133, "Accounting for
Derivative Instrument and Hedging Activities," which establishes
accounting and reporting standards for derivative instruments
and hedging activities in 2001.  The Company believes that
SFAS 133 will not have a material impact on its results of
operations or financial position.

Reclassifications
- -----------------

Certain prior year amounts in the consolidated financial
statements have been reclassified to conform to the current year
presentation.

3. BUSINESS ACQUISITIONS:
   ---------------------

On June 1, 1999, the Company completed its acquisition of all of
the shares of its exclusive licensee of the Insituform Process

                              F-10
<PAGE>
in the Netherlands, now named Insituform(R) Rioolrenova-
tietechnieken B.V., from BFI Holdings B.V.  The purchase price
was NGL 25 million (approximately US $11.8 million), which was
paid in cash at closing.  The acquisition was accounted for by
the purchase method and resulted in goodwill of $10.8 million.

During the year ended December 31, 1998, the Company made
acquisitions which have been accounted for as purchases.  The
purchase prices totaling $7.1 million were allocated to tangible
assets and goodwill.

4. ALLOWANCE FOR DOUBTFUL ACCOUNTS:
   -------------------------------

Activity in the allowance for doubtful accounts is summarized as
follows for the years ended December 31 (in thousands):

<TABLE>
<CAPTION>
                                            1999       1998       1997
                                            ----       ----       ----
<S>                                       <C>        <C>        <C>
Balance, at beginning of period           $ 2,909    $ 2,587    $ 1,031
Charged to expense                            590      1,679      1,658
Uncollected balances written off,
 net of recoveries                           (403)    (1,357)      (102)
                                          -------    -------    -------
Balance, at end of period                 $ 3,096    $ 2,909    $ 2,587
                                          =======    =======    =======
</TABLE>

5. COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS:
   -----------------------------------------------------

Costs and estimated earnings on uncompleted contracts consist of
the following at December 31 (in thousands):

<TABLE>
<CAPTION>
                                                 1999            1998
                                                 ----            ----
<S>                                           <C>             <C>
Costs incurred on uncompleted contracts       $ 125,167       $ 111,204
Estimated earnings                               46,861          38,460
                                              ---------       ---------
                                                172,028         149,664
Less- Billings to date                         (166,904)       (145,278)
                                              ---------       ---------
                                              $   5,124       $   4,386
                                              =========       =========
Included in the accompanying
 balance sheets:
  Costs and estimated earnings in
    excess of billings                        $  12,372       $   9,792
  Billings in excess of costs and
    estimated earnings (Note 9)                  (7,248)         (5,406)
                                              ---------       ---------
                                              $   5,124       $   4,386
                                              =========       =========
</TABLE>
                              F-11

<PAGE>

Costs and estimated earnings in excess of billings represent
work performed which either due to contract stipulations or
lacking contractual documentation needed, could not be billed.
Substantially all unbilled amounts are expected to be billed and
collected within one year.

6. INVENTORIES:
   -----------

Inventories are summarized as follows at December 31 (in
thousands):

                                          1999          1998
                                          ----          ----
Raw materials                           $  1,827      $  1,542
Work-in-process                            3,750         2,959
Finished products                          1,594         1,144
Construction materials                     5,354         5,637
                                        --------      --------
                                        $ 12,525      $ 11,282
                                        ========      ========

7. PROPERTY AND EQUIPMENT:
   ----------------------

Property and equipment consists of the following at December 31
(in thousands):
                                           1999          1998
                                           ----          ----
Land and land improvements               $  2,800      $  2,621
Buildings and improvements                 22,679        21,928
Machinery and equipment                    83,143        81,283
Furniture and fixtures                      8,126         8,883
Autos and trucks                            5,925         4,822
Construction in progress                    4,997         3,731
                                         --------      --------
                                          127,670       123,268
Less-  Accumulated depreciation           (73,482)      (66,847)
                                         --------      --------
                                         $ 54,188      $ 56,421
                                         ========      ========

8. LONG-TERM DEBT AND NOTES PAYABLE:
   --------------------------------

Long-term debt consists of the following at December 31 (in
thousands):







                              F-12

<PAGE>
<TABLE>
<CAPTION>
                                                      1999            1998
                                                      ----            ----
<S>                                                 <C>           <C>
LONG-TERM DEBT:
 7.88% senior notes, payable in $15,715 annual
  installments beginning February 2001 through
  2007, with interest payable semiannually           $110,000      $110,000
 5.5% bank term loan, EUR5.7 million, payable
  in seven equal annual installments through
  July 2006, with interest payable quarterly            5,711          -
 Other notes, interest rates from 8.5% to
  9.6%                                                  2,431         5,049
                                                     --------      --------
                                                      118,142       115,049
Less-  Current maturities                              (3,188)       (2,918)
                                                     --------      --------
                                                     $114,954      $112,131
                                                     ========      ========
</TABLE>

The 7.88% senior notes may be prepaid at the Company's option,
in whole or in part, at any time, together with a make-whole
premium, and upon specified change in control events each holder
has the right to require the Company to purchase its senior
notes without any premium thereon.  The agreements obligate the
Company to comply with certain financial ratios and restrictive
covenants that, among other things, place limitations on
operations and sales of assets by the Company or its
subsidiaries, and limit the ability of the Company to incur
further secured indebtedness and liens.  Such agreements also
obligate the Company's subsidiaries to provide guarantees to the
holders of the senior notes if guarantees are given by them to
certain other lenders.

At December 31, 1999 and 1998, the estimated fair value of the
Company's long-term debt was approximately $112.4 million and
$111.6 million, respectively.

Principal payments required to be made for each of the next five
years and thereafter are summarized as follows (in thousands):

Years ending December 31                           Amount
- ------------------------                           ------

2000                                               $  3,188
2001                                                 16,590
2002                                                 16,531
2003                                                 16,531
2004                                                 16,531
After 2004                                           48,771
                                                   --------
Total                                              $118,142
                                                   ========



                              F-13

<PAGE>
The Company has the capacity to borrow up to $20,000,000 under
domestic committed lines of credit.  The line of credit facility
expires September 1, 2001.  There were no amounts outstanding on
the line of credit during 1999 or 1998.

9. ACCOUNTS PAYABLE AND ACCRUALS:
   -----------------------------

Accounts payable and accruals consist of the following at
December 31 (in thousands):

                                          1999           1998
                                          ----           ----

Accounts payable - trade               $ 13,902       $ 13,471
Compensation and profit sharing          12,288         10,515
Billings in excess of costs and
 estimated earnings                       7,248          5,406
Interest                                  3,318          3,219
Other                                    14,248         12,620
                                       --------       --------
                                       $ 51,004       $ 45,231
                                       ========       ========
10. STOCKHOLDERS' EQUITY:
    --------------------

Stock Option Plan
- -----------------

Under the 1992 Employee Stock Option Plan (the "Employee Plan")
and Director Stock Option Plan (the "Director Plan"), the
Company may grant options to its employees and directors not to
exceed 1,850,000 and 1,000,000 shares of common stock,
respectively.  The plans are administered by the Board of
Directors, which determines the timing of awards, individuals to
be granted awards, the number of options to be awarded and the
price, vesting schedule and other conditions of the options.
The exercise price of each option typically equals the closing
market price of the Company's stock on the date of grant and,
therefore, the Company generally makes no charge to earnings
with respect to these options.  Options generally vest over four
or five years and have an expiration date of up to five or ten
years after grant.  In February 2000, the Company's Board of
Directors, subject to stockholder approval, increased the number
of shares authorized for issuance under the Employee Plan and
the Director Plan to 2,850,000 and 1,500,000 shares,
respectively.

The Company applies APB Opinion No. 25, in accounting for stock
option grants.  In accordance with SFAS No. 123, the Company has
estimated the fair value of each option grant using the
Black-Scholes option-pricing model.  The following weighted
average assumptions were used for the grants in 1999, 1998 and
1997, respectively:  expected volatility of 41%, 46% and 45%;
risk-free interest rates of 6.4%, 5.1% and 5.8%; expected lives

                              F-14
<PAGE>
of five years and no dividends.  Had compensation cost for the
stock options granted been determined based on their fair value
at the grant dates, the Company's net income and earnings per
share would have been reduced to the pro forma amounts indicated
below (in thousands, except per share amounts):

                                  1999       1998       1997
Net income:                       ----       ----       ----
 As reported                    $25,983    $17,887     $9,419
 Pro forma                       24,404     16,833      8,867
Basic earnings per share:
 As reported                       1.02        .67        .35
 Pro forma                          .96        .63        .33
Dilutive earnings per share:
 As reported                       1.00        .66        .35
 Pro forma                          .94        .62        .33

The following tables summarize information about options
outstanding at December 31, 1999:
<TABLE>
<CAPTION>
                              Options Outstanding           Options Exercisable
                       --------------------------------   -----------------------
                                      Weighted
                                      Average       Weighted                   Weighted
                                      Remaining     Average                    Average
Range of                 Number       Contractual   Exercise      Number       Exercise
Exercise Price         Outstanding       Life        Price      Exercisable     Price
- --------------         -----------    -----------   --------    -----------    --------
<S>                    <C>            <C>           <C>         <C>            <C>
$4.00 to $10.00         531,913        6.5 years     $  8.47     338,953       $  8.49
$10.00 to $15.00        880,604        4.7 years     $ 13.78     420,393       $ 13.26
$15.00 and above         66,312        4.5 years     $ 19.76      16,437       $ 19.74
                      ---------                                  -------
                      1,478,829        5.3 years     $ 12.14     775,783       $ 11.32
                      =========                                  =======
</TABLE>
<TABLE>
<CAPTION>
                              1999                 1998                   1997
                        -------------------    -----------------    -------------------
                                   Weighted             Weighted               Weighted
                                   Average              Average                Average
                                   Exercise             Exercise               Exercise
                        Shares      Price      Shares     Price     Shares      Price
                        ------     --------    ------   --------    ------     --------
<S>                    <C>         <C>        <C>       <C>        <C>         <C>
Options outstanding,
 beginning of year     1,508,998    $10.51    1,864,265  $11.59    1,597,379    $12.22
Granted                  493,000     15.16      306,000   13.68      568,900      8.75
Exercised               (485,558)    10.18      (87,586)   9.28      (70,387)     4.24
Forfeited                (37,611)    11.56     (573,681)  15.89     (231,627)    11.18
                       ---------              ---------            ---------
  Options outstanding,
   end of year         1,478,829    $12.14    1,508,998  $10.51    1,864,265    $11.59
                       =========              =========            =========
Options exercisable,
 end of year             775,783    $11.32      983,362  $10.48    1,316,429    $12.53
                       =========              =========            =========
Weighted average fair
 value of options
 granted                  $6.98                   $6.47                $4.16

                              F-15
<PAGE>
At December 31, 1999, 2,850,000 shares of common stock were
reserved pursuant to stock option plans.

11. OTHER INCOME (EXPENSE):
    ----------------------

Other income (expense) is comprised of the following at December
31 (in thousands):

                                1999        1998         1997
                                ----        ----         ----
Investment income              $ 3,464     $ 3,130      $ 1,842
Other                              333        (860)      (1,195)
                               -------     -------      -------
                               $ 3,797     $ 2,270      $   647
                               =======     =======      =======

12. TAXES ON INCOME:
    ---------------

Income from continuing operations before taxes on income is as
follows for the years ended December 31 (in thousands):

                                1999        1998         1997
                                ----        ----         ----
Domestic                      $ 39,463    $ 25,803     $  9,432
Foreign                          5,972       6,056        7,495
                              --------    --------     --------
Total                         $ 45,435    $ 31,859     $ 16,927
                              ========    ========     ========

Provisions for taxes on income from continuing operations
consist of the following components for the years ended
December 31 (in thousands):

                                1999        1998         1997
                                ----        ----         ----
Current:
 Federal                      $ 12,670    $  6,730      $ 2,498
 Foreign                         2,491       3,848        3,519
 State                           2,029       1,327          280
                              --------    --------      -------
                                17,190      11,905        6,297
                              --------    --------      -------
Deferred:
 Federal                         1,682       1,031          900
 Foreign                          (180)        (76)        (302)
 State                             187         219          172
                              --------    --------      -------
                                 1,689       1,174          770
                              --------    --------      -------
Total taxes on income         $ 18,879    $ 13,079      $ 7,067
                              ========    ========      =======

A reconciliation between the U.S. federal statutory tax rate and
the effective tax rate follows:

                              F-16

<PAGE>
                                        1999     1998     1997
                                        ----     ----     ----

Income taxes at U.S. federal
 statutory tax rate                     35.0%    35.0%    34.0%
Increase in taxes resulting from:
 State income taxes, net of federal
  income tax benefit                     3.6      3.2      1.1
 Tax amortization of intangibles        (1.8)    (2.6)    (4.7)
 Goodwill amortization                   1.6      2.3      3.2
 Effect of foreign income taxed
  at foreign rates                        .2       .3      3.0
 Other                                   3.0      2.9      5.1
                                        ----     ----     ----
Total taxes on income                   41.6%    41.1%    41.7%
                                        ====     ====     ====

Net deferred taxes consist of the following at December 31 (in
thousands):

                                               1999      1998
                                              ------    ------
DEFERRED INCOME TAX ASSETS:
 Foreign tax credits and net operating
  loss carryforwards                          $ 2,986   $ 3,057
 Accrued losses and nondeductible
  reserves                                      1,776     2,160
 Accrued compensation                           1,264     1,799
 Other                                          1,852     2,137
                                              -------   -------
Total deferred income tax assets                7,878     9,153
                                              -------   -------
DEFERRED INCOME TAX LIABILITIES:
 Depreciation                                  (3,121)   (5,268)
 Patent defense cost                           (1,317)   (1,833)
 Other                                         (4,121)   (1,044)
                                              -------   -------
 Total deferred income tax liabilities         (8,559)   (8,145)
                                              -------   -------
 Net deferred income tax (liabilities) assets $  (681)  $ 1,008
                                              =======   =======

Subject to the future taxable income on certain of the Company's
subsidiaries, the Company's various foreign tax credits and tax
operating loss carryforwards have varying expiration dates, some
ranging from 2004-2010 while others have indefinite lives.

13. COMMITMENTS AND CONTINGENCIES:
    -----------------------------

Leases
- ------

The Company leases a number of its administrative operations
facilities under noncancellable operating leases expiring at
various dates through 2020.  In addition, the Company leases

                              F-17
<PAGE>
certain construction and automotive equipment on a multiyear
monthly or daily basis.  Rent expense under all operating leases
for 1999, 1998 and 1997 was $6,408,000, $6,135,000 and
$9,960,000, respectively.

At December 31, 1999, the future minimum lease payments required
under the noncancellable operating leases were as follows (in
thousands):

     Year Ending December 31          Minimum Lease Payments
     -----------------------          ----------------------
              2000                         $   5,127
              2001                             4,067
              2002                             3,151
              2003                             2,344
              2004                             1,356
              After 2004                         654
                                            --------
              Total                         $ 16,699
                                            ========
Litigation
- ----------

The Company is involved in certain litigation incidental to the
conduct of its business.  In the Company's opinion, none of
these proceedings will have a material adverse effect on the
Company's financial position, results of operations and
liquidity.  The financial statements include the estimated
amounts of liabilities that are likely to be incurred from these
and various other pending litigation and claims.

Retirement Plans
- ----------------

The Company maintains profit sharing/401(k) plans which cover
substantially all eligible domestic employees.  Company profit
sharing contributions are discretionary.  Under the terms of its
401(k) features, the plan also provides for the Company to
contribute 100% of the participating employee's contribution up
to 3% of the employee's salary, and 50% of the next 2% of the
employee's salary.  Total contributions to the domestic plans
were $3,457,000, $2,885,000 and $2,496,000 for the years ended
December 31, 1999, 1998 and 1997, respectively.

In addition, certain foreign subsidiaries maintain various other
defined contribution retirement plans.  Company contributions to
such plans for the years ended December 31, 1999, 1998 and 1997,
were $138,000, $103,000 and $132,000, respectively.

14. SEGMENT AND GEOGRAPHIC INFORMATION:
    ----------------------------------

The Company has principally three operating segments:
rehabilitation, tunnelling and corrosion and abrasion operations
(TiteLiner).  These operating units represent strategic business
units that offer distinct products and services and serve
different markets.
                              F-18
<PAGE>
The following disaggregated financial results have been prepared
using a management approach, which is consistent with the basis
and manner with which management internally disaggregates
financial information for the purpose of assisting in making
internal operating decisions.  The Company evaluates performance
based on standalone operating income.

There were no customers which accounted for more than 10% of the
Company's revenues during the three years ended December 31,
1999.

Financial information by segment is as follows at December 31
(in thousands):


</TABLE>
<TABLE>
<CAPTION>
                                          1999         1998        1997
                                         ------       ------      ------
<S>                                     <C>          <C>         <C>
Revenues:
 Rehabilitation                         $ 276,438    $ 225,192   $ 228,072
 Tunneling                                 40,049       32,336      30,215
 Tite Liner                                23,396       43,430      62,353
                                        ---------    ---------   ---------
        Total revenues                  $ 339,883    $ 300,958   $ 320,640
                                        =========    =========   =========
Operating (loss) income:
 Rehabilitation                         $  47,178    $  33,439   $  15,206
 Tunneling                                  4,965        3,068       1,993
 Tite Liner                                (1,474)       2,181       7,831
                                        ---------    ---------   ---------
        Total operating income          $  50,669    $  38,688   $  25,030
                                        =========    =========   =========
Total assets:
 Rehabilitation                         $ 197,670    $ 170,289   $ 155,118
 Tunneling                                 14,112       15,914      14,189
 Tite Liner                                15,185       25,566      34,419
 Corporate                                 84,658       92,839      94,126
                                        ---------    ---------   ---------
        Total assets                    $ 311,625    $ 304,608   $ 297,852
                                        =========    =========   =========
</TABLE>

Financial information by geographic area is as follows at
December 31 (in thousands):

<TABLE>
<CAPTION>
                                          1999         1998        1997
                                         ------       ------      ------
<S>                                     <C>          <C>         <C>
Revenues:
 United States                          $ 266,113    $ 220,090   $ 225,642
 Europe                                    42,398       32,986      31,216
 Canada                                    12,856       17,850      23,386
 South America                              9,693       19,033      27,205
 Asia                                       6,400        8,899       9,842
 Other                                      2,423        2,100       3,349
                                        ---------    ---------   ---------
      Total revenues                    $ 339,883    $ 300,958   $ 320,640
                                        =========    =========   =========
</TABLE>

                              F-19

<PAGE>
<TABLE>
<CAPTION>
                                          1999         1998        1997
                                         ------       ------      ------
<S>                                     <C>          <C>         <C>
Operating income (loss):
 United States                          $  46,446    $  30,155   $  17,227
 Europe                                     5,461        5,473       1,355
 Canada                                       316        1,294       3,724
 South America                             (3,651)         736       1,909
 Asia                                       1,472        1,395         401
 Other                                        625         (365)        414
                                        ---------    ---------   ---------
        Total operating income          $  50,669    $  38,688   $  25,030
                                        =========    =========   =========
Total assets:
 United States                          $ 219,619    $ 226,851   $ 228,102
 Europe                                    70,964       45,906      33,272
 Canada                                    13,472       16,868      20,179
 South America                              4,570       10,518      12,093
 Asia                                       2,665        4,048       3,541
 Other                                        335          417         665
                                        ---------    ---------   ---------
        Total assets                    $ 311,625    $ 304,608   $ 297,852
                                        =========    =========   =========
</TABLE>

15. SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED):
    ---------------------------------------------

(In thousands, except per share data)

<TABLE>
<CAPTION>
                                           1st      2nd       3rd      4th
                                        --------  -------   -------  -------
<S>                                     <C>       <C>      <C>      <C>
Year ended December 31, 1999:
 Revenues                               $71,162   $85,640   $93,251  $89,830
 Operating income                         8,928    12,833    15,634   13,274
 Net income                               4,250     6,393     7,986    7,354
 Basic and dilutive earnings per share      .16       .25       .31      .29

Year ended December 31, 1998:
 Revenues                               $63,760   $75,501   $81,047  $80,650
 Operating income                         7,017     9,254    11,784   10,633
 Net income                               3,046     4,409     5,566    4,866
 Basic and dilutive earnings per share      .11       .16       .21      .18
</TABLE>





                              F-20
<PAGE>
<PAGE>
                     INDEX TO EXHIBITS(1)(2)

3.1   -  Certificate of Incorporation of the
          Company (Incorporated by reference to
          Exhibit 3.1 to the Quarterly Report
          on Form 10-Q for the quarter ended
          June 30, 1999).

3.2   -  By-Laws of the Company (Incorporated by
          reference to Exhibit 3.2 to the Quarterly
          Report on Form 10-Q for the quarter
          ended June 30, 1999).

10.1  -  Note Purchase Agreements dated as of
          February 14, 1997 among the Company
          and, respectively, each of the lenders
          (the "Noteholders") listed therein
          (Incorporated by reference to Exhibit
          10.6 to the Annual Report on Form 10-K
          for the year ended December 31, 1996),
          together with First Amendment dated as
          of August 20, 1997, Guaranty Agreement
          dated as of August 20, 1997 by each of
          the subsidiaries named therein to the
          Noteholders, and Intercreditor Agreement
          dated as of August 20, 1997 among
          NationsBank, N.A. and the Noteholders
          (Incorporated by reference to Exhibit
          10(a) to the Quarterly Report on Form
          10-Q for the quarter ended September
          30, 1997) and Supplement No. 1 dated
          as of March 31, 1998 to Intercreditor
          Agreement among NationsBank, N.A. and
          the Noteholders, together with Guaranty
          Agreement dated as of March 31, 1998 by
          Insituform Southwest, Inc. to the
          Noteholders (Incorporated by reference
          to Exhibit 10.2 to the Annual Report on
          Form 10-K for the year ended December 31,
          1998).

- -----------------------------
(1)  The Company's current, quarterly and annual reports are
     filed with the Securities and Exchange Commission under
     file no. 0-10786.

(2)  Pursuant to Reg. Section 229.601, does not include certain
     instruments with respect to long-term debt of the Company
     and its consolidated subsidiaries not exceeding 10% of the
     total assets of the Company and its subsidiaries on a
     consolidated basis. The Company undertakes to furnish to
     the Securities and Exchange Commission, upon request, a
     copy of all long-term debt instruments not filed herewith.




                               E-1
<PAGE>
               INDEX TO EXHIBITS(1)(2) (Continued)

10.2  -  Loan Agreement dated as of August 20, 1997
          between NationsBank, N.A. and the Company,
          together with Unlimited Guaranty dated as
          of August 20, 1997 by each of the subsidiaries
          named therein to NationsBank, N.A. and
          Contribution Agreement dated August 20, 1997
          between NationsBank, N.A. and such guarantors
          (Incorporated by reference to Exhibit 10(b)
          to the Quarterly Report on Form 10-Q for the
          quarter ended September 30, 1997), Amendment
          No. 1 to Loan Agreement (Incorporated by
          reference to Exhibit 10.5 to the Annual
          Report on Form 10-K for the year ended
          December 31, 1997), and Amendment No. 2 to
          Loan Agreement dated as of September 15,
          1998 between NationsBank, N.A. and the
          Company, together with Joinder to Unlimited
          Guaranty and Contribution Agreement dated
          as of March 31, 1998 by Insituform Southwest,
          Inc. to NationsBank, N.A. (Incorporated by
          reference to Exhibit 10.4 to the Annual Report
          on Form 10-K for the year ended December 31,
          1998).

10.3  -  Agreement dated July 25, 1997 among Jerome
          Kalishman, Nancy F. Kalishman, Robert W.
          Affholder, Xanadu Investments L.P., The
          Jerome and Nancy Kalishman Family Fund,
          Paul A. Biddelman, Stephen P. Cortinovis,
          Anthony W. Hooper, Silas Spengler, Sheldon
          Weinig and Russell B. Wight, Jr. (Incorporated
          by reference to Exhibit 99.1 to the Current
          Report on Form 8-K dated July 25, 1997),
          together with Amendment No. 1 thereto (Incor-
          porated by reference to Exhibit 10(d) to the
          Quarterly Report on Form 10-Q for the quarter
          ended September 30, 1997).

- ----------------------------
(1)  The Company's current, quarterly and annual reports are
     filed with the Securities and Exchange Commission under
     file no. 0-10786.

(2)  Pursuant to Reg. Section 229.601, does not include certain
     instruments with respect to long-term debt of the Company
     and its consolidated subsidiaries not exceeding 10% of the
     total assets of the Company and its subsidiaries on a
     consolidated basis. The Company undertakes to furnish to
     the Securities and Exchange Commission, upon request, a
     copy of all long-term debt instruments not filed herewith.





                               E-2
<PAGE>
               INDEX TO EXHIBITS(1)(2) (Continued)

10.4  -  Employment Letter dated July 15, 1998
          between the Company and Anthony W.
          Hooper (Incorporated by reference to
          Exhibit 10.1 to the Quarterly Report on
          Form 10-Q for the quarter ended September
          30, 1998).(3)

10.5 -   Employment Agreement dated October 25,
          1995 between the Company and Robert
          W. Affholder (Incorporated by reference
          to Exhibit 2(d) to the Current Report
          on Form 8-K dated October 25, 1995), to-
          gether with Amendment No. 1 dated as of
          October 25, 1998 to Employment Agreement
          between the Company and Robert W. Affholder
          (Incorporated by reference to Exhibit 10.9
          to the Annual Report on Form 10-K for the
          year ended December 31, 1998).(3)

10.6 -   Letter agreement dated as of February 9,
          1999 between the Company and Thomas N.
          Kalishman (Incorporated by reference to
          Exhibit 10.10 to the Annual Report on
          Form 10-K for the year ended December 31,
          1998).(3)

10.7 -   Letter agreement dated as of October 9,
          1998 between the Company and William A.
          Martin, together with notice of even
          date therewith from Mr. Martin to the
          Company (Incorporated by reference to
          Exhibit 10.12 to the Annual Report on
          Form 10-K for the year ended December
          31, 1998), and Severance Agreement dated
          as of June 19, 1997 between the Company
          and William A. Martin (Incorporated by
          reference to Exhibit 10(b) to the Quarterly
          Report on Form 10-Q for the period ended
          June 30, 1997).
- ----------------------------------
(1)  The Company's current, quarterly and annual reports are
     filed with the Securities and Exchange Commission under
     file no. 0-10786.

(2)  Pursuant to Reg. Section 229.601, does not include certain
     instruments with respect to long-term debt of the Company
     and its consolidated subsidiaries not exceeding 10% of the
     total assets of the Company and its subsidiaries on a
     consolidated basis. The Company undertakes to furnish to
     the Securities and Exchange Commission, upon request, a
     copy of all long-term debt instruments not filed herewith.

(3)  Management contract or compensatory plan or arrangement.


                               E-3
<PAGE>
               INDEX TO EXHIBITS(1)(2) (Continued)

10.8 -   Severance Agreement dated as of March 14,
          1999 between the Company and Robert L.
          Kelley (Incorporated by reference to
          Exhibit 10.14 to the Annual Report on
          Form 10-K for the year ended December
          31, 1998)(3)

10.9 -   Employment letter dated February 10, 1997
          between the Company and Carroll Slusher.(3)

10.10 -  Equipment Lease dated as of October 10,
          1989 between A-Y-K-E Partnership and
          Affholder, Inc. (Incorporated by reference
          to Exhibit 10.20 to the Annual Report on
          Form 10-K for the year ended December 31,
          1995).(3)

10.11 -  1992 Employee Stock Option Plan of the
          Company.(3)

10.12 -  1992 Director Stock Option Plan of the
          Company.(3)

10.13 -  Insituform Mid-America, Inc. Stock Option
          Plan, as amended (Incorporated by reference
          to Exhibit 4(i) to the Registration
          Statement on Form S-8 No. 33-63953).(3)

10.14 -  Senior Management Voluntary Deferred
          Compensation Plan of the Company (In-
          corporated by reference to Exhibit 10.19
          to the Annual Report on Form 10-K for
          the year ended December 31, 1998).(3)

- ----------------------------------
(1)  The Company's current, quarterly and annual reports are
     filed with the Securities and Exchange Commission under
     file no. 0-10786.

(2)  Pursuant to Reg. Section 229.601, does not include certain
     instruments with respect to long-term debt of the Company
     and its consolidated subsidiaries not exceeding 10% of the
     total assets of the Company and its subsidiaries on a
     consolidated basis. The Company undertakes to furnish to
     the Securities and Exchange Commission, upon request, a
     copy of all long-term debt instruments not filed herewith.

(3)  Management contract or compensatory plan or arrangement.



                               E-4


<PAGE>
               INDEX TO EXHIBITS(1)(2) (Continued)

10.15 -  Form of Directors' Indemnification
          Agreement (Incorporated by reference
          to Exhibit 10.47 to the Annual Report
          on Form 10-K for the year ended
          December 31, 1988).(3)

21    -  Subsidiaries of the Company.

23    -  Consent of Arthur Andersen LLP.

24    -  Power of Attorney (See "Power of
          Attorney" in the Annual Report on
          Form 10-K).

27    -  Financial Data Schedule, which is
          submitted electronically to the
          Securities and Exchange Commission
          for information only and not filed.



















- ----------------------------------
(1)  The Company's current, quarterly and annual reports are
     filed with the Securities and Exchange Commission under
     file no. 0-10786.

(2)  Pursuant to Reg. Section 229.601, does not include certain
     instruments with respect to long-term debt of the Company
     and its consolidated subsidiaries not exceeding 10% of the
     total assets of the Company and its subsidiaries on a
     consolidated basis. The Company undertakes to furnish to
     the Securities and Exchange Commission, upon request, a
     copy of all long-term debt instruments not filed herewith.

(3)  Management contract or compensatory plan or arrangement.


                               E-5

                                                     EXHIBIT 10.9

                  Insituform Technologies, Inc.
                        17988 Edison Ave.
                     Chesterfiled, MO  63005
                      Tel:  (314) 532-6137
                      Fax:  (314) 530-0751


February 10, 1997

Mr. Carroll Slusher
3960 Brookline Drive
Alpharette, GA  30202

Dear Carroll:

This will confirm our offer of employment extended to you for the
position of Director-West Regions for Insituform Technologies, Inc.
This position will report to the Senior Vice President, Insituform
Technologies, Inc., responsible for North American rehabilitation.

In accepting this position, you will be provided a starting salary
of $160,000 annualized.  This converts to $6,153.85 on a semi-
monthly basis which is the regular pay cycle for executive
employees.  You will be eligible to participate in an incentive
compensation plan with a target bonus opportunity of up to 50% of
your base salary to a maximum of 75% of your base.  For calendar
year 1997, any incentive earned will be prorated from your date of
hire.  The plan and the performance measurement criteria are
detailed in the enclosed document.

Upon joining the Insituform Technologies, Inc. team as a full-time
regular employee, you will be provided with company benefits as
outlined in the enclosed benefits information package.  Benefit
eligibility and coverages are detailed in this information.  It
should be noted that these benefits are subject to change with or
without notice and operate at the sole discretion of the Company.

You will be entitled to three weeks of paid vacation to be taken
during the 1997 calendar year.  Thereafter, your vacation will be
determined in accordance with the ITI vacation policy.

This position is based in St. Louis, Missouri, therefore, you will
be required to relocate.  ITI will extend relocation assistance to
you, including reimbursement of certain usual and customary closing
costs on both the sale of your current residence and the purchase
of a new residence; packing, transportation, unpacking and up to
three months temporary storage of your household goods; two house-
hunting trips for you and your spouse and temporary living
accommodations for up to three months at the new location if
required.  Additionally, you will be provided a relocation
allowance equal to four weeks of base salary.


<PAGE>

Mr. Carroll Slusher
February 10, 1997
Page 2

This offer of employment is contingent upon the successful
completion of a drug screen for controlled substances, which will
be paid for by Insituform.  Please contact Cindy Shaw at (800) 325-
1159 to make the arrangements.

In the event you are terminated by the Company for any reason other
than "cause" within the first twenty-four (24) months of your
employment, you will be entitled to severance equal to twelve (12)
months base salary and paid over that period.  "Cause" shall be
defined as substantial dereliction of duty after written notice
thereof, conviction of a felony, or the inability to report for
work for a period of four months or greater.

I know this will be a challenging and exciting opportunity for you
and we look forward to having you on the Insituform term.  Kindly
indicate your acceptance by signing this letter and the
Confidentiality, Non-Disclosure and Non-Compete, and Conflict of
Interest agreements.  Retain one copy for your files and return the
other to me in the enclosed envelope.  Once this offer has been
accepted, we will establish a mutually agreed upon start date.

Carroll, we look forward to you and your family joining us in St.
Louis.  Please contact me if you have any questions.



Sincerely,


/s/ Dale T. Harden


Enclosures

cc:  Jack Boatman
     Cindy Shaw


I accept the Director-West Regions position as outlined herein and
on the attached addendum dated February 20, 1997.


/s/ Carroll Slusher                         2/24/97
- -------------------------               -------------------------
Carroll Slusher

<PAGE>







February 20, 1997


Mr. Dale Harden
Senior Vice President
Insituform Technologies, Inc.
17988 Edison Ave.
Chesterfield, MO  63005

Dear Dale:

As an addendum to your letter dated February 10, we have discussed
and agreed on a few additional items that I would like to document
here.

I will be entitled to three weeks paid vacation in 1997 and each
subsequent year.  The position will include a company car allowance
of $700 per month and payment per mile for business related mileage
at the appropriate company established rate.

The annual incentive compensation performance measurement criteria
will be forthcoming in March with the target bonus opportunities as
you defined.

I recognize that there is no home sale assistance or potential
recovery in our agreement but I would ask for appropriate
consideration should the sale of my home cause undue financial or
personal hardship.

I am looking forward to the challenge and opportunity as the new
Director-Western Regions for Insituform Technologies, Incorporated.
I fill it offers me the potential to show the value of my
experience and training in a progressive and exciting Company.  I
hope to see you soon.


Sincerely,



/s/ Carroll W. Slusher


                                                    EXHIBIT 10.11
                  INSITUFORM TECHNOLOGIES, INC.

                 1992 EMPLOYEE STOCK OPTION PLAN

                 (as amended February 17, 2000)


          1.   Purposes of Plan.  The purposes of this Plan, which
shall be known as the Insituform Technologies, Inc. 1992 Employee
Stock Option Plan, and is hereinafter referred to as the "Plan",
are (i) to provide incentives for key employees of Insituform
Technologies, Inc. (the "Company") and any parent and subsidiary
corporations (within the respective meanings of Sections 424(e) and
424(f) of the Internal Revenue Code of 1986, as amended (the
"Code"), and referred to herein as "Parent" and "Subsidiary,"
respectively), and to consultants and other individuals providing
services to such companies, by encouraging their ownership of the
class A common stock, $.01 par value (the "Common Stock"), of the
Company, and (ii) to aid the Company in retaining such key
employees and other persons, upon whose efforts the Company's
success and future growth depends, and attracting other such
employees and other persons.

          2.   Administration.  The Plan shall be administered by
the Board of Directors of the Company or, as determined by the
Board of Directors in its sole discretion, by a committee from time
to time appointed by the Board of Directors and consisting of not
less than two of its members (the Board of Directors, or such
committee, for purposes of this Plan hereinafter referred to as the
"Committee"), as hereinafter provided. Subject to the terms of the
Plan, the Committee shall have plenary authority to determine the
key employees, consultants and other individuals to whom options
are to be granted under the Plan, the number of shares to be
subject to each such option, the terms and conditions upon which
the options are granted and are exercisable and whether such
options will be incentive stock options or non-qualified stock
options. For purposes of administration, the Committee, subject to
the terms of the Plan, shall have plenary authority to establish
such rules and regulations, make such determinations and
interpretations and take such other administrative actions as it
deems necessary or advisable.  All determinations and
interpretations made by the Committee shall be final, conclusive
and binding on all persons, including Optionees (as hereinafter
defined) and their legal representatives and beneficiaries.

          The Board of Directors shall designate one of the members
of the Committee as its Chairman.  The Committee shall hold its
meetings at such times and at such places as it may determine.  A
majority of its members shall constitute a quorum.  All
determinations of the Committee shall be made by a majority of its
members.  Any decision or determination reduced to writing and
signed by all members shall be as effective as if it had been made
by a majority vote at a meeting duly called and held.  The
Committee may appoint a secretary (who need not be a member of the 
<PAGE>
<PAGE>
Committee).  No member of the Committee shall be liable for any act
or omission with respect to his service on the Committee if he acts
in good faith and in a manner he reasonably believes to be in or
not opposed to the best interests of the Company.  Service on the
Committee shall constitute service as a director of the Company for
all purposes.

          The Committee may, in its sole discretion, authorize the
Non-Insider Stock Option Committee (the "Non-Insider Committee") of
the Board of Directors to determine the key employees, consultants
and other individuals to whom options otherwise authorized by the
Committee are to be granted, in each case subject to the terms of
the Plan and such authorization by the Committee and insofar as
such optionees do not constitute "officers", for purposes of
Section 16 of the Securities and Exchange Act of 1934; and, in the
event the Non-Insider Committee does not determine such
individuals, shares of Common Stock otherwise covered by options
authorized by the Committee and submitted to the Non-Insider Stock
Option Committee shall be available for further options hereunder.

          The Non-Insider Committee shall be appointed from time to
time by the Board of Directors and shall consist of one or more of
its members, who need not be members of the Committee.  The Non-
Insider Committee shall hold its meetings at such times and at such
places as it may determine.  A majority of its members shall
constitute a quorum.  All determinations made by the Non-Insider
Committee shall be made by a majority of its members.  Any decision
or determination reduced to writing and signed by all members shall
be effective as if it had been made by a majority vote at a meeting
duly called and held.  The Non-Insider Committee may appoint a
Secretary (who need not be a member of the Committee). No member of
the Non-Insider Committee shall be liable for any act or omission
with respect to his service on the Committee if he acts in good
faith and in a manner he reasonably believes to be in or not
opposed to the best interests of the Company.  Service on the Non-
Insider Committee shall constitute service as a director of the
Company for all purposes.

          3.   Stock Available for Options.  There shall be
available for options under the Plan a total of 2,850,000 shares of
Common Stock, subject to any adjustments which may be made
pursuant to Section 5(f) hereof.* Shares of Common Stock used for
purposes of the Plan may be either authorized and unissued shares,
or previously issued shares held in the treasury of the Company, or
both.  Shares of Common Stock covered by options which have
terminated or expired prior to exercise shall be available for
further options hereunder.

- --------------------------
*  subject to shareholder approval

<PAGE>
<PAGE>
          4.   Eligibility.  Options under the Plan may be granted
to key employees of the Company or any Parent or Subsidiary
thereof, including officers of the Company or any Parent or
Subsidiary thereof, and to consultants and other individuals
providing services to the Company or any Parent or Subsidiary.
Options may not be granted under the Plan to any member of the
Board of Directors of the Company (whether or not a key employee
of, or a consultant or other individual providing services to, the
Company or any Parent or Subsidiary).  Options may be granted to
eligible individuals whether or not they hold or have held options
previously granted under the Plan or otherwise granted or assumed
by the Company.  In selecting individuals for options, the
Committee (with reference to any action of the Non-Insider
Committee, if and to the extent authorized pursuant to Section 2)
may take into consideration any factors it may deem relevant,
including its estimate of the individual's present and potential
contributions to the success of the Company and/or any Parent or
Subsidiary thereof.  Service as a consultant of or to the Company
or any Parent or Subsidiary shall be considered employment for
purposes of the Plan (and the period of such service shall be
considered the period of employment for purposes of Section 5(d) of
the Plan); provided, however, that incentive stock options may be
granted under the Plan only to an individual who is an "employee"
(as such term is used in Section 422 of the Code) of the Company or
any Subsidiary or Parent.

          5.   Terms and Conditions of Options.  The Committee
(with reference to any action of the Non-Insider Committee, if and
to the extent authorized pursuant to Section 2) shall, in its
discretion, prescribe the terms and conditions of the options to be
granted hereunder which terms and conditions  need not be the same
in each case, subject to the following:

               (a)    Option Price.  The price at which each share
of Common Stock covered by an option granted under the Plan may be
purchased shall be determined by the Committee (with reference to
any action of the Non-Insider Committee, if and to the extent
authorized pursuant to Section 2) and shall not be less than the
lesser of (i) the tangible book value per share of Common Stock,
determined in accordance with generally accepted accounting
principles, as of the end of the fiscal quarter of the Company
immediately preceding the fiscal quarter in which the option is
granted, or (ii) the market value per share of Common Stock on the
date of grant of an option as determined pursuant to Section 5(c).
The date of the grant of an option shall be the date specified by
the Committee (with reference to any action of the Non-Insider
Committee, if and to the extent authorized pursuant to Section 2)
in its grant of the option.

               (b)    Option Period.  The period for exercise of an
option shall in no event be more than ten years from the date of
grant. Options may, in the discretion of the Committee, be made 
<PAGE>
<PAGE>
exercisable in installments during the option period.  Any shares
not purchased on any applicable installment date may be purchased
thereafter at any time before the expiration of the option period.

               (c)    Exercise of Options.  In order to exercise an
option, the holder thereof (the "Optionee") shall deliver to the
Company written notice specifying the number of shares of Common
Stock to be purchased, together with cash or a certified or bank
cashier's check payable to the order of the Company in the full
amount of the purchase price therefor; provided that, for the
purpose of assisting an Optionee to exercise an option, the Company
may make loans to the Optionee or guarantee loans made by third
parties to the Optionee, on such terms and conditions as the Board
of Directors may authorize and approve; and provided further that
such purchase price may be paid in shares of Common Stock owned by
the Optionee having a market value on the date of exercise equal to
the aggregate purchase price, or in a combination of cash and
Common Stock.  For purposes of the Plan, the market value per share
of Common Stock shall be the last sale price regular way on the
date of reference, or, in case no sale takes place on such day, the
average of the closing bid and asked prices regular way, in either
case on the principal national securities exchange on which the
Common Stock is listed or admitted to trading, or if the Common
Stock is not listed or admitted to trading on any national
securities exchange, the last sale price of the Common Stock as
reported on the National Association of Securities Dealers
Automated Quotation ("NASDAQ") National Market System on such date,
or if the Common Stock is not so reported, the average of the
closing high bid and low asked prices of the Common Stock in the
over-the-counter market on such date, as reported on the NASDAQ
system, or if there are no such prices reported on the NASDAQ
system on such date, as furnished to the Committee by a New York
Stock Exchange member selected from time to time by the Committee
for such purpose.  If there is no bid or asked price reported on
any such date, the market value shall be determined by the
Committee in accordance with the regulations promulgated under
Section 2031 of the Code, or by any other appropriate method
selected by the Committee.  An Optionee shall have none of the
rights of a stockholder until the shares of Common Stock are issued
to him.  An option may not be exercised for less than ten shares of
Common Stock, or the number of shares of Common Stock remaining
subject to such option, whichever is smaller.

               (d)    Effect of Termination of Employment.  An
option may not be exercised after the Optionee has ceased to be in
the employ of the Company or any Parent or Subsidiary, except in
the following circumstances:


<PAGE>
<PAGE>
               (i)   if the Optionee's employment is
          terminated at or after age 60 (unless the
          employer shall have grounds to terminate the
          Optionee's employment for "cause" [as
          hereinafter defined]) or by action of the
          Optionee's employer for reasons other than
          cause, the option may be exercised by the
          Optionee within 30 days after such
          termination, but only as to any shares
          exercisable on the date the  Optionee's
          employment so terminates;

               (ii)   if the Optionee's employment is
          terminated by reason of the Optionee's total
          and permanent disability (pursuant to the
          terms of any employee disability benefit plan
          maintained by the Company or any Parent or
          Subsidiary thereof) while employed by the
          Company or any Parent or Subsidiary thereof
          (unless the employer shall have grounds to
          terminate the Optionee's employment for
          cause), the option shall thereupon become
          exercisable in full by the Optionee within 30
          days after such termination;

               (iii)  in the event of the death of the
          Optionee during the 30-day period after
          termination of employment covered by (i)
          above, the Optionee's beneficiary or the
          person or persons to whom his rights are
          transferred by will or the laws of descent and
          distribution shall have a period of one year
          from the date of his death to exercise any
          options which were exercisable by the Optionee
          at the time of his death;

               (iv) in the event of the death of the
          Optionee while employed, the option shall
          thereupon become exercisable in full, and the
          person or persons to whom the Optionee's
          rights are transferred by will or the laws of
          descent and distribution shall have a period
          of one year from the date of the Optionee's
          death to exercise such option.

The provisions of the foregoing clauses (ii) and  (iii) shall apply
to any outstanding options which are incentive stock options to the
extent permitted by Section 422(d) of the Code and such outstanding
options in excess thereof shall, immediately upon the occurrence of
the event described in the foregoing clauses (ii) and (iii), be
treated for all purposes of the Plan as nonstatutory stock options
and shall be immediately exercisable as such as provided in the
foregoing clauses (ii) and (iii).
<PAGE>
<PAGE>
     For purposes of this Plan, the term "cause" shall be defined
to mean the Optionee's: (i) breach of any undertaking by the
Optionee  not to compete with the Company or any Parent or
Subsidiary thereof; (ii) breach of any undertaking by the Optionee
to keep and maintain confidential information of the Company or any
Parent or Subsidiary thereof in strictest confidence, or (iii)
causing or inducing, or attempting to cause or induce, either
directly or indirectly, any employees, sales representatives,
consultants or other personnel of the Company or any Parent or
Subsidiary thereof to terminate their relationships or employment
or breach their agreements with the Company or any Parent or
Subsidiary thereof, or requesting or advising any of the customers,
suppliers, or other business contacts of the Company or any Parent
or Subsidiary thereof to withdraw, curtail or cancel their business
with the Company or any Parent or Subsidiary thereof.

          In no event shall any option be exercisable more than ten
years from the date of grant thereof.  Nothing in the Plan or in
any option granted pursuant to the Plan (in the absence of an
express provision to the contrary) shall confer on any individual
any right to continue in the employ of the Company or any Parent or
Subsidiary thereof or interfere in any way with the right of the
Company to terminate his employment at any time.

               (e)    Nontransferability of Options.  During the
lifetime of an Optionee, options held by such Optionee shall be
exercisable only by him.  No option shall be transferable other
than by will or by the laws of descent and distribution; provided,
however, that Options may, in the discretion of the Committee,
permit the Optionee to designate a beneficiary or beneficiaries, in
the event of the Optionee's death, to exercise the rights of the
Optionee and receive the Stock issued pursuant to the Option. Such
beneficiary designation shall be in such form as shall be
prescribed by the Committee, shall be effective upon delivery to
the Company, and when effective shall revoke all prior
designations.  If an Optionee dies with no such beneficiary
designation in effect, the Option shall be transferred by will or
pursuant to the laws of descent and distribution.

               (f)    Adjustments for Change in Stock Subject to
Plan and Other Events.  In the event of a reorganization,
recapitalization, stock split, stock dividend, combination of
shares, merger, consolidation, rights offering, or any other change
in the corporate structure or shares of the Company, the Committee
shall make such adjustments, if any, as it deems appropriate in the
number and kind of shares subject to the Plan, in the number and
kind of shares covered by outstanding options, or in the option
price per share.

               (g)    Registration, Listing and Qualification of
Shares of Stock.  Each option shall be subject to the requirement
that if at any time the Board of Directors shall determine that the
registration, listing or qualification of the shares of Common
<PAGE>
<PAGE>
Stock covered thereby upon any securities exchange or under any
federal or state law, or the consent or approval of any
governmental regulatory body is necessary or desirable as a
condition of, or in connection with, the granting of such option or
the purchase of shares of Common Stock thereunder, no such option
may be exercised unless and until such registration, listing,
qualification, consent or approval shall have been effected or
obtained free of any conditions not acceptable to the Board of
Directors.  The Company may require that any person exercising an
option shall make such representations and agreements and furnish
such information as it deems appropriate to assure compliance with
the foregoing or any other applicable legal requirement.

               (h)    Other Terms and Conditions.  The Committee
may impose such other terms and conditions, not inconsistent with
the terms hereof, on the grant or exercise of options, as it deems
advisable.

          6.   Provisions Applicable to Incentive Stock Options.
The Committee (with reference to any action of the Non-Insider
Committee, if and to the extent authorized pursuant to Section 2)
may, in its discretion, grant "incentive stock options" (within the
meaning of Section 422 of the Code) under the Plan to eligible
employees, provided, however, that: (a) no such incentive stock
option shall be granted at an option price which is less than the
market value per share of Common Stock on the date of the grant;
(b) no such incentive stock option shall be issued to any one
Optionee if the aggregate fair market value, determined at the time
of the grant of such incentive stock options, of the shares with
respect to which such incentive stock options are exercisable for
the first time by such Optionee during any calendar year, together
with all options under any other incentive stock option plan of the
Company exercisable during such year, exceeds $100,000; (c) no such
incentive stock option shall be granted to any Optionee who at the
time such option is granted owns more than 10 percent of the total
combined voting stock of the Company unless (i) the option price is
not less than 110 percent of the fair market value per share of
stock on the date of the grant, and (ii) the option is not
exercisable after five years from the date such option is granted;
and (d) Section 5(d)(iii) hereof shall not apply to any incentive
stock option.

          7.   Withholding Tax.  Upon the disposition by any person
of shares of Common Stock acquired pursuant to the exercise of an
option granted pursuant to the Plan, the Company shall have the
right to require such person to pay the Company the amount of any
taxes which the Company may be required to withhold with respect to
such shares.

          8.   Amendment and Termination.  Unless the Plan shall
theretofore have been terminated as hereinafter provided, the Plan
shall terminate on, and no option shall be granted thereunder after
March 31, 2002; provided, however, that the Board of Directors may
<PAGE>
<PAGE>
at any time prior to that date terminate the Plan. The Board of
Directors may at any time amend the Plan; provided, however, that,
except as contemplated in Section 5(f) hereof, the Board of
Directors shall not, without approval by a majority of the votes
cast by the stockholders of the Company at a meeting of stock-
holders at which a proposal to amend the Plan is voted upon: (i)
increase the maximum number of shares of Common Stock for which
options may be granted under the Plan, (ii) change the formula as
to minimum option prices, (iii) extend the period during which
options may be granted or exercised, or (iv) amend the requirements
as to the class of persons eligible to receive options. No
termination or amendment of the Plan may, without the consent of an
Optionee, adversely affect the rights of such Optionee under any
option held by such Optionee.

          9.   Effectiveness of Plan.  The Plan will not be made
effective unless approved by a majority of the votes cast by the
stockholders of the Company at a meeting of stockholders within
twelve (12) months from the date the Plan is adopted by the Board
of Directors, duly called and held for such purpose, and no option
granted hereunder shall be exercisable prior to such approval.

          10.  Other Actions.  Nothing contained in the Plan shall
be construed to limit the authority of the Company to exercise its
corporate rights and powers, including but not by way of
limitation, the right of the Company to grant or assume options for
proper corporate purposes other than under the Plan with respect to
any employee or other person, firm, corporation or association.

                                                    EXHIBIT 10.12

                  INSITUFORM TECHNOLOGIES, INC.

                 1992 DIRECTOR STOCK OPTION PLAN

                 (as amended February 17, 2000)

          1.   Purposes of Plan.  The purposes of this Plan, which
shall be known as the Insituform Technologies, Inc. 1992 Director
Stock Option Plan, and is hereinafter referred to as the "Plan",
are (i) to provide incentives for members of the Board of Directors
of Insituform Technologies, Inc. (the "Company") by encouraging
their ownership of the class A common stock, $.01 par value (the
"Common Stock"), of the Company, and (ii) to aid the Company in
retaining such directors, upon whose efforts the Company's success
and future growth depends, and attracting other such directors.

          2.   Administration.  The Plan shall be administered by
the Board of Directors of the Company or, as determined by the
Board of Directors in its sole discretion, by a committee from time
to time appointed by the Board of Directors and consisting of not
less than two of its members (the Board of Directors, or such
committee, for purposes of this Plan hereinafter referred to as the
"Committee"), as hereinafter provided. Subject to the terms of the
Plan, the Committee shall have plenary authority to determine the
directors to whom options are to be granted, the number of shares
to be subject to each such option, the terms and conditions upon
which the options are granted and are exercisable, and whether such
options will be incentive stock options or non-qualified stock
options. For purposes of administration, the Committee, subject to
the terms of the Plan, shall have plenary authority to establish
such rules and regulations, make such determinations and
interpretations, and take such other administrative actions as it
deems necessary or advisable.  All determinations and
interpretations made by the Committee shall be final, conclusive
and binding on all persons, including Optionees (as hereinafter
defined) and their legal representatives and beneficiaries.

          The Board of Directors shall designate one of the members
of the Committee as its Chairman.  The Committee shall hold its
meetings at such times and at such places as it may determine.  A
majority of its members shall constitute a quorum.  All
determinations of the Committee shall be made by a majority of its
members.  Any decision or determination reduced to writing and
signed by all members shall be as effective as if it had been made
by a majority vote at a meeting duly called and held.  The
Committee may appoint a secretary (who need not be a member of the
Committee).  No member of the Committee shall be liable for any act
or omission with respect to his service on the Committee if he acts
in good faith and in a manner he reasonably believes to be in or
not opposed to the best interests of the Company.  Service on the
Committee shall constitute service as a director of the Company for
all purposes.
<PAGE>
<PAGE>
          3.   Stock Available for Options.  There shall be
available for options under the Plan a total of 1,500,000 shares
of Common Stock, subject to any adjustments which may be made
pursuant to Section 5(f) hereof.*  Shares of Common Stock used for
purposes of the Plan may be either authorized and unissued shares,
or previously issued shares held in the treasury of the Company, or
both.  Shares of Common Stock covered by options which have
terminated or expired prior to exercise shall be available for
further options hereunder.

          4.   Eligibility.  Options under the Plan may be granted
to directors of the Company (including officers, key employees and
consultants of the Company).  Options may be granted to such
directors whether or not they hold or have held options previously
granted under the Plan or otherwise granted or assumed by the
Company.  In selecting directors for options, the Committee may
take into consideration any factors it may deem relevant, including
its estimate of the director's present and potential contributions
to the success of the Company.

          5.   Terms and Conditions of Options.  The Committee
shall, in its discretion, prescribe the terms and conditions of
the options to be granted hereunder which terms and conditions
need not be the same in each case, subject to the following:

               (a)    Option Price.  The price at which each share
of Common Stock covered by an option granted under the Plan may be
purchased shall be determined by the Committee and shall not be
less than the lesser of (i) the tangible book value per share of
Common Stock, determined in accordance with generally accepted
accounting principles, as of the end of the fiscal quarter of the
Company immediately preceding the fiscal quarter in which the
option is granted, or (ii) the market value per share of Common
Stock on the date of grant of an option as determined pursuant to
Section 5(c).  The date of the grant of an option shall be the date
specified by the Committee in its grant of the option.

               (b)    Option Period.  The period for exercise of an
option shall in no event be more than ten years from the date of
grant. Options may, in the discretion of the Committee, be made
exercisable in installments during the option period.  Any shares
not purchased on any applicable installment date may be purchased
thereafter at any time before the expiration of the option period.

               (c)    Exercise of Options.  In order to exercise an
option, the holder thereof (the "Optionee") shall deliver to the

- -----------------------------
*    subject to shareholder approval


<PAGE>
<PAGE>
Company written notice specifying the number of shares of Common
Stock to be purchased, together with cash or a certified or bank
cashier's check payable to the order of the Company in the full
amount of the purchase price therefor; provided that, for the
purpose of assisting an Optionee to exercise an option, the Company
may make loans to the Optionee or guarantee loans made by third
parties to the Optionee, on such terms and conditions as the Board
of Directors may authorize; and provided further that such purchase
price may be paid in shares of Common Stock owned by the Optionee
having a market value on the date of exercise equal to the
aggregate purchase price, or in a combination of cash and Common
Stock.  For purposes of the Plan, the market value per share of
Common Stock shall be the last sale price regular way on the date
of reference, or, in case no sale takes place on such day, the
average of the closing bid and asked prices regular way, in either
case on the principal national securities exchange on which the
Common Stock is listed or admitted to trading, or if the Common
Stock is not listed or admitted to trading on any national
securities exchange, the last sale price of the Common Stock as
reported on the National Association of Securities Dealers
Automated Quotation ("NASDAQ") National Market System on such date,
or if the Common Stock is not so reported, the average of the
closing high bid and low asked prices of the Common Stock in the
over-the-counter market on such date, as reported on the NASDAQ
system, or if there are no such prices reported on the NASDAQ
system on such date, as furnished to the Committee by a New York
Stock Exchange member selected from time to time by the Committee
for such purpose.  If there is no bid or asked price reported on
any such date, the market value shall be determined by the
Committee in accordance with the regulations promulgated under
Section 2031 of the Code, or by any other appropriate method
selected by the Committee. An Optionee shall have none of the
rights of a stockholder until the shares of Common Stock are issued
to him.  An option may not be exercised for less than 1,000 shares
of Common Stock, or the number of shares of Common Stock remaining
subject to such option, whichever is smaller.

               (d)    Effect of Termination of Service.  An option
may not be exercised after the Optionee has ceased to be in the
service of the Company or any parent or subsidiary corporations
(within the respective meanings of Sections 424(e) and 424(f) of
the Internal Revenue Code of 1986, as amended [the "Code"], and
referred to herein as "Parent" or "Subsidiary", respectively),
whether as a director of the Company or an employee or consultant
of the Company or any Parent or Subsidiary thereof, except in the
following circumstances:

               (i)   if (x) the Optionee's service as a
          director is terminated for any reason, and (y)
          the Optionee is not an employee or consultant
          of the Company or any Parent or Subsidiary
          thereof, or his employ is terminated at or
          after age 60 or by action of the Company, the
<PAGE>
<PAGE>
          option may be exercised by the Optionee within
          30 days after the last such termination, but
          only as to any shares exercisable on the date
          the Optionee's service and/or employment so
          terminates;

               (ii)   if the Optionee's service and/or
          employment is terminated by reason of the
          Optionee's total and permanent disability
          (pursuant to the terms of any employee
          disability benefit plan maintained by the
          Company or any Parent or Subsidiary thereof)
          while employed by the Company or any Parent or
          Subsidiary thereof, the option shall thereupon
          become exercisable in full by the Optionee
          within 30 days after such termination;

               (iii)  in the event of the death of the
          Optionee during the 30-day period after
          termination of service and/or employment
          covered by (i) above, the Optionee's
          beneficiary or the person or persons to whom
          his rights are transferred by will or the laws
          of descent and distribution shall have a
          period of one year from the date of his death
          to exercise any options which were exercisable
          by the Optionee at the time of his death;

               (iv) in the event of the death of the
          Optionee while serving as a director or
          employed, the option shall thereupon become
          exercisable in full, and the person or persons
          to whom the Optionee's rights are transferred
          by will or the laws of descent and
          distribution shall have a period of one year
          from the date of the Optionee's death to
          exercise such option.


The provisions of the foregoing clauses (ii) and (iii) shall apply
to any outstanding options which are incentive stock options to the
extent permitted by Section 422(d) of the Code and such outstanding
options in excess thereof shall, immediately upon the occurrence of
the event described in the foregoing clauses (ii) and (iii), be
treated for all purposes of the Plan as nonstatutory stock options
and shall be immediately exercisable as such as provided in the
foregoing clauses (ii) and (iii).

          For purposes of this Section 5(d), service as a
consultant of or to the Company or any Parent or Subsidiary shall
be considered employment, and the period of such service shall be
considered the period of employment; provided, however, that
incentive stock options may be granted under the Plan only to a
<PAGE>
<PAGE>
director who is an "employee" (as such term is used in Section 422
of the Code) of the Company or any Subsidiary or Parent.

          In no event shall any option be exercisable more than ten
years from the date of grant thereof.  Nothing in the Plan or in
any option granted pursuant to the Plan (in the absence of an
express provision to the contrary) shall confer on any individual
any right to continue in the service of the Company or any Parent
or Subsidiary thereof or interfere in any way with the right of the
Company to terminate his service.

               (e)    Nontransferability of Options.  During the
lifetime of an Optionee, options held by such Optionee shall be
exercisable only by him.  No option shall be transferable other
than by will or by the laws of descent and distribution; provided,
however, that Options may, in the discretion of the Committee,
permit the Optionee to designate a beneficiary or beneficiaries, in
the event of the Optionee's death, to exercise the rights of the
Optionee and receive the Stock issued pursuant to the Option. Such
beneficiary designation shall be in such form as shall be
prescribed by the Committee, shall be effective upon delivery to
the Company, and when effective shall revoke all prior
designations.  If an Optionee dies with no such beneficiary
designation in effect, the Option shall be transferred by will or
pursuant to the laws of descent and distribution.

               (f)    Adjustments for Change in Stock Subject to
Plan and Other Events.  In the event of a reorganization,
recapitalization, stock split, stock dividend, combination of
shares, merger, consolidation, rights offering, or any other change
in the corporate structure or shares of the Company, the Committee
shall make such adjustments, if any, as it deems appropriate in the
number and kind of shares subject to the Plan, in the number and
kind of shares covered by outstanding options, or in the option
price per share.

               (g)    Registration, Listing and Qualification
Shares of Stock.  Each option shall be subject to the requirement
that if at any time the Board of Directors shall determine that the
registration, listing or qualification of the shares of Common
Stock covered thereby upon any securities exchange or under any
federal or state law, or the consent or approval of any
governmental regulatory body is necessary or desirable as a
condition of, or in connection with, the granting of such option or
the purchase of shares of Common Stock thereunder, no such option
may be exercised unless and until such registration, listing,
qualification, consent or approval shall have been effected or
obtained free of any conditions not acceptable to the Board of
Directors.  The Company may require that any person exercising an
option shall make such representations and agreements and furnish
such information as it deems appropriate to assure compliance with
the foregoing or any other applicable legal requirement.

<PAGE>
<PAGE>
               (h)    Other Terms and Conditions.  The Committee
may impose such other terms and conditions, not inconsistent with
the terms hereof, on the grant or exercise of options, as it deems
advisable.

          6.   Provisions Applicable to Incentive Stock Options.
The Committee may, in its discretion, grant "incentive stock
options" (within the meaning of Section 422 of the Code), under the
Plan to directors provided, however, that: (a) no such incentive
stock option shall be issued to a director of the Company who is
not also an employee or officer of the Company; (b) no such
incentive stock option shall be granted at an option price which is
less than the market value per share of Common Stock on the date of
the grant; (c) no such incentive stock option shall be issued to
any one Optionee if the aggregate fair market value, determined at
the time of the grant of such incentive stock options, of the
shares with respect to which such incentive stock options are
exercisable for the first time by such Optionee during any calendar
year, together with all options under any other incentive stock
option plan of the Company exercisable during such year, exceeds
$100,000; (d) no such incentive stock option shall be granted to
any Optionee who at the time such option is granted owns more than
10 percent of the total combined  voting stock of the Company
unless (i) the option price is not less than 110 percent of the
fair market value per share of stock on the date of the grant, and
(ii) the option is not exercisable after five years from the date
such option is granted; and (e) Section 5(d)(ii) hereof shall not
apply to any incentive stock option.

          7.   Withholding Tax.  Upon the disposition by any person
of shares of Common Stock acquired pursuant to the exercise of an
option granted pursuant to the Plan, the Company shall have the
right to require such person to pay the Company the amount of any
taxes which the Company may be required to withhold with respect to
such shares.

          8.   Amendment and Termination.  Unless the Plan shall
theretofore have been terminated as hereinafter provided, the Plan
shall terminate on, and no option shall be granted thereunder after
March 31, 2002; provided, however, that the Board of Directors may
at any time prior to that date terminate the Plan. The Board of
Directors may at any time amend the Plan; provided, however, that,
except as contemplated in Section 5(f) hereof, the Board of
Directors shall not, without approval by a majority of the votes
cast by the stockholders of the Company at a meeting of stock-
holders at which a proposal to amend the Plan is voted upon: (i)
increase the maximum number of shares of Stock for which options
may be granted under the Plan, (ii) change the formula as to
minimum option prices, (iii) extend the period during which options
may be granted or exercised, or (iv) amend the requirements as to
the class of persons eligible to receive options. No termination or
<PAGE>
<PAGE>
amendment of the Plan may, without the consent of an Optionee,
adversely affect the rights of such Optionee under any option held
by such Optionee.

          9.   Effectiveness of Plan.  The Plan will not be made
effective unless approved by a majority of the votes cast by the
stockholders of the Company at a meeting of stockholders within
twelve (12) months from the date the Plan is adopted by the Board
of Directors, duly called and held for such purpose, and no option
granted hereunder shall be exercisable prior to such approval.

          10.  Other Actions.  Nothing contained in the Plan shall
be construed to limit the authority of the Company to exercise its
corporate rights and powers, including but not by way of
limitation, the right of the Company to grant or assume options for
proper corporate purposes other than under the Plan with respect to
any employee or other person, firm, corporation or association.


                                                       EXHIBIT 21

          SUBSIDIARIES OF INSITUFORM TECHNOLOGIES, INC.


     The following table sets forth certain information as of
December 31, 1999 concerning the Company and its subsidiaries.
Unless otherwise indicated, all securities of such subsidiaries are
owned by the Company:

                                                       % of Voting
       Name                  Place of Incorporation    Securities
       ----                  ----------------------    -----------

Affholder, Inc.              Missouri                  100
INA Acquisition Corp.        Delaware                  100
Insituform Technologies
 USA, Inc.                   Delaware                  100
Insituform France, S.A.      France                    66.6(1)
Insituform Holdings (UK)
 Ltd.                        United Kingdom            100(1)
Insituform Japan K.K.        Japan                     100(1)
Insituform Linings Plc.      United Kingdom             75(2)
Insituform (Netherlands)
 B.V.                        Netherlands and Delaware  100(1)
Insituform Technologies,
 Ltd.                        Alberta                   100
Insituform Technologies,
 Ltd.                        United Kingdom            100(2)
Insituform Rioolrenovatie-
  technieken B.V.            Netherlands               100(3)
Tite Liner NRO Corp.         Alberta                   100
United Pipeline Systems
 USA, Inc.*                  Delaware                  100
United Sistema de Tuberias
 Ltda.                       Chile                     100(4)
Video Injection S.A.         France                     80(1)


     Other subsidiaries of the Company are not named in the table
above.  Such unnamed subsidiaries considered in the aggregate as a
single subsidiary, would not constitute a significant subsidiary.


- -------------
(1)  Securities are owned by INA Acquisition Corp.
(2)  Securities are owned by Insituform Holdings (UK) Limited.
(3)  Securities are owned by Insituform (Netherlands) B.V.
(4)  Securities are owned 60% by Insituform Technologies, Inc. and
     40% by INA Acquisition Corp.

*  Effective December 31, 1999, such subsidiary was merged into the
Company.


                                                       Exhibit 23



            CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


     As independent public accountants, we hereby consent to the
incorporation of our report, dated February 15, 2000, included in
Insituform Technologies, Inc.'s 1999 Form 10-K, into the Company's
previously filed Registration Statements on Form S-8 Nos. 33-82486,
33-82488 and 33-63953.



ARTHUR ANDERSEN LLP



St. Louis, Missouri,
March 22, 2000

























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