Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...

8.0: REPORT ON INTERNATIONAL SCAN ACTIVITIES AND FINDINGS
8.1 Introduction
An international review was undertaken to better understand the experiences of a wide range of utilities
that have embarked on significant CIPP rehabilitation programs over past decades. The purpose was to
assess internationally-based utilities’ views on the effectiveness of CIPP rehabilitation and to document
any efforts to evaluate and/or monitor the installed quality of their CIPP installations over the long term.
Face-to-face interviews were held with nine wastewater utilities located in the U.K., France, Germany,
Singapore, and Australia as shown in Table 8-1. The interviews were conducted between March and
October 2010. Appendix C contains a detailed interview report for each utility based upon their
experience with the performance of CIPP installations. In addition, the research team collected
information on CIPP use and quality control in Japan and contacted the Centre d’Expertise et de
Recherche en Infrastructures Urbaines (CERIU) in Montréal regarding a retrospective evaluation effort
that was underway for prior rehabilitation efforts in the Montréal region. These are discussed separately
in Sections 8.7 and 8.8.
Table 8-1. Utilities or Organizations Participating in this Review
First use of Total Network
Utility/Organization Country
CIPP Length (km)
Thames Water U.K. 1971 69,600
Severn Trent Water U.K. 1975 54,045
Agglomeration de Chartres France 2000 325
Agglomeration des Hauts-de-Bièvre France 1996 450
Göttingen Stadtentwässerung Germany 1992 375
Technische Betriebe der Stadt
Germany 1994 660
Leverkusen
Public Utilities Board Singapore Singapore 1997 3,660
Queensland Urban Utilities Australia 1979 6,844
Sydney Water Australia 1986 22,000
Japan Pipe Rehabilitation Quality
Assurance Association
Japan 1986 380,000
CERIU Canada N/A N/A
8.2 Rehabilitation Experience
Three of the participants first used CIPP in the 1970s, and may be considered early adopters of the
technology. The first CIPP was installed in London in 1971 for the Greater London Council’s
Metropolitan Water Board, now Thames Water Utilities, Ltd. A 70-m (230 ft) length of the Brick Lane
Sewer, a century old brick 1,170 × 850 mm (46 × 33 in.) egg shaped sewer located at Riverside Close,
Hackney, was lined with a 6 mm (0.24 in.) thick liner. Many of the first CIPP contracts in the U.K. were
undertaken for Thames Water and its agent authorities and by 1981 over a hundred successful
installations had been undertaken in the U.K. in sizes from 4 to 108 in. (200 to 2,740 mm). Much of the
early experience with CIPP was in Europe as Insituform, then the only player in the market, expanded its
coverage from the U.K. by licensing the technology to independent contractors. The Public Utilities
Board (PUB) Singapore did not use CIPP until 1994, but since then has been the biggest user among the
participants. Most of the participants also use other rehabilitation methods. Table 8-2 shows the relative
use of different methods at each utility.
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