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LESSONS LEARNED IN 25 YEARS OF SANITARY SEWER INVESTIGATION/REHABILITATION

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Abstract:

RJN Group, Inc. has completed sanitary sewer system investigation and rehabilitation on over 100 Million linear feet of sanitary sewer in the last 25 years. These projects have included a wide range of local climatic conditions, pipe age and material, and level of previous investigation/rehabilitation. The key variables in each of these investigation/rehabilitation programs were as follows:



Inflow source distribution/temporary flow meter spacing


Rainfall/inflow design storm projections


Private sector/public sector source distribution


System rehabilitation procedures


System rehabilitation costs


A representative sample of 100 projects was analyzed and included systems in Illinois, Arkansas, Massachusetts, Virginia, Maryland, Oklahoma, Florida, Georgia, Louisiana, Iowa, Indiana, Kentucky, Kansas, Missouri, Ohio, and Connecticut. Each of these projects contributed to the “lessons learned” matrix for successful I/I reduction programs, with success being defined as when infiltration/inflow reduction levels predicted in the investigation study were equaled or exceeded as measured in post-rehabilitation flow monitoring. Statistics gathered by analyzing each of the representative projects were used to draw conclusions about the investigation and rehabilitation procedures that are most likely to result in successful sewer system rehabilitation programs.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702784163065

Publication date: January 1, 2002

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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