SEWER LATERALS — RECAPTURING CAPACITY — EASIER THAN EXPECTED

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Abstract:

This paper presents the practical approach taken by the Springfield, Missouri utility to minimizeinfiltration and inflow (I/I) from private laterals. The utility had recaptured significant capacity by rehabilitating gravity mains and manholes over a ten year period but considerable capacitywas still being lost due to stormwater entering the sanitary system through private laterals.

The utility found solutions that were far less onerous and costly than originally anticipated. There was initial concern about cost and disruptions to private property. Fortunately the utility had collected lateral defect data during the Sanitary Sewer Evaluation survey (SSES) of their mains and manholes. This data included quantification estimates of eliminating eight categories of I/I. By analyzing this data, a phased approach was developed that minimized the impact on rate payers and maximized the amount of capacity recaptured by the utility.

The utility is working to obtain City Council approval to utilize a combination of public education and code enforcement to recapture sanitary sewer capacity lost to I/I.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864706783796538

Publication date: January 1, 2006

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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 These proceedings are not peer reviewed.

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