Process to Estimate Sanitary Sewer Pipe Remaining Life Provides MWWSSB Remedial Decision Information
A condition assessment study for the Water Works and Sanitary Sewer Board of the City of Montgomery's (MWWSSB's) West Catoma Interceptor (WCI) was conducted in 1998 and 2003. The WCI was evaluated in 1998 using core sampling, closed-circuit television, and manhole (MH) inspections. Approximately 193 MHs and 65,000 linear feet (LF) of pipe were inspected. A subsequent study conducted in 2003 was initiated to establish a protocol for defining the remaining useful life of the interceptor's structural constituents, and determine the rate of pipe deterioration in order to schedule rehabilitation, or replacement, of the interceptor. The 2003 study involved core sampling in locations approximately equal to the 1998 locations, and in additional locations. The standard for making interceptor structural constituent useful life projections was based on comparisons of interceptor and MH core samples taken during 1998 to samples taken during 2003. The data were used to estimate hydrogen sulfide (H2S) corrosion since 1998 and to develop reference criteria for the service life of reinforced concrete pipe and cast-in-place MHs (both rectangular and cylindrical). The condition assessment revealed that much of the interceptor had deteriorated at varying levels of severity because of H2S-induced corrosion. Both the 1998 and 2003 investigations provided information that the MWWSSB used to make corrective action decisions. The studies provided baseline criteria describing the theoretical useful life of the interceptor and its structural constituents. Using figures and comparative legends, the present study demonstrates that 72% of the 65,000 LF of interceptor evaluated has an estimated remaining service life ranging from zero to five years. On the basis of this information, the MWWSSB adopted a corrective action implementation plan for the WCI.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2006-01-01
More about this publication?
- 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 These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites