Sanitary Sewer Evaluation Survey
Project Description:
In the past, the City of Wixom has determined that there are areas within the City that contribute excessive and unnecessary wet weather inflow and infiltration flows within the sanitary sewer collection system. Excess flow could be storm (rain) water, snow melt or ground water that enters the sanitary sewers through cracks in sewer pipes, manhole structures or through sanitary/storm sewer cross connections. This storm water is then unnecessarily sent through the sanitary sewers to the Wixom Wastewater Treatment Plant where it is treated as if it were sanitary flow. This unnecessary treatment is costly and could result in higher user fees. It could also create a situation where the capacity of the wastewater plant would be exceeded which could possibly result in the discharge of untreated sewage into the Norton Creek.
Therefore, in order to improve the performance and operation of the City’s sanitary sewer system, and to save the City money in treatment costs, the City hired Hubbell, Roth & Clark (HRC) to conduct a Sanitary Sewer Evaluation Survey (SSES). An SSES consists of manhole inspections, smoke testing, and/or internal sewer inspection (sewer televising). These inspection techniques are utilized to help identify system failures that are contributing to non-wastewater flows in the sanitary sewer system. The smoke testing consists of charging the sanitary sewers with odorless/non-toxic smoke, then documenting the locations where the smoke escapes the system. The internal sewer inspection involves running a video camera through the sewers to visually identify any illicit connections, cracks, breaks, etc. Subsequently, repairs are made to the problem areas that are discovered.
Project Information:
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