Sewer System Evaluation Survey

Definition - What does Sewer System Evaluation Survey mean?

A sewer system evaluation survey is a systematic evaluation used to investigate reports of excessive inflow or infiltration sources in a sewer system. The survey also assesses the flow rate and the cost for rehabilitation if said sources are found to be excessive. The typical sewer system evaluation survey includes the elements of physical evaluation, rainfall simulation, preparatory cleaning, internal inspection and the final survey report. Sewer system surveys are useful tools in confirming the need for trenchless repair or replacement efforts.

Trenchlesspedia explains Sewer System Evaluation Survey

Because of the expanse of some sewer systems, an economic and efficient manner of conducting these surveys is paramount. During a sewer system evaluation survey, the physical evaluation and internal inspection are done when ground water is at its highest level. To help save time, rainfall simulation can be conducted concurrently with the physical survey, preparatory cleaning or internal inspection. For cost effectiveness, only sewers in need of an internal inspection will receive one. This survey is also used to propose budgets and create preventative maintenance plans in order to keep up the proper operation of a given sewer system.

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